DEMO MANUAL SCP-LT3463-EVALZ
Rev. 0
1
DESCRIPTION
Demonstration circuit SCP-LT3463-EVALZ is a dual output
DC-DC converter designed to create a dual polarity regu-
lated voltage for powering several signal chains. The pos-
itive regulator is a boost converter (with 20V output) while
the other is an inverting charge pump (with –20V output).
Like all boards in the Signal Chain Power series, this board
is designed to be easily plugged into other SCP boards to
form a complete signal chain power system, enabling fast
evaluation of low power signal chains. To evaluate this
board, some universal SCP hardware is required, namely:
SCP-INPUT-EVALZ SCP-FILTER-EVALZ
SCP-OUTPUT-EVALZ SCP-1X2BKOUT-EVALZ
SCP-1X5BKOUT-EVALZ SCP-5X1-EVALZ
SCP-THRUBRD-EVALZ
To properly evaluate SCP series demo boards, you will
need the SCP Configurator companion software. SCP
Configurator can help you choose the right board and to-
pology for your design.
Note that this Demo Manual does not cover details im-
portant to the operation and configuration regarding the
LT3463. Please refer to the LT 3 4 6 3 d a t a s h e e t for a com-
plete description of the part.
Design files for this circuit board are available.
All registered trademarks and trademarks are property of their respective owners.
Table 1.
Performance Summary.
SYMBOL
PARAMETER
NOTES
MIN
TYP
MAX
UNITS
V
IN(MAX)
Max Input Voltage
15
V
V
OUT(MAX)
Max Output Voltage
Positive V
OUT
Negative V
OUT
+40
–40
V
V
I
SW(LIM)
Switch Current Limit
180
250
320
mA
BOARD IMAGE
Figure 1. SCP-LT 3 4 6 3 -EVALZ Board
DEMO MANUAL SCP-LT3463-EVALZ
Rev. 0
2
QUICK START PROCEDURE
Demonstration circuit
SCP-LT3463-EVALZ
is easy to set
up to evaluate the performance of any SCP hardware
configuration.
1. The SCP-LT3463-EVALZ ships with default output volt-
ages of 20V and –20V, respectively. To change the out-
put voltage, see “Configuration Settings” section, and
modify the board accordingly. Be sure to check for open
connections or solder shorts after making any modifi-
cations.
2. Connect the SCP-INPUT-EVALZ and SCP-OUTPUT-
EVALZ boards to the SCP-LT3463-EVALZ (refer to Fig-
ure 2) and connect the input board to a voltage source,
V
SOURCE
. Connect the output board to a voltmeter or
dynamic load. Slowly raise the input voltage until the
SCP-LT3463-EVALZ powers up into regulation and
sweep V
SOURCE
through the desired range of operation.
NOTE: Make sure that the input voltage is always within
spec. If using a dynamic load to measure output volt-
age, make sure the load is initially set to zero.
3. Check for proper output voltages. The output should be
regulated at the programmed value (±5%).
4. Once the proper output voltage is established, power
off V
SOURCE
and similarly test other boards in the SCP
system until all elements have been individually verified
prior to assembling into the final circuit configuration.
NOTE: When measuring the input or output voltage rip-
ple, use the optional SMA connector locations available
on the input, output, 1
´
5, 1
´
2, and 5
´
1 breakout
boards. Avoid using the test point connections with
long scope leads.
Figure 2. Proper Measurement Equipment Setup (Use SMA connectors for Measuring Input or Output Ripple)
DEMO MANUAL SCP-LT3463-EVALZ
Rev. 0
3
CONFIGURATION SETTINGS
Demonstration circuit SCP-LT3463-EVALZ is a dual output
DC-DC converter designed to create a dual polarity regu-
lated voltage for powering several signal chains. The pos-
itive regulator is a boost converter (with 20V output) while
the other is an inverting charge pump (with –20V output).
Each output of the SCP-LT3463-EVALZ is resistor-pro-
grammable from |5V| to |40V|. The board can be also con-
figured to drive VIOC-capable linear regulators.
OUTPUT VOLTAGE PROGRAMMING
!
!
Table 2.
Resistor Selection Guide for Common Output Voltages
|V
OUT
| (V)
R1
(Ω)
R2
(Ω)
R3
(Ω)
R4
(Ω)
5.0
200k
66.5k
49.9k
200k
5.5
340k
100k
76.8k
340k
6.0
523k
137k
110k
523k
6.5
261k
61.9k
49.9k
261k
7.0
1.07M
232k
191k
1.07M
7.5
590k
118k
97.6k
590k
8.0
1.0M
187k
154k
1.0M
8.5
340k
59k
49.9k
340k
9.0
806k
130k
113k
806k
9.5
1.07M
162k
140k
1.07M
10.0
931k
133k
115k
931k
11.0
1.07M
137k
121k
1.07M
12.0
1.18M
137k
124k
1.18M
13.0
1.87M
200k
178k
1.87M
14.0
1.02M
100k
90.9k
1.02M
15.0
1.0M
90.9k
82.5k
1.0M
16.0
1.18M
100k
93.1k
1.18M
17.0
1.15M
90.9k
84.5k
1.15M
18.0
2.21M
165k
154k
2.21M
19.0
1.02M
71.5k
66.5k
1.02M
20.0
1.0M
66.5k
61.9k
1.0M
24.0
1.82M
100k
95.3k
1.82M
30.0
1.21M
52.3k
49.9k
1.21M
36.0
1.43M
51.1k
49.9k
1.43M
40.0
1.69M
54.9k
49.9k
1.62M
SHDN
PIN CONFIGURATION
The
SHDN
pins (
SHDN1
and
SHDN2
) are tied to the op-
tional SCP Run/Sequence headers P1 and P2. To create a
harness for this function, use Molex part 0510650300
with crimp pin 50212-8000.
To use an active run signal, use a 100k
W
resistor for either
pull-up or pull-down resistors R9, R10, R12 and R13,
short R11 and R14 with 0
W
, respectively, and use the
drive signal from connectors P1 and P2.
VOLTAGE INPUT-TO-OUTPUT CONTROL (VIOC)
IMPLEMENTATION
To implement the VIOC function for both regulators, set
R6 and R8
to 0
W
, respectively. Refer to the “Configuration
Settings” section in the Demo Manual for the low-dropout
(LDO) linear regulator board and use the following config-
uration for this board.
Table 3.
VIOC Cross-Reference Designators
VIOC SETTING REFERENCES
R
BOT
R
TOP
R
MAX
V
OUT
Reference Designators for V
OUT1
R2
R1
R5
V
OUT
Reference Designators for V
OUT2
R3
R4
R7
Positive VIOC Equations
!
!
I
SINK
is the current through R
MAX
which is typically 15µA.
Since the divider current is fixed due to the internal low
side gain setting feedback resistor and is less than the rec-
ommended divider current of 100µA, the effect of the sink
current on the maximum linear regulator input voltage
cannot not be mitigated and should be taken into consid-
eration.
+VOUT =1 .2 5 V 1 +R1
R2
⎛
⎝
⎜⎞
⎠
⎟
−VOUT =1 .2 5 V R4
R3
⎛
⎝
⎜⎞
⎠
⎟
VL DOIN −VL DOOUT =VVIOC =1 .2 5 V RBOT +RTOP
RBOT
⎛
⎝
⎜⎞
⎠
⎟
VMAX
( )
LDOIN =1 .2 5 V RBOT +RTOP +RMAX
RBOT
⎛
⎝
⎜⎞
⎠
⎟+ISINKRMAX
DEMO MANUAL SCP-LT3463-EVALZ
Rev. 0
4
Negative VIOC Equations
!
!
Because the V
LDOIN
term is simply the sum of the final
output voltage after the LDO and the difference the LT3463
is adding on top, it can be helpful to take the desired final
output voltage, add 1.0V, a n d t h e n l o o k u p t h a t v o l t a g e -
resistor combination from Table 2.
R
MAX
can then be obtained by figuring out the difference
between the maximum and nominal output voltage of the
LT 3 4 6 3 , d i v i d e d b y t h e c u r r e n t t h r o u g h t h e i n t e r n a l R
BOT
resistor, which is 1.25/R
BOT
.
! !
VL DOIN −VL DOOUT =VVIOC =−1 .2 5 V RTOP
RBOT
⎛
⎝
⎜⎞
⎠
⎟
VMAX
( )
L DOIN =−1 .2 5 RTOP +RMAX
RBOT
⎛
⎝
⎜⎞
⎠
⎟+VVIOC
RMAX
4 0 k
⎛
⎝
⎜⎞
⎠
⎟
DEMO MANUAL SCP-LT3463-EVALZ
Rev. 0
5
PARTS LIST
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
1
1
PCB
PRINTED CIRCUIT BOARD
ANALOG DEVICES 08_060170a
2
1
C1
CAP 4.7uF 25V CER X5R 0805
SAMSUNG CL21A475KAQNNNG
3
2
C9, C10
CAP MLCC 0603 (Note 1)
N/A
4
2
C2, C3
CAP 1uF 50V CER X7R 0805
SAMSUNG CL21B105KBFNNNE
5
1
C4
CAP 0.1uF 100V CER X7R 0603
SAMSUNG CL10B104KC8NNNC
6
3
C5, C6, C7
CAP MLCC 0805 (Note 1)
N/A
7
1
C8
CAP 10pF 50V CER NP0 0805
AVX 08055A100JAT2A
8
1
D1
DIODE SCHOTTKY BARRIER RECTIFIER
DIODES INC B0540W-7-F
9
1
INPUT
CONN MALE 3POS 2.54MM PITCH R/A
SULLINS PBC03SBAN
10
2
L1, L2
IND 10uH 0.45A 0.39-OHM
MURATA LQH32CN100K53L
11
2
OUTPUT+,
OUTPUT-
CONN FEMALE 3POS 2.54MM PITCH R/A
SULLINS PPPC031LGBN-RC
12
2
P1, P2
CONN-PCB 3POS HEADER WIRE TO BRD WAFER ASSY
STRAIGHT 2MM PITCH
MOLEX 53253-0370
13
2
R1, R4
RES 4.53M 1% THICK FILM 0805
VISHAY CRCW08054M53FKEA
14
6
R6, R8, R10, R11,
R13, R14
RES THICK FILM 0805 (Note 1)
N/A
15
4
R5, R7, R9, R12
RES 0-OHM 1% THICK FILM 0805
VISHAY CRCW08050000Z0EA
16
1
R2
RES 301K 1% THICK FILM 0805
PANASONIC ERA-6AEB3013V
17
1
R3
RES 280K 1% THICK FILM 0805
PANASONIC ERA-6AEB2803V
18
1
U1
IC DUAL MICROPOWER DC/DC CONVERTER WITH SCHOTTKY
DIODES
ANALOG DEVICES LT3463AEDD#PBF
19
2
VIOC+, VIOC-
CONN FEMALE 2POS 2.54MM PITCH R/A
SULLINS PPPC021LGBN-RC
Note 1.
These items are not stuffed (DNI).
DEMO MANUAL SCP-LT3463-EVALZ
Rev. 0
6
SCHEMATIC DIAGRAM
LT3463
53253-0370
2 2
<DESIGN_VIEW>
: n/a
Product(s): LT3463
HW TYPE : Customer Evaluation
1:1
A
02_060170
A SERQUINA
DNI
LT3463AEDD#PBF
DNI
280K
DNI
PBC03SBAN
53253-0370
DNI
DNI
10UH
DNI
50V
DNI
0
301K
0
1UF
10PF
PPPC031LGBN-RC
4.53MEG
0
10UH
DNI
0.1UF
10 0V
B0540W-7-F
PPPC021LGBN-RC
50V PPPC031LGBN-RC
DNI
DNI
4.53MEG DNI
PPPC021LGBN-RC
DNI1UF
50V
0
DNI
4.7UF
25V
C8
P1
INP UT
C1
R 9
R11
R12
R14
P2
L1
L2 C4
OU TPUT +
C2
VIO C+
R5
R6
R7
U1
VIO C-
R8
OU TPUT-D1
C5
C6
C7
C3
R1 0
R13
R3
R2
R1
R4
C9
C10
VO-
VO+
VO-
VO+
1
2
3
1
2
3
1
2
3
1
2
3
1
2
5
10
6
PAD
9
8
2
4
3 1
7
1
2
1
2
3
GND
GND
GND
GND
GND
GND
FB1
SHDN1_N
SHDN2_N
VREF
FB2
D2SW2
VIN SW1 VOU T1
GND
GND
GND
GND
GND
D
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DEMO MANUAL SCP-LT3463-EVALZ
Rev. 0
7
Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog
Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications
subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
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Rev. 0
8
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© ANALOG DEVICES INC. 2020
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circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality.
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