Features
Switching
Regulator
• Efficiency up to 96%, no heatsinks required
• Pin-out compatible with LM78XX linears
• Low profile (L/W/H=11.5 x 8.5 x 17.5mm)
• High input voltage range, up to 72V
• Short circuit protection, thermal shutdown
• Low ripple and noise
• „L“ version with 90° pins
DC/DC Converter
R-78HB-0.5(L)
Description
The R-78HBxx-Series high efficiency, high input voltage 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 so there is no need for any heat sinks with their additional space and mounting costs.
An input voltage range of up to 8:1 is unsurpassed by any other converter and allows the full stored
energy utilization of standard and high voltage batteries. The fully protected output is ideal for industrial
applications (especially for industry standard 24VDC bus supplies) and 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 15mA round off the specifications of
this versatile converter series. Typical applications include telecommunication, automotive, industrial,
aerospace and battery powered applications.
0.5 Amp
SIP3
Single Output
Selection Guide
Part
Number
R-78HB3.3-0.5
R-78HB5.0-0.5
R-78HB6.5-0.5
R-78HB9.0-0.5
R-78HB12-0.5
R-78HB15-0.5
R-78HB24-0.3
Input
Output
Voltage Range Voltage
[VDC] [VDC]
9 - 72 3.3
9 - 72 5.0
9 - 72 6.5
14 - 72 9.0
17 - 72 12
20 - 72 15
36 - 72 24
Output Efficiency
Current
@ min Vin @ max. Vin
[A] [%] [%]
0.5 82 76
0.5 87 81
0.5 91 84
0.5 92 86
0.5 94 89
0.5 95 91
0.3 96 92
Model Numbering
R-78HB__- (L)
Output Voltage
Pinning (1)
Notes:
Output Current
Note1: add suffix „L” for 90° bent pins, e.g. R-78B5.0-1.0L
Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)
BASIC CHARACTERISTICS
Parameter
Condition
Min. Typ. Max.
Internal Input Filter
1µF capacitor
Absolute Maximum Input Voltage
75VDC
Quiescent Current
nom. Vin= 48VDC
1mA 5mA
Internal Power Dissipation
0.65W
Minimum Load (2)
2%
Notes:
Note2: Operation under no load will not harm the converter, but specifications may not be met
A minimum load of 10mA is recommended
continued on next page
IEC/EN60950-1 certified
EN55032 compliant
www.recom-power.com
REV.: 5/2019
I-1