X7AH-03C1A0 Datasheet, PDF (5/8 Pages) Bel Fuse Inc. – NON-ISOLATED DC/DC CONVERTERS 3.3V Input 0.9V-2.5V/3A Output

NON-ISOLATED DC/DC CONVERTERS
3.3V Input 0.9V-2.5V/3A Output
Output Trim Equations
Equations for calculating the trim resistor (in kΩ) 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.
R = ^A −B
V − V ^trimdown
nom
adj
Module
Vout
Trim
GND
Rtrimdown
R = ^C −D
V − V ^trimup
adj
nom
Module
Vout
Trim
GND
Rtrimup
Vnom
0.9 – 2.5
2.5
1.8
1.5
1.2
0.9
A
N/A
7.9117
4.6538
3.2633
1.8699
N/A
B
N/A
16.14
20.84
16.14
11.45
N/A
C
3.712
3.712
3.712
3.712
3.712
3.712
D
Notes
1.54
Vo=0.9V when Rtrim is open
11.5
Vo=2.505V when Rtrim is open
16.2
Vo=1.803V when Rtrim is open
11.5
Vo=1.503V when Rtrim is open
6.81
Vo=1.203V when Rtrim is open
33.2
Vo=0.903V when Rtrim is open
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