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P3576_18 Datasheet(PDF) 5 Page - Unisonic Technologies

Part No. P3576_18
Description  2A PWM BUCK DC/DC CONVERTER
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Maker  UTC [Unisonic Technologies]
Homepage  http://www.utc-ic.com
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P3576
LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD
5 of 6
www.unisonic.com.tw
QW-R103-054.G
T Y PI CAL APPLI CAT I ON CI RCU I T
VIN=12V
C1
470
μF
C2
0.1
μF
C3
470
μF
C6
0.1
μF
D1
3A/40V
R1
4.7K
R2
1.5K
47
μH
L1
1
2
2
1
3
4
5
6
7
8
VSS
VSS
VSS
VSS
VCC
SW
FB
EN
UTC P3576
U1
VOUT=5.0V/2A
(1) Adjustable Output Voltage Version
VIN=12V
C1
470
μF
C2
0.1
μF
C3
470
μF
C6
0.1
μF
D1
2A/40V
R1
1.8K
R2
1.8K
33
μH
L1
1
2
2
1
3
4
5
6
7
8
VSS
VSS
VSS
VSS
VCC
SW
FB
EN
UTC P3576
U1
VOUT=2.5V/2A
ON/OFF
C4
0.1
μF
R3
100K
(2) Adjustable Output Voltage Version With Delayed Startup
VOUT=VFB×(1+R1/R2), VFB=1.23V, R2=0.47K ~ 3K
Table 1 Resistor select for output voltage setting
VOUT
R2
R1
1.5K
4.7K
5V
1.8K
5.6K
1.5K
2.5K
3.3V
1.8K
3.0K
2.5V
1.8K
1.8K
1.8V
1.8K
0.82K
L1 recommend value (IOUT=2A)
VOUT
2.5V
3.3V
5V
12V
VIN=12V
33
μH
33
μH
47
μH
NA
VIN=24V
33
μH
33
μH
47
μH
68
μH




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