60mA, SOT23 Inverting Charge Pump with Shutdown

EMI-Friendly Ultra-Small Charge Pump

Please check latest availability status for a specific part variant.


The MAX1697 ultra-small, monolithic, CMOS charge-pump voltage inverter accepts an input voltage ranging from +1.25V to +5.5V. This device features an ultra-low 12Ω output resistance, permitting loads of up to 60mA with maximum efficiency. The MAX1697 is available with operating frequencies of 12kHz, 35kHz, 125kHz, or 250kHz, allowing optimization of supply current or external component size. Its small external components and micropower shutdown mode make this device 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. All versions come in a 6-pin SOT23 package and deliver 60mA.

For applications with lower current requirements, the MAX1719/MAX1720/MAX1721 are pin-compatible SOT23 charge pumps that supply up to 25mA.
MAX1697: Typical Operating Circuit MAX1697: Typical Operating Circuit Enlarge+

Key Features

  • 60mA Output Current
  • Low 12Ω Output Resistance
  • 150µA Supply Current (MAX1697R)
  • Requires Only Two 1µF Capacitors (MAX1697U)
  • Start-Up Current Limited
  • +1.25V to +5.5V Input Voltage Range
  • Slew-Rate Limited to Reduce EMI


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

See parametric specs for Charge Pumps (45)

Part NumberTopologyVIN
Unadj. VOUT
Oper. Freq.
Oper. Temp.
minmaxmaxtypSee Notes
Unregulated to +85
$1.04 @1k

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.
Product Reliability Reports: MAX1697.pdf 
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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