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Micropower 50 mA Ultra Low-Dropout Regulator In SOT-23 Package
ON/OFF
COUT
2.2 μF
ON/OFF
GND
OUT VOUTVIN
CIN
1 μF
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LP2980-NSNOS733P –APRIL 2000–REVISED SEPTEMBER
LP2980-N Micropower 50-mA Ultra-Low-Dropout Regulatorin SOT-23 Package Features 2.1-Vto 16-V Input Voltage Range 5-V, 4.7-V, 3.3-V, 3-V, and 2.5-V Output Versions Ultra-Low-Dropout Voltage Output Voltage Accuracy 0.5%(A Grade) Ensured 50-mA Output Current Requires Only 1-μF External Capacitance < 1-μA Quiescent Current When Shutdown Low Ground Pin CurrentatAll Load Currents High Peak Current Capability (150 mA Typical) Wide Supply Voltage Range (16V Maximum) Fast Dynamic Responseto Line and Load Low ZOUT Over Wide Frequency Range Overtemperature and Overcurrent Protection −40°Cto 125°C Junction Temperature Range
Applications Cellular Phone Palmtop/Laptop Computer Personal Digital Assistant (PDA) Camcorder, Personal Stereo, Camera
DescriptionThe LP2980-N isa 50-mA, fixed-output voltage
regulator designed specifically to meet the
requirementsof battery-powered applications.
Using an optimized VIP (Vertically Integrated PNP)
process, the LP2980-N delivers unequaled
performancein all specifications critical to battery-
powered designs:
Dropout voltage: Typically 120 mVat 50-mA load,
and7 mVat 1-mA load.
Ground pin current: Typically 375 μAat 50-mA load,
and80 μAat 1-mA load.
Sleep mode: Less than 1-μA quiescent current when
ON/OFF pinis pulledto less than 0.18V.
Minimum part count: Requires onlya 1-μF capacitor the regulator output.
Precision output: Initial output voltage toleranceof
±0.5%(A grade).
5-V, 4.7-V, 3.3-V, 3-V, and 2.5-V versions available standard products.
Device Information(1)
Simplified Schematic
