TC1220ECH Datasheet

IC型號：
TC1220ECH
PDF描述：
Switched Capacitor Voltage Converters with Shutdown in SOT P...
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Switched Capacitor Voltage Converters with Shutdown in SOT Packages

Features

鈥?/div>

Charge Pumps in 6-Pin SOT-23A Package

>95% Voltage Conversion Efficiency

Voltage Inversion and/or Doubling

Operates from +2.5V to +5.5V

Up to 25mA Output Current

Only Two External Capacitors Required

Low Power Consumption

Power-Saving Shutdown Mode

TC1220 Compatible with 1.8V Logic Systems

TC1219/TC1220

General Description

The TC1219/TC1220 are CMOS 鈥渃harge-pump鈥?/div>

voltage converters in ultra-small 6-Pin SOT-23A

packages. They invert and/or double an input voltage

which can range from +2.5V to +5.5V. Conversion

efficiency is typically >95%. Switching frequency is

12kHz for the TC1219, 35kHz for the TC1220. When

the shutdown pin is held at a logic low, the device goes

into a very low power mode of operation, consuming

less than 1碌A of supply current.

External component requirement is only two capacitors

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. Typical supply

currents are 60碌A (TC1219), 115碌A (TC1220).

All devices are available in 6-pin SOT-23A surface

mount packages.

Applications

鈥?/div>

LCD Panel Bias

Cellular Phones

Pagers

PDAs, Portable Dataloggers

Battery-Powered Devices

Functional Block Diagram

Device Selection Table

Part

Number

Package

Osc.

Freq.

(kHz)

Operating

Temp.

Range

-40擄C to +85擄C

Negative Voltage Inverter

C+

C鈥?/div>

Input

TC1219ECH 6-Pin SOT-23A

TC1220ECH 6-Pin SOT-23A

TC1219

TC1220

SHDN

OFF

Package Type

6-Pin SOT-23A

C+

SHDN

GND

OUT

GND

V鈥?/div>

Output

TC1219ECH

TC1220ECH

OUT

C鈥?/div>

NOTE:

6-Pin SOT-23A is equivalent to the EIAJ SC-74

錚?/div>

2002 Microchip Technology Inc.

DS21366B-page 1

型號

版本

描述

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