MAX1615

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


Application

CMOS/RTC Backup Power
Microcontroller Power
Notebook Computers
Smart-Battery Packs
PDAs and Handy-Terminals
Battery-Powered Systems


Pinout




Specifications

IN to GND ............................................................-0.3V to 30V
Terminal Voltages to GND
SHDN to GND...........................................-0.3V to (VIN + 0.3V)
5/3 to GND ..........................................-0.3V to (VOUT + 0.3V)
FB (MAX1616) to GND  .........................-0.3V to (VOUT + 0.3V)
OUT to GND..........................................................-0.3V to 30V
OUT Short-Circuit to GND ...............................................30sec
Continuous OUT Current.................................................40mA
Continuous Power Dissipation (TA = +70°C) (Note 1)
SOT23-5 (derate 7.1mW/°C above +70°C)...............571mW
Operating Temperature Range
MAX161_EUK-T  ............................................-40°C to +85°C
Storage Temperature Range ......................-65°C to +160°C
Lead Temperature (soldering, 10sec) ........................+300°C


Description

The MAX1615/MAX1616 are micropower, SOT23-5 lin-ear 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.