Datasheet > HT7660

HT7660

更新时间： 2024-11-07 22:48:27

品牌	Logo	应用领域
台湾合泰/盛群 - HOLTEK		转换器开关
页数	文件大小	规格书
9页	100K
描述
CMOS Switched-Capacitor Voltage Converter

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HT7660 数据手册

HT7660

CMOS Switched-Capacitor Voltage Converter

Features

No external diode required

Typically with no load voltage conversion,

99.9% efficiency

Simple conversion of V_DDto -V_DD

Cascade connection (two devices are

connected, V_OUT= -2 V_DD

)

Typical power efficiency is 98%

Wide operating voltage range: 3V to 12V

Boost pin for higher switching frequency

Easy to use

Requires only two external capacitors

Applications

RS-232 power supply

Operation amplifier supply

Data acquisition systems

Positive voltage doubler

On board negative supply for dynamic

RAMS

Supply voltage splitter, V_O= ± V_DD/2

General Description

HT7660 is a monolithic CMOS switched-capaci-

tor voltage converter. HT7660 is designed to

complete a voltage conversion from positive to

negative. The only required external compo-

nentsaretwolowcostelectrolyticcapacitors.

The frequency of an RC oscillator can be low-

ered by adding an external capacitor between

V_DDand the OSC pin, or an external clock can

be connected to the OSC pin to replace the origi-

nal oscillator. The LV terminal may be tied to

VSS to disable the voltage regulator. By doing

this, low voltage operation can be improved.

HT7660 includes a voltage regulator, an RC os-

cillator and four output power MOS switches.

Block Diagram

VDD

CAP+

OSC

Oscillator

Voltage

Level Shifter

BOOST

CAP

VOUT

Voltage

Regulator

Logic

Network

VSS

November 30, 1999

12 3 4 5 6 7...9

中文翻译

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