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SRBA-03E1A0G

P1-P3P4-P6P7-P8
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input 0.75 Vdc - 5.0 Vdc/3 A Output
• Non-Isolated • OCP/SCP
• Fixed Frequency • Remote On/Off
• High Efficiency • Wide Trim Range
• High Power Density • Wide Input Range
• Under-voltage Lockout (UVLO) • Active Low/Active High (Option)
Description
The Bel SRBA-03E1Ax modules are a series of non-isolated dc/dc converters that deliver up to 3 A of output
current with full load efficiency of 93% at 5.0 Vdc output. These modules provide precisely regulated voltage
programmable via external resistor from 0.75 Vdc to 5.0 Vdc over a wide range of input voltage. Their open-
frame construction and small footprint enable designers to develop cost and space-efficient solutions. Standard
features include remote On/Off, programmable output voltage and over current protection.
Part Selection
Output
Voltage
Input
Voltage
Max. Output
Current
Max. Output
Power
Typical
Efficiency at 5.0V
Model Number
Active High
Model Number
Active Low
0.75 V - 5.0 V
1
4.5 V - 14 V 3 A 15 W 93% SRBA-03A1A0 SRBA-03A1AL
Notes: 1. These modules use a buck topology, so the output voltages must be 0.5 V less than the input voltage.
2. Add “G” to the end of the Model Number to indicate Tray Packaging.
3. All part numbers above indicate RoHS 6. Change the second letter "R" to "7" for RoHS 5 part numbers.
Absolute Maximum Ratings
Parameter Min Typ Max Notes
Input Voltage (continuous) -0.3 V - 15 V
Output Enable Terminal Voltage -0.3 V - 15 V
Ambient Temperature
-40 °C
-
85 °C
Storage Temperature
-55 °C
-
125 °C
Note: All specifications are typical at 25 °C unless otherwise stated.
Input Specifications
Parameter Min Typ Max Notes
Input Voltage
Vo set=5 V
Vo set≤3.3 V
7.0 V
4.5 V
12 V
12 V
14 V
14 V
Input Current (full load)
Vo=5.0 V
Vo=3.3 V
Vo=0.75 V
-
-
-
1.35 A
1.00 A
0.25 A
3.70 A
2.50 A
0.65 A
Input Current (no load)
Vo=5.0 V
Vo=3.3 V
Vo=0.75 V
-
-
-
65 mA
50 mA
15 mA
80 mA
60 mA
20 mA
Remote Off Input Current - 3 mA 6 mA
SRBA-03E1Ax RoHS Com
p
liant Rev.A
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input 0.75 Vdc - 5.0 Vdc/3 A Output
Input Specifications (continued)
Parameter Min Typ Max Notes
Input Reflected Ripple Current (pk-pk)
Vo=5.0 V
Vo=3.3 V
Vo=0.75 V
-
-
-
150 mA
100 mA
35 mA
200 mA
150 mA
45 mA
Input Reflected Ripple Current (rms)
Vo=5.0 V
Vo=3.3 V
Vo=0.75 V
-
-
-
30 mA
20 mA
8 mA
40 mA
35 mA
15 mA
Tested with simulated source
impedance of 1uH, 5 Hz to 20 MHz and
two 100 uF/25 V external input
Tantalum capacitors.
I
2
t Inrush Current Transient - 0.01 A
2
s 0.02 A
2
s
Turn-on Voltage Threshold
Vo set=5 V
Vo set≤3.3 V
-
-
5.5 V
4.3 V
6.5 V
4.5 V
Turn-off Voltage Threshold
Vo set=5 V
Vo set≤3.3 V
3.8 V
3.8 V
5.5 V
4.0 V
6.0 V
4.3 V
Output Specifications
Parameter Min Typ Max Notes
Output Voltage Set Point -2%Vo,set - 2%Vo,set Vin=12 V, lo=lomax
Output Voltage Set Point -3.5%Vo,set - 2.5%Vo,set
Over all operating input
voltage, resistive load, and
temperature conditions
Load Regulation 0.4%Vo,set 0.2%Vo,set 0.4%Vo,set lo=lomin to lomax
Line Regulation 0.4%Vo,set 0.3%Vo,set 0.4%Vo,set Vin=Vinmin to Vinmax
Regulation Over Temperature
(-40 °C to +85 °C)
- 0.5%Vo,set -
Output Current 0 A - 3 A
Current Limit Threshold 5 A - 9.5 A
Short Circuit Surge Transient - 0.1A
2
s 0.2 A
2
s
Ripple and Noise (pk-pk)
Vo=5.0 V
Vo=3.3 V
Vo=0.75 V
-
-
-
100 mV
80 mV
55 mV
120 mV
100 mV
80 mV
Ripple and Noise (rms)
Vo=5.0 V
Vo=3.3 V
Vo=0.75 V
-
-
-
30 mV
20 mV
15 mV
40 mV
30 mV
20 mV
Test conditions:
0-20 MHz BW, with external
10 uF/10 V Tantalum capacitor
and 1uF/10V ceramic capacitor
at the output.
Ripple and Noise (pk-pk)
Vo=5.0 V
Vo=3.3 V
Vo=0.75 V
-
-
-
60 mV
40 mV
20 mV
80 mV
50 mV
30 mV
Ripple and Noise
(rms)
Vo=5.0 V
Vo=3.3 V
Vo=0.75 V
-
-
-
15 mV
12 mV
5 mV
25 mV
20 mV
10 mV
Test conditions:
0-20 MHz BW, with external
10 uF/10 V Tantalum capacitor
1uF/10V ceramic capacitor and
two 22 uF/10 V ceramic
capacitors at the output.
Turn on Time - 8 mS 12 mS
Overshoot at Turn on - 0% 3%
Output Capacitance 0 uF - 1200 uF
Transient Response
50% ~ 100% Max Load - 150 mV 200 mV
Settling Time - 25 uS 40 uS
100% ~ 50% Max Load - 150 mV 200 mV
Settling Time
All
- 25 uS 40 uS
Test conditions: di/dt = 2.5 A/uS,
Vin=12 V, and with external
10 uF/10 V Tantalum capacitor and
1uF/10 V ceramic capacitor at the
output.
Note: All specifications are typical at nominal input (Vin=12 V), full load at 25 °C unless otherwise stated.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input 0.75 Vdc - 5.0 Vdc/3 A Output
General Specifications
Parameter Min Typ Max Notes
Efficiency
Vo=5.0 V
Vo=3.3 V
Vo=0.75 V
90%
88%
77%
93%
91%
80%
-
-
-
Measured at Vin=12 V, full load
Switching Frequency 200 kHz 230 kHz 250 kHz
Output Voltage Trim Range
(Wide Trim)
0.7525 V - 5 V
MTBF 6,350,000 hours
Calculated Per Bell Core SR-332 (I
O =
80% load; T
a = 25 °C)
Dimensions (Surface Mount)
Inches (L × W × H)
Millimeters
(
L × W × H
)
0.8 x 0.45 x 0.251
20.32 x 11.42 x 6.38
Weight - 2.5 g -
Note: All specifications are typical at 25 °C unless otherwise stated.
Control Specifications
Parameter Min Typ Max Notes
Remote On/Off
Signal Low (Unit Off) -0.3 V - 0.4 V
Signal High (Unit On) 2.5 V - 14 V
Signal Low (Unit On) -0.3 V - 0.4 V
Signal High (Unit Off) 2.5 V - 14 V
Remote On/Off pin open, Unit on.
Output Trim Equations
Equation for calculating the trim resistor (in kΩ) given the desired adjusted voltage (Vadj) is shown below. The
Trim Up resistor should be connected between the Trim pin and Ground.
1
7525.0
507.10
−
−
=
adj
trim
V
R
Equation for calculating the trim voltage (in V) given the desired adjusted voltage (Vadj) is shown below. The
Trim Up voltage should be connected between the Trim pin and Ground.
)7525.0(0667.07.0
−
×
−=
adjtrim
VV
Rtrim
Module
Vout
GND
Trim
Vtrim
Module
Vout
GND
Trim
P1-P3P4-P6P7-P8

SRBA-03E1A0G

Mfr. #:
Buy SRBA-03E1A0G
Manufacturer:
Stewart Connector / Bel
Description:
Non-Isolated DC/DC Converters Non-Isolated DC-DC Converter 30W
Lifecycle:
New from this manufacturer.
Delivery:
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