MAX8887_09 Datasheet, PDF (1/9 Pages) Maxim Integrated Products – Low-Dropout, 300mA Linear Regulators in SOT23

19-1859; Rev 4; 7/09
Low-Dropout, 300mA Linear Regulators in SOT23
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 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.
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.
________________________Applications
Notebook Computers
Wireless Handsets
PDAs and Palmtop Computers
Digital Cameras
PCMCIA Cards
Hand-Held Instruments
Typical Operating Circuit
INPUT
2.5V TO 5.5V
C_IN
2.2µF
ON
OFF
IN
OUT
MAX8887
MAX8888
POK
SHDN
(BP)
GND
V_OUT
300mA
C_OUT
2.2µF
C_BP
0.01µF
( ) ARE FOR MAX8887 ONLY.
Features
♦ Guaranteed 300mA Output Current (500mA for
Pulsed Loads)
♦ Low 100mV Dropout at 200mA Load
♦ POK Output (MAX8888)
♦ 42µV_RMS Output Noise (MAX8887)
♦ Preset Output Voltages (1.5V, 1.8V, 2.85V, and
3.3V)
♦ 55µA No-Load Supply Current
♦ 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
PART
TEMP
RANGE
PIN-
TOP
PACKAGE MARK
MAX8887EZK15+T -40°C to +85°C 5 SOT23 ADQD
MAX8887EZK18+T -40°C to +85°C 5 SOT23 ADPX
MAX8887EZK29+T -40°C to +85°C 5 SOT23 ADPY
MAX8887EZK33+T -40°C to +85°C 5 SOT23 ADPZ
MAX8887EZKxy+T* -40°C to +85°C 5 SOT23
—
MAX8888EZK15+T -40°C to +85°C 5 SOT23 ADQE
MAX8888EZK18+T -40°C to +85°C 5 SOT23 ADQA
MAX8888EZK18/V+T -40°C to +85°C 5 SOT23
—
MAX8888EZK29+T -40°C to +85°C 5 SOT23 ADQB
MAX8888EZK33+T -40°C to +85°C 5 SOT23 ADQC
MAX8888EZKxy+T* -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.
+Denotes a lead(Pb)-free RoHS-compliant package.
/V denotes an automotive qualified port.
Pin Configurations
TOP VIEW
IN 1
5 OUT IN 1
5 OUT
MAX8887
GND 2
MAX8888
GND 2
SHDN 3
4 BP SHDN 3
4 POK
________________________________________________________________ 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.