SC1462A

更新时间： 2024-11-19 04:05:35

品牌	Logo	应用领域
商升特 - SEMTECH		泵
页数	文件大小	规格书
9页	182K
描述
High Efficency Charge Pump Doubler

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SC1462A 数据手册

SC1462A

High Efficiency Charge Pump Doubler

POWER MANAGEMENT

Features

Description

The SC1462A is a versatile charge pump designed for use

in battery operated power supply applications over the

wide input range of 1.65 to 5.5 volts. A simple, low quies-

cent current charge pump doubler can be

implemented without costly inductors or capacitors.

Internal MOSFETs and control circuitry eliminate the need

for costly board space and design time. The small 6

lead SOT-23 package helps minimize board space.

uInput supply voltage range of 1.65V to 5.5V

Small size - 6 pin SOT-23 package

Typical efficiency of :

91% @ Vin = 2.5V, Iout = 15mA

uShort circuit and over-temperature protection

u55µA typical input current @ no load

uShutdown current <1µA

uDesigned to work with ceramic or Tantalum capacitors

uFixed frequency of 32kHz

The SC1462A charge pump can be used for applications

that require up to 25mA of output current with V = 2.5V

uAll specifications rated over full temperature range

to 5.5V. Typical dropout voltage (2*Vin)-Vout is shown on

page 8 for several values of Vin.

(-40°C to 85°C)

Applications

Typ ical D ropout Voltage vs Iou t

@ Ta = 25 Deg . C .

800.0E-3

uCellular phones

uHandheld devices

uLCD display

Vin = 1.5 V

700.0E-3

Vin = 2.5 V

Vin = 3.6 V

Vin

= 4.5 V

600.0E-3

500.0E-3

400.0E-3

300.0E-3

200.0E-3

100.0E-3

000.0 E+0

Vin = 5.5 V

000E+0

5E-3

10E-3

15E-3

20E-3

25E-3

30E-3

Io u t (A )

Typical Application Schematic

SC1462A

1uF

www.semtech.com

Revision 1/2001

12 3 4 5 6 7...9

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