BEL SRBC

NON-ISOLATED DC/DC CONVERTERS
2.4 V-5.5 V Input
0.75 V-3.63 V/16 A Output
SRBC-16F2Ax Series
RoHS Compliant
•
Non-Isolated
•
Under-voltage Lockout (UVLO)
•
High Efficiency
•
Over Temperature Protection
•
High Power Density
•
Wide Input Range
•
Fixed Frequency (300 kHz)
•
Wide Trim Range
•
OCP/SCP
•
Remote Sense
•
Flexible Output Voltage
Sequencing
•
Converter can sink and source
current
•
Remote On/Off
•
Active Low/High (option)
Description
The Bel SRBC-16F2Ax 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 (2.4-5.5 V). These
modules have a sequencing feature that enables designers to implement various types of output voltage
sequencing when powering multiple voltages on a board. The open-frame construction and small footprint
enable designers to develop cost and space-efficient solutions. Standard features include remote On/Off,
remote sense, over current protection, short current protection, wide input, and programmable output voltage.
Part Selection
Output
Voltage
1
0.75 V-3.63 V
Input
Voltage
Max.
Output
Current
Max.
Output
Power
Typical
Efficiency
Model
Number
Active Low
Model
Number
Active High
Model
Number
Active Low
2.4 V-5.5 V
16 A
58.1 W
94%
SRBC-16F2AL
SRBC-16F2A0
SRBC-16F2AW
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
Min
Typ
Max
Input Voltage (continuous)
Parameter
-0.3 V
-
5.8 V
Output Enable Terminal Voltage
-0.3 V
-
5.8 V
1
-0.3 V
-
Vin
Ambient Temperature
-40 °C
-
85 °C
Storage Temperature
-55 °C
-
125 °C
Sequencing Voltage
Notes
Notes: All specifications are typical at 25 °C unless otherwise stated.
1. SRBC-16F2Ax series of modules include a sequencing feature that enables users to implement
various types of output voltage sequencing in their applications. This is accomplished via an additional
sequencing pin. When the sequencing feature is not used, tie the SEQ pin to Vin.
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
Parameter
Input Voltage
Input Current (full load)
Min
2.4 V
Typ
-
Max
5.5 V
Input Current (no load)
-
11.23 A
8.70 A
6.40 A
5.45 A
4.52 A
3.05 A
80 mA
15.10 A
14.81 A
13.64 A
11.76 A
9.64 A
6.69 A
-
Remote Off Input Current
-
10 mA
22 mA
Input Reflected Ripple Current (pk-pk)
-
100 mA
-
Input Reflected Ripple Current (rms)
-
40 mA
-
I t Inrush Current Transient
-
0.15 A s
0.3 A s
Turn-on Voltage Threshold
-
2.2 V
-
Turn-off Voltage Threshold
-
2.0 V
-
Vo=3.3V
Vo=2.5V
Vo=1.8V
Vo=1.5V
Vo=1.2V
Vo=0.75V
2
2
Notes
Vo, set ≤ Vin-0.8 V
Tested with two 100uF/10V tantalum input
capacitors (P/N: TPSC107K010R0075
AVX) & simulated source impedance of
1 uH, 5 Hz to 20 MHz.
2
Output Specifications
Parameter
Output Voltage Set Point
Min
-2% Vo,set
Typ
-
Max
2% Vo,set
Notes
Vin=5 V, lo=lomax full load
Output Voltage Set Point
-3% Vo,set
-
3% Vo,set
Over all operating input voltages,
resistive loads and temperature
conditions
Load Regulation
-
0.4% Vo,set
-
Io=Io, min to Io, max
Line Regulation
Regulation Over Temperature
(-40 °C to +85 °C)
Output Current
-
0.3% Vo,set
-
Vin=Vin, min to Vin, max
-
0.5% Vo,set
-
Tref=Ta, min to Ta, max
0A
-
16 A
Current Limit Threshold
19 A
-
Short Circuit Surge Transient
-
1.6A s
2A s
Ripple and Noise (pk-pk)
-
25 mV
50 mV
Ripple and Noise (rms)
-
8 mV
15 mV
Turn on Time
-
4 mS
8 mS
Overshoot at Turn on
Output Capacitance
-
0% Vo,set
3% Vo,set
0 uF
0 uF
-
1000 uF
5000 uF
ESR ≥ 1 mohm
ESR ≥ 10 mohm
35 A
2
2
Tested with 0-20 MHz, 10 uF /
16 V tantalum capacitor & 1 uF
/10 V TDK ceramic capacitor at
the output
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
Output Specifications (continued)
Parameter
Min
Typ
Max
Notes
Transient Response
50% ~ 100% Max Load
Settling Time
100% ~ 50% Max Load
Settling Time
50% ~ 100% Max Load
Settling Time
100% ~ 50% Max Load
Settling Time
-
All
All
300 mV
50 uS
300 mV
50 uS
150 mV
100 uS
150 mV
100 uS
-
di/dt=2.5 A/uS; Vin=5 V; and
with 10 uF/16 V tantalum
capacitor & 1 uF/10 V ceramic
capacitor at the output
di/dt=2.5 A/us, Vin=5 V; and
with two 150 uF/10 V tantalum
capacitors & 1 uF/10 V ceramic
capacitor at the output
Note: All specifications are typical at nominal input (Vin=5 V), full load at 25 °C unless otherwise stated.
General Specifications
Parameter
Min
Typ
Max
92%
90%
88%
85%
82%
76%
250 kHz
0.7525 V
-
94%
92%
90%
88%
85%
79%
300 kHz
125 °C
-
350 kHz
3.63 V
5%
Efficiency
Vo=3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.2 V
Vo=0.75 V
Switching Frequency
Over Temperature Shutdown
Output Trim Range (Wide Trim)
Remote Sense Compensation
MTBF
Notes
Measured at Vin=5 V, full load
Calculated Per Bell Core SR-332 (IO =
Nominal; Ta = 25 °C)
5,438,000 hours
Dimensions
Inches (L × W × H)
Millimeters (L × W × H)
Weight
-
1.30 x 0.53 x 0.315
33.02 x 13.46 x 8.00
6.6 g
-
Note: All specifications are typical at 25 °C unless otherwise stated.
Control Specifications
Parameter
Remote On/Off
Signal Low (Unit Off)
Signal High (Unit On)
Signal Low (Unit On)
Signal High (Unit Off)
Min
Typ
Max
Notes
-0.3 V
1.5 V
-0.3 V
1.5 V
-
0.3 V
5.8 V
0.3 V
5.8 V
SRBC-16F2A0; Remote On/Off pin open, Unit
on.
Sequencing Voltage
0.05V
-
Vin
-
-
2 V/mS
10 mS
-
-
-
100 mV
200 mV
200 mV
400 mV
Sequencing Slew Rate Capability
Sequencing Delay Time
SRBC-16F2AL & SRBC-16F2AW; Remote
On/Off pin open, Unit on.
Sequencing Voltage should be higher than
output voltage.
Delay from Vin, min to application of voltage
on SEQ pin
Tracking Accuracy
Power-Up
Power-Down
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
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 =
21.07
− 5.11
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.
Vout
Vtrim = 0.7 − 0.1698 × (Vadj − 0.7525)
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
2.4 V-5.5 V Input
0.75 V-3.63 V/16 A Output
Efficiency Data
98.0%
100.0%
96.0%
95.0%
94.0%
92.0%
90.0%
3.0V
85.0%
3.3V
5V
4.5V
90.0%
5V
88.0%
5.5V
5.5V
80.0%
86.0%
84.0%
75.0%
82.0%
70.0%
80.0%
1
2
3
4
5
6
7
8
9
10
11 12 13 14
1
15 16
2
3
4
5
6
7
Vo=3.3 V
8
9
10
11
12 13
14 15
16
Vo=2.5 V
95.0%
95.0%
90.0%
90.0%
85.0%
85.0%
80.0%
3V
3.3
75.0%
5V
5.5V
3V
80.0%
3.3V
5V
5.5V
75.0%
70.0%
70.0%
65.0%
65.0%
60.0%
60.0%
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
1
16
2
3
4
5
6
7
8
Vo=1.8 V
9
10
11
12
13
14
15
16
Vo=1.5 V
95.0%
90.0%
90.0%
85.0%
85.0%
80.0%
80.0%
75.0%
70.0%
65.0%
3V
75.0%
3.3V
5V
5.5
70.0%
3V
3.3V
5V
5.5V
65.0%
60.0%
60.0%
55.0%
55.0%
50.0%
45.0%
50.0%
1
2
3
4
5
6
7
8
9
Vo=1.2 V
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Vo=0.7525 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=2.5 V or 3.3 V
Vin=5.0 V, Vo=1.5 V or 1.8 V
Vin=5.0 V, Vo=0.7525 V or 1.2 V
Vin=3.3 V, Vo=1.5 V or 1.8 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
Mechanical Outline
Pin Connections
BOTTOM VIEW
Pin
Function
1
Remote On/Off
2
Vin
3
SEQ
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)
RoHS Compliance
Complies with the European Directive 2002/95/EC, calling for the elimination of lead and
other hazardous substances from electronic products.
©2005 Bel Fuse Inc. Specifications subject to change without notice. 120905
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