SC1464

更新时间： 2024-11-18 22:43:27

品牌	Logo	应用领域
商升特 - SEMTECH		泵
页数	文件大小	规格书
10页	107K
描述
60mA PROGRAMMABLE FIXED FREQUENCY CHARGE PUMP DOUBLER

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中文翻译

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SC1464 数据手册

60mA PROGRAMMABLE FIXED

FREQUENCY CHARGE PUMP DOUBLER

SC1464

PRELIMINARY - August 11, 2000

TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com

DESCRIPTION

FEATURES

The SC1464 is a versatile charge pump designed for

use in battery operated power supply applications. A

simple, low current charge pump doubler can be imple-

mented without costly inductors or capacitors. Internal

MOSFET’s and control circuitry eliminate the need for

costly board space and design time. The small device

footprint allows for compact circuit design.

= Small size - MSOP-8 package

= Typical efficiency of 90% @ full load

= Designed to work with ceramic or tantalum

capacitors

= Soft start functionality

= Short-Circuit and Over-Temperature protection

= <55µA input current @ no load (TF1=0;TF2=1)

= <330µA input current @ no load (TF1=0;TF2=0)

= Oscillator frequency accurate to ±5%

= Shutdown current < 1µA

The SC1464 charge pump can be used for applications

that require up to 60mA of output current with V_IN

2.85V and V_OUT= 5.2V. The small 8 lead MSOP-8

package helps minimize board space.

= All Specifications rated over the full temperature

range (-40°C to 85 °C)

The TF1 and TF2 pins provide binary control of the

oscillator frequency to either 1 MHz, 260kHz, 32kHz or

8kHz. The user can change the frequency during oper-

ation with extremely fast settling time.

APPLICATIONS

= Cellular phones

= Handheld devices

= PDA power supplies

= Peripheral card supplies

ORDERING INFORMATION

Part Number⁽¹⁾

Package

SC1464CMS.TR

MSOP-8

Note:

(1) Only available in tape and reel packaging. A reel

contains 2500 devices.

APPLICATION CIRCUIT

SC1464

Vin =3 V +/- 5%

Vo =5.2 V to 6.2 V

Vin

Logic Input or Vin

TF1

TF2

C+

CBucket

TF1

TF2

Cin

Cout

C-

Iout

Freq

Cin

Cout

CBucket

3.3uF

1.0uF

0.22uF

3.3uF

1.0uF

0.22uF

2.2uF

0.22uF

0.10uF

60mA

20mA

60mA

20mA

260kHz

1MHz

652 MITCHELL ROAD NEWBURY PARK CA 91320

12 3 4 5 6 7...10

中文翻译

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