MAX1852

PRODUCTION

SC70 Inverting Charge Pumps with Shutdown

SC70 Inverting Charge Pump with Shutdown

Data Sheet (Rev. 0) Product Selection Table
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Overview

  • 30mA Output Current
  • Low 15Ω Output Resistance
  • 68µA Supply Current (MAX1852)
  • Requires Only Two 0.68µF Capacitors (MAX1853)
  • +2.5V to +5.5V Input Voltage Range
  • 0.1µA Logic-Controlled Shutdown
  • Two Switching Frequencies
    • 50kHz (MAX1852)
    • 200kHz (MAX1853)
  • Slew-Rate Limited to Reduce EMI
  • Ultra-Small 6-Pin SC70 Package

The MAX1852/MAX1853 monolithic, CMOS charge-pump voltage inverters in the ultra-small SC70 package feature a low 15Ω output resistance, permitting loads up to 30mA with maximum efficiency. The MAX1852/MAX1853 are available with operating frequencies of 50kHz and 200kHz, respectively, allowing optimization of supply current or external component size. Small external components and micropower shutdown mode make these devices ideal for both battery-powered and board-level voltage conversion applications.

Oscillator control circuitry and four power-MOSFET switches are included on-chip. Applications include generating a negative supply from a +5V or +3.3V logic supply to power analog circuitry. Both versions come in a 6-pin SC70 package that is 40% smaller than a SOT23.

Applications

  • Battery-Powered Applications
  • GaAsFET Bias Supplies
  • Handy-Terminals, PDAs
  • Negative Supply from +5V or +3.3V Logic Supplies
  • Small LCD Panels
MAX1852
SC70 Inverting Charge Pumps with Shutdown
MAX1852, MAX1853: Typical Operating Circuit
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Documentation

Data Sheet 1

Reliability Data 1

Design Note 1

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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

  • MAX1852
LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

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