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

DataSheet

Parametrics

Quality and Environmental Data

• MAX1615.pdf

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