General Description
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 POK ouput flag. Both
regulators feature exceptionally low 100mV dropout at
200mA. These devices are available in a variety of pre-
set output voltages in the +1.5V to +3.3V range.
An internal PMOS pass transistor allows the low 55A
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 power-OK (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.
________________________Applications
Notebook Computers
Wireless Handsets
PDAs and Palmtop Computers
Digital Cameras
PCMCIA Cards
Hand-Held Instruments
Features
o Guaranteed 300mA Ouput Current (500mA for
pulsed loads)
o Low 100mV Dropout at 200mA Load
o POK Output (MAX8888)
o 42VRMS Ouput Noise (MAX8887)
o Preset Output Voltages (1.5V, 1.8V, 2.85V, and
3.3V)
o 55A No-Load Supply Current
o Thermal-Overload and Short–Circuit Protection
o Foldback Ouput Current-Limit Protection
o 60dB PSRR at 1kHz
o 0.1A Shutdown Current
o Thin 5-Pin SOT23 Package, 1mm High
MAX8887/MAX8888
Low-Dropout, 300mA Linear Regulators in SOT23
________________________________________________________________ Maxim Integrated Products
1
GND
BP
SHDN
15
OUT
IN
MAX8887
TOP VIEW
2
34
GND
POK
SHDN
15
OUT
IN
MAX8888
2
34
Pin Configurations
MAX8887
MAX8888
ON
OFF
INPUT
+2.5V TO +5.5V
IN
SHDN
GND
(BP)
POK
OUT
VOUT
300mA
CIN
2.2
F
COUT
2.2
F
CBP
0.01
F
( ) ARE FOR MAX8887 ONLY.
Typical Operating Circuit
19-1859; Rev 0; 12/00
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.
Ordering Information
PART
TEMP
RANGE
PIN-
PACKAGE
TOP
MARK
MAX8887EZK15
-40
°C to +85°C
5-SOT23
ADQD
MAX8887EZK18
-40
°C to +85°C
5-SOT23
ADPX
MAX8887EZK29
-40
°C to +85°C
5-SOT23
ADPY
MAX8887EZK33
-40
°C to +85°C
5-SOT23
ADPZ
MAX8887EZKxy*
-40
°C to +85°C
5-SOT23
–
MAX8888EZK15
-40
°C to +85°C
5-SOT23
ADQE
MAX8888EZK18
-40
°C to +85°C
5-SOT23
ADQA
MAX8888EZK29
-40
°C to +85°C
5-SOT23
ADQB
MAX8888EZK33
-40
°C to +85°C
5-SOT23
ADQC
MAX8888EZKxy*
-40
°C to +85°C
5-SOT23
–
*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.