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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/6 A Output
Non-Isolated
Under-voltage Lockout (UVLO)
High
Efficiency
Wide
Trim
High
Power
Density
OCP/SCP
Fixed Frequency (300 kHz)
Remote
On/Off
Over Temperature Protection
Active
Low/High
(option)
Flexible Output Voltage
Sequencing
Able to Sink & Source Current
Description
The Bel V7BA-06F2Ax modules are a series of non-isolated dc/dc converters that deliver up to 6A of output
current with full load efficiency of 93% 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 V-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, 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 -3.63 V
2.4 V 5.5 V
6 A
21.8 W
93%
V7BA-06F2AL
V7BA-06F2A0
Note
: Add "G" suffix at 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
-
5.5 V
Sequencing Voltage
1
-0.3
V
-
Vin
Ambient Temperature
-40
C
-
85
C
Storage Temperature
-55
C
-
125
C
Notes
: All specifications are typical at 25
C unless otherwise stated.
1. V7BA-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 not used sequencing feature, tie the SEQ pin to Vin.
V7BA-06F2Ax Series
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/6 A Output
Input Specifications
Parameter
Min
Typ
Max
Notes
Input Voltage
Vo1.5 V
1.8 V
2.5 V-3.3 V
2.4 V
3 V
4.5 V
-
-
-
5.5 V
5.5 V
5.5 V
Input Current (full load)
Vo=3.3V
Vo=2.5V
Vo=1.8V
Vo=1.5V
Vo=1.2V
Vo=0.75V
-
-
-
-
-
-
-
-
-
-
-
-
4.73 A
3.66 A
4.09 A
4.31 A
3.57 A
2.40 A
Input Current (no load)
Vo=3.3 V
Vo=0.75 V
-
-
50 mA
25 mA
-
-
Remote Off Input Current
-
0.6 mA
-
Input Reflected Ripple Current (pk-pk)
-
120 mA
-
Input Reflected Ripple Current (rms)
-
35 mA
-
Tested with simulated source impedance
of 1 uH, 5 Hz to 20 MHz, one 1000 uF/25 V
AL capacitor and two 100 uF/ 10 V
Tantalum capacitor at the input.
I
2
t Inrush Current Transient
-
-
0.04 A
2
s
Turn-on Voltage Threshold
-
2.05 V
2.4 V
Turn-off Voltage Threshold
1.8 V
2.0 V
-
Output Specifications
Parameter
Min
Typ
Max
Notes
Output Voltage Set Point
-2% Vo,set
-
2% Vo,set
Vin=5 V, 50% full load
Output Voltage Set Point
-3% Vo,set
-
3% Vo,set
Over all operating input voltages,
resistive loads and temperature
conditions
Adjustment Range Selected by
External Resistor or Voltage
0.7525 V
-
3.63 V
Load Regulation
-
0.4% Vo,set
-
Io=Io, min to 50%Io, max
Line Regulation
-
0.3% Vo,set
-
Vin=50% Vin, min to Vin, max
Regulation Over Temperature
(-40
C to +85 C)
-
0.4% Vo,set
-
Tref=Ta, min to Ta, max
Output Current
0 A
-
6 A
Current Limit Threshold
9 A
-
18 A
Short Circuit Surge Transient
-
0.32 A
2
s -
Ripple and Noise (pk-pk)
-
40 mV
70 mV
Ripple and Noise (rms)
-
10 mV
30 mV
Tested with 0-20 MHz, with 10 uF
Tantalum capacitor & 1 uF/10 V
ceramic capacitor at the output.
Turn on Time
-
6 mS
10 mS
Overshoot at Turn on
-
-
3%
Output Capacitance
ESR
1mohm
ESR
10mohm
0 uF
0 uF
-
-
1000 uF
3000 uF
Transient Response
50% ~ 100% Max Load
-
130 mV
-
Settling Time
-
25 uS
-
100% ~ 50% Max Load
-
130 mV
-
Settling Time
V
O
= 0.75 V -
3.63 V
- 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
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/6 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
-
-
-
-
-
-
93%
91%
88%
87%
84%
78%
-
-
-
-
-
-
Measured at Vin=5 V, full load
Switching Frequency
250 kHz
300 kHz
350 kHz
Over Temperature Shutdown
-
135
C
-
Output Voltage Trim Range
0.7525 V
-
3.63 V
MTBF
7,142,646 hours
Calculated Per Bell Core TR-332 (Vin=5 V;
Vo=0.75 V; I
O
= 4.8 A; T
a
= 25
C)
Dimensions
Inches (L W H)
Millimeters (L W H)
1.0 x 0.5 x 0.243
25.4 x 12.7 x 6.16
Weight -
5
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)
-0.2 V
-
0.3 V
Signal High (Unit On)
-
-
Vin, max
V7BA-06F2A0; Remote On/Off pin open, Unit
on.
Signal Low (Unit On)
-0.2 V
-
0.3 V
Signal High (Unit Off)
1.5 V
-
Vin, max
V7BA-06F2AL; Remote On/Off pin open, Unit
on.
Sequencing Voltage
0 V
-
Vin
Sequencing Voltage applied on SEQ pin
should be higher than output voltage.
Sequencing Slew Rate Capability
-
-
2 V/mS
Sequencing Delay Time
10 mS
-
-
Delay from Vin, min to application of voltage
on SEQ pin
Tracking Accuracy
Power-Up
Power-Down
-
-
100 mV
200 mV
200 mV
400 mV
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/6 A Output
Efficiency Data
3.3 V Module
60.0%
65.0%
70.0%
75.0%
80.0%
85.0%
90.0%
95.0%
100.0%
0.6 A
1.5 A
3.0 A
4.5 A
6.0 A
Output Current
Ef
f
i
c
i
e
n
c
y
4.5 V
5 V
5.5 V
2.5 V Module
60.0%
65.0%
70.0%
75.0%
80.0%
85.0%
90.0%
95.0%
100.0%
0.6 A
1.5 A
3.0 A
4.5 A
6.0 A
Output Current
Ef
f
i
c
i
en
c
y
4.5 V
5 V
5.5 V
1.8 V Module
60.0%
65.0%
70.0%
75.0%
80.0%
85.0%
90.0%
95.0%
100.0%
0.6 A
1.5 A
3.0 A
4.5 A
6.0 A
Output Current
Ef
f
i
c
i
e
n
c
y
3 V
5 V
5.5 V
1.5 V Module
60.0%
65.0%
70.0%
75.0%
80.0%
85.0%
90.0%
95.0%
100.0%
0.6 A
1.5 A
3.0 A
4.5 A
6.0 A
Output Current
E
f
f
i
ci
enc
y
2.4 V
5 V
5.5 V
1.2 V Module
60.0%
65.0%
70.0%
75.0%
80.0%
85.0%
90.0%
95.0%
100.0%
0.6 A
1.5 A
3.0 A
4.5 A
6.0 A
Output Current
E
ffi
ci
e
n
c
y
2.4 V
5 V
5.5 V
0.7525 V Module
60.0%
65.0%
70.0%
75.0%
80.0%
85.0%
90.0%
95.0%
100.0%
0.6 A
1.5 A
3.0 A
4.5 A
6.0 A
Output Current
Ef
f
i
c
i
e
n
c
y
2.4 V
5 V
5.5 V
2005 Bel Fuse Inc. Specifications subject to change without notice. 040805
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/6 A Output
Pin Connections
Pin
Function
1 Vout
2 Trim
3 Ground
4 SEQ
5 Vin
6 Remote
On/Off
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