MAX1658/MAX1659
350mA, 16.5V Input,
Low-Dropout Linear Regulators
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 transis-
tor, 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.
Applications
●● Digital Cordless Phones
●● PCS Phones
●● Cellular Phones
●● PCMCIA Cards
●● Modems
●● Hand-Held Instruments
●● Palmtop Computers
●● Electronic Planners
Typical Operating Circuit
INPUT
UP TO 16.5V
IN
OUT
MAX1658
MAX1659
OUTPUT
3.3V OR 5V,
OR ADJ. (DOWN TO 1.25V);
UP TO 350mA
ON
OFF
SHDN
GND
SET
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
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 TA = +25°C, DC parameters only.
+Denotes a lead(Pb)-free/RoHS-compliant package.
Pin Configuration
TOP VIEW
SET 1
SHDN 2
IN 3
OUT 4
MAX1658
MAX1659
8 GND
7 IN
6 IN
5 OUT
SO
Dual Mode is a trademark of Maxim Integrated Products.
19-1263; Rev 1; 5/14