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
2.4 V - 5.5 V Input
0.75 V - 3.63 V/16 A Output
Non-Isolated
Under-voltage
Lockout
(UVLO)
High
Efficiency
Over
Temperature
Protection
High Power Density
OCP/SCP
Fixed Frequency (300 kHz)
Wide
Input
Remote
On/Off
Wide
Trim
Range
Converter Can Sink and Source
Remote
Sense
Current
Active
High/Low
(option)
Description
The Bel SRBC-16F1Ax modules are a series of non-isolated dc/dc converters that deliver up to 16 A of output
current with full load efficiency of 94% at 3.3 V output. These modules provide precisely regulated voltage
programmable via external resistor from 0.75 V to 3.63 V over a wide range of input voltage (Vin=2.4-5.5V). The
open-frame construction and small footprint enable designers to develop cost and space-efficient solutions.
Standard features include remote On/Off, over current protection, short current protection, wide input, and
programmable output voltage.
Part Selection
Output
Voltage
Input
Voltage
Max.
Output
Current
Max.
Output
Power
Typical
Efficiency
Model
Number
Active Low
Model
Number
Active High
Model
Number
Active Low
0.75 V
-
3.63 V
1
2.4 V
-
5.5 V
16 A
58 W
94%
SRBC-16F1AL
SRBC-16F1A0
SRBC-16F1AW
2
Notes
:
1. These modules use a buck topology, so the output voltages must be 0.8 V less than the input voltage.
2. "W" indicates special coating.
3. Add "G" to the end of the Model Number to indicate Tray Packaging.
Absolute Maximum Ratings
Parameter
Min
Typ
Max
Notes
Input Voltage (continuous)
-0.3 V
-
5.8 V
Output Enable Terminal Voltage
-0.3 V
-
5.8 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
Vo1.5 V
Vo=1.8 - 2.5 V
Vo=3.3 V
2.4 V
3.0 V
4.5 V
-
-
-
5.5 V
5.5 V
5.5 V
Input Current (full load)
Vo=3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.2 V
Vo=0.75 V
-
-
-
-
-
-
11.23 A
8.70 A
6.40 A
5.45 A
4.52 A
3.05 A
15.10 A
14.81 A
13.64 A
11.76 A
9.64 A
6.69 A
SRBC-16F1Ax Series RoHS Compliant
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
2.4 V - 5.5 V Input
0.75 V - 3.63 V/16 A Output
Input Specifications (continued)
Parameter
Min
Typ
Max
Notes
Input Current (no load)
-
80 mA
-
Remote Off Input Current
-
10 mA
22 mA
Input Reflected Ripple Current (pk-pk)
-
100 mA
-
Input Reflected Ripple Current (rms)
-
40 mA
-
With simulated source impedance of
1 uH, 5 Hz to 20 MHz and two 100 uF
/10 V external input Tantalum
capacitors at the input.
I
2
t Inrush Current Transient
-
0.15 A
2
s
0.3 A
2
s
Turn-on Voltage Threshold
-
2.2 V
-
Turn-off Voltage Threshold
-
2.0 V
-
Note
: All specifications are typical at 25
C unless otherwise stated.
Output Specifications
Parameter
Min
Typ
Max
Notes
Output Voltage Set Point
-2% Vo,set
-
2% Vo,set
Vin=5 V, lo=lo max
Output Voltage Set Point
-3% Vo,set
-
3% Vo,set
Over all operating input voltage,
resistive load, and temperature
conditions
Load Regulation
-
0.4% Vo,set
-
lo=lo min to lo max
Line Regulation
-
0.3% Vo,set
-
Vin=Vin min to Vin max
Regulation Over Temperature
(-40
C to +85 C)
- 0.5%
Vo,set
-
Output Current
0 A
-
16 A
Current Limit Threshold
19 A
-
35 A
Short Circuit Surge Transient
-
1.6 A
2
s 2
A
2
s
Ripple and Noise (pk-pk)
-
25 mV
50 mV
Ripple and Noise (rms)
-
8 mV
15 mV
Tested with 0-20 MHz, with external
10 uF/16 V tantalum capacitor &1 uF
/10 V TDK ceramic capacitor
Turn on Time
-
4 mS
8 mS
Overshoot at Turn on
-
0%
3%
Output Capacitance
ESR
1 mohm
ESR
10 mohm
0 uF
0 uF
-
-
1000 uF
5000 uF
Transient Response
50% ~ 100% Max Load
-
300 mV
-
Settling Time
-
50 uS
-
100% ~ 50% Max Load
-
300 mV
-
Settling Time
Vo=0.75-3.3 V
- 50
uS
-
di/dt=2.5 A/uS; Vin=5 V; and with
external 10 uF / 16 V Tantalum
capacitors and 1 uF/10 V ceramic
capacitor at the output
50% ~ 100% Max Load
-
150 mV
-
Settling Time
-
100 uS
-
100% ~ 50% Max Load
-
150 mV
-
Settling Time
Vo=0.75-3.3 V
- 100
uS
-
di/dt=2.5 A/uS; Vin=5 V; and with
external 2 x 150 uF / 10 V Tantalum
capacitors and 1 uF/10 V ceramic
capacitor at the output
Note
: All specifications are typical at nominal input, 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
2.4 V - 5.5 V Input
0.75 V - 3.63 V/16 A Output
General Specifications
Parameter
Min
Typ
Max
Notes
Efficiency
Vo=3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.2 V
Vo=0.7525 V
92%
90%
88%
85%
82%
76%
94%
92%
90%
88%
85%
79%
-
-
-
-
-
-
Measured at Vin=5 V, full load
Switching Frequency
250 kHz
300 kHz
350 kHz
Over Temperature Shutdown
-
125
C
-
Output Voltage Trim Range
0.7525 V
-
3.63 V
Remote Sense Compensation
-
-
5%
Total adjustment of trim, setpoint and
remote sense combined should not
exceed 3.63 V. Vo=0.7525 V when trim
pin open
MTBF
5,438,000 hours
Calculated Per Bell Core SR-332 (I
O
=
80% Io, max; Vo=1.8 V; Vin=5.0 V; T
a
=
25
C)
Dimensions
Inches (L W H)
Millimeters (L W H)
1.3 x 0.53 x 0.315
33.02 x 13.46 x 8.00
Weight -
6.6
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
-
0.3 V
Signal High (Unit On)
1.5 V
-
5.8 V
SRBC-16F1A0; Remote On/Off pin open, Unit
on.
Signal Low (Unit On)
-0.3 V
-
0.3 V
Signal High (Unit Off)
1.5 V
-
5.8 V
SRBC-16F1AL & SRBC-16F1AW; Remote
On/Off pin open, Unit on.
Output Trim Equations
Equation for calculating the trim resistor (in K) given the desired adjusted voltage (Vadj) is shown below. The
Trim Up resistor should be connected between the Trim pin and Ground.
11
.
5
7525
.
0
07
.
21
-
-
=
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
(
1698
.
0
7
.
0
-
-
=
adj
trim
V
V
Rtrim
Module
Vout
GND
Trim
Vtrim
Module
Vout
GND
Trim
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
2.4 V - 5.5 V Input
0.75 V - 3.63 V/16 A Output
Efficiency Data
80.0%
85.0%
90.0%
95.0%
100.0%
1 2 3 4 5 6 7 8 9 10111213141516
4.5V
5V
5.5V
70.0%
75.0%
80.0%
85.0%
90.0%
95.0%
100.0%
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
3.0V
3.3V
5V
5.5V
60.0%
65.0%
70.0%
75.0%
80.0%
85.0%
90.0%
95.0%
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
3V
3.3
5V
5.5V
60.0%
65.0%
70.0%
75.0%
80.0%
85.0%
90.0%
95.0%
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
3V
3.3V
5V
5.5V
50.0%
55.0%
60.0%
65.0%
70.0%
75.0%
80.0%
85.0%
90.0%
95.0%
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
3V
3.3V
5V
5.5
45.0%
55.0%
65.0%
75.0%
85.0%
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
3V
3.3V
5V
5.5V
Vo=3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.2 V
Vo=0.75 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
2.4 V - 5.5 V Input
0.75 V - 3.63 V/16 A Output
Thermal Derating Curves
Vin=5.0 V, Vo=3.3 V or 2.5 V
Vin=5.0 V, Vo=1.8 V or 1.5 V
Vin=5.0 V, Vo=0.7525 V or 1.2 V
Vin=3.3 V, Vo=1.8 V or 1.5 V
Vin=3.3 V, Vo=0.7525 V or 1.2 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
2.4 V - 5.5 V Input
0.75 V - 3.63 V/16 A Output
Ripple and Noise Waveforms
Vin=5.0 V, Vo=0.75 V Vin=5.0 V, Vo=1.2 V
Vin=5.0 V, Vo=1.5 V Vin=5.0 V, Vo=1.8 V
Vin=5.0 V, Vo=2.5 V Vin=5.0 V, Vo=3.3 V
Note:
Ripple and noise is tested at 0-20 MHz BW, 10 uF/16 V tantalum capacitor and 1 uF/10 V ceramic
capacitor, full load, and 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
2.4 V - 5.5 V Input
0.75 V - 3.63 V/16 A Output
Transient Response Waveforms
50% to 100% load step at Vin=5 V, Vo=0.75 V 100% to 50% load step at Vin=5 V, Vo=0.75 V
50% to 100% load step at Vin=5 V, Vo=1.2 V 100% to 50% load step at Vin=5 V, Vo=1.2 V
50% to 100% load step at Vin=5 V, Vo=1.5 V 100% to 50% load step at Vin=5 V, Vo=1.5 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
2.4 V - 5.5 V Input
0.75 V - 3.63 V/16 A Output
Transient Response Waveforms (continued)
50% to 100% load step at Vin=5 V, Vo=1.8 V 100% to 50% load step at Vin=5 V, Vo=1.8 V
50% to 100% load step at Vin=5 V, Vo=2.5 V 100% to 50% load step at Vin=5 V, Vo=2.5 V
50% to 100% load step at Vin=5 V, Vo=3.3 V 100% to 50% load step at Vin=5 V, Vo=3.3 V
Note:
Transient response is tested at di/dt=2.5 A/uS, with two 150 uF/10 V tantalum capacitors and 1uF/10 V
ceramic capacitor, Ta=25 deg C.
2006 Bel Fuse Inc. Specifications subject to change without notice. 032006
CORPORATE FAR
EAST
EUROPE
Bel Fuse Inc.
Bel Fuse Ltd.
Bel Fuse Europe Ltd.
206 Van Vorst Street
8F/ 8 Luk Hop Street
Preston Technology Management Centre
Jersey City, NJ 07302
San Po Kong
Marsh Lane, Suite G7, Preston
Tel 201-432-0463
Kowloon, Hong Kong
Lancashire, PR1 8UD, U.K.
Fax 201-432-9542
Tel 852-2328-5515
Tel 44-1772-556601
www.belfuse.com
Fax 852-2352-3706
Fax 44-1772-888366
www.belfuse.com
www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
2.4 V - 5.5 V Input
0.75 V - 3.63 V/16 A Output
Mechanical Outline
RoHS Compliance
Complies with the European Directive 2002/95/EC, calling for the elimination of lead and
other hazardous substances from electronic products.
Pin Connections
Pin
Function
1 Remote
On/Off
2 Vin
3 N/A
4 Ground
5 Vout
6 Trim
7 Remote
Sense
PAD SIZE:
MIN: 0.14"* 0.095" (3.56mm * 2.41mm)
MAX: 0.165"* 0.11" (4.19mm * 2.79mm)
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