BEL SRBA

NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input
SRBA-06E1Ax
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0.75 Vdc - 5.0 Vdc/6 A Output
RoHS Compliant
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Non-Isolated
High Efficiency
High Power Density
Fixed Frequency
Active Low/High (Option)
UL60950-1 Recognized (UL/cUL)
Rev.B
Under-Voltage Lockout (UVLO)
Remote On/Off
OCP/SCP
Wide Input
Wide Trim Range
Description
The Bel SRBA-06E1Ax modules are a series of non-isolated dc/dc converters that can deliver up to 6 A of output
current with full load efficiency of 92% 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 openframe 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
3.3 V - 5.0 V
0.75 V - 3.3 V
Input Voltage
Vo,set+1V -14 V
4.5 V - 14 V
Max. Output
Current
6A
6A
Max. Output
Power
30.0 W
19.8 W
Typical
Efficiency
92%
88%
Model Number
Active Low
SRBA-06E1AL
SRBA-06E1AL
Model Number
Active High
SRBA-06E1A0
SRBA-06E1A0
Notes: 1. Add “G” suffix at the end of the model numbers to indicate Tray Packaging.
2. All part numbers above indicate RoHS 6. Change the second letter "R" to "7" for RoHS 5 part numbers.
Absolute Maximum Ratings
Parameter
Input Voltage (continuous)
Min
-0.3 V
Typ
-
Max
15 V
Output Enable Terminal Voltage
-0.3 V
-
15 V
Ambient Temperature
-40 C
-
85 C
Storage Temperature
-55 C
-
125 C
Notes
Note: All specifications are typical at 25 C unless otherwise stated.
Input Specifications
Parameter
Min
Typ
Max
4.5 V
Vo,set + 1V
12 V
12 V
14 V
14 V
Vo=5.0 V
Vo=3.3 V
Vo=1.8 V
Vo=0.75 V
-
2.75 A
1.85 A
1.05 A
0.55 A
4.8 A
4.8 A
3.2 A
1.8 A
Vo=5.0 V
Vo=0.75 V
Remote Off Input Current
-
3 mA
100 mA
20 mA
5 mA
Input Reflected Ripple Current (pk-pk)
-
120 mA
200 mA
Input Reflected Ripple Current (rms)
-
60 mA
100 mA
Notes
Input Voltage
Vo, set≤3.3 V
Vo, set>3.3 V
Input Current (full load)
Input Current (no load)
Tested with two 100 uF/25 V input
Tantalum capacitors & simulated
source impedance of 1uH, 5 Hz to 20
MHz.
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/6 A Output
Input Specifications (continue)
Parameter
Min
2
Typ
Max
2
Notes
2
I t Inrush Current Transient
-
0.002 A s
0.02 A s
Turn-on Voltage Threshold
Vo, set  3.3 V
Vo, set = 5.0 V
-
4.3 V
6.0 V
4.5 V
6.5 V
Turn-off Voltage Threshold
Vo, set  3.3 V
Vo, set = 5.0 V
-
4.0 V
5.5 V
4.3 V
6.0 V
Shut down or below 90% set
point.
Note: All specifications are typical at 25 C unless otherwise stated.
Output Specifications
Min
Typ
Max
Output Voltage Set Point
Parameter
-2%Vo,set
-
2%Vo,set
Output Voltage Set Point
-2.5%Vo,set
-
3.5%Vo,set
Load Regulation
-
0.4%Vo,set
-
Io=Iomin to Iomax
Line Regulation
-
0.3%Vo,set
-
Vin=Vinmin to Vinmax
Regulation Over Temperature
(-40C to +85C)
-
0.5%Vo,set
-
Tref=Tamin to Tamax
0A
-
6A
6.8 A
-
15 A
-
0.25 A s
-
Vo=5.0 V
Vo=3.3 V
Vo=0.75 V
-
100 mV
80 mV
35 mV
140 mV
120 mV
70 mV
Vo=5.0 V
Vo=3.3 V
Vo=0.75 V
-
35 mV
25 mV
10 mV
50 mV
40 mV
15 mV
Turn on Time
-
6 mS
12 mS
Overshoot at Turn on
-
0%
3%
0 uF
0 uF
-
1000 uF
2200 uF
-
200 mV
350 mV
-
25 uS
50 uS
-
200 mV
350 mV
-
25 uS
50 uS
Output Current
Current Limit Threshold
Short Circuit Surge Transient
2
Notes
Vin=12 V, Io=Io max
Over all operating input voltage,
resistive load, and temperature
conditions
Ripple and Noise (pk-pk)
Ripple and Noise (rms)
Tested with 0-20 MHz BW, with
external 10 uF/10 V tantalum
capacitor & 1 uF/10 V ceramic
capacitor at the output
Output Capacitance
ESR  1mohm
ESR  10mohm
Transient Response
50% ~ 100% Max Load
Settling Time
100% ~ 50% Max Load
Settling Time
VO =
0.75 -5.0 V
di/dt=2.5 A/uS; Vin=12 V; and
with 10 uF/10 V tantalum
capacitor & 1 uF/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/6 A Output
General Specifications
Parameter
Min
Typ
Max
Vo=5.0 V
Vo=3.3 V
Vo=1.8 V
Vo=0.75 V
Switching Frequency
88%
85%
80%
68%
220 kHz
92%
88%
84%
73%
250 kHz
280 kHz
Output Voltage Trim Range (wide trim)
0.7525 V
-
5V
Notes
Efficiency
MTBF
-
Measured at Vin=12 V, Io=Io, max
Calculated Per Bell Core TR-332 (IO
= Nominal; Ta = 25 C)
3,560,000 hours
Dimensions
Inches (L × W × H)
Millimeters (L × W × H)
Surface Mount
0.8 x 0.45 x 0.251
20.32 x 11.42 x 6.38
Weight
-
5g
-
Note: All specifications are typical at 25 C unless otherwise stated.
Control Specifications
Parameter
Remote On/Off
Min
Typ
Max
Notes
Signal Low (Unit Off)
-0.3 V
-
0.4 V
Signal High (Unit On)
2.5 V
-
14 V
SRBA-06E1A0; Remote On/Off pin open, Unit
on.
Signal Low (Unit On)
-0.3 V
-
0.4 V
Signal High (Unit Off)
2.5 V
-
14 V
SRBA-06E1AL; 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.
Vout
Rtrim 
10.507
1
Vadj  0.7525
Module Trim
Rtrim
GND
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.
Vtrim  0.7  0.0667  (Vo  0.7525)
Vout
Module
Trim
Vtrim
GND
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/6 A Output
Efficiency Data
MODULE 3.3V
100.0%
100.0%
80.0%
60.0%
40.0%
20.0%
0.0%
7.0V
12.0V
14.0V
1A
2A
3A
4A
EFFICIENCY
EFFICIENCY
MODULE 5.0V
80.0%
60.0%
4.5V
12.0V
14.0V
40.0%
20.0%
0.0%
5A
1A
OUTPUT CURRENT
MODULE 1.8V
4.5V
12.0V
14.0V
80.0%
70.0%
60.0%
3.0A 4.5A
OUTPUT CURRENT
6.0A
EFFICIENCY
EFFICIENCY
90.0%
1.5A
3A
4A
5A
MODULE 0.75V
100.0%
0.6A
2A
OUTPUT CURRENT
90.0%
80.0%
4.5V
12.0V
14.0V
70.0%
60.0%
50.0%
0.6A
1.5A
3.0A
4.5A
6.0A
OUTPUT CURRENT
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/6 A Output
Thermal Derating Curves
Vo=0.75 V
Vo=2.5 V
Vo=5 V
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/6 A Output
Ripple and Noise Waveforms
12 V input, 0.75 V output
12 V input, 3.3 V output
12 V input, 1.8 V output
12 V input, 5.0 V output
Note: Ripple and noise at full load, 0-20 MHz BW, with 10 uF/10 V tantalum capacitor and 1 uF/10 V ceramic
capacitor at the output, Ta=25 deg C.
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/6 A Output
Transient Response Waveforms
50% to 100% load step at Vin=12 V, Vo=0.75 V
50% to 100% load step at Vin=12 V, Vo=1.8 V
100% to 50% load step at Vin=12 V, Vo=0.75 V
100% to 50% load step at Vin=12 V, Vo=1.8 V
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/6 A Output
Transient Response Waveforms (continued)
50% to 100% load step at Vin=12 V, Vo=3.3 V
50% to 100% load step at Vin=12 V, Vo=5 V
100% to 50% load step at Vin=12 V, Vo=3.3 V
100% to 50% load step at Vin=12 V, Vo=5 V
Note: Transient response at di/dt=2.5 A/uS, with 10 uF/10 V tantalum capacitor and 1 uF/10 V ceramic capacitor
at the output, Ta=25 deg C.
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/6 A Output
Mechanical Outline
Pin Connections
Pin
Function
1
Remote On/Off
2
Vin+
3
N/A
4
Ground
5
Trim
6
Vout+
RoHS Compliance
Complies with the European Directive 2002/95/EC, calling for the elimination of lead and
other hazardous substances from electronic products.
2009 Bel Fuse Inc. Specifications subject to change without notice. 042709
CORPORATE
FAR EAST
EUROPE
Bel Fuse Inc.
206 Van Vorst Street
Jersey City, NJ 07302
Tel 201-432-0463
Fax 201-432-9542
www.belfuse.com
Bel Fuse Ltd.
8F/ 8 Luk Hop Street
San Po Kong
Kowloon, Hong Kong
Tel 852-2328-5515
Fax 852-2352-3706
www.belfuse.com
Bel Fuse Europe Ltd.
Preston Technology Management Centre
Marsh Lane, Suite G7, Preston
Lancashire, PR1 8UD, U.K.
Tel 44-1772-556601
Fax 44-1772-888366
www.belfuse.com