BEL SRBA

NON-ISOLATED DC/DC CONVERTERS
8.3 V-14 V Input
0.75 V-5.0 V/6 A Output
SRBA-06A2Ax Series
RoHS Compliant
•
Non-Isolated
•
Under-Voltage Lockout (UVLO)
•
High Efficiency
•
OCP/SCP
•
High Power Density
•
Wide Input
•
Fixed Frequency
•
Wide Trim Range
•
Remote On/Off
•
Flexible Output Voltage Sequencing
•
Active Low/High
Description
The Bel SRBA-06A2Ax modules are a series of non-isolated dc/dc converters that deliver up to 6 A of output
current with full load efficiency of 92% at 5.0 V output. These modules provide precisely regulated voltage
programmable via external resistor from 0.75 V to 5.0 V over a wide range of input voltage (8.3 V-14 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, 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
0.75 V - 5.0 V
8.3 V - 14 V
6A
30.0 W
92%
SRBA-06A2AL
SRBA-06A2A0
Note: Add “G” suffix at the end of the model number to indicate Tray Packaging.
Absolute Maximum Ratings
Parameter
Min
Typ
Max
Input Voltage (continuous)
-0.3 V
-
15 V
Output Enable Terminal Voltage
-0.3 V
-
15 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-06A2Ax 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
8.3 V-14 V Input
0.75 V-5.0 V/6 A Output
Input Specifications
Parameter
Input Voltage
Input Current (full load)
Min
8.3 V
Typ
12 V
Max
14 V
Notes
Vo=5.0 V
Vo=3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.2 V
Vo=0.75 V
-
2.75 A
1.85 A
1.45 A
1.05 A
0.75 A
0.55 A
4.0 A
2.8 A
2.2 A
1.6 A
1.1 A
0.8 A
Vo=5.0 V
Vo=0.75 V
Remote Off Input Current
-
1 mA
100 mA
20 mA
2 mA
Input Reflected Ripple Current (pk-pk)
-
120 mA
-
Input Reflected Ripple Current (rms)
-
40 mA
-
Input Current (no load)
2
2
Tested with two 100 uF/25 V tan input
capacitors & simulated source
impedance of 1 uH, 5 Hz to 20 MHz.
I t Inrush Current Transient
-
0.002 A s
0.02 A2s
Turn-on Voltage Threshold
-
8.1 V
8.2 V
Turn-off Voltage Threshold
-
7.5 V
8.0 V
Notes: All specifications are typical at 25 °C unless otherwise stated.
Output Specifications
Parameter
Output Voltage Set Point
Min
-2%Vo,set
Typ
-
Max
2%Vo,set
Output Voltage Set Point
-2.5%Vo,set
-
3.5%Vo,set
0.7525 V
-
5.0 V
Adjustment Range Selected by
External Resistor or Voltage
Notes
Vin=12 V, full load
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
Current Limit Threshold
Short Circuit Surge Transient
Ripple and Noise (pk-pk)
Vo=0.75 V-3.63 V
Ripple and Noise (rms)
Vo=0.75 V-3.63 V
Ripple and Noise (pk-pk)
Vo=5.0 V
Ripple and Noise (rms)
Vo=5.0 V
Turn on Time
Overshoot at Turn on
Output Capacitance
ESR ≥ 1 mohm
ESR ≥ 10 mohm
0A
-
6A
7.2 A
-
18 A
-
0.25 A s
-
-
50 mV
75 mV
-
15 mV
30 mV
-
75 mV
100 mV
-
30 mV
8 mS
40 mV
10 mS
-
0%
3%
0 uF
0 uF
-
1000 uF
3000 uF
2
Tested with 0-20 MHz, with
10 uF/10 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
8.3 V-14 V Input
0.75 V-5.0 V/6 A Output
Output Specifications (Continued)
Parameter
Min
Typ
Max
Notes
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.
Transient Response
50% ~ 100% Max Load
Settling Time
100% ~ 50% Max Load
VO =
0.75 - 5 V
Settling Time
-
200 mV
-
-
50 uS
-
-
200 mV
-
-
50 uS
-
Note: All specifications are typical at nominal input (Vin=12 V), full load at 25 °C unless otherwise stated.
General Specifications
Parameter
Min
Typ
Max
Notes
90%
87%
85%
83%
79%
71%
92%
89%
88%
86%
82%
74%
-
250 kHz
300 kHz
350 kHz
Over Temperature Shutdown
-
135 °C
-
Output Trim Range (wide trim)
0.7525 V
-
5V
Efficiency
Vo=5.0 V
Vo=3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.2 V
Vo=0.75 V
Switching Frequency
MTBF
Measured at Vin=12 V, full load
Calculated Per Bell Core SR-332 (IO =
Nominal; Ta = 25 °C)
3,079,469 hours
Dimensions
Inches (L × W × H)
Millimeters (L × W × H)
Weight
-
0.8 x 0.45 x 0.251
20.32 x 11.42 x 6.38
3g
-
Note: All specifications are typical at 25 °C unless otherwise stated.
Control Specifications
Parameter
Signal Low (Unit Off)
Min
-0.3 V
Typ
-
Max
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
Sequencing Voltage
0V
-
Vin
-
-
2 V/mS
10 mS
-
-
-
100 mV
200 mV
200 mV
400 mV
Sequencing Slew Rate Capability
Sequencing Delay Time
Notes
SRBA-06A2A0; Remote On/Off pin open, Unit
on.
SRBA-06A2AL; Remote On/Off pin open, Unit
on.
Sequencing Voltage applied on SEQ pin
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
8.3 V-14 V Input
0.75 V-5.0 V/6 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
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.
Vout
Vtrim = 0.7 − 0.0667 × (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
8.3 V-14 V Input
0.75 V-5.0 V/6 A Output
Efficiency Data
MODULE 3.3V
MODULE 5.0V
95.0%
90.0%
85.0%
80.0%
75.0%
70.0%
65.0%
60.0%
95.0%
8.3V
12.0V
14.0V
90.0%
85.0%
80.0%
EFFICIENCY
EFFICIENCY
100.0%
75.0%
1A
2A
3A
4A
5A
6A
8.3V
12.0V
14.0V
1A
OUTPUT CURRENT
2A
4A
5A
EFFICIENCY
EFFICIENCY
8.3V
12.0V
14.0V
3A
6A
95.0%
90.0%
85.0%
80.0%
75.0%
70.0%
65.0%
60.0%
8.3V
12.0V
14.0V
1A
6A
2A
3A
4A
5A
6A
OUTPUT CURRENT
OUTPUT CURRENT
MODULE 1.2V
MODULE 0.75V
90.0%
90.0%
80.0%
8.3V
12.0V
14.0V
70.0%
60.0%
50.0%
EFFICIENCY
EFFICIENCY
5A
MODULE 1.8V
95.0%
90.0%
85.0%
80.0%
75.0%
70.0%
65.0%
60.0%
2A
4A
OUTPUT CURRENT
MODULE 2.5V
1A
3A
80.0%
8.3V
12.0V
14.0V
70.0%
60.0%
50.0%
1A
2A
3A
4A
5A
OUTPUT CURRENT
6A
1A
2A
3A
4A
5A
6A
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
8.3 V-14 V Input
0.75 V-5.0 V/6 A Output
Thermal Derating Curves
Vin=12 V, Vo=0.75 V
Vin=12 V, Vo=2.5 V
Vin=12 V, Vo=5.0 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
8.3 V-14 V Input
0.75 V-5.0 V/6 A Output
Mechanical Outline
Pin Connections
Pin
Function
1
Remote On/Off
2
Vin+
3
SEQ
4
Ground
5
Trim
6
Vout+
RECOMMENDED PAD LAYOUT
PAD SIZE:
MIN: 0.12"* 0.095" (3.05mm * 2.41mm)
MAX: 0.135"* 0.11" (3.43mm * 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. 120205
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