19-1679; Rev 2; 12/07
12V, Ultra-Low-IQ, Low-Dropout
Linear Regulators with POK
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 battery life in applications with long standby periods. Unlike
PNP-based designs, a 2Ω PMOS device maintains ultralow 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 provides 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.
Features
♦ 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
________________________Applications
Smoke Detectors
Battery-Powered Alarms
Remote Transmitters
Smart Battery Packs
PDAs
Handy Terminals
CMOS Backup Power
Real-Time Clocks
Pin Configurations
TOP VIEW
POK SHDN
6
IN 1
6
5
Typical Operating Circuit
IN
4
POK
VIN
2.5V TO 12V
IN
OUT
FB
1μF
GND 2
MAX8880
MAX8881
SHDN
4
OUT 3
5
FB
MAX8881
MAX8880
ON
1
SOT23-6
2
VOUT
1.25V TO 5V
UP TO 200mA
4.7μF
OFF
3
REGULATION OK
SHDN
POK
GND
FB
GND OUT
TDFN
3mm x 3mm
Ordering Information
OUTPUT
TEMP RANGE
PIN-PACKAGE
TOP MARK
MAX8880EUT-T
PART
Adjustable
-40°C to +85°C
6 SOT23-6
AAHR
MAX8880ETT-T
Adjustable
-40°C to +85°C
6 TDFN
AGS
AAHS
MAX8881EUT18-T
1.8V
-40°C to +85°C
6 SOT23-6
MAX8881EUT25-T
2.5V
-40°C to +85°C
6 SOT23-6
AAHT
MAX8881EUT33-T
3.3V
-40°C to +85°C
6 SOT23-6
AAHU
MAX8881EUT50-T
5.0V
-40°C to +85°C
6 SOT23-6
AAHV
________________________________________________________________ Maxim Integrated Products
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.
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MAX8880/MAX8881
General Description
