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
4.5 13.2V Input / 1.0 3.3V Output / 6A
Compact surface mount package
High efficiency means less power dissipation
Remote on/off
Extra wide input voltage range
Ideal for Intermediate Bus Architecture applications
Description
The S/V7AH-06E Series are non-isolated step down DC/DC converters
that operate from with an extra wide input range (4.5V to 13.2V). This allows them to operate from a nominal 5V
or 12V source or from an unregulated source such as a bus converter in an Intermediate Bus Architecture
application. These modules are available in a range of output voltages from 1.0V to 3.3V. They are offered in a
compact ovemolded package rated at 6A. Optional lead-forming provides a vertical mount product for minimal
footprint or a surface mount option for very low profile. Standard features include remote on/off, over current
protection and output voltage adjust. These products maybe used almost anywhere low-voltage silicon is being
employed and a nominal 5 12V source is available. Typical applications include file servers, routers, line
cards, and other computing and communications equipment.
Part Selection
Output
Voltage
Input
Voltage
Max. Output
Current
Max. Output
Power
Typical
Efficiency*
Part Number
Surface Mount
Part Number
Vertical Mount
3.3V
4.5 13.2V
6A
19.8W
90%
S7AH-06E330
V7AH-06E330
2.5V
4.5 13.2V
6A
15.0W
88%
S7AH-06E250
V7AH-06E250
1.8V
4.5 13.2V
6A
10.8W
85%
S7AH-06E180
V7AH-06E180
1.5V
4.5 13.2V
6A
9.0W
84%
S7AH-06E150
V7AH-06E150
1.2V
4.5 13.2V
6A
7.2W
82%
S7AH-06E120
V7AH-06E120
* Typical Efficiency at Vin= 8V (slightly higher for Vin = 5V, slightly lower for Vin = 12V)
Input Specifications
Parameter
Min
Typ
Max
Notes
Input Voltage Range
4.5 VDC
13.2 VDC
Input Current (no load)
50mA
Input Current (full load)
5.7A
Reflected Ripple Current
60mA
rms
150mA pk-pk
120mA rms
250mA pk-pk
With a simulated source
impedance of 500nH, 5Hz to
20 MHz
Output Specifications
Parameter
Min
Typ
Max
Notes
Voltage Adjustability
90% 110%
Output Current
0A
6A
Setpoint Accuracy
-2.5%
+2.5%
Total Regulation
-2.0%
+2.0%
Includes line, load and
temperature.
Ripple and Noise
100mV pk-pk
50mV rms
0 to 20MHz Bandwidth
Use 1.0uF ceramic and 10uF
Aluminum on output
S7AH-06E / V7AH-06E Series PRELIMINARY
2003 Bel Fuse Inc. Specifications subject to change without notice. 060303
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
4.5 13.2V Input / 1.0 3.3V Output / 6A
Output Specifications (continued)
Parameter
Min
Typ
Max
Notes
Transient Response
3.3V / 2.5V
1.8V / 1.5V / 1.2V
200mV / 150uS
160mV / 150uS
Max dev / recovery time
di/dt = 0.5A/uS, Vin =8VDC
Ta = 25
C, 50-100% load
change with 220uF external
capacitance.
General Specifications
Parameter
Specification
Switching Frequency
400kHz typical (fixed)
Dimensions
inches
mm
0.7 x 0.65 x 0.32
17.78 x 16.51 x 8.13
Weight 6.2
g
Operating Temperature
-40
C to 85C
Non-Operating Temperature
-40
C to 100C
Protection Features
Short circuit
Over current
Latching shutdown
130% to 250% max Io
Remote On/Off
Signal Low (OFF)
Signal High (ON)
-0.3 to 1.3V
3.5 to 6.5V
Pin Connections
Pin
Function
1 On/Off
2 Vin
3 Ground
4 Vout
5 Trim
S7AH-06Exxx
V7AH-06Exxx
b e l
b e l
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
4.5 13.2V Input / 1.0 3.3V Output / 6A
Derating Guidelines
Output Trim Equations
Vnom A B C D
3.3V 168.70 152.80 37.14 90.90
1.8V 74.95 152.80 37.14 90.90
D
V
V
C
R
B
V
V
A
R
nom
adj
TrimUp
adj
nom
TrimDown
-
-
=
-
-
=
Equations for calculating the trim resistor (in k) given the desired adjusted voltage (Vadj) and
the nominal output voltage of the converter (Vnom) are shown below. The Trim Down resistor
should be connected between the Trim pin and Vout. The Trim Up resistor should be connected
between the Trim pin and Ground. Only one of the resistors should be used for any given
application.
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