MAX6778

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


Please check latest availability status for a specific part variant.

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.

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

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
Part NumberFunctionsBattery TypeParameters MeasuredApplicationsBattery ProtectionVSUPPLY
(V)
VSUPPLY
(V)
Package/PinsOper. Temp.
(°C)
Budgetary
Price
minmaxSee Notes
MAX6775 Status Monitor
1 Cell Li-Ion
3-Cell NiMH
Current
Voltage
HostOver Voltage1.65.5
See Data Sheet
-40 to +85$1.26 @1k
See All Battery Monitors, Protectors, and Selectors (51)

Part NumberReset Thresh.
(V)
Reset OuttRESETWatchdog FeatureSupervisor FeaturesReset Thresh. Accur.
(%)
ICC
(µA)
Package/PinsBudgetary
Price
min@ +25°CmaxSee Notes
MAX6775 
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
>=5.5
Active Low
Push-Pull
<1msNo WatchdogPower Fail Comparator/Low Battery Detect17
SC70/5
UDFN/6
-
MAX6776 
Active Low
Open Drain
SC70/5
UDFN/6
$1.24 @1k
MAX6777 
Active Low
Push-Pull
SC70/5
UDFN/6
$1.63 @1k
MAX6778 
Active Low
Open Drain
SC70/5
UDFN/6
$1.24 @1k
See All Supervisors (1 Monitored Voltage) (261)

Part NumberInterfaceReset Thresh.
(V)
Reset OuttRESETWatchdog FeatureSupervisor FeaturesReset Thresh. Accur.
(%)
ICC
(µA)
Package/PinsBudgetary
Price
min@ +25°CmaxSee Notes
MAX6779 R/C Adjustable
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
>=5.5
Active Low
Push-Pull
<1msNo WatchdogPower Fail Comparator/Low Battery Detect17
UDFN/6
$1.63 @1k
MAX6780 
Active Low
Open Drain
UDFN/6
See All Supervisors (2 Monitored Voltages) (73)
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.

Quality and Environmental Data

Product Reliability Reports: MAX6778.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

CAD Symbols and Footprints

  • MAX6778LT+
  • MAX6778LT+T
  • MAX6778XK+
  • MAX6778XK+T
  • 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 >

     
    Status:
    Package:
    Temperature:

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