nanoPower 4-Bump Comparator in Ultra-Tiny 0.73mm x 0.73mm WLP/SOT23 Packages

Nanopower Comparator Offers Industry's Smallest Package (0.73mm x 0.73mm)

Please check latest availability status for a specific part variant.


The MAX40002–MAX40005 tiny, single comparators are ideal for a wide variety of portable electronics applications such as cell phones, media players, and notebooks that have extremely tight board space and power constraints. These comparators are offered in both, a miniature 4-bump wafer-level package (WLP) with a 0.73mm x 0.73mm footprint (as small as two 0402 resistors) and a 5-pin SOT23 package.

This device family operates with a supply voltage range from 1.7V to 5.5V (either VCC or external VREF), and consumes only 500nA of supply current. These devices have a wide input-voltage range of 0.1V to 5.5V, independent of the supply voltage, and maintain high impedance at the inputs even when powered down (VCC or external VREF = 0V). They also feature internal filtering to provide high RF immunity.

The MAX40002–MAX40003 have open-drain outputs, while the MAX40004–MAX40005 feature push-pull outputs. The MAX40002/MAX40004 have noninverting inputs, while the MAX40003/MAX40005 have inverting inputs (see the Selector Guide for more information).

These devices also come with an internal reference. The reference voltage is preset at the factory and parts are offered with the following voltage options: 0.2V, 0.5V, or 1.222V (see Ordering Information table).

These devices are fully specified over -40°C to +125°C automotive temperature range.
MAX40002, MAX40003, MAX40004, MAX40005: Typical Operating Circuits MAX40002, MAX40003, MAX40004, MAX40005: Typical Operating Circuits Enlarge+

Key Features

  • Tiny 0.73mm x 0.73mm, 4-Bump WLP and 5-Pin SOT23 Packages Save Board Space
  • Ultra-Low 500nA Operating Current Preserves Battery Power in Applications Where Comparator is Constantly Monitoring
  • 1.7V to 5.5V Supply Range Allows Operation from 1.8V, 2.5V, 3V, and 5V Systems
  • Input Voltage Range: 0.1V to 5.5V
  • External REF Range: 1.7V to 5.5V
  • Wide Variety of Factory-Trimmed Reference Voltages Saves Space and Cost of External Reference:
    • 0.2V, 0.5V, 1.222V
    • 9μs Propagation Delay
  • -40°C to +125°C Specified Temperature Range


  • Electronic Toys
  • Mobile Devices
  • Notebook Computers
  • Portable Instrumentation
  • Portable Medical Devices
Part NumberComp-
Input RangeVSUPPLY (Total)
ICC per Comp.
Logic OutOper. Temp.
typminmaxmaxtypmaxSee Notes
MAX40002 19000
Rail to Rail
above Pos. Rail Drain-40 to +125
$0.43 @1k
MAX40003 Open Drain
MAX40004 Push-Pull
MAX40005 Push-Pull
See All Comparators (95)
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.

MAX40002EVKIT: Evaluation Kit for the MAX40002/MAX40003/MAX40004/MAX40005
MAX40003EVKIT: Evaluation Kit for the MAX40002/MAX40003/MAX40004/MAX40005
MAX40004EVKIT: Evaluation Kit for the MAX40002/MAX40003/MAX40004/MAX40005
MAX40005EVKIT: Evaluation Kit for the MAX40002/MAX40003/MAX40004/MAX40005

Technical Documents

App Note 6378 How to Monitor State-of-Charge in Small Batteries with Tiny, Ultra-Low-Power Comparators

Quality and Environmental Data

Request Reliability Report for: MAX40002 
Lead-Free Package Tin (Sn) Whisker Reports

Tools & Models

  • MAX40002 Orcad Library
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    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.

    Quality Management System >
    Environmental Management System >


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