BEL SRBA

NON-ISOLATED DC/DC CONVERTERS
2.4 Vdc - 5.5 Vdc Input
SRBA-06F2Ax
0.75 Vdc - 3.63 Vdc/6 A Output
RoHS Compliant
Rev.A
•
Non-Isolated
•
Under-voltage Lockout (UVLO)
•
High Efficiency
•
OCP/SCP
•
High Power Density
•
Wide Input
•
Excellent Thermal Performance
•
Wide Trim Range
•
Low Cost
•
Active Low/High (option)
•
Remote On/Off
•
Able to Sink & Source Current
•
Flexible Output Voltage
Sequencing
•
Fixed Frequency (300 kHz)
Description
The Bel SRBA-06F2Ax modules are a series of non-isolated dc/dc converters that deliver up to 6 A of output
current with full load efficiency of 93% at 3.3 Vdc output. These modules provide precisely regulated voltage
programmable via external resistor from 0.75 Vdc to 3.63 Vdc over a wide range of input voltage (2.4 Vdc - 5.5
Vdc). 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, over current protection, short circuit protection, wide input, and programmable output voltage.
Part Selection
Output Voltage
0.75 V - 3.63 V
1
Input
Voltage
Max. Output
Current
Max. Output
Power
Typical
Efficiency
Model Number
Active Low
Model Number
Active High
2.4 V - 5.5 V
6A
21.8 W
93%
SRBA-06F2AL
SRBA-06F2A0
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
Min
Typ
Max
Input Voltage (continuous)
Parameter
-0.3 V
-
5.8 V
Output Enable Terminal Voltage
-0.3 V
-
5.5 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. SRBA-06F2Ax 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 or leave the SEQ pin
floating.
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 Vdc - 5.5 Vdc Input
0.75 Vdc - 3.63 Vdc/6 A Output
Input Specifications
Parameter
Input Voltage
Input Current (full load)
Min
2.4 V
Typ
-
Max
5.5 V
Notes
Vo, set ≤ Vin-0.5 V
Vo=3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.2 V
Vo=0.75 V
-
-
4.73 A
5.49 A
5.11 A
4.31 A
3.57 A
2.40 A
Vo=3.3 V
Vo=0.75 V
Remote Off Input Current
Input Reflected Ripple Current (pk-pk)
Input Reflected Ripple Current (rms)
-
50 mA
25 mA
0.6 mA
120 mA
35 mA
-
I2t Inrush Current Transient
-
-
0.04 A2s
Turn-on Voltage Threshold
Turn-off Voltage Threshold
1.8 V
2.05 V
2.0 V
2.4 V
-
Input Current (no load)
Tested with simulated source
impedance of 1uH, 5 Hz to 20 MHz.
Output Specifications
Parameter
Output Voltage Set Point
Min
-2%Vo,set
Typ
-
Max
2%Vo,set
Output Voltage Set Point
-3%Vo,set
-
3%Vo,set
0.7525 V
-
3.63 V
Load Regulation
-
0.4%Vo,set
-
Line Regulation
Regulation Over Temperature
(-40 °C to +85 °C)
Output Current
Current Limit Threshold
-
0.3%Vo,set
-
Io=0%~50% full load;
Io=50%~100% full load
Vin=Vinmin to Vinmax
-
0.4%Vo,set
-
Tref=Tamin to Tamax
0A
9A
-
6A
18 A
Short Circuit Surge Transient
-
0.32 A s
-
Ripple and Noise (pk-pk)
-
40 mV
70 mV
Ripple and Noise (rms)
-
10 mV
30 mV
Turn on Time
Overshoot at Turn on
Output Capacitance
-
6 mS
0%
10 mS
3%
0 uF
0 uF
-
1000 uF
3000 uF
Adjustment Range Selected by
External Resistor or Voltage
ESR ≥ 1mohm
ESR ≥ 10mohm
2
Notes
Vin=5 V, 50% full load
Over all operating input
voltages, resistive loads and
temperature conditions
Hiccup mode
Tested with 0-20 MHz, with
10 uF tantalum capacitor &
1uF/10 V ceramic capacitor
at output
Transient Response
50% ~ 100% Max Load
Settling Time
100% ~ 50% Max Load
Settling Time
VO = 0.75 V 3.63 V
-
130 mV
25 uS
130 mV
25 uS
-
di/dt=2.5 A/ uS; Vin=5 V; and
with 10 uF tantalum
capacitor & 1 uF/10 V TDK
ceramic capacitor at 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 Vdc - 5.5 Vdc Input
0.75 Vdc - 3.63 Vdc/6 A Output
General Specifications
Parameter
Min
Typ
Max
250 kHz
0.7525 V
93%
91%
88%
87%
84%
78%
300 kHz
135 °C
-
350 kHz
3.63 V
Notes
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 Voltage Trim Range
MTBF
Measured at Vin=5 V, full load
Calculated Per Bell Core SR-332 (Vin=5 V;
Vo=0.75 V, IO = 4.8 A; Ta = 25 °C)
6,976,379 hours
Dimensions
Inches (L × W × H)
Millimeters (L × W × H)
Weight
-
0.8 x 0.45 x 0.25
20.32 x 11.42 x 6.36
5g
-
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)
Sequencing Voltage
Sequencing Slew Rate Capability
Sequencing Delay Time
Min
Typ
Max
-0.2 V
-0.2 V
1.5 V
-
0.3 V
Vin, max
0.3 V
Vin, max
0V
-
Vin
-
-
2 V/ mS
10 mS
-
-
-
100 mV
200 mV
200 mV
400 mV
Notes
Active High: SRBA-06F2A0; Remote On/Off
pin open, Unit on.
Active Low: SRBA-06F2AL; Remote On/Off
pin open, Unit on.
Sequencing Voltage applied on SEQ pin
should be higher than output voltage.
Delay from Vinmin to application of voltage on
SEQ pin
Tracking Accuracy
Power-Up
Power-Down
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
RTrimUp =
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
VTrimUp = 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 Vdc - 5.5 Vdc Input
0.75 Vdc - 3.63 Vdc/6 A Output
Efficiency Data
Efficiency Curve
Efficiency Curve
100.0%
100.0%
95.0%
95.0%
90.0%
85.0%
4.5 V
5.0 V
5.5 V
80.0%
75.0%
Efficiency
Efficiency
90.0%
85.0%
3.0 V
5.0 V
5.5 V
80.0%
75.0%
70.0%
70.0%
65.0%
65.0%
60.0%
60.0%
0.6
1.5
3.0
4.5
0.6
6.0
1.5
Output Current (A)
Vo=3.3 V
Vo=2.5 V
Efficiency Curve
Efficiency Curve
100.0%
100.0%
95.0%
95.0%
4.5
6.0
90.0%
85.0%
3.0 V
5.0 V
5.5 V
80.0%
75.0%
Efficiency
Efficiency
90.0%
85.0%
3.0 V
5.0 V
5.5 V
80.0%
75.0%
70.0%
70.0%
65.0%
65.0%
60.0%
60.0%
0.6
1.5
3.0
4.5
0.6
6.0
1.5
3.0
Output Current (A)
Output Current (A)
Vo=1.8 V
Vo=1.5 V
Efficiency Curve
Efficiency Curve
100.0%
100.0%
95.0%
95.0%
90.0%
4.5
6.0
90.0%
85.0%
3.0 V
5.0 V
5.5 V
80.0%
75.0%
Efficiency
Efficiency
3.0
Output Current (A)
85.0%
3.0 V
5.0 V
5.5 V
80.0%
75.0%
70.0%
70.0%
65.0%
65.0%
60.0%
60.0%
0.6
1.5
3.0
4.5
6.0
0.6
1.5
3.0
4.5
Output Current (A)
Output Current (A)
Vo=1.2 V
Vo=0.7525 V
6.0
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 Vdc - 5.5 Vdc Input
0.75 Vdc - 3.63 Vdc/6 A Output
Thermal Derating Curves
Vin=5.0 V, Vo=3.3 V
Vin=3.3 V, Vo=2.5 V
Vin=5.0 V, Vo=0.75 V
Vin=3.3 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 Vdc - 5.5 Vdc Input
0.75 Vdc - 3.63 Vdc/6 A Output
Ripple and Noise Waveforms
Ripple and noise at full load, Vin=5.0 V, Vo=0.7525 V
Ripple and noise at full load, Vin=5.0 V, Vo=1.2 V
Ripple and noise at full load, Vin=5.0 V, Vo=1.5 V
Ripple and noise at full load, Vin=5.0 V, Vo=1.8 V
Ripple and noise at full load, Vin=5.0 V, Vo=2.5 V
Ripple and noise at full load, Vin=5.0 V, Vo=3.3 V
Note: Ripple and noise is tested at 0-20 MHz BW, 10 uF/10 V tantalum capacitor and 1 uF/10 V ceramic
capacitor, 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 Vdc - 5.5 Vdc Input
0.75 Vdc - 3.63 Vdc/6 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 Vdc - 5.5 Vdc Input
0.75 Vdc - 3.63 Vdc/6 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 10 uF/10 V tantalum capacitor and 1 uF/10 V ceramic
capacitor, 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 Vdc - 5.5 Vdc Input
0.75 Vdc - 3.63 Vdc/6 A Output
Mechanical Outline
Pin Connections
Pin
Function
1
Remote On/Off
2
Vin+
3
SEQ
PAD SIZE:
4
Ground
MIN: 0.012"* 0.0095" (3.05mm * 2.41mm)
5
Trim
MAX: 0.0135"* 0.011" (3.43mm * 2.79mm)
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.
©2007 Bel Fuse Inc. Specifications subject to change without notice. 011207
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