TC105_13 Datasheet, PDF (3/14 Pages) Microchip Technology – PFM/PWM Step-Down DC/DC Controller

TC105
2.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1: PIN FUNCTION TABLE
Pin No.
(5-Pin SOT-23A)
1
2
3
4
5
Symbol
EXT
V_DD
GND
SHDN
V_OUT
Description
Switch transistor control output. This terminal connects to the gate of an external P-channel
MOSFET (or to the base of an external PNP transistor through a current limiting resistor).
Power supply voltage input.
Ground terminal.
Shutdown input (active low). The device enters a low power shutdown state when this input is
brought low. During shutdown, regulator action is suspended, and supply current is reduced to
less than 0.5A. The device resumes normal operation when SHDN is again brought high.
Voltage sense input. This input senses output voltage for regulation and must be connected to the
output voltage node as shown in the application schematic in this data sheet.
 2001-2012 Microchip Technology Inc.
DS21349C-page 3