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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

Product Details

Key Features

Applications/Uses

Parametric specs for Linear Regulators
VIN (V) (min) 4
VIN (V) (max) 28
Adj. VOUT (V) (min) 3.3
Adj. VOUT (V) (max) 5
Rated ILOAD (mA) 30
# Regulators 1
VDROPOUT @Rated ILOAD (V) (typ) 0.35
ICC (µA) (max) 8
Low Batt./ Pwr. Fail Out No
Watchdog No
Reverse Batt. Protect. No
Oper. Temp. (°C) -40 to +85
Package/Pins SOT23/5
Budgetary
Price (See Notes)
1.38
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Simplified Block Diagram

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Parameters

Parametric specs for Linear Regulators
VIN (V) (min) 4
VIN (V) (max) 28
Adj. VOUT (V) (min) 3.3
Adj. VOUT (V) (max) 5
Rated ILOAD (mA) 30
# Regulators 1
VDROPOUT @Rated ILOAD (V) (typ) 0.35
ICC (µA) (max) 8
Low Batt./ Pwr. Fail Out No
Watchdog No
Reverse Batt. Protect. No
Oper. Temp. (°C) -40 to +85
Package/Pins SOT23/5
Budgetary
Price (See Notes)
1.38

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

Applications/Uses

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

Description

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.

Simplified Block Diagram

MAX1615, MAX1616: Typical Operating Circuit MAX1615, MAX1616: Typical Operating Circuit Zoom icon

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .