• Efficiency Up To 96%, No Heatsinks Required
• 2A Continuous Output Current
• Vin Up To 32V
Features
DC/DC Converter
• Vout: 1.2V - 15V
• Wide Operating Temperature -40°C to +70°C at Full Load
• S/C And Over-temperature Protection
• Pin Compatible With TO220 Linear Regulators
• Positive To Negative
Switching
Regulator
R-78B-2.0
2.0 Amp
SIP3
Description
The R-78Bxx-2.0 series high efficiency switching regulators are ideally suited to replace 78xx linear
regulators and are pin compatible. The efficiency of up to 96% means that very little energy is wasted
as heat. Full power is available over a temperature range of -40°C up to 70°C without the need for
heatsinks with their additional space and mounting costs. A high input voltage of up to 32VDC and
output voltages from 1.2V up to 15V, low ripple and noise figures and a short circuit input current of
typically only 10mA round off the specifications of this versatile converter series.
3
Single Output
Selection Guide
Part
Number
Input
Output
Output
Efficiency @ full load
Max. Capacitive
Load (1)
Voltage Range Voltage
Current @ min Vin @ max. Vin
[VDC]
[VDC]
1.2
1.5
1.8
2.5
3.3
5
9
12
15
[mA]
2000
2000
2000
2000
2000
2000
2000
2000
2000
[%]
72
79
80
84
86
90
93
94
95
[%]
87
90
91
92
92
94
95
96
96
[µF]
R-78B1.2-2.0
R-78B1.5-2.0
R-78B1.8-2.0
R-78B2.5-2.0
R-78B3.3-2.0
R-78B5.0-2.0
R-78B9.0-2.0
R-78B12-2.0
R-78B15-2.0
4.75 - 32
4.75 - 32
4.75 - 32
4.75 - 32
4.75 - 32
6.5 - 32
11 - 32
3300
3300
3300
2300
1800
820
620
470
470
15 - 32
18 - 32
Notes:
Note1: Max. cap load is tested by nominal input and full resisitive load
IEC/EN62368-1 (pending)
CB Report (pending)
EN55022 Compliant
Specifications (measured @ ta= 25°C, nom. Vin, full load and after warm up unless otherwise specified)
BASIC CHARACTERISTICS
Parameter
Condition
Min.
Typ.
Max.
32VDC
0V
1.2Vout - 3.3Vout
4.75VDC
6.5VDC
11VDC
15VDC
18VDC
5Vout
9Vout
12Vout
15Vout
Input Voltage Range
nom. Vin= 24VDC
24VDC
Maximum Reverse Voltage
Inrush Current
2A
2mA
Quiescent Current
Internal Power Dissipation
Start-up time
nom. Vin= 24VDC
Vout= 1.5VDC
0.35W
10ms
50µs
460kHz
0%
0.8W
Rise Time
Internal Operating Frequency
Minimum Load
nom. Vin= 24VDC
Vout ≤3.3VDC
Vout ≥5VDC
50mVp-p
75mVp-p
Output Ripple and Noise
20MHz BW
continued on next page
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REV.: 0/2017
I-1
RECOM [ RECOM INTERNATIONAL POWER ]
