Features: ` Wide Input Voltage Range: 2.7V to 16.5V
` Low, 490mV Dropout at 350mA Output Current (MAX1659)
` 30A Supply Current
` 1A 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 ProtectionApplication ·Digital Cordless Phones
·PCS Phones
·Cellular Phones
·PCMCIA Cards
·Modems
·Hand-Held Instruments
·Palmtop Computers
·Electronic PlannersPinout
SpecificationsIN to GND................................................................-17V to +17V
Continuous Output Current..............................................500mA
Output Short-Circuit Duration ..........................................Infinite
SET, SHDN to GND .................................................-17V to +17V
OUT to GND.................................................-0.3V to (VIN + 0.3V)
Continuous Power Dissipation (Note 1)
SO (derate 14.5mW/°C above +70°C) ..............................1.2W
Operating Temperature Range
MAX1658ESA/MAX1659ESA ...............................-40°C to +85°C
Junction Temperature.....................................................+150°C
Storage Temperature Range ...........................-65°C to +160°C
Lead Temperature Range (soldering, 10sec)..................+300°C
Note 1: See Operating Region and Power Dissipation section.
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
DescriptionThe 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 1A shutdown mode, reverse battery protection, short-circuit protection, and thermal shutdown. They are available in a special highpower (1.2W), 8-pin SO package designed specifically for compact applications.
MAX1658 Data Sheet
