Data Sheet

6

Rev. 1.2, 2008-10-28

TLE 4473 GV55-2

Table 1

Pin Definitions and Functions

Pin No. Symbol Function

1WI

Watchdog input; input for watchdog pulses, positive edge

triggered.

2RO1

Reset and watchdog output for Q1; open collector output.

Connect to pull-up resistor.

3RO2

Reset output 2; open collector output. Connect to pull-up resistor.

4Q2

Stand-by regulator output voltage; block to GND with a capacitor

C

5N.C.

Internally not connected; connect to GND.

6Q1

Main regulator output voltage; output voltage tracked to Q2

voltage; block to GND with a capacitor

C

10 kHz

7I

Input voltage; block to ground directly at the IC with a ceramic

capacitor.

8INH1

Inhibit input 1; low level disables Q1, integrated pull-down resistor.

9INH2

Inhibit input 2; low level at INH2 and INH1 disables Q2 and Q1,

integrated pull-down resistor.

10

D1

Reset Delay 1; connect to ground via a capacitor to set reset delay

for Q1.

11

D2

Reset Delay 2; connect to ground via a capacitor to set reset delay

and watchdog timing for Q2.

12

GND

Ground; connect to heatslug.

Heatslug

Interconnect with PCB heatsink area and GND.