LP3987 Datasheet, PDF (1/8 Pages) National Semiconductor (TI) – Micropower micro SMD 150 mA Ultra Low-Dropout CMOS Voltage Regulators with sleep MODE

LP3987
300mA,Ultra-LowNoise
Ultra-fast CMOS LDO Regrlator
General Description
The LP3987 is designed for portable RF and
wireless applications with demanding performance
and space requirements. The LP3987 performance
is optimized for battery-powered systems to deliver
ultra low noise and low quiescent current. A noise
bypass pin is available for further reduction of
output noise. Regulator ground current increases
only slightly in dropout, further prolonging the
battery life. The LP3987 also works with low-ESR
ceramic capacitors, reducing the amount of board
space necessary for power applications, critical in
hand-held wireless devices. The LP3987 consumes
less than 0.01µA in shutdown mode and has fast
turn-on time less than 50µs. The other features
include ultra low dropout voltage, high output
accuracy, current limiting protection, and high
ripple rejection ratio. Available in the 5-lead of
SOT-23 packages.
Pin Configurations
Features
Ultra-Low-Noise for RF Application
2.5V- 6V Input Voltage Range
Low Dropout : 220mV @ 300mA
High PSSR:-80dB at 1KHz
< 0.01 A Standby Current When
Shutdown
TTL-Logic-Controlled Shutdown Input
Custom Voltage Available
Ultra-Fast Response in Line/Load
Transient
Quick Start-Up (Typically 50 s)
Current Limiting and Thermal Shutdown
Protection
Applications
PMP/PDA/MP3 players
Cellular and Mobile phone
RF Module
Sensor Module
Ordering Information
SOT-23-5
SOT-23
Typical Application Circuit
LP3987 - □□ □ □□
F:PB-Free
Package Type
B5: SOT-23-5
B3: SOT-23
Output Voltage:
SOT23-5(B5) Type:
Type
ABCDEH F G
Voltage(V) 1.5 1.8 2.5 2.7 2.8 2.85 3.0 3.3
SOT23 (B3) Type:
Type
ABCDEH F G
Voltage(V) 1.5 1.8 2.0 2.1 2.5 2.8 3.0 3.3
Note:
1. Output Voltage range from 1.5V to 3.3V;
2. 2.85V output order is LP3987-HB5F.
LP3987-datasheet Oct.-2003
1-1