BEL V7AH

NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
3.3V Input / 1.2V – 2.5V Output / 5A
BP02x7AH-05C
S7AH-05C / V7AH-05C 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
Description
The Bel S7AH-05C and V7AH-05C modules are a series of non-isolated, step down DC/DC power converters that operate
from a nominal 3.3V source. These converters are available in a range of output voltages from 1.2V to 2.5V. They are packaged in a compact, overmolded package rated at 5A. 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, and output voltage adjust. These products may be used almost anywhere low voltage silicon is employed and a
3.3V source is available. Typical applications include file servers, routers, line cards and other computing and communications
equipment.
Applications
•
Distributed power architectures
•
Data networking equipment
•
Telecommunications
•
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
2.5V
3.3V
5A
12.5W
91%
S7AH-05C250
V7AH-05C250
1.8V
3.3V
5A
9.0W
88%
S7AH-05C180
V7AH-05C180
1.5V
3.3V
5A
7.5W
86%
S7AH-05C150
V7AH-05C150
1.2V
3.3V
5A
6W
83%
S7AH-05C120
V7AH-05C120
©2002 Bel Fuse Inc.
Specifications subject to change without notice. 11.02
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
3.3V Input / 1.2V – 2.5V Output / 5A
BP02x7AH-05C
Absolute Maximum Ratings
Parameter
Max
Unit
-0.3
6
V
Vouten
-0.3
6
V
Ambient Temperature
Tamb
-40
85
°C
Storage Temperature
Tstor
-40
105
°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
3
Input Current
Typical
Max
Units
3.6
V
Iin
No Load Input Current
A
2.5V
1.8V
1.5V
1.2V
4.8
4.0
3.5
3.0
All
90
mA
3
10
mA
Remote Off Input Current
Input Reflected Ripple Current1
All
30
45
mArms
Input Reflected Ripple Current (P-P)1
All
100
150
mApk
I2t Inrush Current Transient
All
0.0005
0.001
A2s
Turn On Voltage Threshold
All
2.7
V
Turn Off Voltage Threshold
All
2.6
2.5
V
Note: Input capacitance 270µF/16V, ESR = 0.03 Ω max at 100kHz @ 25° C.
1. With simulated source impedance of 500nH, 5Hz to 20MHz.
©2002 Bel Fuse Inc.
Specifications subject to change without notice. 11.02
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
3.3V Input / 1.2V – 2.5V Output / 5A
BP02x7AH-05C
Output Specifications
Parameter
Module
Output Voltage Set Point 1
Symbol
Min
Typical
Max
2.450
1.764
1.470
1.176
2.500
1.800
1.500
1.200
2.550
1.836
1.530
1.224
Units
Vout
2.5V
1.8V
1.5V
1.2V
V
Load Regulation
All
5
10
mV
Line Regulation
All
3
5
mV
Regulation Over Temperature
All
20
30
mV
Total Output Voltage Regulation
All
11
20
mV
Output Ripple and Noise 2
All
30
80
mVp-p
Output Ripple and Noise 2
All
10
20
mVrms
Output Current Range
All
Iout
0
5
A
Output DC Current Limit
All
Ioutlim
6
10
A
Shor t Circuit Surge
A 2s
Ioutsurge
2.5V
1.8V
1.5V
1.2V
Turn on Time
All
Overshoot at Turn On
All
Output Capacitance
All
Ton
Cout
0.07
0.07
0.07
0.07
0.1
0.1
0.1
0.1
7
15
ms
0
1
%
2200
µF
80
170
mV
80
120
µs
80
170
mV
80
120
µs
0
Transient Response 3
∆V 50% to 100% of Max Load
Settling Time
Ts
All
∆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.
1. Vin = 3.3V, Iout = full load, Ta = 25° C.
2. 0 - 20MHz, 1µF ceramic cap and 10µF aluminum cap on output.
3. di/dt = 0.5A/1µS, Ta = 25° C without external load capacitance.
©2002 Bel Fuse Inc.
Specifications subject to change without notice. 11.02
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
3.3V Input / 1.2V – 2.5V Output / 5A
BP02x7AH-05C
General Specifications
Parameter
Module
Symbol
Min
Typical
89
86
84
81
91
88
86
83
570
600
Max
Units
η
Efficiency1
%
2.5V
1.8V
1.5V
1.2V
Switching Frequency
All
Fsw
kHz
630
Output Voltage Trim Range2
%
2.5V
1.8V
1.5V
1.2V
Weight
90
90
90
90
105
110
110
110
4.9
All
g
1. Vin=3.3V, full load and Ta=25° C.
2. See graphs on pages 10-12.
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
1.8
3.6
V
3. With remote on/off pin 1 open, the module is on.
©2002 Bel Fuse Inc.
Specifications subject to change without notice. 11.02
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
3.3V Input / 1.2V – 2.5V Output / 5A
BP02x7AH-05C
Efficiency Data
Module 1.8V
Module 2.5V
94%
96%
Efficiency
3.0V
92%
3.3V
90%
3.6V
Efficiency
92%
94%
90%
3.0V
88%
3.3V
86%
3.6V
84%
88%
82%
86%
1
2
3
4
1
5
2
Module 1.5V
88%
3.0V
86%
3.3V
84%
3.6V
82%
80%
4
Efficiency
Efficiency
90%
3
5
Module 1.2V
92%
2
4
Output Current
Output Current
1
3
89%
88%
87%
86%
85%
84%
83%
82%
81%
80%
79%
78%
5
Output Current
3.0V
3.3V
3.6V
1
2
3
4
5
Output Current
Note: On/off pin designed to work with an open collector/drain switch.
©2002 Bel Fuse Inc.
Specifications subject to change without notice. 11.02
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 5
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
3.3V Input / 1.2V – 2.5V Output / 5A
BP02x7AH-05C
Ripple and Noise
1µF ceramic cap and 10µF aluminum cap added at the output.
Ripple and noise at full load and 3.3Vdc input,
2.5Vdc output and Ta=25° C
Ripple and noise at full load and 3.3Vdc input,
1.5Vdc output and Ta=25° C
©2002 Bel Fuse Inc.
Ripple and noise at full load and 3.3Vdc input,
1.8Vdc output and Ta=25° C
Ripple and noise at full load and 3.3Vdc input,
1.2Vdc output and Ta=25° C
Specifications subject to change without notice. 11.02
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
3.3V Input / 1.2V – 2.5V Output / 5A
POWER PRODUCTS
BP02x7AH-05C
Transient Response
Transient response: di/dt = 0.5A/µS, no external load capacitance
Vout=2.5V
50% to 100% load transients at 3.3V input and Ta=25° C
Vout=2.5V
100% to 50% load transients at 3.3V input and Ta=25° C
Vout=1.8V
50% to 100% load transients at 3.3V input and Ta=25° C
Vout=1.8V
100% to 50% load transients at 3.3V input and Ta=25° C
©2002 Bel Fuse Inc.
Specifications subject to change without notice. 11.02
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 7
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
3.3V Input / 1.2V – 2.5V Output / 5A
BP02x7AH-05C
Transient Response
Transient response: di/dt = 0.5A/µS, no external load capacitance
Vout=1.5V
50% to 100% load transients at 3.3V input and Ta=25° C
Vout=1.5V
100% to 50% load transients at 3.3V input and Ta=25° C
Vout=1.2V
50% to 100% load transients at 3.3V input and Ta=25° C
Vout=1.2V
100% to 50% load transients at 3.3V input and Ta=25° C
©2002 Bel Fuse Inc.
Specifications subject to change without notice. 11.02
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
3.3V Input / 1.2V – 2.5V Output / 5A
POWER PRODUCTS
BP02x7AH-05C
Thermal Considerations
S7AH-05C
V7AH-05C
©2002 Bel Fuse Inc.
Specifications subject to change without notice. 11.02
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 9
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
3.3V Input / 1.2V – 2.5V Output / 5A
BP02x7AH-05C
Output Voltage Set-Point Adjustment
Trim Down Test Circuit
Trim Up Test Circuit
Vo
Trim
Gnd
Vo
Trim
Gnd
Output Voltage Set-Point Adjustment
x7AH-05C250 Trim Resistor Calculation
Rtrim down =
Rtrim up =
(
©2002 Bel Fuse Inc.
(
9.5565
– 20.32) Kohm
Vo – Vo, adj
4.496
– 14.7) Kohm
Vo, adj – Vo
Specifications subject to change without notice. 11.02
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
POWER PRODUCTS
3.3V Input / 1.2V – 2.5V Output / 5A
BP02x7AH-05C
Output Voltage Set-Point Adjustment
x7AH-05C180 Trim Resistor Calculation
Rtrim down =
Rtrim up =
(
(
3.8488
– 18.54) Kohm
Vo – Vo, adj
3.064
– 14.7) Kohm
Vo, adj – Vo
x7AH-05C150 Trim Resistor Calculation
Rtrim down =
Rtrim up =
(
(
2.6977
– 15.33) Kohm
Vo – Vo, adj
3.064
– 11.5) Kohm
Vo, adj – Vo
©2002 Bel Fuse Inc.
Specifications subject to change without notice. 11.02
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
3.3V Input / 1.2V – 2.5V Output / 5A
BP02x7AH-05C
Output Voltage Set-Point Adjustment
x7AH-05C120 Trim Resistor Calculation
Rtrim down =
Rtrim up =
(
©2002 Bel Fuse Inc.
(
0.8501
– 6.79) Kohm
Vo – Vo, adj
1.72
– 4.64) Kohm
Vo, adj – Vo
Specifications subject to change without notice. 11.02
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
POWER PRODUCTS
3.3V Input / 1.2V – 2.5V Output / 5A
BP02x7AH-05C
Mechanical
S7AH-05C
Suggested PCB Pad Layout
0.400
[10.16]
0.60
[15.24]
0.065 [1.65]
0.110
[2.79]
0.855
[21.72]
0.050
[1.27]
R0.015
[R0.38] typ
0.70
[17.78]
R0.008
[R0.20] typ
0.100 [2.54]
0.012
[0.30]
0˚-5˚
0.004 [0.10]
0.050
[1.27]
0.100
[2.54]
4x
0.400
[10.16]
0.320
[8.13] 0.020
[0.51]
0.055 [1.40] 2x
0.090 [2.29] 2x
0.780
[19.81]
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
6
No Connection
7
No Connection
7
6
1 2 3 4 5
©2002 Bel Fuse Inc.
Specifications subject to change without notice. 11.02
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 13
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
3.3V Input / 1.2V – 2.5V Output / 5A
BP02x7AH-05C
Mechanical
0.700
[17.78]
V7AH-05C
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]
0.308
[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
©2002 Bel Fuse Inc.
Specifications subject to change without notice. 11.02
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 14