HA1835P/HA1848P

2

Pin Arrangement

1

2

3

4

5

6

7

RES

RES

CS

Comp *

Vadj

14

13

12

11

10

9

8

P-RUN

Rf

Cf

Vout

GND

(Top View)

Note: HA1848P: 9 pin is non connection.

Pin Functions

Pin No.

Symbol

Functions

1R

R

Reset pulse width depends on resistance connected to R

R

Recommended range: 100 k

Ω to 1 MΩ

2C

R

Reset pulse width depends on capacitance connected to C

R

3

P-RUN

Clock pulse input terminal for watchdog timer

4

Rf

Frequency band width of filter circuit depends on resistance connected to Rf

Recommended range: 100 k

Ω to 500 kΩ

5

Cf

Frequency band width of filter circuit depends on capacitance connected to Cf

6

Vout

Connect to external PNP transistor's collector: This pin supplies 5 V regulated

voltage for internal circuit

7

GND

Ground

8

Vadj

Output voltage fine tuning terminal

9

Comp

Phase compensation terminal: Connect less than 100 pF capacitor between V

CC

and Comp. HA1848P is non connection

10

V

CONT

External PNP transistor's base control terminal

11

V

CC

Supply voltage terminal: Operating supply voltage range is 6 V to 30 V

12

CS

Connect current sense resistor, which protects the external PNP transistor,

between V

13

RES *

Reset pulse output terminal for low level reset type microcomputer

14

RES *

Reset pulse output terminal for high level reset type microcomputer

Note:

RES and RES are open-collector output terminals, so connect a pull-up resistor of about 5 k

Ω.