Datasheet

www.recom-power.com
REV.: 5/2019 I-2
DC/DC Converter
R-78xx-0.5
Series
BASIC CHARACTERISTICS
Parameter Condition Min. Typ. Max.
Absolute Maximum Input Voltage 34VDC
Quiescent Current nom. Vin= 24VDC
5mA 7mA
Internal Power Dissipation
0.4W
Minimum Load
(3)
0%
Internal Operating Frequency
280kHz 330kHz 380kHz
Output Ripple and Noise
20MHz BW, without output
capacitor
1.5 - 6.5VDC
9 - 15.5VDC
20mVp-p
30mVp-p
30mVp-p
40mVp-p
20MHz BW
(4)
1.5VDC
1.8 - 15.5VDC
15mVp-p
25mVp-p
20mVp-p
35mVp-p
Absolute Maximum
Capacitive Load
1 second start up, no external components 220µF
<1 second start up + diode protection circuit 6800µF
continued on next page
Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)
Efficiency vs. Vin (full load)
Efficiency vs. Load (max. Vin)
Ripple vs. Vin (full load)
Ripple vs. Load (nom. Vin)
0 5 10 15 20 25 30 34
100
80
60
40
90
70
50
30
20
10
0
Efficiency [%]
Input Voltage [VDC]
15, 12Vout
9Vout
5Vout
3.3Vout
1.8Vout
1.5Vout
0 10 20 30 40 50 60 70 80 90 100
100
80
60
40
90
70
50
30
20
10
0
Efficiency [%]
Output Load [%]
15Vout
12Vout
5Vout
3.3Vout
1.8Vout
1.5Vout
0 5 10 15 20 25 30 34
50
40
30
20
45
35
25
15
10
5
0
Ripple [mV]
Input Voltage [VDC]
15Vout
12Vout
9Vout
5Vout
3.3Vout
1.8Vout
1.5Vout
0 10 20 30 40 50 60 70 80 90 100
50
40
30
20
45
35
25
15
10
5
0
Ripple [mV]
Output Load [%]
15Vout
12Vout
9Vout
5Vout
3.3Vout
1.8Vout
1.5Vout
Notes:
Note3: Operation under no load will not harm the converter, but specifications may not be met
A minimum load of 6mA is recommended
Note4: Measurements are made with a 100nF MLCC across output (low ESR)