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TC7662BCOA713

Charge pump DC-DC, 1.5-15V inverting, 20mA, 96% efficiency, SOIC-8

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Manufacturer Part：

TC7662BCOA713

Package：

SOIC-8 (4.9 x 3.91 x 1.42 mm)

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Description

Product Overview

The TC7662BCOA713 from Microchip is a charge pump DC-to-DC voltage converter that generates negative supply from positive input using only two external capacitors, as an upgraded replacement for ICL7660.

Key Specifications

Manufacturer Microchip Technology
Topology Charge Pump (Inverting/Doubling)
Input Voltage 1.5V to 15V
Output Voltage -VIN or 2xVIN
Output Current 20 mA
Quiescent Current 180 µA typical
Oscillator Frequency 10 kHz (boost to 35kHz)
Efficiency 96% (typical)
Power Dissipation 470 mW
External Components 2 capacitors only
Package SOIC-8
Operating Temperature 0°C to +70°C

Features

  • Converts +1.5V to +15V to negative voltage
  • Only 2 external capacitors required
  • No inductors needed
  • 96% power efficiency
  • Boost pin for 35kHz operation (smaller caps)
  • External oscillator option
  • Pin-compatible ICL7660 upgrade
  • Voltage doubling mode available

Applications

  • Op-amp negative supply generation
  • LCD contrast adjustment
  • Data acquisition systems
  • Battery-powered instruments

The TC7662BCOA713 from Microchip is a charge pump DC-to-DC voltage converter that generates a negative supply from a positive 1.5V to 15V input using only two external capacitors. As a pin-compatible upgrade to the industry-standard ICL7660, it features 96% power efficiency, 20mA output current, and a boost pin that increases oscillator frequency to 35kHz for smaller capacitor values. Supports both voltage inverting and doubling modes.

The TC7662B uses a switched-capacitor charge pump. Internal switches connect a ‘flying’ capacitor alternately to the input (charging phase) and to the output with reversed polarity (transfer phase). The on-chip oscillator drives the switching at 10kHz (35kHz with boost). In inverting mode, the output is -VIN. In doubling mode, the output is +2VIN. The conversion is performed without inductors, eliminating EMI concerns.

Pin Name Function
1 BOOST Frequency boost (tie to V+ for 35kHz)
2 CAP+ Positive terminal of flying cap
3 GND Ground
4 CAP- Negative terminal of flying cap
5 VOUT Negative voltage output
6 LV Low-voltage mode (tie to GND for VIN<3V)
7 OSC Oscillator control / external cap
8 V+ Positive supply input
  • Op-amp negative rail generation
  • LCD display contrast voltage
  • Instrumentation negative supply
  • Battery-powered dual-supply circuits
Manufacturer Part Number Notes
Microchip TC7660BCOA Original version, lower efficiency
TI LMC7660IN ICL7660 compatible
ADI ADM660ARZ Similar charge pump
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