19-1679; Rev 0; 4/00
12V, Ultra-Low-I
Q
, Low-Dropout
Linear Regulators with POK
General Description
The MAX8880/MAX8881 are ultra-low supply current,
low-dropout linear regulators, capable of delivering up
to 200mA. They are designed for battery-powered
applications where reverse battery protection and long
battery life are critical.
These regulators鈥?low 3.5碌A supply current extends
battery life in applications with long standby periods.
Unlike PNP-based designs, a 2鈩?PMOS device main-
tains ultra-low supply current throughout the entire
operating range and in dropout. The parts are internally
protected from output short circuits, reverse battery
connection, and thermal overload. An internal power-
OK (POK) comparator indicates when the output is out
of regulation.
The MAX8880 output is adjustable from 1.25V to 5V
using an external resistor-divider. The MAX8881 pro-
vides only factory-preset output voltages of 1.8V, 2.5V,
3.3V, or 5V (see
Ordering Information).
Both devices
are available in miniature 6-pin SOT23 packages.
o
3.5碌A Supply Current at 12V
o
Reverse Battery Protection
o
2.5V to 12V Input Voltage Range
o
卤1.5% Output Voltage Accuracy
o
200mA max Output Current
o
2鈩?PMOS Output Device
o
Short-Circuit and Thermal Overload Protection
o
POK Output for Out-of-Regulation Indicator
o
Fixed 1.8V, 2.5V, 3.3V, and 5V (MAX8881)
Adjustable from 1.25V to 5V (MAX8880)
o
Tiny 6-Pin SOT23 Package
Features
MAX8880/MAX8881
________________________Applications
Smoke Detectors
Battery-Powered Alarms
Remote Transmitters
Smart Battery Packs
PDAs
Handy Terminals
CMOS Backup Power
Real-Time Clocks
Typical Operating Circuit
Pin Configuration
TOP VIEW
IN
1
6
POK
V
IN
2.5V TO 12V
1碌F
IN
OUT
FB
V
OUT
1.25V TO 5V
UP TO 200mA
4.7碌F
MAX8881
ON
OFF
REGULATION OK
SHDN
GND
POK
GND
2
MAX8880
MAX8881
5
SHDN
OUT
3
4
FB
SOT23-6
Ordering Information
PART
MAX8880EUT-T
MAX8881EUT18-T
MAX8881EUT25-T
MAX8881EUT33-T
MAX8881EUT50-T
OUTPUT
Adjustable
1.8V
2.5V
3.3V
5.0V
TEMP. RANGE
-40掳C to +85掳C
-40掳C to +85掳C
-40掳C to +85掳C
-40掳C to +85掳C
-40掳C to +85掳C
PIN-PACKAGE
6 SOT23-6
6 SOT23-6
6 SOT23-6
6 SOT23-6
6 SOT23-6
TOP MARK
AAHR
AAHS
AAHT
AAHU
AAHV
________________________________________________________________
Maxim Integrated Products
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For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
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