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MAX1682

MAX1682

Switched-Capacitor Voltage Doublers

SOT23 Voltage Doubler Needs Only two External Caps; Ultra-Small LCD Supply for PDAs and Cell Phones

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Overview

Description

The ultra-small MAX1682/MAX1683 monolithic, CMOS charge-pump voltage doublers accept input voltages ranging from +2.0V to +5.5V. Their high voltage-conversion efficiency (over 98%) and low operating current (110µA for MAX1682) make these devices ideal for both battery-powered and board-level voltage-doubler applications.

Oscillator control circuitry and four power MOSFET switches are included on-chip. The MAX1682 operates at 12kHz, and the MAX1683 operates at 35kHz. A typical application includes generating a 6V supply to power an LCD display in a hand-held PDA. Both parts are available in a 5-pin SOT23 package and can deliver 30mA with a typical voltage drop of 600mV.
MAX1682, MAX1683: Typical Operating Circuit MAX1682, MAX1683: Typical Operating Circuit Enlarge+

Key Features

  • 5-Pin SOT23 Package
  • +2.0V to +5.5V Input Voltage Range
  • 98% Voltage-Conversion Efficiency
  • 110µA Quiescent Current (MAX1682)
  • Requires Only Two Capacitors
  • Up to 45mA Output Current

Applications/Uses

  • Cell Phones
  • Handy Terminals
  • PDAs
  • Small LCD Panels

Parametric Specs

See parametric specs for Charge Pumps (45)


Part NumberTopologyVIN
(V)		VIN
(V)		ICC
(mA)		Unadj. VOUT
(V)		IOUT
(A)		Oper. Freq.
(kHz)		Oper. Temp.
(°C)		Package/PinsBudgetary
Price
minmaxmaxtypSee Notes
MAX1682 
Doubler
Unregulated
25.50.145+2xVIN0.04512-40 to +85
SOT23/5
$0.75 @1k
MAX1683 0.3135
SOT23/5

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Design Resources

Technical Documents

App Note 4501 Simple Current Limiter Is Programmable
App Note 4500 Negative Step-Down Converter Requires No Inductor
App Note 1876 Doubler/Inverter Charge Pumps Divide by Two
Tutorial 737 Choosing the Right Power-Supply IC for your Application
Tutorial 725 DC-DC Conversion Without Inductors
Tutorial 718 Properties of the Charge-Pump Voltage Splitter

Quality And Environmental

Request Reliability Report for: MAX1682 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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Technical Docs