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R-78B3.3-1.0 Datasheet Preview

R-78B3.3-1.0 Datasheet

DC/DC-Converter

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Features
Switching
Regulator
• Efficiency up to 97%, no heatsinks required
• Pin compatible with LM78XX linears
• Low profile (L/W/H=11.5 x 8.5 x 17.5mm)
• Wide input range
• Short circuit protection, thermal shutdown
• Low ripple and noise
• „L“ version with 90° pins
DC/DC Converter
R-78B-1.0(L)
Description
The R-78Bxx-1.0 series high efficiency switching regulators are ideally suited to replace 78xx
linear regulators and are pin compatible. The efficiency of up to 97% 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.
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 10mA
round off the specifications of this versatile converter series.
Selection Guide
Part
Number
Input
Voltage Range
[VDC]
Output
Voltage
[VDC]
R-78B1.5-1.0 (1)
4.75 - 26
1.5
R-78B1.8-1.0 (1)
4.75 - 26
1.8
R-78B2.5-1.0 (1) 4.75 - 32
2.5
R-78B3.3-1.0 (1)
4.75 - 32 3.3
R-78B5.0-1.0 (1)
6.5 - 32 5.0
R-78B6.5-1.0 (1)
9.0 - 32 6.5
R-78B9.0-1.0 (1)
12 - 32 9.0
R-78B12-1.0 (1)
16 - 32 12
R-78B15-1.0 (1)
20 - 32 15
Output Efficiency
Current
@ min Vin @ max. Vin
[A]
[%] [%]
1.0 77 71
1.0 80 74
1.0 85 78
1.0
89 83
1.0
93 88
1.0
94 90
1.0
95 93
1.0
96 95
1.0
97 96
1.0 Amp
SIP3
Single Output
Model Numbering
R-78B__-1.0(L)
Output Voltage
Pinning
Output Current
Notes:
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.
Absolute Maximum Input
Voltage
1.5Vout , 1.8Vout
2.5Vout to 15Vout
26VDC
34VDC
Quiescent Current
nom. Vin= 24VDC
5mA 7mA
Internal Power Dissipation
Vout= 1.5VDC
0.65W
Internal Operating Frequency
nom. Vin= 24VDC
280kHz 330kHz 380kHz
Minimum Load (2)
0%
Output Ripple and Noise (3)
20MHz BW
1.5Vout to 6.5Vout
9Vout to 15Vout
15mVp-p 20mVp-p
25mVp-p 35mVp-p
Ref. Back Ripple Current
150mA 200mAp-p
Absolute Maximum
1 second start up, no external components
470µF
Capacitive Load
<1 second start up + diode protection circuit
6800µF
Notes:
Note2: Operation under no load will not harm the converter, but specifications may not be met
A minimum load of 10mA is recommended
Note3: Output Ripple and Noise is tested from 10% to 100% load
continued on next page
EN55032 compliant
IEC/EN60950-1 certified
www.recom-power.com
REV.: 4/2019
I-1




Recom

R-78B3.3-1.0 Datasheet Preview

R-78B3.3-1.0 Datasheet

DC/DC-Converter

No Preview Available !

R-78Bxx-1.0(L)
DC/DC Converter
Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)
Series
Efficiency vs. Vin (full load)
100
90
80
70
60
50
40
30
20
10
0
4.75
15Vout
12Vout
9Vout
6.5Vout
5Vout
9 13 17 21
Input Voltage [VDC]
3.3Vout
2.5Vout
1.8Vout
1.5Vout
25 29 32
Ripple vs. Vin (full load)
50
15Vout
3.3Vout
45
12, 9Vout
6.5Vout
2.5Vout
1.8, 1.5Vout
40 5Vout
35
30
25
20
15
10
5
0
4.75 9 13 17 21
Input Voltage [VDC]
25
29 32
Efficiency vs. Load (max. Vin)
100
90
80
70
60
50
40
30
20
10
0
0
15Vout
12Vout
9Vout
6.5Vout
5Vout
3.3Vout
2.5Vout
1.8Vout
1.5Vout
10 20 30 40 50 60 70 80 90 100
Output Load [%]
Ripple vs. Load (max. Vin)
50
15Vout
3.3Vout
45
12, 9Vout
6.5Vout
2.5Vout
1.8, 1.5Vout
40 5Vout
35
30
25
20
15
10
5
0
0 10 20 30 40 50 60 70 80 90 100
Output Load [%]
Efficiency vs. Load (min. Vin)
100
90
80
70
60
50
40
30
20
10
0
0
15Vout
12Vout
9, 6.5Vout
5Vout
3.3Vout
2.5Vout
1.8Vout
1.5Vout
10 20 30 40 50 60 70 80 90 100
Output Load [%]
Ripple vs. Load (min. Vin)
50 15, 12, 9Vout
45
6.5Vout
2.5, 3.3, 5Vout
40 1.5, 18Vout
35
30
25
20
15
10
5
0
0 10 20 30 40 50 60 70 80 90 100
Output Load [%]
www.recom-power.com
REV.: 4/2019
I-2


Part Number R-78B3.3-1.0
Description DC/DC-Converter
Maker Recom
Total Page 7 Pages
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