TCM828ECT Datasheet

IC型號(hào)：
TCM828ECT
PDF描述：
Switched Capacitor Voltage Converters
文件大小：
76.35KB
PDF頁數(shù)：
9頁
芯片廠家：
MICROCHIP

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TCM828

TCM829

Switched Capacitor Voltage Converters

FEATURES

Charge Pump in 5-Pin SOT-23A Package

>95% Voltage Conversion Efficiency

Voltage Inversion and/or Doubling

Low 50

碌

A (TCM828) Quiescent Current

Operates from +1.5V to +5.5V

Up to 25mA Output Current

Only Two External Capacitors Required

GENERAL DESCRIPTION

The TCM828/829 are CMOS 鈥渃harge-pump鈥?voltage

converters in ultra-small 5-Pin SOT-23A packages. They

invert and/or double an input voltage which can range from

+1.5V to +5.5V. Conversion efficiency is typically >95%.

Switching frequency is 12kHz for the TCM828 and 35kHz for

the TCM829.

External component requirement is only two capacitors

(3.3碌F nominal) for standard voltage inverter applications.

With a few additional components a positive doubler can

also be built. All other circuitry, including control, oscillator,

power MOSFETs are integrated on-chip. Supply current

is 50碌A(chǔ) (TCM828) and 115碌A(chǔ) (TCM829).

The TCM828 and TCM829 are available in a 5-Pin

SOT-23A surface mount package.

APPLICATIONS

LCD Panel Bias

Cellular Phones

Pagers

PDAs, Portable Dataloggers

Battery-Powered Devices

PIN CONFIGURATION

*5-Pin SOT-23A

ORDERING INFORMATION

Part No.

Package

5-Pin SOT-23A

Temp. Range

鈥?40擄C to +85擄C

OUT

C+

TCM828ECT

TCM829ECT

NOTE: 5-Pin SOT-23A is equivalent to EIAJ SC-74A.

VIN

TCM828ECT

TCM829ECT

C鈥?/div>

GND

NOTE: *5-Pin SOT-23A is equivalent to EIAJ SC-74A

TYPICAL OPERATING CIRCUIT

Voltage Inverter

鈥?/div>

TCM828

TCM829

OUT

GND

鈥?/div>

OUTPUT

INPUT

漏 2001 Microchip Technology Inc.

DS21488A

TCM828/829-4 5/22/00

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