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SRAH-05E250 Datasheet(PDF) 3 Page - Bel Fuse Inc.

Part # SRAH-05E250
Description  NON-ISOLATED DC/DC CONVERTERS
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Manufacturer  BEL [Bel Fuse Inc.]
Direct Link  http://www.belfuse.com
Logo BEL - Bel Fuse Inc.

SRAH-05E250 Datasheet(HTML) 3 Page - Bel Fuse Inc.

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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
7.0 Vdc - 13.2 Vdc Input
1.2 Vdc - 3.3 Vdc/5 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
88%
86%
84%
82%
80%
91%
89%
87%
85%
83%
-
-
-
-
-
Vin=10 V, full load.
Switching Frequency
200 kHz
280 kHz
360 kHz
Output Voltage Trim Range
90%
-
110%
MTBF
TBD
Calculated Per Bell Core SR-332
(Vin=10 V; Vo=3.3 V; IO =5 A; Ta = 25
°C)
Dimensions (surface mount)
Inches (L × W × H)
Millimeters (L × W × H)
0.78 x 0.7 x 0.32
19.81 x 17.78 x 8.13
Dimensions (vertical)
Inches (L × W × H)
Millimeters (L × W × H)
0.7 x 0.308 x 0.65
17.78 x 7.82 x 16.51
Weight
-
5 g
-
Output Trim Equations
Equations for calculating the trim resistor given the desired adjusted voltage (Vadj) and the nominal output
voltage of the converter (Vo) are shown below. 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.
Output Voltage
A
B
C
D
3.3 V
17.2
40.2
53.841
61.7
2.5 V
4.496
5.62
9.556
11.24
1.8 V
3.064
10
3.849
13.83
1.5 V
3.712
5.62
3.254
10.26
1.2 V
3.712
5.62
1.87
10.26
Note: Vo=3.304 V for 3.3 V output voltage; Vo=1.805 V for 1.8 V output voltage; Vo=1.501 V for 1.5 V output
voltage; Vo=1.203 V for 1.2 V output voltage.
Vout
Trim
GND
Rtrim-up
Module
Vout
Trim
GND
Rtrim-down
Module
Kohm
B
Vo
adj
Vo
A
up
Rtrim
)
,
(
_
=
Kohm
D
adj
Vo
Vo
C
down
Rtrim
)
,
(
_
=


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