350mA, 16.5V Input, Low-Dropout Linear Regulators

 

Part Number	Replacement	Explanation

Description

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The MAX1658/MAX1659 linear regulators maximize battery life by combining ultra-low supply currents and low dropout voltages. They feature Dual Mode™ operation, which presets the output to 3.3V (MAX1658) or 5V (MAX1659), or permits it to be adjusted between 1.25V and 16V. The regulator supplies up to 350mA, with a typical dropout of 650mV for the MAX1658 and 490mV for the MAX1659. With their p-channel MOSFET pass transistor, these devices maintain a low quiescent current from zero output current to the full 350mA, even in dropout. They support input voltages ranging from 2.7V to 16.5V.

The MAX1658/MAX1659 feature a 1µA shutdown mode, reverse battery protection, short-circuit protection, and thermal shutdown. They are available in a special high-power (1.2W), 8-pin SO package designed specifically for compact applications.

MAX1658, MAX1659: Typical Operating Circuit Enlarge+

Key Features

• Wide Input Voltage Range: 2.7V to 16.5V
• Low, 490mV Dropout at 350mA Output Current (MAX1659)
• 30µA Supply Current
• 1µA Max Shutdown Current
• High-Power (1.2W) 8-Pin SO Package
• Dual Mode Operation Output:
  • Fixed 3.3V (MAX1658)
  • Fixed 5.0V (MAX1659)
  • or Adjustable (1.25V to 16V)
• Thermal Overload Protection
• Current-Limit Protection
• Reverse Battery Protection

Applications/Uses

• Cell Phones
• Digital Cordless Phones
• Electronic Planners
• Handheld Instruments (PDAs, Palmtops)
• Modems
• Palmtop Computers
• PCMCIA Cards
• PCS Phones