MAX8875 Datasheet, PDF (1/8 Pages) Maxim Integrated Products – 150mA, Low-Dropout Linear Regulator with Power-OK Output

19-1556; Rev 0; 10/99
150mA, Low-Dropout Linear Regulator
with Power-OK Output
General Description
The MAX8875 low-dropout linear regulator operates from
a +2.5V to +6.5V input range and delivers up to 150mA.
A P-channel MOSFET pass transistor allows its 85µA sup-
ply current to remain independent of the load, making this
device ideal for battery-operated portable equipment
such as PCS phones, cellular phones, cordless phones,
and modems.
The MAX8875 features a power-OK output that indicates
when the output is out of regulation. The device is avail-
able in several preset output voltage versions: 5.0V, 3.3V,
3.0V, 2.7V, or 2.5V. Other features include 1µA (max) shut-
down current, short-circuit protection, thermal shutdown
protection, and reverse-battery protection. The device
comes in a miniature 5-pin SOT23 package.
The MAX8875 is optimized for use with a 1µF ceramic out-
put capacitor. For a pin-compatible, functionally equivalent
device for use with a higher ESR output capacitor, see the
MAX8885 data sheet.
Applications
PCS Telephones
Cellular Telephones
Hand-Held Instruments
Palmtop Computers
Cordless Telephones Electronic Planners
PCMCIA Cards
Modems
Output Voltage Selector Guide
PART
MAX8875EUK25
V_OUT (V)
2.5
TOP MARK
ADKZ
MAX8875EUK27
2.7
ADLA
MAX8875EUK30
3.0
ADLB
MAX8875EUK33
3.3
ADLC
MAX8875EUK50
5.0
ADLD
Note: Other output voltages between 2.5V and 5.0V are avail-
able in 100mV increments—contact the factory for information.
Minimum order quantity is 25,000 units.
Pin Configuration
TOP VIEW
IN 1
5 OUT
MAX8875
GND 2
SHDN 3
4 POK
Features
o Power-OK Output
o Small Output Capacitor (1µF ceramic)
o Preset Output Voltages (±1% accuracy)
o Guaranteed 150mA Output Current
o 85µA No-Load Supply Current
o Low 110mV Dropout at 100mA Load (165mV at
150mA load)
o Thermal-Overload and Short-Circuit Protection
o Reverse-Battery Protection
o 60dB PSRR at 100Hz
o 1µA max Shutdown Current
Ordering Information
PART
TEMP. RANGE PIN-PACKAGE
MAX8875EUK25-T -40°C to +85°C 5 SOT23-5
MAX8875EUK27-T -40°C to +85°C 5 SOT23-5
MAX8875EUK30-T -40°C to +85°C 5 SOT23-5
MAX8875EUK33-T -40°C to +85°C 5 SOT23-5
MAX8875EUK50-T -40°C to +85°C 5 SOT23-5
Note: See Output Voltage Selector Guide for more information.
Typical Operating Circuit
INPUT
+2.5V TO +6.5V
C_IN
1µF
ON
OFF
IN
OUT
MAX8875
SHDN
POK
GND
OUTPUT
PRESET
2.5V TO 5.0V
150mA
C_OUT
1µF
100k
TO µC
SOT23-5
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