TCM680CPA 데이터 시트보기 (PDF) - Microchip Technology

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TCM680CPA

+5V To ±10V Voltage Converter

Microchip Technology 

Obsolete Device

TCM680

+5V To ±10V Voltage Converter

Features

• 99% Voltage Conversion Efficiency

• 85% Power Conversion Efficiency

• Input Voltage Range:

- +2.0V to +5.5V

• Only 4 External Capacitors Required

• 8-Pin SOIC Package

Applications

• ±10V From +5V Logic Supply

• ±6V From a 3V Lithium Cell

• Handheld Instruments

• Portable Cellular Phones

• LCD Display Bias Generator

• Panel Meters

• Operational Amplifier Power Supplies

Typical Operating Circuit

+5V

C1+

4.7 µF

C2 +

4.7 µF

GND

C1+ VIN

VOUT+

C1- TCM680

C2+

VOUT-

C2- GND

C4

+ 4.7 µF

VOUT+ = (2 x VIN)

VOUT- = -(2 x VIN)

C3

+ 4.7 µF

GND

General Description

The TCM680 is a dual charge pump, voltage converter

that produces output voltages of +2VIN and -2VIN from

a single input voltage of +2.0V to +5.5V. Common

applications include ±10V from a single +5V logic

supply and ±6V from a +3V lithium battery.

The TCM680 is packaged in 8-pin SOIC and PDIP

packages and requires only four inexpensive, external

capacitors. The charge pumps are clocked by an on-

board 8 kHz oscillator. Low output source impedances

(typically 140 Ω) provide maximum output currents of

10 mA for each output. Typical power conversion effi-

ciency is 85%.

High efficiency, small size and low cost make the

TCM680 suitable for a wide variety of applications that

need both positive and negative power supplies

derived from a single input voltage.

Package Type

PDIP

C1- 1

8 VOUT+

C2+ 2 TCM680CPA 7 C1+

C2- 3 TCM680EPA 6 VIN

VOUT- 4

5 GND

SOIC

C1- 1

8 VOUT+

C2+ 2 TCM680COA 7 C1+

C2- 3 TCM680EOA 6 VIN

VOUT- 4

5 GND

© 2005 Microchip Technology Inc.

DS21486C-page 1

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