TC3684EUATR

更新时间： 2024-10-02 13:14:27

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TC3684EUATR 数据手册

TC3682/TC3683/TC3684

Inverting Charge Pump Voltage Doublers with Active Low Shutdown

Features

General Description

• Small 8-Pin MSOP Package

• Operates from 1.8V to 5.5V

• 120 Ohms (typ) Output Resistance

• 99% Voltage Conversion Efficiency

• Only 3 External Capacitors Required

• Power-Saving Shutdown Mode

• Low Active Supply Current

The TC3682/TC3683/TC3684 are CMOS charge pump

converters that provide an inverted doubled output

from a single positive supply. An on-board oscillator

provides the clock and only three external capacitors

are required for full circuit implementation. Switching

frequencies are 12kHz for the TC3682, 35kHz for the

TC3683, and 125kHz for the TC3684. When the SHDN

pin is held at a logic low, the device goes into a very low

power mode of operation consuming less than 1µA

(typ) of supply current.

- 95µA (typ) for TC3682

- 225µA (typ) for TC3683

Low output source impedance (typically 120Ω), pro-

vides output current up to 10mA. The TC3682/TC3683/

TC3684 feature a 1.8V to 5.5V operating voltage range

and high efficiency, which make them an ideal choice

for a wide variety of applications requiring a negative

doubled voltage derived from a single positive supply

(for example: generation of -7.2V from a +3.6V lithium

cell or -10V generated from a +5V logic supply).

- 700µA (typ) for TC3684

• Fully Compatible with 1.8V Logic Systems

Applications

• LCD Panel Bias

• Cellular Phones PA Bias

• Pagers

The minimum external part count, small physical size

and shutdown mode feature make this family of prod-

ucts useful for a wide variety of negative bias power

supply applications.

• PDAs, Portable Data Loggers

• Battery-Powered Devices

Device Selection Table

Functional Block Diagram

Osc.

Freq.

(kHz)

Operating

Temp.

Range

Part

Number

Package

C1+

Input

TC3682EUA 8-Pin MSOP

TC3683EUA 8-Pin MSOP

-40°C to +85°C

C1–

SHDN

OFF

C2+ TC3682

TC3684EUA 8-Pin MSOP 125

TC3683

TC3684

C2–

Package Type

= -(2 x V )

OUT

GND

8-Pin MSOP

OUT

–

OUT

–

SHDN

C2+

C2–

OUT

C1+

TC3682

TC3683

TC3684

C1 must have a voltage rating ≥ V

C2 and C

must have a voltage rating ≥ 2V

OUT

GND

 2002 Microchip Technology Inc.

DS21556B-page 1

12 3 4 5 6 7...10

中文翻译

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