_______________General Description
The MAX1658/MAX1659 linear regulators maximize bat-
tery 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 cur-
rent 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.
________________________Applications
Digital Cordless Phones
PCS Phones
Cellular Phones
PCMCIA Cards
Modems
Hand-Held Instruments
Palmtop Computers
Electronic Planners
____________________________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
MAX1658/MAX1659
350mA, 16.5V Input,
Low-Dropout Linear Regulators
________________________________________________________________
Maxim Integrated Products
1
__________Typical Operating Circuit
19-1263; Rev 0; 7/97
PART
MAX1658C/D
MAX1659C/D
0°C to +70°C
0°C to +70°C
TEMP. RANGE PIN-PACKAGE
Dice*
Dice*
______________Ordering Information
Dual Mode is a trademark of Maxim Integrated Products.
MAX1658ESA -40°C to +85°C 8 SO
MAX1659ESA -40°C to +85°C 8 SO
*
Dice are tested at T
A
= +25°C, DC parameters only.
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.