19-1225; Rev 3; 9/04
High-Voltage, Low-Power Linear Regulators
for Notebook Computers
____________________________Features
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 thermalshutdown circuitry. The MAX1615/MAX1616 are now
available in lead-free packages.
♦ 4V to 28V Input Range
________________________Applications
_______________Ordering Information
CMOS/RTC Backup Power
Microcontroller Power
Notebook Computers
Smart-Battery Packs
PDAs and Handy-Terminals
Battery-Powered Systems
♦ 8µA (max) Quiescent Supply Current
♦
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