Document
Features
Switching Regulator
• Low cost switching regulator • High start-up current capability • Efficiency up to 95% • Short circuit protection • Pin compatible with 78 series regulators • Non isolated DC-DC converter • IEC/EN60950-1+ AM2 certified
DC/DC Converter
R-78E-0.5
Description
The R-78E series is a switching regulator module that has been designed to offer all the advantages of a switching regulator (high efficiency, wide input range, accurate output voltage regulation) but with a low cost for production quantities. Due to the R-78E’s high efficiency of up to 95% no heat-sink is required. The compact TO-220 compatible SIP3 package measures only 11.6 x 8.5 x 10.4mm, so it saves precious board space.
Selection Guide
Part Number
Input Voltage Range
[VDC]
R-78E3.3-0.5
6-28
R-78E5.0-0.5
7-28
R-78E9.0-0.5 12-28
R-78E12-0.5
15-28
R-78E15-0.5
18-28
Output Voltage [VDC]
3.3
5
9
12
15
Output Current
[A] 0.5
0.5
0.5
0.5
0.5
Efficiency (1)
max. Capacitive
@ min. Vin @ max. Vin Load (2)
[%]
[%]
[µF]
88
75
220
92
82
220
94
89
220
95
92
220
95
93
220
Notes: Note1: Efficiency is tested at full load at +25°C ambient Note2: Max. Cap Load is tested by nominal input and full resistive load
Model Numbering
R-78E__-0.5
Output Voltage
Output Current
0.5 Amp SIP3
3
Single Output
RE CTS
RE CTS
ERS CO
ERS CO
COM CONVERT
RoHS 2+
compliant 10 from 10
M PLIANT PRODU
COM CONVERT
REACH
compliant
M PLIANT PRODU
IEC60950-1 certified EN60950-1 certified
Specifications (measured @ Ta= 25°C, full load, nominal input voltage and after warm-up)
BASIC CHARACTERISTICS
Parameter
Condition
Input Voltage Range
nom. Vin = 24VDC
Quiescent Current
Minimum Load (3)
Internal Operating Frequency
Output Ripple and Noise (4)
20MHz BW
3.3, 5, 9Vout 12, 15Vout
Min.
Typ.
Max.
6VDC
24VDC 28VDC
1.5mA
2%
570kHz
50mVp-p 70mVp-p
Notes: Note3: recommend to use with more than 2% load, if not, the ripple of the product may exceeds the specification, but doesn’t affect the reliability of the product Note4: Measurements are made with a 100nF MLCC across output (low ESR)
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REV.: 7/2021
I-1
R-78E-0.5
DC/DC Converter
Specifications (measured @ Ta= 25°C, full load, nominal input voltage and after warm-up)
Series
Efficiency vs Load
Efficiency [%]
R-78E5.0-0.5
100
90
80
70
60
50
40
30
7Vin
20
12Vin
24Vin
10
28Vin
0 0 10 20 30 40 50 60 70 80 90 100
Output Load [%]
REGULATIONS Parameter
Output Accuracy Line Regulation Load Regulation
PROTECTIONS Parameter
Short Circuit Protection (SCP)
ENVIRONMENTAL Parameter
Operating Temperature Range Maximum Case Temperature Vibration MTBF Derating Graph
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Output Load [%]
Condition low line to high line, full load
10% to 100% load
Condition
Condition natural convection and with derating (see graph)
according to MIL-HDBK-217F, G.B.
+25°C +70°C
100 90 80 70 60 50 40 30 20 10 0
-40 -30 -20 -10 0 10 20 30 40 50 60 .