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Low-Power, 1%-Accurate Battery Monitor in µDFN and SC70 Packages

Product Details

Key Features

Parametric specs for Supervisors (1 Monitored Voltage)
Reset Thresh. (V) 1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
>=5.5
Reset Thresh. Accur. (%) (@ +25°C) 1
Reset Out Active Low
Open Drain
tRESET (min) <1ms
Watchdog Feature No Watchdog
Supervisor Features Power Fail Comparator/Low Battery Detect
ICC (µA) (max) 7
Package/Pins SC70/5
UDFN/6
Budgetary
Price (See Notes)
1.38
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Simplified Block Diagram

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Parameters

Parametric specs for Supervisors (1 Monitored Voltage)
Reset Thresh. (V) 1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
>=5.5
Reset Thresh. Accur. (%) (@ +25°C) 1
Reset Out Active Low
Open Drain
tRESET (min) <1ms
Watchdog Feature No Watchdog
Supervisor Features Power Fail Comparator/Low Battery Detect
ICC (µA) (max) 7
Package/Pins SC70/5
UDFN/6
Budgetary
Price (See Notes)
1.38
Parametric specs for Supervisors (1 Monitored Voltage)
Reset Thresh. (V) 1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
>=5.5
Reset Thresh. Accur. (%) (@ +25°C) 1
Reset Out Active Low
Open Drain
tRESET (min) <1ms
Watchdog Feature No Watchdog
Supervisor Features Power Fail Comparator/Low Battery Detect
ICC (µA) (max) 7
Package/Pins SC70/5
UDFN/6
Budgetary
Price (See Notes)
1.38

Key Features

  • 1.0%-Accurate Threshold Specified Over Temperature
  • Single/Dual, Low-Battery Output Options
  • Low 3µA Battery Current
  • Open-Drain or Push-Pull Low-Battery Outputs
  • Fixed or Adjustable Hysteresis
  • Low-Input Leakage Current Allows Use of Large Resistors
  • Guaranteed Valid Low-Battery-Output Logic State Down to VBATT = 1V
  • Immune to Short Battery Transients
  • Fully Specified from -40°C to +85°C
  • Small 5-Pin SC70 or Ultra-Small 6-Pin µDFN (1mm x 1.5mm) Package

Applications/Uses

  • Battery-Powered Systems (Single-Cell Li+ or Multicell NiMH, NiCd, Alkaline)
  • Cell Phones/Cordless Phones
  • Electronic Toys
  • MP3 Players
  • Pagers
  • PDAs
  • Portable Medical Devices

Description

The MAX6775–MAX6781 low-power, 1%-accurate battery monitors are available in the ultra-small µDFN package (1.0mm x 1.5mm) and SC70 packages. These low-power devices are ideal for monitoring single lithium-ion (Li+) cells, or multicell alkaline/NiCd/NiMH power sources. These devices offer single (MAX6775/MAX6776/MAX6777/MAX6778) or dual (MAX6779/MAX6780/MAX6781) low-battery outputs and feature fixed or resistor-adjustable hysteresis. Hysteresis eliminates the output chatter sometimes associated with battery voltage monitors, usually due to input-voltage noise or battery terminal voltage recovery after load removal.

These devices are available in several versions: with single- or dual-voltage monitors, and with fixed or adjustable hysteresis. The MAX6775/MAX6776 offer a single battery monitor and factory-set hysteresis of 0.5%, 5%, or 10%. The MAX6779/MAX6780/MAX6781 have two battery monitors in a single package and factory-set hysteresis of 0.5%, 5%, or 10%. The MAX6777/MAX6778 offer a single battery monitor with external inputs for the rising and falling thresholds, allowing external hysteresis control.

For convenient interface with system power circuitry or microprocessors, both open-drain and push-pull outputs are available. The single-channel devices are available with open-drain or push-pull outputs. The dual-channel devices are available with both outputs open-drain, both outputs push-pull, or one of each (see the Selector Guide in the full data sheet). This family of devices is offered in small 5-pin SC70 and ultra-small 6-pin µDFN packages, and is fully specified over the -40°C to +85°C extended temperature range.

Simplified Block Diagram

MAX6775, MAX6776, MAX6777, MAX6778, MAX6779, MAX6780, MAX6781: Typical Operating Circuit MAX6775, MAX6776, MAX6777, MAX6778, MAX6779, MAX6780, MAX6781: 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 .