19-1679; Rev 2; 12/07
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’ low 3.5µA supply current extends bat-
tery life in applications with long standby periods. Unlike
PNP-based designs, a 2Ω PMOS device maintains 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) com-
parator 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).
The devices are
available in 6-pin SOT23 and 6-pin TDFN packages.
♦
3.5µA Supply Current at 12V
♦
Reverse Battery Protection
♦
2.5V to 12V Input Voltage Range
♦
±1.5% Output Voltage Accuracy
♦
200mA max Output Current
♦
2Ω PMOS Output Device
♦
Short-Circuit and Thermal Overload Protection
♦
POK Output for Out-of-Regulation Indicator
♦
Fixed 1.8V, 2.5V, 3.3V, and 5V (MAX8881)
Adjustable from 1.25V to 5V (MAX8880)
♦
Tiny 6-Pin SOT23 Package
♦
Thin 6-Pin TDFN Package
Features
MAX8880/MAX8881
________________________Applications
Smoke Detectors
Battery-Powered Alarms
Remote Transmitters
Smart Battery Packs
PDAs
Handy Terminals
CMOS Backup Power
Real-Time Clocks
Pin Configurations
TOP VIEW
IN
1
6
POK
POK SHDN
6
5
IN
4
Typical Operating Circuit
V
IN
2.5V TO 12V
1μF
V
OUT
1.25V TO 5V
UP TO 200mA
4.7μF
IN
OUT
FB
GND
2
MAX8880
MAX8881
5
SHDN
MAX8880
ON
1
2
3
MAX8881
REGULATION OK
SHDN
GND
POK
OUT
3
4
FB
FB
GND OUT
TDFN
3mm x 3mm
OFF
SOT23-6
Ordering Information
PART
MAX8880EUT-T
MAX8880ETT-T
MAX8881EUT18-T
MAX8881EUT25-T
MAX8881EUT33-T
MAX8881EUT50-T
OUTPUT
Adjustable
Adjustable
1.8V
2.5V
3.3V
5.0V
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
6 SOT23-6
6 TDFN
6 SOT23-6
6 SOT23-6
6 SOT23-6
6 SOT23-6
TOP MARK
AAHR
AGS
AAHS
AAHT
AAHU
AAHV
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim's website at www.maxim-ic.com.
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
