HT7660(1999) 데이터 시트보기 (PDF) - Holtek Semiconductor

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HT7660
(Rev.:1999)

CMOS Switched-Capacitor Voltage Converter

Holtek Semiconductor 

Pin Assignment

BO O ST

CAP+

VSS

CAP-

1

8 VDD

2

7 O SC

3

6 LV

4

5 VO UT

H T7660

8 D IP /S O P

HT7660

Pin Description

Pin No. Pin Name

1 BOOST

2 CAP+

3 VSS

4 CAP-

5 VOUT

6 LV

7 OSC

8 VDD

I/O

Internal

Connection

Description

I

CMOS

Pull-low

Higher switching frequency selection input

O

CMOS

This pin is connected to the positive terminal of Ca-

pacitor C1 for a charge pump

¾

¾

Negative power supply, ground

O

NMOS

This pin is connected to the negative terminal of Ca-

pacitor C1 for a charge pump

This pin is connected to the negative terminal of Ca-

O

NMOS pacitor C2 for charge reservoir. Output voltage pass

through this pin

Floating this pin enables the voltage regulator. Con-

I

¾

nect this pin to VSS (Ground) to bypass voltage reg-

ulator and improve low voltage operation

I/O

Transmission

Gate

External clock input pin. This pin can be connected

with an external capacitor to reduce switching fre-

quency

¾

¾

Positive power supply

2

November 30, 1999

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