MAX8888 MAXIM [Maxim Integrated Products], MAX8888 Datasheet - Page 5

• Manufacturer Part Number: MAX8888
• Description: Low-Dropout, 300mA Linear Regulators in SOT23
• Manufacturer: MAXIM [Maxim Integrated Products]

(Typical Operating Circuit, T
Low-Dropout, 300mA Linear Regulators in SOT23
MAX8887
—
1
2
3
4
5
V
V
SHDN
V
MAX8888
I
OUT
OUT
OUT
_______________________________________________________________________________________
—
1
2
3
4
5
V
OUT
LOAD-TRANSIENT RESPONSE
= 3.3V, R
A
SHUTDOWN WAVEFORM
= +25°C, unless otherwise noted.)
NEAR DROPOUT
NAME
SHDN
LOAD
GND
POK
OUT
BP
IN
10μs/div
20μs/div
= 10Ω
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
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.
V
OUT
V
MAX8887/8 toc12
MAX8887/8 toc14
IN
Typical Operating Characteristics (continued)
= 3.3V
= 3.4V
300mA
10mA
50mV/div
AC-COUPLED
2V/div
1V/div
DC-COUPLED
V
V
V
OUT
V
OUT
POK
V
IN
IN
LINE-TRANSIENT RESPONSE
FUNCTION
POK WAVEFORM
V
100μs/div
20ms/div
OUT
= 3.3V, R
I
LOAD
LOAD
V
OUT
MAX8887/8 toc13
= 100mA
MAX8887/8 toc15
= 100Ω
= 3.3V
Pin Description
4.5V
4V
20mV/div
AC-COUPLED
2V/div
2V/div
2V/div
OUT
) is
5