MAX8880 Datasheet, PDF (1/8 Pages) Maxim Integrated Products – 12V, Ultra-Low-IQ, Low-Dropout Linear Regulators with POK

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’ low 3.5µA supply current extends
battery life in applications with long standby periods.
Unlike PNP-based designs, a 2Ω 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.
________________________Applications
Smoke Detectors
Battery-Powered Alarms
Remote Transmitters
Smart Battery Packs
PDAs
Handy Terminals
CMOS Backup Power
Real-Time Clocks
Pin Configuration
TOP VIEW
IN 1
6 POK
MAX8880
GND 2 _MAX8881 5 SHDN
OUT 3
4 FB
Features
o 3.5µA Supply Current at 12V
o Reverse Battery Protection
o 2.5V to 12V Input Voltage Range
o ±1.5% Output Voltage Accuracy
o 200mA max Output Current
o 2Ω 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
Typical Operating Circuit
V_IN
2.5V TO 12V
1µF
IN
OUT
FB
MAX8881
ON
OFF
SHDN
POK
GND
V_OUT
1.25V TO 5V
UP TO 200mA
4.7µF
REGULATION OK
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°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 SOT23-6
6 SOT23-6
6 SOT23-6
6 SOT23-6
TOP MARK
AAHR
AAHS
AAHT
AAHU
AAHV
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