MAX1615:High-Voltage, Low-Power Linear Regulators for Notebook Computers

High-Input-Voltage, Low-Cost, Low-Power, Low-Dropout Linear Regulators for Notebooks in SOT23-5

The MAX1615/MAX1616 are micropower, SOT23-5 linear regulators that supply always-on, keep-alive power to CMOS RAM and microcontrollers (µCs) in systems with high-voltage batteries. Key features include wide input voltage range, low dropout voltage, and low quiescent supply current. Despite a miserly 8µA (max) no-load supply current, the MAX1615/MAX1616 have excellent line-transient response and AC power-supply rejection ratio. They provide a clean, fixed 5V or 3.3V output (MAX1615) or an adjustable 1.24V to 28V output (MAX1616), even when subjected to fast supply-voltage changes that occur during the switchover from battery to AC adapter input power. The space-saving SOT23-5 package has excellent thermal characteristics and tolerates up to 571mW of power dissipation. Fault protection is provided by internal foldback current limiting and thermal-shutdown circuitry. The MAX1615/MAX1616 are now available in lead-free packages.

Key Features
  • 4V to 28V Input Range
  • 8µA (max) Quiescent Supply Current
  • <1µA Shutdown Supply Current
  • 3.3V or 5V, Pin-Selectable Output (MAX1615) Adjustable 1.24V to 28V Output (MAX1616)
  • 30mA Output Current
  • ±2% Initial Output Accuracy
  • Thermal-Overload Protection
  • 5-Pin SOT23 Package
  • Low Cost
MAX1615, MAX1616: Typical Operating Circuit
MAX1615, MAX1616: Typical Operating Circuit
Applications/Uses
  • Battery-Powered Systems
  • CMOS/RTC Backup Power
  • Microcontroller Power
  • Notebook Computers
  • PDAs and Handy-Terminals
  • Smart Battery Packs/Chargers
DataSheet
titleDownload file
MAX1615-MAX1616 Data SheetMAX1615-MAX1616.pdf
Parametrics
Part NumberRegulatorsVIN
(V)
VIN
(V)
Adj. VOUT
(V)
Adj. VOUT
(V)
VDROPOUT @Rated ILOAD
(V)
Rated ILOAD
(mA)
Rated ILOAD
(mA)
ICC
(µA)
Low Batt./ Pwr. Fail OutWatchdogReverse Batt. Protect.Oper. Temp.
(°C)
Package/PinsBudgetary
Price
minmaxminmaxtypmaxSee Notes
MAX161514283.350.3530308NoNoNo-40 to +85SOT/5$1.31 @1k
MAX16161.2428SOT/5
Quality and Environmental Data
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX1615EUKNo Longer AvailableMAX1615EUK+SOT,;5 pin;9 mm²-40°C to +85°CNo
MAX1615EUK+ActiveSOT,;5 pin;9 mm²-40°C to +85°CLead Free
MAX1615EUK+TActiveSOT,;5 pin;9 mm²-40°C to +85°CLead Free
MAX1615EUK-TNo Longer AvailableMAX1615EUK+TSOT,;5 pin;9 mm²-40°C to +85°CNo
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