19-1263; Rev 0; 7/97
350mA, 16.5V Input,
Low-Dropout Linear Regulators
_______________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.
____________________________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
MAX1658/MAX1659
________________________Applications
Digital Cordless Phones
PCS Phones
Cellular Phones
PCMCIA Cards
Modems
Hand-Held Instruments
Palmtop Computers
Electronic Planners
______________Ordering Information
PART
MAX1658C/D
MAX1658ESA
MAX1659C/D
MAX1659ESA
TEMP. RANGE
0°C to +70°C
-40°C to +85°C
0°C to +70°C
-40°C to +85°C
PIN-PACKAGE
Dice*
8 SO
Dice*
8 SO
*Dice
are tested at T
A
= +25°C, DC parameters only.
__________Typical Operating Circuit
OUTPUT
3.3V OR 5V,
OR ADJ. (DOWN TO 1.25V);
UP TO 350mA
IN
OUT
__________________Pin Configuration
INPUT
UP TO 16.5V
TOP VIEW
SET
1
2
3
8
7
GND
IN
IN
OUT
MAX1658
MAX1659
ON
OFF
SHDN
GND
SET
SHDN
IN
MAX1658
MAX1659
6
5
OUT
4
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.
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
