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Description:
MAX8887EZKXYT Low-Dropout, 300mA Linear Regulators in SOT23
Prototype PCB
Part No.:   MAX8887EZKXYT
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Description:   Low-Dropout, 300mA Linear Regulators in SOT23
File Size :   254 K    
Page : 9 Pages
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Low-Dropout, 300mA Linear Regulators in SOT23
Typical Operating Characteristics (continued)
(Typical
Operating Circuit,
T
A
= +25°C, unless otherwise noted.)
LOAD-TRANSIENT RESPONSE
NEAR DROPOUT
MAX8887/8 toc12
MAX8887/MAX8888
LINE-TRANSIENT RESPONSE
MAX8887/8 toc13
300mA
4.5V
I
OUT
10mA
V
IN
V
OUT
50mV/div
AC-COUPLED
V
OUT
20mV/div
AC-COUPLED
V
OUT
= 3.3V
I
LOAD
= 100mA
100μs/div
4V
V
OUT
= 3.3V
V
IN
= 3.4V
10μs/div
SHUTDOWN WAVEFORM
MAX8887/8 toc14
POK WAVEFORM
MAX8887/8 toc15
V
SHDN
2V/div
V
IN
V
OUT
= 3.3V, R
LOAD
= 100Ω
2V/div
V
OUT
1V/div
DC-COUPLED
V
OUT
2V/div
V
POK
2V/div
V
OUT
= 3.3V, R
LOAD
= 10Ω
20μs/div
20ms/div
Pin Description
MAX8887
1
2
3
MAX8888
1
2
3
NAME
IN
GND
SHDN
FUNCTION
Regulator Input. Supply voltage can range from 2.5V to 5.5V. Bypass with 2.2µF
capacitor to GND (see the
Capacitor Selection and Regulator Stability
section).
Ground
Active-Low Shutdown Input. A logic low reduces the supply current to below 0.1µA.
In shutdown, POK and OUT are driven low. Connect to IN for normal operation.
Open-Drain Active-Low POK Output. POK remains low while the output voltage (V
OUT
) is
below the reset threshold. Connect a 100kΩ pullup resistor to OUT to obtain a logic level
output. POK is driven low in shutdown. If not used, leave this pin unconnected.
Reference Bypass. Bypass with a low-leakage 0.01µF ceramic capacitor.
Regulator Output. Sources up to 300mA guaranteed. Bypass with 2.2µF (<0.2Ω typical
ESR) ceramic capacitor to GND.
4
5
4
5
POK
BP
OUT
_______________________________________________________________________________________
5
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