TA8044AF

2002-02-27

3

PIN DESCRIPTION

PIN No.

SYMBOL

DESCRIPTION

1

2

3

OUT1

base of a PNP transistor to this pin. No external transistor is required when using the IC at a

load current of 10mA or less. In this case, connect the power supplies by shorting pins 1, 2, and

3.

4

collector of a PNP transistor to this pin. When used with a load current of 10mA or less, this pin

serves as an output pin for the 3.3V power supply.

5

COMP1

this pin.

6

EN

EN is low. A 50kΩ pull-down resistor is included in GND.

7

GND

Grounded

8

RESET

Power-on reset / watchdog timer reset output pin.

・

・

If no clock is fed to the CK input, this pin generates a reset pulse intermittently.

9

TC

10

CK

Clock input pin for the watchdog timer. If used only as a power-on reset timer, pull up this input

11

becomes abnormal, the Zener diode suppresses the voltage.

12

COMP2

and this pin.

13

the reset timer block.

14

OUT2

This pin is used to connect the base of an external PNP transistor. The output voltage is

controlled by an internal op-amp to maintain it stably at 5V. Since the recommended current of

120 or more.

15

between pins 15 and 16 is monitored. The current limiter is actuated when the voltage drop

exceeds 0.3V.

Ex. ) When the current limiter need to be actuated at a load current of 600mA

Rs = 0.3V / 600mA = 0.5Ω

16

Power supply input pin.

circuit.