Datasheet
PA-1
REV.: 1/2016www.recom-power.com
DC/DC Converter
3
Y
E
A
R
w
a
r
r
a
n
t
y
3
Specifications (measured at T
A
= 25°C, full load, nominal input voltage and after warm-up)
BASIC CHARACTERISTICS
Parameter Condition Min. Typ. Max.
Input Voltage Range 6.5VDC 24VDC 32VDC
Output Current
(2)
6mA 500mA
Quiescent Current 0% Load 5mA 7mA
Internal Operating Frequency 280kHz 330kHz 380kHz
Efficiency see Selection Guide
Internal Power Dissipation
0.4W
Output Ripple and Noise
20MHz BW limited 50mVp-p 75mVp-p
Description
The R-78W series offers wired 0.5A switching regulators which are ideally suited to offer a stable
voltage supply without the need for a PCB for applications like high power LED lighting, battery
powered systems, cooling systems, or fans. Due to the high efficiencies of up to 96% there is no
need for a heat sink. The compact modules feature fully protected outputs and draw only 1mA under
no load conditions.
Features
Switching
Regulator
• Efficiency up to 96%, no need for heatsinks!
• Build-in Diode Protection Circuit
• Low Profie (LxWxH= 11.5 x 8.5 x 17.5mm)
• Continuous Short Circuit Protection
• RoHS compliant
• IEC/EN-60950 Certified
0.5 AMP
SIP3
Single
Output
R-78W-0.5
Selection Guide
Part Input Output Output Efficiency Max. Capacitive
Number Voltage Range Voltage Current @ min. Vin Load
(1)
(VDC) (VDC) (mA) (%) (µF)
R-78W3.3-0.5 6.5 - 32 3.3 500 88 220
R-78W5.0-0.5 6.5 - 32 5.0 500 93 220
R-78W9.0-0.5 11 - 32 9.0 500 95 220
R-78W12-0.5 15 - 32 12.0 500 96 220
Notes:
Note2: Operation under no load will not damage the device, however they may not meet all
specifications. A minimum load of 6mA is recommended.
Notes:
Note1: 6800µF with <1sec start-up time
REGULATIONS
Parameter Condition Type Value
Output Accuracy
all models ±2% typ. / ±3% max.
Line Voltage Regulation low line to high line, full load
3.3V, 5V
9V, 12V
±0.2% typ. / ±0.4% max.
±0.1% typ. / ±0.2% max.
Load Voltage Regulation 10% to 100% load
3.3V, 5V
9V, 12V
±0.4% typ. / ±0.6% max.
±0.25% typ. / ±0.4% max.
Transient Response
50% - 100% Load, ΔIo/Δt 25mA/µs
10% - 100% Load, ΔIo/Δt 25mA/µs
all models
±75mV typ.
±100mV max.
IEC-60950-1 Certified
EN-60950-1 Certified