BEL V7AH

NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
12V Input / 0.9V – 5.0V Output / 2A
BP04x7AH-02A
S7AH-02A / V7AH-02A Series
•
Nonisolated
•
Compact, low profile surface mount package
•
Fixed frequency
•
High efficiency means less power dissipation
•
Excellent thermal performance
•
Optimized for cost
•
Remote on/off
•
Undervoltage lockout (UVLO)
•
Over current and short circuit protection
•
Industrial temperature range
Description
The Bel S7AH-02A and V7AH-02A modules are a series of non-isolated, step down DC/DC power converters that operate from
a nominal 12V source. These converters are available in a range of output voltages from 0.9V to 5.0V. They are packaged in a
compact, overmolded package rated at 2A. Optional lead forming provides a vertical mount product for minimal footprint or a
surface mount option for a very low profile. Standard features include remote on/off, over current and short circuit protection,
output voltage adjust and industrial temperature ranges (-40° to +85° C). The output is closely regulated and the efficiency is
typically 89% at full load. These products may be used almost anywhere low voltage silicon is employed and a 12V source is
available. Typical applications include file servers, routers, line cards and other computing and communications equipment.
Applications
•
Distributed power architectures
•
Telecommunications
•
Data networking equipment
•
Computers and peripherals
Part Number Selection
Output
Voltage
Input
Voltage
Max. Output
Current
Max. Output
Power
Typical
Efficiency
Part Number
Surface Mount
Part Number
Vertical Mount
5.0V
12V
2A
10W
89%
S7AH-02A500
V7AH-02A500
5.0V
12V
2A
10W
89%
S7AH-02A50F*
V7AH-02A50F*
3.3V
12V
2A
6.6W
88%
S7AH-02A330
V7AH-02A330
2.5V
12V
2A
5.0W
86%
S7AH-02A250
V7AH-02A250
1.8V
12V
2A
3.6W
82%
S7AH-02A180
V7AH-02A180
1.5V
12V
2A
3.0W
78%
S7AH-02A150
V7AH-02A150
1.2V
12V
2A
2.4W
74%
S7AH-02A120
V7AH-02A120
0.9V
12V
2A
1.8W
70%
S7AH-02A090
V7AH-02A090
0.9 ~ 3.63V
12V
2A
7.3W
70%
S7AH-02A1A0
V7AH-02A1A0
0.9 ~ 3.63V
12V
2A
7.3W
70%
S7AH-02A1AF*
V7AH-02A1AF*
* F indicates fast start up.
©2004 Bel Fuse Inc.
Specifications subject to change without notice. 03.04
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 1
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
12V Input / 0.9V – 5.0V Output / 2A
BP04x7AH-02A
Absolute Maximum Ratings
Parameter
Max
Unit
-0.3
15
V
Vouten
-0.3
15
V
Ambient Temperature
Tamb
-40
85
°C
Storage Temperature
Tstor
-55
125
°C
Continuous Input Voltage
Output Enable Terminal Voltage
Symbol
Min
Vin
Typical
Note: Use beyond the maximum ratings may cause a reliability degradation of the DC/DC
converter or may permanently damage the device.
Input Specifications
Parameter
Operating Input Voltage
Module
Symbol
Min
All
Vin
10.8
Typical
Max
Units
13.2
V
Iin
Input Current
A
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
0.9V
1.2
0.85
0.7
0.5
0.45
0.4
0.35
No Load Input Current
All
50
mA
Remote Off Input Current
All
3
10
mA
Input Reflected Ripple Current1
All
100
mArms
Input Reflected Ripple Current (P-P)1
All
300
mApk
I2t Inrush Current Transient
All
0.01
Turn On Voltage Threshold
All
9.6
Turn Off Voltage Threshold
All
8.8
0.02
A2s
V
9.8
V
Note: 1. Use a 47uF/25V tan capacitor at the input.
©2004 Bel Fuse Inc.
Specifications subject to change without notice. 03.04
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 2
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
12V Input / 0.9V – 5.0V Output / 2A
BP04x7AH-02A
Output Specifications
Parameter
Module
Min
Typical
Max
4.9
3.247
2.460
1.771
1.476
1.181
0.886
5.0
3.3
2.5
1.8
1.5
1.2
0.9
5.1
3.353
2.540
1.829
1.524
1.219
0.914
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
0.9V
15
10
8
5
5
4
3
30
30
20
10
10
10
10
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
0.9V
2
2
2
1
1
1
1
5
5
5
5
5
5
5
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
0.9V
35
35
20
15
10
8
2
45
45
30
25
20
15
5
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
0.9V
52
47
30
21
16
13
6
80
80
55
40
35
30
20
Output Voltage Set Point 1
Symbol
Units
Vout
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
0.9V
V
mV
Load Regulation
Line Regulation
Regulation Over Temperature
(-40° to 85° C)
Total Output Voltage Regulation
(-40° to 85° C)
mV
mV
mV
Note: All specifications are typical at nominal input, full load at 25° C unless otherwise stated.
1. Vin=12V,lout=half load,Ta=25° C.
©2004 Bel Fuse Inc.
Specifications subject to change without notice. 03.04
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 3
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
12V Input / 0.9V – 5.0V Output / 2A
BP04x7AH-02A
Output Specifications
Parameter
Module
Symbol
Min
Typical
Max
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
0.9V
60
60
50
40
35
35
35
80
80
70
60
60
60
60
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
0.9V
25
20
15
15
15
10
10
35
35
25
25
25
20
20
Output Ripple and Noise 2
Units
mVp-p
Output Ripple and Noise 2
mVrms
Output Current Range
All
Iout
0
2
A
Output DC Current Limit
All
Ioutlim
2.5
6
A
A2s
Ioutsurge
Shor t Circuit Surge
0.4
0.4
0.4
0.5
0.5
0.5
0.55
0.8
0.8
0.8
1.0
1.0
1.0
1.1
70
20
100
40
10
20
ms
All
0
3
%
1.5V - 5.0V
0.9V - 1.2V
0
0
3
10
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
0.9V
Ton
Turn on Time
ms
0.9V - 3.63V
5.0V
Turn on Time3
Ton
Overshoot at Turn On
Overshoot at Turn On3
Output Capacitance
%
All
Cout
100
1000
µF
Note: All specifications are typical at nominal input, full load at 25° C unless otherwise stated.
2. 0 - 20MHz BW with 100uF tan cap and 1uF ceramic cap.
3. For fast startup modules.
©2004 Bel Fuse Inc.
Specifications subject to change without notice. 03.04
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 4
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
12V Input / 0.9V – 5.0V Output / 2A
BP04x7AH-02A
Output Specifications
Parameter
Transient Response
Module
Symbol
Min
Typical
Max
Units
150
200
mV
100
140
µs
150
200
mV
100
140
µs
120
150
mV
40
60
µs
120
150
mV
40
60
µs
100
130
mV
40
60
µs
100
130
mV
40
60
µs
90
120
mV
40
60
µs
90
120
mV
40
60
µs
3
∆V 50% to 100% of Max Load
Settling Time
Ts
5.0V
∆V 100% to 50% of Max Load
Settling Time
Transient Response
Ts
3
∆V 50% to 100% of Max Load
Settling Time
Ts
3.3V
∆V 100% to 50% of Max Load
Settling Time
Transient Response
Ts
3
∆V 50% to 100% of Max Load
Settling Time
Ts
2.5V
∆V 100% to 50% of Max Load
Settling Time
Transient Response
Ts
3
∆V 50% to 100% of Max Load
Settling Time
Ts
1.8V
∆V 100% to 50% of Max Load
Settling Time
Ts
Note: All specifications are typical at nominal input, full load at 25° C unless otherwise stated.
3. di/dt=0.1A/uS,Ta=25° C with 220uF/10V Tan cap.
©2004 Bel Fuse Inc.
Specifications subject to change without notice. 03.04
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 5
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
12V Input / 0.9V – 5.0V Output / 2A
BP04x7AH-02A
Output Specifications
Parameter
Module
Symbol
Min
Typical
Max
Units
80
110
mV
40
60
µs
80
110
mV
40
60
µs
70
100
mV
40
60
µs
70
100
mV
40
60
µs
60
90
mV
40
60
µs
60
90
mV
40
60
µs
Transient Response 3
∆V 50% to 100% of Max Load
Settling Time
Ts
1.5V
∆V 100% to 50% of Max Load
Settling Time
Ts
Transient Response 3
∆V 50% to 100% of Max Load
Settling Time
Ts
1.2V
∆V 100% to 50% of Max Load
Settling Time
Ts
Transient Response 3
∆V 50% to 100% of Max Load
Settling Time
Ts
0.9V
∆V 100% to 50% of Max Load
Settling Time
Ts
Note: All specifications are typical at nominal input, full load at 25° C unless otherwise stated.
3. di/dt=0.1A/uS,Ta=25° C with 220uF/10V Tan cap.
©2004 Bel Fuse Inc.
Specifications subject to change without notice. 03.04
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 6
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
12V Input / 0.9V – 5.0V Output / 2A
BP04x7AH-02A
General Specifications
Parameter
Module
Symbol
Min
Typical
86
85
83
79
75
71
67
89
88
86
82
78
74
70
210
280
250
320
Max
Units
η
Efficiency1
%
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
0.9V
Switching Frequency
Fsw
kHz
0.9V ~ 3.3V
5.0V
Output Voltage Trim Range
(Wide Trim)2
290
360
0.9V
Output Voltage Trim Range
(Narrow Trim)2
403
90
90
90
90
90
90
--
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
0.9V
Weight
%
%
110
110
110
110
110
110
110
4.9
All
g
1. Efficiency is measured at Vin=12V, full load and Ta=25° C.
2. See graphs on pages 17-25.
Control Specifications
Parameter
Remote On/Off 3
Module
Symbol
All
Vouten
Min
Typical
Max
Units
V
Signal Low (Unit Off)
All
-0.3
1
V
Signal High (Unit On)
All
2.8
13.2
V
3. With remote on/off pin 1 open, unit on.
©2004 Bel Fuse Inc.
Specifications subject to change without notice. 03.04
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 7
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
12V Input / 0.9V – 5.0V Output / 2A
BP04x7AH-02A
Efficiency Data
MODULE 3.3V
MODULE 5.0V
85%
80%
10.8
75%
12
70%
13.2
EFFICIENCY
EFFICIENCY
90%
65%
60%
0.20
0.50
1.00
1.50
2.00
95%
90%
85%
80%
75%
70%
65%
60%
55%
0.20
10.8
12
13.2
0.50
OUTPUT CURRENT
10.8
80%
12
70%
13.2
60%
1.50
2.00
OUTPUT CURRENT
©2004 Bel Fuse Inc.
EFFICIENCY
EFFICIENCY
90%
1.00
2.00
MODULE 1.8V
100%
0.50
1.50
OUTPUT CURRENT
MODULE 2.5V
50%
0.20
1.00
90%
85%
80%
75%
70%
65%
60%
55%
50%
0.20
10.8
12
13.2
0.50
1.00
1.50
2.00
OUTPUT CURRENT
Specifications subject to change without notice. 03.04
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 8
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
12V Input / 0.9V – 5.0V Output / 2A
BP04x7AH-02A
Efficiency Data
EFFICIENCY
MODULE 1.5V
85%
80%
75%
70%
65%
60%
55%
50%
45%
0.20
10.8
12
13.2
0.50
1.00
1.50
2.00
OUTPUT CURRENT
MODULE 1.2V
EFFICIENCY
85%
75%
10.8
65%
12
13.2
55%
45%
0.20
0.50
1.00
1.50
2.00
OUTPUT CURRENT
MODULE 0.9V
EFFICIENCY
80%
70%
10.8
12
60%
13.2
50%
40%
0.20
0.50
1.00
1.50
2.00
OUTPUT CURRENT
©2004 Bel Fuse Inc.
Specifications subject to change without notice. 03.04
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 9
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
12V Input / 0.9V – 5.0V Output / 2A
BP04x7AH-02A
Ripple and Noise
With 100µF tan cap and 1uF ceramic cap at the output.
Ripple and noise at full load and 12Vdc input,
5.0Vdc output and Ta=25° C
Ripple and noise at full load and 12Vdc input,
2.5Vdc output and Ta=25° C
©2004 Bel Fuse Inc.
Ripple and noise at full load and 12Vdc input,
3.3Vdc output and Ta=25° C
Ripple and noise at full load and 12Vdc input,
1.8Vdc output and Ta=25° C
Specifications subject to change without notice. 03.04
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 10
NON-ISOLATED DC/DC CONVERTERS
12V Input / 0.9V – 5.0V Output / 2A
POWER PRODUCTS
BP04x7AH-02A
Ripple and Noise
With 100µF tan cap and 1uF ceramic cap at the output.
Ripple and noise at full load and 12Vdc input,
1.5Vdc output and Ta=25° C
Ripple and noise at full load and 12Vdc input,
1.2Vdc output and Ta=25° C
Ripple and noise at full load and 12Vdc input,
0.9Vdc output and Ta=25° C
©2004 Bel Fuse Inc.
Specifications subject to change without notice. 03.04
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 11
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
12V Input / 0.9V – 5.0V Output / 2A
BP04x7AH-02A
Transient Response
Transient response: di/dt = 0.1A/µS, with 220µF Tan capacitor.
Vout=5.0V
50% to 100% load transients at 12V input and Ta=25° C
Vout=3.3V
50% to 100% load transients at 12V input and Ta=25° C
©2004 Bel Fuse Inc.
Vout=5.0V
100% to 50% load transients at 12V input and Ta=25° C
Vout=3.3V
100% to 50% load transients at 12V input and Ta=25° C
Specifications subject to change without notice. 03.04
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 12
NON-ISOLATED DC/DC CONVERTERS
12V Input / 0.9V – 5.0V Output / 2A
POWER PRODUCTS
BP04x7AH-02A
Transient Response
Transient response: di/dt = 0.1A/µS, with 220µF Tan capacitor..
Vout=2.5V
50% to 100% load transients at 12V input and Ta=25° C
Vout=2.5V
100% to 50% load transients at 12V input and Ta=25° C
Vout=1.8V
50% to 100% load transients at 12V input and Ta=25° C
Vout=1.8V
100% to 50% load transients at 12V input and Ta=25° C
©2004 Bel Fuse Inc.
Specifications subject to change without notice. 03.04
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 13
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
12V Input / 0.9V – 5.0V Output / 2A
BP04x7AH-02A
Transient Response
Transient response: di/dt = 0.1A/µS, with 220µF Tan capacitor..
Vout=1.5V
50% to 100% load transients at 12V input and Ta=25° C
Vout=1.5V
100% to 50% load transients at 12V input and Ta=25° C
Vout=1.2V
50% to 100% load transients at 12V input and Ta=25° C
Vout=1.2V
100% to 50% load transients at 12V input and Ta=25° C
Vout=0.9V
50% to 100% load transients at 12V input and Ta=25° C
Vout=0.9V
100% to 50% load transients at 12V input and Ta=25° C
©2004 Bel Fuse Inc.
Specifications subject to change without notice. 03.04
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 14
NON-ISOLATED DC/DC CONVERTERS
12V Input / 0.9V – 5.0V Output / 2A
POWER PRODUCTS
BP04x7AH-02A
Thermal Considerations
Vin = 12V
x7AH-02A1Ax
0.9 ~ 3.3V
x7AH-02A50x
©2004 Bel Fuse Inc.
Specifications subject to change without notice. 03.04
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 15
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
12V Input / 0.9V – 5.0V Output / 2A
BP04x7AH-02A
Output Voltage Set-Point Adjustment
x7AH-02A1Ax Trim Resistor Calculation
50
50
45
Trim resistor value,Rtrim_up(Kohm)
40
35
30
Rtrimup(Vadj_up) 25
20
15
10
5
Rtrim up =
(
3.712
Vo, adj – Vo
0 0
0.9 1.17 1.45 1.72 1.99 2.26 2.54 2.81 3.08 3.36 3.63
) Kohm
0.9
Vadj_up
Adjusted output voltage Vo,adj(V)
3.63
Note: Output voltage Vo=0.90 3V when trim pin is not connected.
VO
Rt
Trim
Rt (Kohm) = (
Vt
Rs (4.64Vt - 3.712)
3.712 - Rs(Vout - 0.903)
) Kohm
Rs
Note: Output voltage Vo=0.90 3V when trim pin is not connected.
GND
Rset =
(
3.712
Vout - 0.903
) Kohm
Vout is desired output voltage.
VO
Rdown
Rup =
(
3.712 Rset
Rset • Vm up - 0.903 Rset - 3.712
) Kohm
Margin up value after output voltage is set with Rset
Trim
Rup
Rset
Rdown =
GND
©2004 Bel Fuse Inc.
Specifications subject to change without notice. 03.04
(
4.64 Rset • Vm down - 3.712 Rset
0.903 Rset + 3.712 - Rset • Vm down
Margin down value after output volatge is set with Rset
Vm down > 90% Vout
Note: Output voltage Vo=0.90 3V when trim pin is not connected.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 16
) Kohm
NON-ISOLATED DC/DC CONVERTERS
12V Input / 0.9V – 5.0V Output / 2A
POWER PRODUCTS
BP04x7AH-02A
Output Voltage Set-Point Adjustment
Trim Up Test Circuit
Vo
Trim
Gnd
x7AH-02A090 Trim Resistor Calculation
Rtrim _ up =
3.712
Kohm
Vo , adj − Vo
where,
Vo is the nominal output voltage setpoint when trim pin is open ,Vo=0.903V
Vo,adj is the adjusted output voltage.
Rtrim-up is the resistance required between TRIM and GND.
Trim resistor value,Rtrim_up (Kohm)
1000
1000 900
800
700
600
500
Rtrimup ( Vadj_up )
400
300
200
100
0
0
0.9 0.909 0.918 0.927 0.936 0.945 0.954 0.963 0.972 0.981 0.99
Vadj_up
Adjusted output voltage Vo,adj(V)
0.9
0.99
©2004 Bel Fuse Inc.
Specifications subject to change without notice. 03.04
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 17
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
12V Input / 0.9V – 5.0V Output / 2A
BP04x7AH-02A
Output Voltage Set-Point Adjustment
Trim Down Test Circuit
Trim Up Test Circuit
Vo
Vo
Trim
Trim
Gnd
Gnd
x7AH-02A120 Trim Resistor Calculation
1.87
Rtrim _ down =
− 4.64 Kohm
Vo − Vo , adj
where,
Vo is the nominal output voltage setpoint when trim pin is open ,Vo=1.203V
Vo,adj is the adjusted output voltage.
Rtrim-down is the resistance required between TRIM and Vo.
Trim resistor value Rtrim_down(Kohm)
100
90
80
70
60
50
40
30
20
10
0
1.08
1.09
1.1
1.21
1.22
1.12 1.13 1.14 1.15 1.16 1.18
Adjusted output voltage Vo,adj (V)
1.19
1.2
1.24 1.25 1.26 1.27 1.28
Adjusted output voltage Vo,adj(V)
1.31
1.32
Rtrim _ up =
3.712
Kohm
Vo , adj − Vo
where,
Vo is the nominal output voltage setpoint when trim pin is open ,Vo=1.203V
Vo,adj is the adjusted output voltage.
Rtrim-up is the resistance required between TRIM and GND.
Trim resistor value,Rtrim_up(Kohm)
500
452
404
356
308
260
212
164
116
68
20
©2004 Bel Fuse Inc.
1.2
1.3
Specifications subject to change without notice. 03.04
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 18
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
12V Input / 0.9V – 5.0V Output / 2A
BP04x7AH-02A
Output Voltage Set-Point Adjustment
x7AH-02A150 Trim Resistor Calculation
3.2633
Rtrim _ down =
− 4.64 Kohm
Vo − Vo , adj
where,
Vo is the nominal output voltage setpoint when trim pin is open ,Vo=1.503V
Vo,adj is the adjusted output voltage.
Rtrim-down is the resistance required between TRIM and Vo.
Trim resistor value Rtrim_down(Kohm)
500
450
400
350
300
250
200
150
100
50
0
1.35
1.37
1.38
1.4 1.41 1.43 1.44 1.46 1.47
Adjusted output voltage Vo,adj (V)
1.49
1.5
3.712
Rtrim _ up =
Kohm
Vo , adj − Vo
where,
Vo is the nominal output voltage setpoint when trim pin is open ,Vo=1.503V
Vo,adj is the adjusted output voltage.
Rtrim-up is the resistance required between TRIM and GND.
Trim resistor value,Rtrim_up(Kohm)
1000
900
800
700
600
500
400
300
200
100
0
1.5
1.51
1.53
1.54 1.56 1.58 1.59 1.61
Adjusted output voltage Vo,adj(V)
©2004 Bel Fuse Inc.
1.62
1.64
1.65
Specifications subject to change without notice. 03.04
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 19
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
12V Input / 0.9V – 5.0V Output / 2A
BP04x7AH-02A
Output Voltage Set-Point Adjustment
x7AH-02A180 Trim Resistor Calculation
Rtrim _ down =
4.6538
− 4.64 Kohm
Vo − Vo , adj
where,
Vo is the nominal output voltage setpoint when trim pin is open ,Vo=1.803V
Vo,adj is the adjusted output voltage.
Rtrim-down is the resistance required between TRIM and Vo.
Trim resistor value Rtrim_down(Kohm)
500
450
400
350
300
250
200
150
100
50
0
1.62 1.64
1.66
1.67 1.69 1.71 1.73 1.75 1.76
Adjusted output voltage Vo,adj (V)
1.78
1.8
1.84
1.85 1.87 1.89 1.91 1.93
Adjusted output voltage Vo,adj(V)
1.96
1.98
3.712
Rtrim _ up =
Kohm
Vo , adj − Vo
where,
Vo is the nominal output voltage setpoint when trim pin is open ,Vo=1.803V
Vo,adj is the adjusted output voltage.
Rtrim-up is the resistance required between TRIM and GND.
Trim resistor value,Rtrim_up(Kohm)
500
450
400
350
300
250
200
150
100
50
0
©2004 Bel Fuse Inc.
1.8
1.82
1.94
Specifications subject to change without notice. 03.04
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 20
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
12V Input / 0.9V – 5.0V Output / 2A
BP04x7AH-02A
Output Voltage Set-Point Adjustment
x7AH-02A250 Trim Resistor Calculation
Rtrim _ down =
7.9117
− 4.64 Kohm
Vo − Vo , adj
where,
Vo is the nominal output voltage setpoint when trim pin is open ,Vo=2.503V
Vo,adj is the adjusted output voltage.
Rtrim-down is the resistance required between TRIM and Vo.
Trim resistor value Rtrim_down(Kohm)
500
450
400
350
300
250
200
150
100
50
0
2.25
2.27
2.3
2.52
2.55
2.33 2.35 2.38 2.4 2.42 2.45
Adjusted output voltage Vo,adj (V)
2.48
2.5
2.73
2.75
Rtrim _ up =
3.712
Kohm
Vo , adj − Vo
where,
Vo is the nominal output voltage setpoint when trim pin is open ,Vo=2.503V
Vo,adj is the adjusted output voltage.
Rtrim-up is the resistance required between TRIM and GND.
Trim resistor value,Rtrim_up(Kohm)
500
450
400
350
300
250
200
150
100
50
0
2.5
2.58 2.6
2.63 2.65 2.67
Adjusted output voltage Vo,adj(V)
©2004 Bel Fuse Inc.
2.7
Specifications subject to change without notice. 03.04
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 21
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
12V Input / 0.9V – 5.0V Output / 2A
BP04x7AH-02A
Output Voltage Set-Point Adjustment
x7AH-02A330 Trim Resistor Calculation
11 .614
Rtrim _ down =
− 4.64 Kohm
Vo − Vo , adj
where,
Vo is the nominal output voltage setpoint when trim pin is open ,Vo=3.303V
Vo,adj is the adjusted output voltage.
Rtrim-down is the resistance required between TRIM and Vo.
Trim resistor value Rtrim_down(Kohm)
500
450
400
350
300
250
200
150
100
50
0
2.97
3
3.04
3.33
3.37
3.07 3.1 3.13 3.17 3.2 3.23
Adjusted output voltage Vo,adj (V)
3.27
3.3
3.6
3.63
Rtrim _ up =
3.712
Kohm
Vo , adj − Vo
where,
Vo is the nominal output voltage setpoint when trim pin is open ,Vo=3.303V
Vo,adj is the adjusted output voltage.
Rtrim-up is the resistance required between TRIM and GND.
Trim resistor value,Rtrim_up(Kohm)
500
450
400
350
300
250
200
150
100
50
0
©2004 Bel Fuse Inc.
3.3
3.4 3.43 3.46 3.5 3.53
Adjusted output voltage Vo,adj(V)
3.56
Specifications subject to change without notice. 03.04
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 22
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
12V Input / 0.9V – 5.0V Output / 2A
BP04x7AH-02A
Output Voltage Set-Point Adjustment
x7AH-02A50x Trim Resistor Calculation
26 .02
Rtrim _ down =
− 13 .69 Kohm
Vo − Vo , adj
where,
Vo is the nominal output voltage setpoint when trim pin is open ,Vo=5.003V
Vo,adj is the adjusted output voltage.
Rtrim-down is the resistance required between TRIM and Vo.
Trim resistor value Rtrim_down(Kohm)
500
450
400
350
300
250
200
150
100
50
0
4.5
4.55
4.6
4.65 4.7 4.75 4.8 4.85
Adjusted output voltage Vo,adj (V)
4.9
4.95
5
5.05
5.1
5.15
5.2
5.25
5.3
5.35
Adjusted output voltage Vo,adj(V)
5.4
5.45
5.5
4.952
Rtrim _ up =
− 7.5 Kohm
Vo, adj − Vo
where,
Vo is the nominal output voltage setpoint when trim pin is open ,Vo=5.003V
Vo,adj is the adjusted output voltage.
Rtrim-up is the resistance required between TRIM and GND.
Trim resistor value,Rtrim_up(Kohm)
500
450
400
350
300
250
200
150
100
50
0
5
©2004 Bel Fuse Inc.
Specifications subject to change without notice. 03.04
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 23
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
12V Input / 0.9V – 5.0V Output / 2A
BP04x7AH-02A
Mechanical
S7AH-02A
0.70
[17.78]
0.60
[15.24]
0.050
[1.27]
0.137
[3.48]
0.320
[8.13]
0.012
[0.30]
2 x 4˚
0.050 ±0.002
[1.27 ±0.05]
0.100
[2.54]
4x
0.400
[10.16]
0.400
[10.16]
0.055
[1.40]
0.020 ±0.002
[0.51 ±0.05]
0.780 [19.81]
0.090
[2.29]
Dimensions are in inches [millimeters].
Standard dimension tolerance is ±0.005 [0.13] unless otherwise noted.
©2004 Bel Fuse Inc.
Pin
Function
1
Remote On/Off
2
+Vin
3
Ground
4
+Vo
5
Trim
6
No Connection
7
No Connection
1
2
3
4
5
7
6
Specifications subject to change without notice. 03.04
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 24
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
12V Input / 0.9V – 5.0V Output / 2A
BP04x7AH-02A
Mechanical
0.700
[17.78]
V7AH-02A
0.050
[1.27]
0.600
[15.24]
0.265
[6.73]
min
0.050 [1.27]
0.100 [2.54]
0.400 [10.16]
0.020
[0.51]
0.137
[3.47]
0.308
[7.82]
Dimensions are in inches [millimeters].
Standard dimension tolerance is ±0.005 [0.13] unless otherwise noted.
Pin
Function
1
Remote On/Off
2
+Vin
3
Ground
4
+Vo
5
Trim
1 2 3 4 5
©2004 Bel Fuse Inc.
Specifications subject to change without notice. 03.04
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
page 25