GM7230 Datasheet, PDF (7/12 Pages) List of Unclassifed Manufacturers – 3A STEP-DOWN VOLTAGE REGULATOR

Figure 1(b). Adjustable Output Voltage Versions
Unregulated
DC Input
+V_IN
GM 7230-ADJ
1
GND 3
+
C_IN
ON/ OFF 5
Feedback
4
Output
L1
2
D1
+
C_OUT
GM7230
Power Management
V_OUT=5.0V
R2
L
O
A
D
R1
R2
V_OUT = V_REF ( 1 + _R1 )
V_OUT
R2 = R1 ( _VREF -1)
where V_REF = 1.23V, R1 aproximetly 1kW, 1%
C_IN - 470 µF, 50V, Aluminum Electrolytic
C_OUT - 220 µF, 25V, Aluminum Electrolytic
D1 - 5A, 40V Schottky
L1 - 68 µH, 3L Electronic Corp. TC-680M-3A-5026
R1 - 1k , 1%
V_OUT = 5V, R2 = 3.06k , 1%
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