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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
2.4V-5.5V Input
0.75V-3.63V/16A Output
Non-Isolated
Under-voltage
Lockout
(UVLO)
High
Efficiency
Over
Temperature
Protection
High Power Density
Remote
Sense
OCP/SCP
Wide
Input
Fixed Frequency (300kHz)
Wide
Trim
Flexible Output Voltage
Sequencing
Converter can sink and source
Current
Remote
On/Off
Active
Low/High
(option)
Description
The Bel V7BC-16F2Ax modules are a series of non-isolated DC/DC converters that can deliver up to 16A of
output current with full load efficiency of 94% at 3.3V output. These modules provide precisely regulated voltage
programmable via external resistor from 0.75Vdc to 3.63Vdc over a wide range of input voltage(2.4V-5.5V).
These modules have a sequencing feature that enables designers to implement various types of output voltage
sequencing when powering multiple voltages on a board. Their open-frame construction and small footprint
enable designers to develop cost and space-efficient solutions. Standard features include remote ON/OFF,
programmable output voltage and over current protection.
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 3.63V
2.4V 5.5V
16A
58.1W
94%
V7BC-16F2AL
V7BC-16F2A0
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)
-0.3V
-
5.8V
Output Enable Terminal Voltage
-0.3V
-
5.8V
Sequencing Voltage
1
-0.3V
-
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. V7BC-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.
V7BC-16F2Ax 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
2.4V-5.5V Input
0.75V-3.63V/16A Output
Input Specifications
Parameter
Min
Typ
Max
Notes
Input Voltage
Vo=3.3V
Vo=1.8V-2.5V
Vo
1.5V
4.5V
3.0V
2.4V
-
-
-
5.5V
5.5V
5.5V
Input Current (full load)
Vo=3.3V
Vo=1.8V
Vo=0.75V
-
-
-
11.23A
6.47A
3.08A
12.89A
13.55A
6.67A
Input Current (no load)
-
80mA
-
Remote Off Input Current
-
10mA
22mA
Input Reflected Ripple Current (pk-pk)
-
100mA
-
Input Reflected Ripple Current (RMS)
-
40mA
-
Tested with two 100uF/10V tantalum
input capacitors (P/N:
TPSC107K010R0075 AVX) & simulated
source impedance of 1uH, 5Hz to
20MHz.
I
2
t Inrush Current Transient
-
0.15A
2
s
0.3A
2
s
Turn-on Voltage Threshold
-
2.2V
-
Turn-off Voltage Threshold
-
2.0V
-
Output Specifications
Parameter
Min
Typ
Max
Notes
Output Voltage Set Point
-2%Vo,set
-
2%Vo,set
Vin=5V, 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
-
0.3%Vo,set
-
Vin=Vin, min to Vin, max
Regulation Over Temperature
(-40
C to +85C)
-
0.5%Vo,set
-
Tref=Ta, min to Ta, max
Output Current
0A - 16A
Current Limit Threshold
19A - 35A
Short Circuit Surge Transient
- 1.6A
2
s 2A
2
s
Ripple and Noise (pk-pk)
-
25mV
50mV
Ripple and Noise (RMS)
-
8mV
15mV
Tested with 0-20MHz,
10uF/16V tantalum capacitor &
1uF/10V TDK ceramic
capacitor at output
Turn on Time
-
4mS
8mS
Overshoot at Turn on
-
0%Vo,set
3%Vo,set
Output Capacitance
ESR
1mohm
ESR
10mohm
0uF
0uF
-
-
1000uF
5000uF
Transient Response
1
50% ~ 100% Max Load
-
300mV
-
Settling Time
-
50uS
-
100% ~ 50% Max Load
-
300mV
-
Settling Time
V
O
=0.75V -
3.3V
- 50uS
-
di/dt=2.5A/uS; Vin=5V; and
with 10uF/16V tantalum
capacitor & 1uF/10V ceramic
capacitor at output
Transient Response
2
50% ~ 100% Max Load
-
150mV
-
Settling Time
-
100uS
-
100% ~ 50% Max Load
-
150mV
-
Settling Time
V
O
=0.75V -
3.3V
- 100uS
-
di/dt=2.5A/uS; Vin=5V; and
with two 150uF/10V tantalum
capacitors & 1uF/10V ceramic
capacitor at output
Note
: All specifications are typical at nominal input (Vin=5V), 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
2.4V-5.5V Input
0.75V-3.63V/16A Output
General Specifications
Parameter
Min
Typ
Max
Notes
Efficiency
Vo=3.3V
Vo=1.8V
Vo=0.75V
91%
86%
75%
94%
89%
78%
-
-
-
Measured at Vin=5V, full load
Switching Frequency
250KHz
300KHz
350KHz
Over Temperature Shutdown
-
125
C
-
Output Trim Range (Wide Trim)
0.7525V
-
3.63V
Remote Sense Compensation
-
-
5%
MTBF 5,109,613
hours
Calculated Per Bell Core TR-332 (I
O
=
Nominal; T
a
= 25
C)
Dimensions
Inches (L W H)
Millimeters (L W H)
2.0 x 0.5 x 0.363
50.80 x 12.7 x 9.23
Weight -
8.3g
-
Note
: All specifications are typical at 25
C
unless otherwise stated.
Control Specifications
Parameter
Min
Typ
Max
Notes
Signal Low (Unit Off)
-0.3V
-
0.3V
Signal High (Unit On)
1.5V
-
5.8V
V7BC-16F2A0; Remote On/Off pin
open, Unit on.
Signal Low (Unit On)
-0.3V
-
0.3V
Signal High (Unit Off)
1.5V
-
5.8V
V7BC-16F2AL; Remote On/Off pin
open, Unit on.
Sequencing Voltage
0.05V
-
Vin
Sequencing Voltage should be higher
than output voltage.
Sequencing Slew Rate Capability
-
-
2V/mS
Sequencing Delay Time
10mS
-
-
Delay from Vin, min to application of
voltage on SEQ pin
Tracking Accuracy
Power-Up
Power-Down
-
-
100mV
200mV
200mV
400mV
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
2.4V-5.5V Input
0.75V-3.63V/16A Output
Efficiency Data
80.0%
82.0%
84.0%
86.0%
88.0%
90.0%
92.0%
94.0%
96.0%
98.0%
1.6
4.0
8.0
12.0
16.0
4.5V
5.0V
5.5V
Vo=3.3V
70.0%
75.0%
80.0%
85.0%
90.0%
95.0%
100.0%
1.6
4.0
8.0
12.0
16.0
3.0V
5.0V
5.5V
Vo=1.8V
60.0%
65.0%
70.0%
75.0%
80.0%
85.0%
90.0%
95.0%
1.6
4.0
8.0
12.0
16.0
2.4V
5.0V
5.5V
Vo=0.75V
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
2.4V-5.5V Input
0.75V-3.63V/16A Output
Thermal Derating Curves
V7BC-16F2A0, Vo=3.3V
V7BC-16F2A0, Vo=1.8V
V7BC-16F2A0, Vo=0.7525V
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