19-1263; Rev 0; 7/97
350mA, 16.5V Input,
Low-Dropout Linear Regulators
The MAX1658/MAX1659 feature a 1µA 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.
____________________________Features
o Wide Input Voltage Range: 2.7V to 16.5V
o Low, 490mV Dropout at 350mA Output Current
(MAX1659)
o 30µA Supply Current
o 1µA Max Shutdown Current
o High-Power (1.2W) 8-Pin SO Package
o Dual Mode Operation Output:
Fixed 3.3V (MAX1658)
Fixed 5.0V (MAX1659)
or Adjustable (1.25V to 16V)
o Thermal Overload Protection
o Current-Limit Protection
o Reverse Battery Protection
________________________Applications
Digital Cordless Phones
______________Ordering Information
PCS Phones
Cellular Phones
PART
TEMP. RANGE
PIN-PACKAGE
PCMCIA Cards
MAX1658C/D
0°C to +70°C
Dice*
Modems
MAX1658ESA
-40°C to +85°C
8 SO
MAX1659C/D
Palmtop Computers
0°C to +70°C
Dice*
MAX1659ESA
Hand-Held Instruments
-40°C to +85°C
8 SO
*Dice are tested at TA = +25°C, DC parameters only.
Electronic Planners
__________Typical Operating Circuit
OUTPUT
3.3V OR 5V,
OR ADJ. (DOWN TO 1.25V);
UP TO 350mA
INPUT
UP TO 16.5V
IN
__________________Pin Configuration
TOP VIEW
OUT
SET
1
SHDN
MAX1658
MAX1659
2
ON
OFF
IN
SHDN
3
8
7
OUT 4
GND
IN
6
IN
5
MAX1658
MAX1659
GND
OUT
SET
SO
Dual Mode is a trademark of Maxim Integrated Products.
________________________________________________________________ Maxim Integrated Products
1
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.
MAX1658/MAX1659
_______________General Description
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.
