MAX8885 Datasheet, PDF (1/8 Pages) Maxim Integrated Products – 150mA, Low-Dropout Linear Regulator with Power-OK Output

19-1576; Rev 0; 10/99
150mA, Low-Dropout Linear Regulator
with Power-OK Output
General Description
The MAX8885 low-dropout (LDO) linear regulator operates
from a +2.5V to +6.5V input voltage range and delivers up
to 150mA. It uses a P-channel MOSFET pass transistor to
allow a low 85µA supply current—which is independent of
the load—as well as LDO voltage. The MAX8885 is opti-
mized to operate with low-cost, high-ESR output capaci-
tors such as small case-size tantalum capacitors. It is ideal
for cost-sensitive portable equipment such as PCS and
cellular phones. For a pin-compatible, functionally equiva-
lent device for use with a low-ESR, ceramic output capaci-
tor, refer to the MAX8875 data sheet.
The MAX8885 features a power-OK output that indicates
when the output is out of regulation, and is available in
preset output voltage versions of 5.0V, 3.3V, 3.0V, 2.7V,
and 2.5V. Other features include 1µA (max) shutdown cur-
rent, short-circuit protection, thermal shutdown protection,
and reverse-battery protection. The MAX8885 is available
in a miniature 5-pin SOT23 package.
PCS Phones
Cellular Phones
Cordless Phones
PCMCIA Cards
Applications
Modems
Hand-Held Instruments
Palmtop Computers
Electronic Planners
Output Voltage Selector Guide
PART
MAX8885EUK25
V_OUT (V)
2.5
TOP MARK
ADLE
MAX8885EUK27
2.7
ADLF
MAX8885EUK30
3.0
ADLG
MAX8885EUK33
3.3
ADLH
MAX8885EUK50
5.0
ADLJ
Note: Other output voltages between 2.5V and 5.0V are avail-
able in 100mV increments—contact factory for information.
Minimum order quantity is 25,000 units.
Pin Configuration
TOP VIEW
IN 1
5 OUT
MAX8885
GND 2
SHDN 3
4 POK
Features
o Optimized for Low-Cost Tantalum Capacitors
o Pin Compatible with MIC5206
o Undervoltage Power-OK Output
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
MAX8885EUK25 -40°C to +85°C
5 SOT23-5
MAX8885EUK27 -40°C to +85°C
5 SOT23-5
MAX8885EUK30 -40°C to +85°C
5 SOT23-5
MAX8885EUK33 -40°C to +85°C
5 SOT23-5
MAX8885EUK50 -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
MAX8885
SHDN
POK
GND
OUTPUT
PRESET
2.5V TO 5.0V
150mA
C_OUT
4.7µF
100k
TO
µC
SOT23-5
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