MAX16037:Low-Power Battery-Backup Circuits in Small µDFN Packages

Industry's Smallest Supervisors Offer Precision Power-Supply Monitoring with Battery Backup

The MAX16033–MAX16040 supervisory circuits reduce the complexity and number of components required for power-supply monitoring and battery-control functions in microprocessor (µP) systems. The devices significantly improve system reliability and accuracy compared to other ICs or discrete components. The MAX16033–MAX16040 provide µP reset, backup-battery switchover, power-fail warning, watchdog, and chip-enable gating features. The MAX16033–MAX16040 operate from supply voltages up to 5.5V. The factory-set reset threshold voltage ranges from 2.32V to 4.63V. The devices feature a manual-reset input (MAX16033/MAX16037), a watchdog timer input (MAX16034/MAX16038), a battery-on output (MAX16035/MAX16039), an auxiliary adjustable reset input (MAX16036/MAX16040), and chip-enable gating (MAX16033–MAX16036). Each device includes a power-fail comparator and offers an active-low push-pull reset or an active-low open-drain reset. The MAX16033–MAX16040 are available in 2mm x 2mm, 8-pin or 10-pin µDFN packages and are fully specified from -40°C to +85°C.

Key Features
  • Low 1.2V Operating Supply Voltage
  • Precision Monitoring of 5.0V, 3.3V, 3.0V, and 2.5V Power-Supply Voltages
  • Independent Power-Fail Comparator
  • Debounced Manual-Reset Input
  • Watchdog Timer, 1.6s Timeout
  • Battery-On Output Indicator
  • Auxiliary User-Adjustable RESETIN
  • Low 13µA Quiescent Supply Current
  • Two Available Output Structures:
    • Active-Low Push-Pull Reset
    • Active-Low Open-Drain Reset
  • Active-Low Reset Valid Down to 1.2V
  • Power-Supply Transient Immunity
  • 140ms (min) Reset Timeout Period
  • Small 2mm x 2mm, 8-Pin and 10-Pin µDFN Packages
MAX16033, MAX16034, MAX16035, MAX16036, MAX16037, MAX16038, MAX16039, MAX16040: Typical Operating Circuit
MAX16033, MAX16034, MAX16035, MAX16036, MAX16037, MAX16038, MAX16039, MAX16040: Typical Operating Circuit
Applications/Uses
  • Portable/Battery-Powered Equipment
  • POS Equipment
  • Critical µP/µC Power Monitoring
  • Set-Top Boxes
  • Controllers
  • Computers
  • Fax Machines
  • Industrial Control
  • Real-Time Clocks
  • Intelligent Instruments
DataSheet
titleDownload file
MAX16033-MAX16040 Data SheetMAX16033-MAX16040.pdf
Parametrics
Part NumberReset Thresh.
(V)
Reset OutICC
(µA)
Oper. Temp.
(°C)
Package/PinsBudgetary
Price
maxSee Notes
MAX160331.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Active Low
Open Drain
Push-Pull
50-40 to +85µDFN/10$2.16 @1k
MAX16034µDFN/10$3.20 @1k
MAX16035µDFN/10$3.11 @1k
MAX16036µDFN/10$3.11 @1k
MAX16037µDFN/8$2.26 @1k
MAX16038µDFN/8$1.89 @1k
MAX16039µDFN/8$3.11 @1k
MAX16040µDFN/8$1.99 @1k
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX16037LLA23+TActiveµDFN,;8 pin;4.2 mm²-40°C to +85°CLead Free
MAX16037LLA26+TActiveµDFN,;8 pin;4.2 mm²-40°C to +85°CLead Free
MAX16037LLA29+ActiveµDFN,;8 pin;4.2 mm²-40°C to +85°CLead Free
MAX16037LLA29+TActiveµDFN,;8 pin;4.2 mm²-40°C to +85°CLead Free
MAX16037LLA31+TActiveµDFN,;8 pin;4.2 mm²-40°C to +85°CLead Free
MAX16037LLA44+TActiveµDFN,;8 pin;4.2 mm²-40°C to +85°CLead Free
MAX16037LLA46+ActiveµDFN,;8 pin;4.2 mm²-40°C to +85°CLead Free
MAX16037LLA46+TActiveµDFN,;8 pin;4.2 mm²-40°C to +85°CLead Free
MAX16037PLA23+TActiveµDFN,;8 pin;4.2 mm²-40°C to +85°CLead Free
MAX16037PLA26+TActiveµDFN,;8 pin;4.2 mm²-40°C to +85°CLead Free
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX16037PLA29+ActiveµDFN,;8 pin;4.2 mm²-40°C to +85°CLead Free
MAX16037PLA29+TActiveµDFN,;8 pin;4.2 mm²-40°C to +85°CLead Free
MAX16037PLA31+ActiveµDFN,;8 pin;4.2 mm²-40°C to +85°CLead Free
MAX16037PLA31+TActiveµDFN,;8 pin;4.2 mm²-40°C to +85°CLead Free
MAX16037PLA44+TActiveµDFN,;8 pin;4.2 mm²-40°C to +85°CLead Free
MAX16037PLA46+TActiveµDFN,;8 pin;4.2 mm²-40°C to +85°CLead Free
MAX16033-MAX16040.pdf MAX16040
MAX16033-MAX16040_cn.pdf MAX16040
MAX16033-MAX16040_cn.pdf MAX16036