www.recom-power.com REV.: 5/2020 I-1
R-78B-1.5(L)
DC/DC Converter
1.5 Amp
SIP3
Single Output
EN55032 compliant
IEC/EN60950-1 certified
R-78B-2.0 Series
PREFERRED ALTERNATIVES
Please consider these alternatives:
Features
Switching
Regulator
• Efficiency up to 95%, no heatsinks required
• Pin compatible with LM78XX linears
• Low profile (L/W/H=11.5 x 8.5 x 17.5mm)
• Wide input range
• Short circuit protection, thermal shutdown
• Low ripple and noise
• „L“ version with 90° pins
Description
The R-78Bxx-1.5 series high efficiency switching regulators are ideally suited to replace 78xx
linear regulators and are pin compatible. The efficiency of up to 95% means that very little energy is
wasted as heat so there is no need for any heat sinks with their additional space and mounting costs.
The L-Version with 90° pins allows direct replacement for laid-flat regulators where component height is
at a premium. Low ripple and noise figures and a short circuit input current of typically only 10mA round
off the specifications of this versatile converter series.
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A
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a
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r
a
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y
3
R
E
C
O
M
C
O
N
V
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R
T
E
R
S
C
O
M
P
L
I
A
N
T
P
R
O
D
U
C
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S
RoHS
2
+
compliant
10 from 10
R
E
C
O
M
C
O
N
V
E
R
T
E
R
S
C
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P
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REACH
compliant
BASIC CHARACTERISTICS
Parameter Condition Min. Typ. Max.
Quiescent Current nom. Vin= 12VDC 7mA 9mA
Internal Power Dissipation Vout= 1.5VDC 0.65W
Internal Operating Frequency
nom. Vin= 12VDC 300kHz 340kHz 380kHz
Minimum Load (2) 0%
Output Ripple and Noise (3) 20MHz BW 15mVp-p 30mVp-p
Ref. Back Ripple Current
150mAp-p
200mAp-p
Absolute Maximum
Capacitive Load
1 second start up, no external components
<1 second start up + diode protection circuit
1000µF
6800µF
continued on next page
Selection Guide
Part Input Output Output Efficiency
Number Voltage Range Voltage Current @ min Vin @ max. Vin
[VDC] [VDC] [A] [%] [%]
R-78B3.3-1.5 (1) 4.75 - 18 3.3 1.5 91 88
R-78B5.0-1.5 (1) 6.5 - 18 5.0 1.5 94 92
R-78B6.5-1.5 (1) 8.0 - 18 6.5 1.5 95 93
Selection Guide (NRND, last time buy: 16th Nov 2020)
Part Input Output Output Efficiency
Number Voltage Range Voltage Current @ min Vin @ max. Vin
[VDC] [VDC] [A] [%] [%]
R-78B1.5-1.5 (1) 4.75 - 18 1.5 1.5 83 78
R-78B1.8-1.5 (1) 4.75 - 18 1.8 1.5 85 81
R-78B2.5-1.5 (1) 4.75 - 18 2.5 1.5 88 84
Notes:
Note1: add suffix “L” for 90° bent pins, e.g. R-78B5.0-1.5L
Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)
Model Numbering
Output Voltage Pinning
Output Current
R-78B__-1.5(L)
Notes:
Note2: Operation under no load will not harm the converter, but specifications may not be met
A minimum load of 10mA is recommended
Note3: Output Ripple and Noise is tested from 10% to 100% load