19-1859; Rev 2; 6/04
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 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 55碌A
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.
Features
鈾?/div>
Guaranteed 300mA Output Current (500mA for
Pulsed Loads)
鈾?/div>
Low 100mV Dropout at 200mA Load
鈾?/div>
POK Output (MAX8888)
鈾?/div>
42碌V
RMS
Output Noise (MAX8887)
鈾?/div>
Preset Output Voltages (1.5V, 1.8V, 2.85V, and
3.3V)
鈾?/div>
55碌A No-Load Supply Current
鈾?/div>
Thermal Overload and Short-Circuit Protection
鈾?/div>
Foldback Output Current-Limit Protection
鈾?/div>
60dB PSRR at 1kHz
鈾?/div>
0.1碌A Shutdown Current
鈾?/div>
Thin 5-Pin SOT23 Package, 1mm High
MAX8887/MAX8888
Ordering Information
PART
TEMP
RANGE
-40掳C to +85掳C
-40掳C to +85掳C
-40掳C to +85掳C
-40掳C to +85掳C
-40掳C to +85掳C
-40掳C to +85掳C
-40掳C to +85掳C
-40掳C to +85掳C
PIN-
PACKAGE
5 SOT23-5
5 SOT23-5
5 SOT23-5
5 SOT23-5
5 SOT23-5
5 SOT23-5
5 SOT23-5
5 SOT23-5
5 SOT23-5
5 SOT23-5
TOP
MARK
ADQD
ADPX
ADPY
ADPZ
鈥?/div>
ADQE
ADQA
ADQB
ADQC
鈥?/div>
________________________Applications
Notebook Computers
Wireless Handsets
PDAs and Palmtop Computers
Digital Cameras
PCMCIA Cards
Hand-Held Instruments
MAX8887
EZK15-T
MAX8887EZK18-T
MAX8887EZK29-T
MAX8887EZK33-T
MAX8888
EZK15-T
MAX8888EZK18-T
MAX8888EZK29-T
MAX8888EZK33-T
MAX8887EZKxy-T* -40掳C to +85掳C
MAX8888EZKxy-T* -40掳C to +85掳C
Typical Operating Circuit
INPUT
2.5V TO 5.5V
IN
C
IN
2.2碌F
OUT
V
OUT
300mA
C
OUT
2.2碌F
POK
ON
SHDN
OFF
GND
(BP)
C
BP
0.01碌F
*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.
Pin Configurations
TOP VIEW
IN
1
5
OUT
IN
1
5
OUT
MAX8887
MAX8888
GND
2
MAX8887
GND
2
MAX8888
SHDN
3
( ) ARE FOR MAX8887 ONLY.
4
BP
SHDN
3
4
POK
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.
MAX8887 PDF文件相关型号
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