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SC70 Inverting Charge Pumps with Shutdown

SC70 Inverting Charge Pump with Shutdown

Product Details

Key Features

Parametric specs for Charge Pumps
Topology Inverter
Unregulated
VIN (V) (min) 2.5
VIN (V) (max) 5.5
IOUT (A) (typ) 0.03
Unadj. VOUT (V) -VIN
IQ (mA) (max) 0.32
Switching Frequency (kHz) 200
Oper. Temp. (°C) -40 to +85
Package/Pins SC70/6
Budgetary
Price (See Notes)
0.8
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Simplified Block Diagram

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Parameters

Parametric specs for Charge Pumps
Topology Inverter
Unregulated
VIN (V) (min) 2.5
VIN (V) (max) 5.5
IOUT (A) (typ) 0.03
Unadj. VOUT (V) -VIN
IQ (mA) (max) 0.32
Switching Frequency (kHz) 200
Oper. Temp. (°C) -40 to +85
Package/Pins SC70/6
Budgetary
Price (See Notes)
0.8

Key Features

  • 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

Applications/Uses

  • Battery-Powered Applications
  • GaAsFET Bias Supplies
  • Handy-Terminals, PDAs
  • Negative Supply from +5V or +3.3V Logic Supplies
  • Small LCD Panels

Description

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.

Simplified Block Diagram

MAX1852, MAX1853: Typical Operating Circuit MAX1852, MAX1853: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .