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MAX682, MAX683, MAX684

3.3V Input to Regulated 5V Output Charge Pumps

Only 1µF Capacitor per 100mA Output
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Status Explanations for product status codes

Part Number Status
MAX682 Active: In Production.
MAX683 This product is No Longer Available. See Ordering Information for recommended replacements.
MAX684 This product is No Longer Available. See Ordering Information for recommended replacements.


The MAX682/MAX683/MAX684 charge-pump regulators generate 5V from a 2.7V to 5.5V input. They are specifically designed to serve as high-efficiency auxiliary supplies in applications that demand a compact design. The MAX682, MAX683, and MAX684 deliver 250mA, 100mA, and 50mA output current, respectively.

These complete 5V regulators require only one resistor and three external capacitors—no inductors are needed. High switching frequencies (externally adjustable up to 2MHz) and a unique regulation scheme allow the use of capacitors as small as 1µF per 100mA of output current. The MAX683/MAX684 are offered in a space-saving 8-pin µMAX package that is only 1.1mm high, while the MAX682 is available in an 8-pin SO.

Data Sheet

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Key Features

  • Ultra-Small: 1µF Capacitors per 100mA of Output Current
  • No Inductors Required
  • 1.1mm Height in µMAX Package (MAX683/MAX684)
  • Up to 250mA Output Current (MAX682)
  • Regulated ±4% Output Voltage
  • 50kHz to 2MHz Adjustable Switching Frequency
  • 2.7V to 5.5V Input Voltage
  • 100µA Quiescent Current in Pulse-Skipping Mode
  • 0.1µA Shutdown Current


  • 3.3V to 5V Local Conversion Applications
  • 3V to 5V GSM SIMM Cards
  • Backup Battery Boost Converters
  • Battery-Powered Applications
  • Flash Memory Supplies
  • Miniature Equipment
  • PCMCIA Cards

Key Specifications:

Charge Pumps
Part Number Topology VIN
Unadj. VOUT
Oper. Freq.
Oper. Temp.
min max max typ See Notes
MAX682  Regulated 2.7 5.5 0.18 5 0.25 1000 -40 to +85 $2.48 @1k
See All Charge Pumps (44)

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.


MAX682, MAX683, MAX684: Typical Operating Circuit
Typical Operating Circuit

Notes and Comments

Regulated 250mA charge pump (MAX682)
Regulated 100mA charge pump (MAX683)
Regulated 50mA charge pump (MAX684)

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Document Ref.: 19-0177 Rev 1; 1998-08-01
This page last modified: 2007-06-01