X7AH-01H1A0 Datasheet, PDF (3/6 Pages) Bel Fuse Inc. – NON-ISOLATED DC/DC CONVERTER 4.5V-32V Input 1.2V-3.3V/1A Output

NON-ISOLATED DC/DC CONVERTER
4.5V-32V Input
1.2V-3.3V/1A Output
General Specifications
Parameter
Efficiency
VO=3.3V
VO=2.5V
VO=1.8V
VO=1.5V
VO=1.2V
Switching Frequency
VO=3.3V
VO=2.5V
VO=1.8V
VO=1.5V
VO=1.2V
Output Trim Range
MTBF
Dimensions (surface mount)
Inches (L × W × H)
Millimeters (L × W × H)
Dimensions (vertical)
Inches (L × W × H)
Millimeters (L × W × H)
Weight
Min
Typ
Max
83%
86%
-
80%
83%
-
76%
79%
-
73%
76%
-
70%
73%
-
270KHz
190KHz
150KHz
130KHz
100KHz
1.2V
290KHz
220KHz
170KHz
150KHz
120KHz
-
310KHz
250KHz
190KHz
170KHz
140KHz
3.3V
8,040,000 hours
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=20V, full load.
Vo=1.2V when trim pin open.
Calculated Per Bell Core TR-332 (IO
=0.8A, Vin=20V; Ta = 25°C)
Note: All specifications are typical at 20V input, full load at 25°C unless otherwise stated.
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 (Vo) 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
= ^8.7
V_o −V_adj
− 21.5
Module
Vout
Trim
GND
Rtrimdown
R_TrimUp
=
17.2
V_adj −V_o
Note: Output voltage Vo=1.205V
Module
Vout
Trim
GND
Rtrimup
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel [phone] • Fax [phone] • www.belfuse.com