19-1859; Rev 4; 7/09
Low-Dropout, 300mA Linear Regulators in SOT23
7/MAX8
General Description
Features
♦ Guaranteed 300mA Output Current (500mA for
The MAX8887/MAX8888 low-dropout linear regulators
operate from a 2.5V to 5.5V input and deliver up to
300mA continuous (500mA pulsed) current. The
MAX8887 is optimized for low-noise operation, while the
MAX8888 includes an open-drain power-OK (POK) ouput
flag. Both regulators feature exceptionally low 100mV
dropout at 200mA. These devices are available in a vari-
ety of preset output voltages in the 1.5V to 3.3V range.
Pulsed Loads)
♦ Low 100mV Dropout at 200mA Load
♦ POK Output (MAX8888)
♦ 42µV
Output Noise (MAX8887)
RMS
♦ Preset Output Voltages (1.5V, 1.8V, 2.85V, and
3.3V)
♦ 55µA No-Load Supply Current
An internal PMOS pass transistor allows the low 55µA
supply current to remain independent of load, making
these devices ideal for portable battery-powered equip-
ment such as personal digital assistants (PDAs), cellu-
lar phones, cordless phones, and notebook computers.
Other features include a micropower shutdown mode,
short-circuit protection, thermal shutdown protection,
and an active-low open-drain POK output that indicates
when the output is out of regulation. The
MAX8887/MAX8888 are available in a thin 5-pin SOT23
package that is only 1mm high.
♦ Thermal-Overload and Short-Circuit Protection
♦ Foldback Output Current-Limit Protection
♦ 60dB PSRR at 1kHz
♦ 0.1µA Shutdown Current
♦ Thin 5-Pin SOT23 Package, 1mm High
Ordering Information
TEMP
RANGE
PIN-
PACKAGE
TOP
MARK
PART
MAX8887EZK15+T
MAX8887EZK18+T
MAX8887EZK29+T
MAX8887EZK33+T
MAX8887EZKxy+T*
MAX8888EZK15+T
MAX8888EZK18+T
-40°C to +85°C 5 SOT23
-40°C to +85°C 5 SOT23
-40°C to +85°C 5 SOT23
-40°C to +85°C 5 SOT23
-40°C to +85°C 5 SOT23
-40°C to +85°C 5 SOT23
-40°C to +85°C 5 SOT23
ADQD
ADPX
ADPY
ADPZ
—
________________________Applications
Notebook Computers
Wireless Handsets
ADQE
ADQA
—
PDAs and Palmtop Computers
Digital Cameras
MAX8888EZK18/V+T -40°C to +85°C 5 SOT23
PCMCIA Cards
MAX8888EZK29+T
MAX8888EZK33+T
MAX8888EZKxy+T*
-40°C to +85°C 5 SOT23
-40°C to +85°C 5 SOT23
-40°C to +85°C 5 SOT23
ADQB
ADQC
—
Hand-Held Instruments
*Other versions (xy) between +1.5 and +3.3V are available in
100mV increments. Contact factory for other versions. Minimum
order quantity is 25,000 units.
+Denotes a lead(Pb)-free RoHS-compliant package.
/V denotes an automotive qualified port.
Typical Operating Circuit
Pin Configurations
V
OUT
INPUT
2.5V TO 5.5V
300mA
IN
OUT
TOP VIEW
C
C
OUT
IN
2.2µF
2.2µF
MAX8887
MAX8888
IN
GND
1
2
3
5
4
OUT
IN
GND
1
2
3
5
OUT
POK
(BP)
ON
MAX8887
MAX8888
SHDN
OFF
C
GND
BP
0.01µF
SHDN
BP
SHDN
4
POK
( ) ARE FOR MAX8887 ONLY.
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
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