RECOM R-78B2.5-1.0

Features
●
●
●
●
●
●
●
●
●
INNOLINE
Efficiency up to 97%,Non isolated,
no need for heatsinks
Pin-out compatible with LM78XX Linears
Low profile( L*W*H=11.5*8.5*17.5mm)
Wide input range.(4.75V ~ 34V)
Short circuit protection, Thermal shutdown
Non standard outputs available as specials
between 1.5V ~15V
Low ripple and noise
“L” version with 90° pins
See Positive to Negative Converter
Application Note for use as a voltage
inverter (alternative to LM79xx Linear)
DC/DC-Converter
R-78Bxx1.0(L)
Series
1.0 AMP
SIP3
Single Output
Selection Guide
Part
Number
SIP3
Input
Range (1)
(V)
Output
Voltage
(V)
Output
Current
(A)
Efficiency
Min. Vin
Max. Vin
(%)
(%)
R-78B1.5-1.0
4.75 – 26
1.5
1.0
77
71
R-78B1.8-1.0
4.75 – 26
1.8
1.0
80
74
R-78B2.5-1.0
4.75 – 34
2.5
1.0
85
78
R-78B3.3-1.0
4.75 – 34
3.3
1.0
89
83
R-78B5.0-1.0
6.5 – 34
5.0
1.0
93
88
R-78B6.5-1.0
9.0 – 34
6.5
1.0
94
90
R-78B9.0-1.0
12 – 34
9.0
1.0
95
93
R-78B12-1.0
16 – 34
12
1.0
96
95
R-78B15-1.0
20 – 34
15
1.0
97
96
* add Suffix “L” for 90° bent pins, e.g. R-78B5.0-1.0L
Note 1: 1.5V, 1.8V Output can be unstable with Vin>26VDC
Description
Output Power (%)
The R-78Bxx-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.
Derating-Graph
(Ambient Temperature)
120
100
80
60
40
20
0
Safe Operating Area
-40
0
25
50
Operating Temperature (°C)
www.recom-international.com
13-February-2007
85
75
100
71
1
R-78Bxx-1.0
(L) Series
INNOLINE
DC/DC-Converter
Specifications (refer to the standard application circuit, Ta: 25°C, minimum load = 10%)
Characteristics
Input Voltage Range
Conditions
1.5V, 1.8V
2.5V to 15.5V
Min.
4.75
4.75
Output Voltage Range (for customized parts)
All Series
1.5
Output Current (see Note 2)
All Series
Output Current Limit
All Series
Short Circuit Input Current
All Series
Typ.
15.5V
0
1000mA
2000mA
10
30mA
Internal Power Dissipation
0.65W
Short Circuit Protection
Continuous, automatic recovery
Output Voltage Accuracy (At 100% Load)
Line Voltage Regulation (Vin = min. to max. at full load)
Ripple & Noise (without Output Capacitor)
(10% to 100% full load)
All Series
1.5V to 6.5V
9V to 15.5V
1.5V to 6.5V
9V to 15.5V
100% <-> 50% load
Transient Recovery Time
1.5V to 6.5V
9V to 15.5V
Temperature Coefficient
-40°C ~ +85°C ambient
Load Regulation (10% to 100% full load)
Dynamic Load Stability (with Output Capacitor=100µF)
±2
0.2
0.1
0.4
0.25
±100mV
1.0
15mVp-p
25mVp-p
220µF
Switching Frequency
280
Quiescent Current
Vin = min. to max. at 0% load
Input Reflected Ripple Current
All Series
Operating Temperature Range
330
5
150
-40°C
200mAp-p
+85°C
+100°C
Storage Temperature Range
-55°C
+125°C
Case Thermal Impendance
60°C / W
Thermal Shutdown
Internal IC junction
+160°C
Relative Humidity
(+71°C)
380kHz
7mA
Operating Case Temperature
.
±3%
0.4%
0.2%
0.6%
0.4%
±150mV
1.5ms
20mVp-p
35mVp-p
0.015%/°C
Max capacitance Load
MTBF (+25°C)
Max.
26.0V
34.0V
95% RH
}
Detailed Information see
Application Notes chapter "MTBF"
using MIL-HDBK 217F
6584 x 10³ hours
using MIL-HDBK 217F
1139 x 10³ hours
Note 2: Converter requires a minimum load of 6mA to start up properly. Once started, the load can be reduced to 0%.
Standard Application Circuit
+Vin
+Vout
R-78Bxx-1.0
C1
Add a blocking diode to
Vout if current can flow
backwards into the output, as this can damage
the converter..
C2
22µF
(Vin>30V)
100µF
(Option)
-Vin
-Vout
To protect the converter during power-up, use C1=22µF if Vin>30V
2
13-February-2007
www.recom-international.com
R-78Bxx-1.0
(L) Series
INNOLINE
DC/DC-Converter
Characteristics
Ripple
Efficiency
100
75
Vo=1.8V
Vo=1.5V
Vo=15V
Vo=12V
Vo=9V
Vo=6.5V
Vo=5V
Vo=3.3V
Vo=2.5V
50
Vo=15V
Vo=9V,12V
Vo=6.5V
Vo=5V
Vo=3.3V
Vo=2.5V
Vo=1.5V,1.8V
25
Ripple (mV)
Efficiency (%)
50
25
34
20
10
10
Vin ( V )
Efficiency Vs Vin (Full Load)
Ripple Vs Vin ( Full Load )
Vo=15V
Vo=12V
Vo=9V
Vo=6.5V
Vo=5V
Vo=3.3V
Vo=2.5V
Vo=1.8V
Vo=1.5V
100
75
50
Ripple (mV)
Efficiency (%)
Vo=15V
Vo=9V, 12V
Vo=6.5V
Vo=5V
Vo=3.3V
Vo=2.5V
Vo=1.5V, 1.8V
25
50
25
0.2
0.4
0.6
0.8
1.0
0.2
1.2
0.4
0.6
0.8
1.0
1.2
Output Current ( A )
Output Current ( A )
Ripple Vs Load ( Vin=Max )
Efficiency Vs Load ( Vin=Max )
Vo=15V
Vo=12V
Vo=9V, 6,5V
Vo=5V
Vo=3.3V
Vo=2.5V
Vo=1.8V
Vo=1.5V
100
75
50
25
Vo=9V,12V,15V
Vo=6.5V
Vo=2.5V,3.3V,5V
Vo=1.5V,1.8V
Ripple (mV)
50
Efficiency (%)
34
20
Vin ( V )
25
0.2
0.4
0.6
0.8
1.0
0.2
1.2
0.6
0.8
1.0
1.2
Output Current ( A )
Output Current ( A )
Ripple Vs Load ( Vin=Min )
Efficiency Vs Load ( Vin=Min )
www.recom-international.com
0.4
13-February-2007
3
R-78Bxx-1.0
(L) Series
INNOLINE
DC/DC-Converter
Application Examples
High efficiency multiple output
R-78B5.0-1.0
+Vin
[email protected]
RD-0512D
[email protected]
C1
C2
0V Com
-Vin
[email protected]
C1: optional, C2: required (further
decoupling filtering may be necessary - Wide input range 6.5V to 34V
between the two converters)
- +/-12V outputs for analogue circuits, e.g. instrumentation amplifier
- +5V output for digital circuits
Isolated, wide Input range, Distributed Power Architecture (Point of Load)
REC10-4812SRWZ/H
[email protected]
+Vin
R-78B5.0-1.0
[email protected]
C1
-Vin
C2
- High isolation voltage - 1.6kV
- Improved loading / line regulation
- Wide Input Voltage Range - 18~75V
- Point-of-Load Architecture
- C1 is required. Further decoupling filtering
may be necessary between the converters
C2,C3 : optional
R-78B3.3-1.0
[email protected]
C3
0V
Package Style and Pinning (mm)
3rd angle
projection
SIP3 PIN Package
8.50
8.50
17.5
RECOM
R-78B5.0-1.0
****
Pb
RECOM
R-78B5.0-1.0
****
0.51 typ.
1.50 max
0.7 typ.
4.10
Pb
4.10
Recommended Footprint Details
1.00 ø+0.15/–0
11.50
3.21
4
2.54
Bottom View
0.25
1 2 3
L - Version
5.08
2.0
Top View
Pin Connections
Pin #
1
+Vin
2
GND
3
+Vout
xx.x ±0.5mm
xx.xx ±0.25mm
2.54
13-February-2007
www.recom-international.com