MD3221N 查看數據表（PDF） - Unspecified
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MD3221N Datasheet PDF : 26 Pages
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7 Application Circuit Examples
5V input, 2.5V output, 3A
300Hz operating frequency, R / C, LC : OFF
● Application Circuit Example
Vi : 5V
C1:
68μF +
G
C4 : 0.1μF
HSU119
C3 : 0.1μF
C7:
1μF
C2:
0.01μF
7
24
Vboot
VB
18~21 VDD
6 VCC
32 S/S
1 R/C
MD3221N
VOUT 11~14
OCL+ 25
OCL- 27
ampOUT 28
5 LC
Vref
2
OSC
3
amp- 29
ampIN 30
2.5V/3.3V 31
GND
4,26
P.GND P.GND
1
2
8
16
R3:
100kΩ
C6:
1000pF
C8 : 1μF
L1 : 4.7μH
VO : 2.5V/3A
D2 : D1FM3
+
C5:
330μF×2
G
◆Component Examples
Component code
C1
C2
C3
C4
C5
C6
C7
C8
D1
D2
L1
R3
Type
High-polymer organic semiconductor electrolytic condenser
Ceramic condenser
Ceramic condenser
Ceramic condenser
High-polymer organic semiconductor electrolytic condenser
Ceramic condenser
Ceramic condenser
Ceramic condenser
Switching diode
Schottky barrier diode
Inductor
Resistor
Rating
10V, 68μF, Irip.1.7A
25V, 0.01μF
25V, 0.1μF
25V, 0.1μF
6.3V, 330μF, ESR：40mΩ× 2P
25V, 1000pF
10V, 1μF
10V, 1μF
HSU119〔80V, 300mA, VF=1.2V 〕 (max)
D1FM3〔30V, 3A, VF=0.4V 〕 (max)
4.7μH
100kΩ
17
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