19-1556; Rev 0; 10/99
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.
ꢀ Power-OK Output
ꢀ Small Output Capacitor (1µF ceramic)
ꢀ Preset Output Voltages ( 1ꢀ accuracꢁ)
ꢀ Guaranteed 150mA Output Current
ꢀ 85µA No-Load Supplꢁ Current
ꢀ Low 110mV Dropout at 100mA Load (165mV at
150mA load)
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.
ꢀ Thermal-Overload and Short-Circuit Protection
ꢀ Reverse-Batterꢁ Protection
ꢀ 60dB PSRR at 100Hz
ꢀ 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.
Applications
Ordering Information
PCS Telephones
Cellular Telephones
Cordless Telephones
PCMCIA Cards
Hand-Held Instruments
Palmtop Computers
Electronic Planners
Modems
PART
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
5 SOT23-5
5 SOT23-5
5 SOT23-5
5 SOT23-5
5 SOT23-5
MAX8875EUK25-T
MAX8875EUK27-T
MAX8875EUK30-T
MAX8875EUK33-T
MAX8875EUK50-T
Output Voltage Selector Guide
Note: See Output Voltage Selector Guide for more information.
PART
V
OUT
(V)
TOP MARK
ADKZ
MAX8875EUK25
MAX8875EUK27
MAX8875EUK30
MAX8875EUK33
MAX8875EUK50
2.5
2.7
3.0
3.3
5.0
ADLA
ADLB
ADLC
ADLD
Typical Operating Circuit
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.
OUTPUT
PRESET
Pin Configuration
INPUT
2.5V TO 5.0V
150mA
+2.5V TO +6.5V
TOP VIEW
IN
OUT
POK
C
OUT
1µF
C
IN
1µF
1
2
3
5
4
OUT
POK
IN
GND
MAX8875
MAX8875
100k
ON
TO µC
SHDN
OFF
SHDN
GND
SOT23-5
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.