X7AH-03H Datasheet, PDF (3/6 Pages) Bel Fuse Inc. – NON-ISOLATED DC/DC CONVERTERS 4.5V-32V Input 1.2V-5.0V/3A Output

NON-ISOLATED DC/DC CONVERTERS
4.5V-32V Input
1.2V-5.0V/3A Output
General Specifications
Parameter
Efficiency
VO=5.0V
VO=3.3V
VO=2.5V
VO=1.8V
VO=1.5V
Vo=1.2V
Switching Frequency
Output Trim Range (narrow trim)
Min
89%
87%
85%
82%
80%
78%
200KHz
90%Vo
Typ
92%
90%
88%
85%
83%
81%
300KHz
-
Max
-
-
-
-
-
400KHz
110%Vo
MTBF
8,120,000 hours
Dimensions (surface mount)
Inches (L × W × H)
Millimeters (L × W × H)
Dimensions (vertical)
Inches (L × W × H)
Millimeters (L × W × H)
Weight
0.78 x 0.70 x 0.32
19.81 x 17.78 x 8.13
0.70 x 0.308 x 0.65
17.78 x 7.82 x 16.51
-
5.1g
-
Notes
Measured at Vin=12V, full load and
Ta=25°C
Calculated Per Bell Core TR-332 (IO =
Nominal; Ta = 25°C)
Control Specifications
Parameter
Min
Typ
Remote On/Off
Signal Low (Unit On)
-0.3V
-
Signal High (Unit Off)
2.8V
-
Max
Notes
1V
Remote on/off pin open, unit on.
12V
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_trimdown
=^A
V_nom − V_adj
−B
Module
Vout
Rtrimdown
Trim
GND
R_trimup
=
V_adj
C
− V_nom
−D
Module
Vout
Trim
GND
Rtrimup
Vnom
5.0
3.3
2.5
1.8
1.5
1.2
A
61.850
53.840
9.556
3.849
3.102
1.794
B
29.400
61.700
15.620
13.830
14.420
10.910
C
11.760
17.200
4.496
3.064
3.536
3.536
D
14.700
40.200
10.000
10.000
10.000
6.490
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel [phone] • Fax [phone] • www.belfuse.com