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TC1267 Datasheet(PDF) 4 Page - Microchip Technology

Part # TC1267
Description  400mA PCI LDO
PDF  14 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

TC1267 Datasheet(HTML) 4 Page - Microchip Technology

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TC1267
DS21378B-page 4
© 2002 Microchip Technology Inc.
2.0
PIN DESCRIPTIONS
Thedescriptionsof the pins arelistedinTable2-1.
TABLE 2-1:
PIN FUNCTION TABLE
3.0
DETAILED DESCRIPTION
FIGURE 3-1:
APPLICATION CIRCUIT
Pin No.
Symbol
Description
1VAUX
Auxiliary input supply, nominally 3.3V.
2VIN
Main input supply for the TC1267, nominally 5V.
3
GND
Logic and power ground.
4VOUT
LDO 3.3V output.
5DR
Driver output for external P-channel MOSFET pass element.
5V
3.3V
TAB IS GND
Q1
C3
0.1
µF
C1
4.7
µF
C2
0.1
µF
C4
4.7
µF
3.3V
TC1267
C5
0.1
µF
NOTE: External switch (Q1): use Motorola MGSF1P02ELT1 or equivalent
(PMOS, typical Gate Threshold Voltage = 1V, typical RDS(ON) = 0.4
Ω at VGS = 2.5V)



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