REG104FA-5/500G3 - Texas Instruments

DMOS

1A Low-Dropout Regulator

FEATURES

●NEW DMOS TOPOLOGY:

Ultra Low Dropout Voltage:

230mV typ at 1A and 3.3V Output

Output Capacitor NOT Required for Stability

●FAST TRANSIENT RESPONSE

●VERY LOW NOISE: 33µVRMS

●HIGH ACCURACY: ±2% max

●HIGH EFFICIENCY:

IGND = 1.7mA at IOUT = 1A

Not Enabled: IGND = 0.5µA

●2.5V, 2.7V, 3.0V, 3.3V, 5.0V AND

ADJUSTABLE OUTPUT VERSIONS

●THERMAL PROTECTION

●SMALL SURFACE-MOUNT PACKAGES:

SOT223-5, DDPAK-5

APPLICATIONS

●PORTABLE COMMUNICATION DEVICES

●BATTERY-POWERED EQUIPMENT

●MODEMS

●BAR-CODE SCANNERS

●BACKUP POWER SUPPLIES

DESCRIPTION

The REG104 is a family of low-noise, low-dropout linear

regulators with low ground pin current. Its new DMOS topol-

ogy provides significant improvement over previous designs,

including low dropout voltage (only 230mV typ at full load),

and better transient performance. In addition, no output

capacitor is required for stability, unlike conventional low

dropout regulators that are difficult to compensate and

require expensive low ESR capacitors greater than 1µF.

Typical ground pin current is only 1.7mA (at IOUT = 1A) and

drops to 0.5µA in

not enabled

mode. Unlike regulators with

PNP pass devices, quiescent current remains relatively con-

stant over load variations and under dropout conditions.

The REG104 has very low output noise (typically 33µVRMS

for VOUT = 3.3V with CNR = 0.01µF), making it ideal for use

in portable communications equipment. On-chip trimming

results in high output voltage accuracy. Accuracy is main-

tained over temperature, line, and load variations. Key pa-

rameters are tested over the specified temperature range

(–40°C to +85°C).

The REG104 is well protected—internal circuitry provides a

current limit which protects the load from damage. Thermal

protection circuitry keeps the chip from being damaged by

excessive temperature. The REG104 is available in the

DDPAK-5 and the SOT223-5.

REG104

(Fixed Voltage

Versions)

Enable

Gnd

0.1µFCOUT(1)

+VOUT

VIN

NR = Noise Reduction

NOTE: (1) Optional.

REG104-A

Gnd

Enable

0.1µF

+COUT(1)

VOUT

VIN

Adj

REG104

SBVS025G – SEPTEMBER 2001 – REVISED SEPTEMBER 2005

www.ti.com

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.

SBVS025G

REG104

ABSOLUTE MAXIMUM RATINGS(1)

Supply Input Voltage, VIN .......................................................–0.3V to 16V

Enable Input Voltage, VEN....................................................... –0.3V to VIN

Feedback Voltage, VFB ........................................................ –0.3V to 6.0V

NR Pin Voltage, VNR .............................................................–0.3V to 6.0V

Output Short-Circuit Duration ......................................................Indefinite

Operating Temperature Range ....................................... –55°C to +125°C

Storage Temperature Range .......................................... –65°C to +150°C

Junction Temperature ..................................................... –55°C to +150°C

Lead Temperature (soldering, 3s, SOT, and DDPAK)................... +240°C

ESD Rating: HBM (VOUT to GND) ..................................................... 1.5kV

HBM (All other pins)........................................................ 2kV

CDM.............................................................................. 500V

NOTE: (1) Stresses above these ratings may cause permanent damage.

Exposure to absolute maximum conditions for extended periods may degrade

device reliability.

PIN CONFIGURATIONS

Top View

NOTE: (1) For REG104A-A: voltage setting resistor pin.

All other models: noise reduction capacitor pin.

Gnd

Enable

VIN

NR/Adjust(1)

12345

DDPAK-5 SOT223-5

(KTT Package) (DCQ Package)

Tab is Gnd

Enable

NR/Adjust(1)

GndVIN

12345

VOUT

ELECTROSTATIC

DISCHARGE SENSITIVITY

This integrated circuit can be damaged by ESD. Texas Instru-

ments recommends that all integrated circuits be handled with

appropriate precautions. Failure to observe proper handling

and installation procedures can cause damage.

ESD damage can range from subtle performance degradation

to complete device failure. Precision integrated circuits may be

more susceptible to damage because very small parametric

changes could cause the device not to meet its published

specifications.

PACKAGE/ORDERING INFORMATION(1)

PRODUCT VOUT

REG104xx-

yyyy/zzz

XX is package designator.

YYYY is typical output voltage (5 = 5.0V, 2.85 = 2.85V, A = Adjustable).

ZZZ is package quantity.

(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI website at www.ti.com.

REG104 3

SBVS025G

REG104GA

REG104FA

PARAMETER CONDITION MIN TYP MAX UNITS

OUTPUT VOLTAGE

Output Voltage Range VOUT

REG104-2.5 2.5 V

REG104-2.7 2.7 V

REG104-3.0 3.0 V

REG104-3.3 3.3 V

REG104-5 5V

REG104-A VREF 5.5 V

Reference Voltage VREF 1.295 V

Adjust Pin Current IADJ 0.2 1 µA

Accuracy ±0.5 ±2%

TJ = –40°C to +85°C±3.0 %

vs Temperature dVOUT/dT TJ = –40°C to +85°C70ppm/°C

vs Line and Load IOUT = 10mA to 1A, VIN = (VOUT + 0.7V) to 15V ±0.5 ±2.5 %

TJ = –40°C to +85°CV

IN = (VOUT + 0.9V) to 15V ±3.5 %

DC DROPOUT VOLTAGE(2, 3) VDROP IOUT = 10mA 3 25 mV

For all models except 5V IOUT = 1A 230 400 mV

For 5V model IOUT = 1A 320 500 mV

For all models except 5V IOUT = 1A 480 mV

TJ = –40°C to +85°C

For 5V models IOUT = 1A 580 mV

TJ = –40°C to +85°C

VOLTAGE NOISE

f = 10Hz to 100kHz Vn

Without CNR (all models) CNR = 0, COUT = 0 35µVRMS/V • VOUT µVRMS

With CNR (all fixed voltage models) CNR = 0.01µF, COUT = 10µF10µVRMS/V • VOUT µVRMS

OUTPUT CURRENT

Current Limit(4) ICL 1.2 1.7 2.1 A

TJ = –40°C to +85°C1.0 2.2 A

RIPPLE REJECTION

f = 120Hz 65 dB

ENABLE CONTROL

VENABLE High (output enabled) VENABLE 2V

IN V

VENABLE Low (output disabled) –0.2 0.5 V

IENABLE High (output enabled) IENABLE VENABLE = 2V to VIN, VIN = 2.1V to 6.5(5) 1 100 nA

IENABLE Low (output disabled) VENABLE = 0V to 0.5V 2 100 nA

Output Disable Time 50 µs

Output Enable Softstart Time 1.5 ms

THERMAL SHUTDOWN

Junction Temperature

Shutdown 150 °C

Reset from Shutdown 130 °C

GROUND PIN CURRENT

Ground Pin Current IGND IOUT = 10mA 0.5 0.7 mA

IOUT = 1A 1.7 1.8 mA

Enable Pin Low VENABLE ≤ 0.5V 0.5 µA

INPUT VOLTAGE VIN

Operating Input Voltage Range(6) 2.1 15 V

Specified Input Voltage Range VIN > 2.7V VOUT + 0.7 15 V

TJ = –40°C to +85°CV

IN > 2.9V VOUT + 0.9 15 V

TEMPERATURE RANGE

Specified Range TJ–40 +85 °C

Operating Range –55 +125 °C

Storage Range –65 +150 °C

Thermal Resistance

DDPAK-5 Surface Mount

JC Junction-to-Case 4 °C/W

SOT223-5 Surface Mount

JC Junction-to-Case 15 °C/W

NOTES: (1) The REG104 does not require a minimum output capacitor for stability. However, transient response can be improved with proper capacitor selection.

(2) Dropout voltage is defined as the input voltage minus the output voltage that produces a 2% change in the output voltage from the value at VIN = VOUT + 1V

at fixed load.

(3) Not applicable for VOUT less than 2.7V.

(4) Current limit is the output current that produces a 15% change in output voltage from VIN = VOUT + 1V and IOUT = 10mA.

(5) For VIN > 6.5V, see typical characteristic

VENABLE vs IENABLE

(6) The REG104 no longer regulates when VIN < VOUT + VDROP (MAX). In drop-out or when the input voltage is between 2.7V and 2.1V, the impedance from VIN

to VOUT is typically less than 1Ω at TJ = +25°C. See typical characteristic

Output Voltage Change vs VIN

ELECTRICAL CHARACTERISTICS

Boldface limits apply over the specified temperature range, TJ = –40°C to +85°C

At TJ = +25°C, VIN = VOUT + 1V (VOUT = 3.0V for REG104-A), VENABLE = 2V, IOUT = 10mA, CNR = 0.01µF, and COUT = 0.1µF(1), unless otherwise noted.

SBVS025G

REG104

TYPICAL CHARACTERISTICS

For all models, at TJ = +25°C and VENABLE = 2V, unless otherwise noted.

0 200100 600500400300 700 800 900 1000

0.8

0.6

0.4

0.2

–0.2

–0.4

–0.6

–0.8

–1

–1.2

Output Voltage Change (%)

Output Current (mA)

OUTPUT VOLTAGE CHANGE vs I

OUT

= V

OUT

+ 1V, Output Voltage % Change

Referred to I

OUT

= 10mA at +25°C)

+125°C

+25°C

–55°C

0 200 600400 800 1000

350

300

250

200

150

100

DC Dropout Voltage (mV)

IOUT (mA)

DC DROPOUT VOLTAGE vs IOUT

+125°C

+25°C

–55°C

–60 –40 –20 40 600 20 10080 120

0.6

0.4

0.2

–0.2

–0.4

–0.6

–0.8

–1

–1.2

Output Voltage (%)

Temperature (°C)

OUTPUT VOLTAGE CHANGE vs IOUT

(Output Voltage % Change Referred to

OUT

= 10mA at +25°C)

OUT

= 10mA

OUT

= 200mA

OUT

= 1000mA

–75 –50 –25 25 500 10075 125

350

300

250

200

150

100

DC Dropout Voltage (mV)

Temperature (°C)

DC DROPOUT VOLTAGE vs TEMPERATURE

OUT

= 1000mA

OUT

= 200mA

OUT

= 10mA

–75 –50 –25 25 500 10075 125

0.5

0.4

0.3

0.2

0.1

Output Voltage Change (%)

Temperature (°C)

LINE REGULATION vs TEMPERATURE

= V

OUT

+ 1V to 16V)

OUT

= 10mA

OUT

= 200mA

02 6841012

0.5

–0.5

–1

–1.5

–2

Output Voltage Change (%)

Input Voltage Above VOUT (V)

OUTPUT VOLTAGE CHANGE vs VIN

(Output Voltage % Change Referred to

VIN = VOUT + 1V at IOUT = 10mA)

OUT

= 10mA

OUT

= 1000mA

OUT

= 200mA

REG104 5

SBVS025G

TYPICAL CHARACTERISTICS (Cont.)

For all models, at TJ = +25°C and VENABLE = 2V, unless otherwise noted.

6V VIN

VOUT

50mV/div50mV/div

50µs/div

LINE TRANSIENT RESPONSE

COUT = 10µF

COUT = 0

REG104-3.3

IOUT = 200mA

1A ILOAD

VOUT

10mA

500mV/div500mV/div

10µs/div

LOAD TRANSIENT RESPONSE

COUT = 10µF

COUT = 0 REG104-3.3

COUT = 0

REG104–A

CFB = 0.01µF, VOUT = 3.3V

COUT = 10µF

ILOAD

10mA

LOAD TRANSIENT RESPONSE

10µs/div

500mV/div500mV/div

OUT

= 0

REG104–A

Load = 200mA, C

= 0.01µF, V

OUT

= 3.3V

OUT

= 10µF

LOAD TRANSIENT RESPONSE

50µs/div

50mV/div50mV/div

0.5

0.4

0.3

0.2

0.1

Output Voltage Change (%)

Temperature (°C)

LOAD REGULATION vs TEMPERATURE

= V

OUT

+ 1V and 10mA < I

OUT

< 1000mA)

–60 –40 –20 40 600 20 10080 120

10 100 1000 10000 100,000

0.5

0.2

0.1

0.05

0.02

0.01

Noise Density (µV/√Hz)

Frequency (Hz)

OUTPUT NOISE DENSITY

= 0

OUT

= 0

= 0.01µF

OUT

= 10µF

SBVS025G

REG104

TYPICAL CHARACTERISTICS (Cont.)

For all models, at TJ = +25°C and VENABLE = 2V, unless otherwise noted.

–60 –40 –20 0 20 40 60 80 120100

1.8

1.6

1.4

1.2

0.8

0.6

0.4

IGND (mA)

Temperature (°C)

GROUND PIN CURRENT vs TEMPERATURE

IOUT = 1000mA

IOUT = 200mA

IOUT = 10mA

–75 –50 –25 0 25 50 75 100 125

2.5

1.5

0.5

GND

(µA)

Temperature (°C)

GROUND PIN CURRENT, NOT ENABLED

vs TEMPERATURE

ENABLE

= 0V

1.6

1.4

1.2

0.8

0.6

0.4

GND

(mA)

OUT

(mA)

GROUND PIN CURRENT vs I

OUT

1 10010 1000

–20–40 0 40 80 120–60 20 60 100 140

0.28

0.26

0.24

0.22

0.20

0.18

0.16

0.14

Adjust Pin Current (µA)

Temperature (°C)

ADJUST

vs TEMPERATURE

REG104-A

1850

1800

1750

1700

1650

1600

1550

Current Limit (mA)

Temperature (°C)

CURRENT LIMIT vs TEMPERATURE

–60 –40 –20 40 600 20 10080 120

OUT

= V

OUT-NOMINAL

• 0.90

OUT

= 1V

10 100 1k 10k 100k

Ripple Rejection (dB)

Frequency (Hz)

RIPPLE REJECTION vs FREQUENCY

OUT

= 10µF

OUT

= 0

REG104 7

SBVS025G

TYPICAL CHARACTERISTICS (Cont.)

For all models, at TJ = +25°C and VENABLE = 2V, unless otherwise noted.

0 200 400 600 800 1000

Ripple Rejection (dB)

OUT

(mA)

RIPPLE REJECTION vs I

OUT

RIPPLE

= 3Vp-p, f = 120Hz

2V V

ENABLE

OUT

1V/div

250µs/div

SOFT START

ENABLE

OUT

1V/div

10µs/div

OUTPUT DISABLE TIME

OUT

= 0

OUTPUT VOLTAGE DRIFT HISTOGRAM

Percent of Units (%)

OUT

Drift (ppm/°C)

40 45 50 55 60 65 70 75 80 85 90

OUTPUT VOLTAGE ACCURACY HISTOGRAM

Percent of Units (%)

Error (%)

–1–0.8 –0.6 –0.4 –0.2 0 0.2 0.4 0.6 0.8 1

SBVS025G

REG104

BASIC OPERATION

The REG104 series is a family of LDO (Low DropOut) linear

regulators. The family includes five fixed output versions

(2.5V to 5.0V) and an adjustable output version. An internal

DMOS power device provides low dropout regulation with

near constant ground pin current (largely independent of load

and dropout conditions) and very fast line and load transient

response. All versions include internal current limit and

thermal shutdown circuitry.

Figure 1 shows the basic circuit connections for the fixed

voltage models. Figure 2 gives the connections for the

adjustable output version (REG104A) and example resistor

values for some commonly used output voltages. Values for

other voltages can be calculated from the equation shown in

Figure 2.

FIGURE 1. Fixed Voltage Nominal Circuit for REG104.

REG104

Enable

VOUT

COUT

VIN

0.1µF

CNR

0.01µF

Gnd NR

In Out

Optional

FIGURE 2. Adjustable Voltage Circuit for REG104A.

VOUT = (1 + R1/R2) • 1.295V

Pin numbers for SOT-223 package.

REG104

VIN

0.1µF

Gnd

VOUT

R1CFB

0.01µFCOUT

Adj

IADJ Load

Enable

To reduce current through divider, increase resistor

values (see table at right).

As the impedance of the resistor divider increases,

IADJ (~200nA) may introduce an error.

CFB improves noise and transient response.

VOUT (V) R1 (Ω)(1) R2 (Ω)(1)

1.295 Short Open

2.5 12.1k 13k

1.21k 1.3k

3 16.9k 13k

1.69k 1.3k

3.3 20k 13k

2.0k 1.3k

5 37.4k 13k

3.74k 1.3k

NOTE: (1) Resistors are standard 1% values.

EXAMPLE RESISTOR VALUES

Optional

Enable

= 10V

175kΩ

FIGURE 3. Enable Pin Equivalent Input Circuit.

None of the versions require an output capacitor for regulator

stability. The REG104 will accept any output capacitor type

less than 1µF. For capacitance values larger than 1µF the

effective ESR should be greater than 0.1Ω. This minimum

ESR value includes parasitics such as printed circuit board

traces, solder joints, and sockets. A minimum 0.1µF low ESR

capacitor connected to the input supply voltage is recom-

mended.

ENABLE

The Enable pin allows the regulator to be turned on and off.

This pin is active HIGH and compatible with standard TTL-

CMOS levels. Inputs below 0.5V (max) turn the regulator off

and all circuitry is disabled. Under this condition ground-pin

current drops to approximately 0.5µA.

When not used, the Enable pin may be connected to VIN.

Internal to the part, the Enable pin is connected to an input

resistor-zener diode circuit, as shown in Figure 3, creating a

nonlinear input impedance.

REG104 9

SBVS025G

0 2 4 6 8 10 12 14 16

100

0.1

0.01

0.001

Enable Current (µA)

Enable Voltage

FIGURE 4. Enable Pin Current versus Applied Voltage.

The Enable Pin Current versus Applied Voltage relationship

is shown in Figure 4. When the Enable pin is connected to

VIN greater than 10V, a series resistor may be used to limit

the current.

FIGURE 5. Block Diagram.

FIGURE 6. Output Noise versus Noise Reduction Capacitor.

Since the value of V

REF

is 1.295V, this relationship reduces to:

VVVV

NRMS OUT

=µ•35

Connecting a capacitor, CNR, from the Noise-Reduction (NR)

pin to ground can reduce the output noise voltage. Adding

CNR, as shown in Figure 5, forms a low-pass filter for the

voltage reference. For CNR = 10nF, the total noise in the

10Hz to 100kHz bandwidth is reduced by approximately

a factor of 3.5. This noise reduction effect is shown in

Figure 6.

Over Current

Over Temp

Protection

VREF

(1.295V)

Low Noise

Charge Pump

DMOS

Output

NOTE: R1 and R2 are internal

on fixed output versions.

VOUT

Adj

(Adjustable

Versions)

(fixed output

versions only)

Enable

REG104

VIN

CNR

(optional)

0.001 0.01 0.1 1

Output Noise Voltage

(µVRMS 10Hz - 100kHz)

CNR (µF)

COUT = 0

COUT = 10µF

REG104-3.3

OUTPUT NOISE

A precision band-gap reference is used for the internal

reference voltage, VREF, for the REG104. This reference is

the dominant noise source within the REG104. It generates

approximately 45µVRMS in the 10Hz to 100kHz bandwidth at

the reference output. The regulator control loop gains up the

reference noise, so that the noise voltage of the regulator is

approximately given by:

RVV

NRMS RMS OUT

REF

=µ +=µ •45 245

The REG104 adjustable version does not have the noise-

reduction pin available, however, the adjust pin is the

summing junction of the error amplifier. A capacitor, CFB,

SBVS025G

REG104

connected from the output to the adjust pin will reduce both

the output noise and the peak error from a load transient.

Figure 7 shows improved output noise performance for two

capacitor combinations.

FIGURE 7. Output Noise Density on Adjustable Versions.

FIGURE 8. Transient and DC Dropout.

For large step changes in load current, the REG104 requires

a larger voltage drop across it to avoid degraded transient

response. The boundary of this

transient dropout

region is

shown as the top line in Figure 8. Values of VIN to VOUT

voltage drop above this line insure normal transient re-

sponse.

In the transient dropout region between

and

Transient

transient response recovery time increases. The time re-

quired to recover from a load transient is a function of both

the magnitude and rate of the step change in load current

and the available

headroom

VIN to VOUT voltage drop. Under

worst-case conditions (full-scale load change with VIN to

VOUT voltage drop close to DC dropout levels), the REG104

can take several hundred microseconds to re-enter the

specified window of regulation.

TRANSIENT RESPONSE

The REG104 response to transient line and load conditions

improves at lower output voltages. The addition of a capaci-

tor (nominal value 10nF) from the output pin to ground may

improve the transient response. In the adjustable version, the

addition of a capacitor, CFB (nominal value 10nF), from the

output to the adjust pin will also improve the transient

response.

THERMAL PROTECTION

Power dissipated within the REG104 will cause the junction

temperature to rise. The REG104 has thermal shutdown

circuitry that protects the regulator from damage. The ther-

mal protection circuitry disables the output when the junc-

tion temperature reaches approximately 150°C, allowing

the device to cool. When the junction temperature cools to

approximately 130°C, the output circuitry is again enabled.

Depending on various conditions, the thermal protection

circuit may cycle on and off. This limits the dissipation of the

regulator, but may have an undesirable effect on the load.

Any tendency to activate the thermal protection circuit indi-

cates excessive power dissipation or an inadequate heat

sink. For reliable operation, junction temperature should be

limited to 125°C, maximum. To estimate the margin of safety

in a complete design (including heat sink), increase the

ambient temperature until the thermal protection is triggered.

Use worst-case loads and signal conditions. For good reli-

ability, thermal protection should trigger more than 35°C

above the maximum expected ambient condition of your

application. This produces a worst-case junction temperature

of 125°C at the highest expected ambient temperature and

worst-case load.

The internal protection circuitry of the REG104 has been

designed to protect against overload conditions. It was not

intended to replace proper heat sinking. Continuously run-

ning the REG104 into thermal shutdown will degrade reliabil-

ity.

250

200

150

100

Drop Out Voltage (mV)

0 100 200 300 400 500

IOUT (mA)

REG104 –3.3 at 25°C

Transient

10010 1000 10000 100000

10.0

1.0

0.1

nV/√Hz

Frequency

COUT = 0, CFB = 0

COUT = 0, CFB = 0.01µF

COUT = 10µF, CFB = 0.01µF

The REG104 utilizes an internal charge pump to develop an

internal supply voltage sufficient to drive the gate of the

DMOS pass element above VIN. The charge-pump switching

noise (nominal switching frequency = 2MHz) is not measur-

able at the output of the regulator.

DROP-OUT VOLTAGE

The REG104 uses an N-channel DMOS as the

pass

ele-

ment. When the input voltage is within a few hundred

millivolts of the output voltage, the DMOS device behaves

like a resistor. Therefore, for low values of VIN to VOUT, the

regulator’s input-to-output resistance is the RdsON of the

DMOS pass element (typically 230mΩ). For static (DC)

loads, the REG104 will typically maintain regulation down to

VIN to VOUT voltage drop of 230mV at full rated output current.

In Figure 8, the bottom line (DC dropout) shows the minimum

VIN to VOUT voltage drop required to prevent dropout under

DC load conditions.

REG104 11

SBVS025G

FIGURE 9. Maximum Power Dissipation versus Ambient

Temperature for the Various Packages and

PCB Heat Sink Configurations.

POWER DISSIPATION

The REG104 is available in two different package configura-

tions. The ability to remove heat from the die is different for

each package type and, therefore, presents different consid-

erations in the printed circuit board (PCB) layout. The PCB

area around the device that is free of other components

moves the heat from the device to the ambient air. While it

is difficult to impossible to quantify all of the variables in a

thermal design of this type, performance data for several

configurations are shown in Figure 9. In all cases the PCB

copper area is bare copper, free of solder resist mask, and

not solder plated. All examples are for 1-ounce copper. Using

heavier copper will increase the effectiveness in moving the

heat from the device. In those examples where there is

copper on both sides of the PCB, no connection has been

provided between the two sides. The addition of plated

through holes will improve the heat sink effectiveness.

Power dissipation depends on input voltage and load condi-

tions. Power dissipation is equal to the product of the aver-

age output current times the voltage across the output

element, VIN to VOUT voltage drop.

PVV I

DIN

OUT OUT AVG

=•(–)()

Power dissipation can be minimized by using the lowest

possible input voltage necessary to assure the required

output voltage.

Power Dissipation (Watts)

0 25 50 75 125100

Ambient Temperature (°C)

CONDITIONS

CONDITION PACKAGE PCB AREA

1 DDPAK 4in2 Top Side Only 27°C/W

2 SOT-223 4in2 Top Side Only 53°C/W

3 DDPAK None 65°C/W

4 SOT-223 0.5in2 Top Side Only 110°C/W

SBVS025G

REG104

FIGURE 10. Thermal Resistance versus PCB Area for the Five-Lead DDPAK.

FIGURE 11. Thermal Resistance versus PCB Area for the Five Lead SOT-223.

Thermal Resistance, θJA (°C/W)

012345

Copper Area (inches2)

REG104

Surface Mount Package

1 oz. copper

Circuit Board Copper Area

REG104

DDPAK Surface Mount Package

THERMAL RESISTANCE vs PCB COPPER AREA

180

160

140

120

100

Thermal Resistance, JA (°C/W)

012345

Copper Area (inches2)

Circuit Board Copper Area

REG104

SOT-223 Surface Mount Package

REG104

Surface Mount Package

1 oz. copper

REGULATOR MOUNTING

The tab of both packages is electrically connected to ground.

For best thermal performance, the tab of the DDPAK sur-

face-mount version should be soldered directly to a circuit-

board copper area. Increasing the copper area improves

heat dissipation. Figure 10 shows typical thermal resistance

from junction to ambient as a function of the copper area for

the DDPAK. Figure 11 shows the same relationship for the

SOT-223.

Although the tabs of the DDPAK and the SOT-223 are

electrically grounded, they are not intended to carry any

current. The copper pad that acts as a heat sink should be

isolated from the rest of the circuit to prevent current flow

through the device from the tab to the ground pin. Solder pad

footprint recommendations for the various REG104 devices

are presented in the Application Bulletin

Solder Pad Recom-

mendations for Surface-Mount Devices

(SBFA015A), avail-

able from the Texas Instruments web site (www.ti.com).

PACKAGE OPTION ADDENDUM

www.ti.com 17-Aug-2012

Addendum-Page 1

PACKAGING INFORMATION

Orderable Device Status (1) Package Type Package

Drawing Pins Package Qty Eco Plan (2) Lead/

Ball Finish MSL Peak Temp (3) Samples

(Requires Login)

REG104FA-2.5 OBSOLETE DDPAK/

TO-263 KTT 5 TBD Call TI Call TI

REG104FA-2.5/500 ACTIVE DDPAK/

TO-263 KTT 5 500 Green (RoHS

& no Sb/Br) CU SN Level-2-260C-1 YEAR

REG104FA-2.5/500G3 ACTIVE DDPAK/

TO-263 KTT 5 500 Green (RoHS

& no Sb/Br) CU SN Level-2-260C-1 YEAR

REG104FA-2.5KTTT ACTIVE DDPAK/

TO-263 KTT 5 50 Green (RoHS

& no Sb/Br) CU SN Level-2-260C-1 YEAR

REG104FA-2.5KTTTG3 ACTIVE DDPAK/

TO-263 KTT 5 50 Green (RoHS

& no Sb/Br) CU SN Level-2-260C-1 YEAR

REG104FA-2.7 OBSOLETE DDPAK/

TO-263 KTT 5 TBD Call TI Call TI

REG104FA-3 OBSOLETE DDPAK/

TO-263 KTT 5 TBD Call TI Call TI

REG104FA-3.3 OBSOLETE DDPAK/

TO-263 KTT 5 TBD Call TI Call TI

REG104FA-3.3/500 ACTIVE DDPAK/

TO-263 KTT 5 500 Green (RoHS

& no Sb/Br) CU SN Level-2-260C-1 YEAR

REG104FA-3.3/500G3 ACTIVE DDPAK/

TO-263 KTT 5 500 Green (RoHS

& no Sb/Br) CU SN Level-2-260C-1 YEAR

REG104FA-3.3KTTT ACTIVE DDPAK/

TO-263 KTT 5 50 Green (RoHS

& no Sb/Br) CU SN Level-2-260C-1 YEAR

REG104FA-3.3KTTTG3 ACTIVE DDPAK/

TO-263 KTT 5 50 Green (RoHS

& no Sb/Br) CU SN Level-2-260C-1 YEAR

REG104FA-3/500 NRND DDPAK/

TO-263 KTT 5 TBD Call TI Call TI

REG104FA-3/500G3 NRND DDPAK/

TO-263 KTT 5 TBD Call TI Call TI

REG104FA-3KTTT NRND DDPAK/

TO-263 KTT 5 50 Green (RoHS

& no Sb/Br) CU SN Level-2-260C-1 YEAR

REG104FA-3KTTTG3 NRND DDPAK/

TO-263 KTT 5 50 Green (RoHS

& no Sb/Br) CU SN Level-2-260C-1 YEAR

REG104FA-5 OBSOLETE DDPAK/

TO-263 KTT 5 TBD Call TI Call TI

PACKAGE OPTION ADDENDUM

www.ti.com 17-Aug-2012

Addendum-Page 2

Orderable Device Status (1) Package Type Package

Drawing Pins Package Qty Eco Plan (2) Lead/

Ball Finish MSL Peak Temp (3) Samples

(Requires Login)

REG104FA-5/500 ACTIVE DDPAK/

TO-263 KTT 5 500 Green (RoHS

& no Sb/Br) CU SN Level-2-260C-1 YEAR

REG104FA-5/500G3 ACTIVE DDPAK/

TO-263 KTT 5 500 Green (RoHS

& no Sb/Br) CU SN Level-2-260C-1 YEAR

REG104FA-5KTTT ACTIVE DDPAK/

TO-263 KTT 5 50 Green (RoHS

& no Sb/Br) CU SN Level-2-260C-1 YEAR

REG104FA-5KTTTG3 ACTIVE DDPAK/

TO-263 KTT 5 50 Green (RoHS

& no Sb/Br) CU SN Level-2-260C-1 YEAR

REG104FA-A OBSOLETE DDPAK/

TO-263 KTT 5 TBD Call TI Call TI

REG104FA-A/500 ACTIVE DDPAK/

TO-263 KTT 5 500 Green (RoHS

& no Sb/Br) CU SN Level-2-260C-1 YEAR

REG104FA-A/500G3 ACTIVE DDPAK/

TO-263 KTT 5 500 Green (RoHS

& no Sb/Br) CU SN Level-2-260C-1 YEAR

REG104FA-AKTTT ACTIVE DDPAK/

TO-263 KTT 5 50 Green (RoHS

& no Sb/Br) CU SN Level-2-260C-1 YEAR

REG104FA-AKTTTG3 ACTIVE DDPAK/

TO-263 KTT 5 50 Green (RoHS

& no Sb/Br) CU SN Level-2-260C-1 YEAR

REG104GA-2.5 ACTIVE SOT-223 DCQ 6 78 Green (RoHS

& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR

REG104GA-2.5/2K5 ACTIVE SOT-223 DCQ 6 2500 Green (RoHS

& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR

REG104GA-2.5/2K5G4 ACTIVE SOT-223 DCQ 6 2500 Green (RoHS

& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR

REG104GA-2.5G4 ACTIVE SOT-223 DCQ 6 78 Green (RoHS

& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR

REG104GA-3 NRND SOT-223 DCQ 6 78 Green (RoHS

& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR

REG104GA-3.3 ACTIVE SOT-223 DCQ 6 78 Green (RoHS

& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR

REG104GA-3.3/2K5 ACTIVE SOT-223 DCQ 6 2500 Green (RoHS

& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR

REG104GA-3.3/2K5G4 ACTIVE SOT-223 DCQ 6 2500 Green (RoHS

& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR

REG104GA-3.3G4 ACTIVE SOT-223 DCQ 6 78 Green (RoHS

& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR

PACKAGE OPTION ADDENDUM

www.ti.com 17-Aug-2012

Addendum-Page 3

Orderable Device Status (1) Package Type Package

Drawing Pins Package Qty Eco Plan (2) Lead/

Ball Finish MSL Peak Temp (3) Samples

(Requires Login)

REG104GA-3G4 NRND SOT-223 DCQ 6 78 Green (RoHS

& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR

REG104GA-5 ACTIVE SOT-223 DCQ 6 78 Green (RoHS

& no Sb/Br) CU SN Level-2-260C-1 YEAR

REG104GA-5/2K5 ACTIVE SOT-223 DCQ 6 2500 Green (RoHS

& no Sb/Br) CU SN Level-2-260C-1 YEAR

REG104GA-5/2K5G4 ACTIVE SOT-223 DCQ 6 2500 Green (RoHS

& no Sb/Br) CU SN Level-2-260C-1 YEAR

REG104GA-5G4 ACTIVE SOT-223 DCQ 6 78 Green (RoHS

& no Sb/Br) CU SN Level-2-260C-1 YEAR

REG104GA-A ACTIVE SOT-223 DCQ 6 78 Green (RoHS

& no Sb/Br) CU SN Level-2-260C-1 YEAR

REG104GA-A/2K5 ACTIVE SOT-223 DCQ 6 2500 Green (RoHS

& no Sb/Br) CU SN Level-2-260C-1 YEAR

REG104GA-A/2K5G4 ACTIVE SOT-223 DCQ 6 2500 Green (RoHS

& no Sb/Br) CU SN Level-2-260C-1 YEAR

REG104GA-AG4 ACTIVE SOT-223 DCQ 6 78 Green (RoHS

& no Sb/Br) CU SN Level-2-260C-1 YEAR

(1) The marketing status values are defined as follows:

ACTIVE: Product device recommended for new designs.

LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.

NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.

PREVIEW: Device has been announced but is not in production. Samples may or may not be available.

OBSOLETE: TI has discontinued the production of the device.

(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability

information and additional product content details.

TBD: The Pb-Free/Green conversion plan has not been defined.

Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that

lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.

Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between

the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.

Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight

in homogeneous material)

(3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.

PACKAGE OPTION ADDENDUM

www.ti.com 17-Aug-2012

Addendum-Page 4

Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information

provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and

continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.

TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.

In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.

TAPE AND REEL INFORMATION

*All dimensions are nominal

Device Package

Type Package

Drawing Pins SPQ Reel

Diameter

(mm)

Reel

Width

W1 (mm)

(mm) B0

(mm) K0

(mm) P1

(mm) W

(mm) Pin1

Quadrant

REG104FA-2.5/500 DDPAK/

TO-263 KTT 5 500 330.0 24.4 10.6 15.6 4.9 16.0 24.0 Q2

REG104FA-2.5KTTT DDPAK/

TO-263 KTT 5 50 330.0 24.4 10.6 15.6 4.9 16.0 24.0 Q2

REG104FA-3.3/500 DDPAK/

TO-263 KTT 5 500 330.0 24.4 10.6 15.6 4.9 16.0 24.0 Q2

REG104FA-3.3KTTT DDPAK/

TO-263 KTT 5 50 330.0 24.4 10.6 15.6 4.9 16.0 24.0 Q2

REG104FA-3KTTT DDPAK/

TO-263 KTT 5 50 330.0 24.4 10.6 15.6 4.9 16.0 24.0 Q2

REG104FA-5/500 DDPAK/

TO-263 KTT 5 500 330.0 24.4 10.6 15.6 4.9 16.0 24.0 Q2

REG104FA-5KTTT DDPAK/

TO-263 KTT 5 50 330.0 24.4 10.6 15.6 4.9 16.0 24.0 Q2

REG104FA-A/500 DDPAK/

TO-263 KTT 5 500 330.0 24.4 10.6 15.6 4.9 16.0 24.0 Q2

REG104FA-AKTTT DDPAK/

TO-263 KTT 5 50 330.0 24.4 10.6 15.6 4.9 16.0 24.0 Q2

REG104GA-2.5/2K5 SOT-223 DCQ 6 2500 330.0 12.4 6.8 7.3 1.88 8.0 12.0 Q3

REG104GA-3.3/2K5 SOT-223 DCQ 6 2500 330.0 12.4 6.8 7.3 1.88 8.0 12.0 Q3

REG104GA-5/2K5 SOT-223 DCQ 6 2500 330.0 12.4 6.8 7.3 1.88 8.0 12.0 Q3

PACKAGE MATERIALS INFORMATION

www.ti.com 17-Aug-2012

Pack Materials-Page 1

Device Package

Type Package

Drawing Pins SPQ Reel

Diameter

(mm)

Reel

Width

W1 (mm)

(mm) B0

(mm) K0

(mm) P1

(mm) W

(mm) Pin1

Quadrant

REG104GA-A/2K5 SOT-223 DCQ 6 2500 330.0 12.4 6.8 7.3 1.88 8.0 12.0 Q3

*All dimensions are nominal

Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm)

REG104FA-2.5/500 DDPAK/TO-263 KTT 5 500 367.0 367.0 45.0

REG104FA-2.5KTTT DDPAK/TO-263 KTT 5 50 367.0 367.0 45.0

REG104FA-3.3/500 DDPAK/TO-263 KTT 5 500 367.0 367.0 45.0

REG104FA-3.3KTTT DDPAK/TO-263 KTT 5 50 367.0 367.0 45.0

REG104FA-3KTTT DDPAK/TO-263 KTT 5 50 367.0 367.0 45.0

REG104FA-5/500 DDPAK/TO-263 KTT 5 500 367.0 367.0 45.0

REG104FA-5KTTT DDPAK/TO-263 KTT 5 50 367.0 367.0 45.0

REG104FA-A/500 DDPAK/TO-263 KTT 5 500 367.0 367.0 45.0

REG104FA-AKTTT DDPAK/TO-263 KTT 5 50 367.0 367.0 45.0

REG104GA-2.5/2K5 SOT-223 DCQ 6 2500 358.0 335.0 35.0

REG104GA-3.3/2K5 SOT-223 DCQ 6 2500 358.0 335.0 35.0

REG104GA-5/2K5 SOT-223 DCQ 6 2500 358.0 335.0 35.0

REG104GA-A/2K5 SOT-223 DCQ 6 2500 358.0 335.0 35.0

PACKAGE MATERIALS INFORMATION

www.ti.com 17-Aug-2012

Pack Materials-Page 2

IMPORTANT NOTICE

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