19-1556; Rev 1; 12/00
150mA, Low-Dropout Linear Regulator
with Power-OK Output
General Description
Features
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.
o Power-OK Output
o Small Output Capacitor (1µF ceramic)
o Preset Output Voltages ( 1ꢀ accuracꢁ)
o Guaranteed 150mA Output Current
o 85µA No-Load Supplꢁ Current
o Low 110mV Dropout at 100mA Load (165mV at
150mA load)
The MAX8875 features a power-OK (POK) output that indi-
cates when the output is out of regulation. The device is
available in several preset output voltage versions: 5.0V,
3.3V, 3.0V, 2.7V, 2.5V, or 1.5V. Other features include 1µA
(max) shutdown current, short-circuit protection, thermal
shutdown protection, and reverse-battery protection. The
device comes in a miniature 5-pin SOT23 package.
o Thermal-Overload and Short-Circuit Protection
o Reverse-Batterꢁ Protection
o 60dB PSRR at 100Hz
o 1µA max Shutdown Current
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.
Ordering Information
*
PART
TEMP. RANGE
PIN-PACKAGE
MAX8875EUKxy-T
-40°C to +85°C
5 SOT23-5
*
xy is the output voltage code (see Output Voltage Selector
Guide).
Applications
Output Voltage Selector Guide
PCS Telephones
Cellular Telephones
Cordless Telephones
PCMCIA Cards
Hand-Held Instruments
Palmtop Computers
Electronic Planners
Modems
PART
V
(V)
TOP MARK
ADQI
OUT
MAX8875EUK15-T
MAX8875EUK25-T
MAX8875EUK27-T
MAX8875EUK30-T
MAX8875EUK33-T
MAX8875EUK50-T
1.5
2.5
2.7
3.0
3.3
5.0
ADKZ
ADLA
ADLB
ADLC
ADLD
Note: Other output voltages between 1.5V and 5.0V are avail-
able in 100mV increments—contact the factory for information.
Minimum order quantity is 25,000 units.
Typical Operating Circuit
OUTPUT
PRESET
INPUT
+2.5V TO +6.5V
1.5V TO 5.0V
Pin Configuration
150mA
IN
OUT
POK
C
OUT
1µF
TOP VIEW
C
IN
1µF
1
2
3
5
OUT
IN
GND
MAX8875
100k
MAX8875
ON
TO µC
SHDN
OFF
GND
SHDN
4
POK
SOT23-5
________________________________________________________________ Maxim Integrated Products
1
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.