LP3983H Datasheet, PDF (1/10 Pages) Lowpower Semiconductor inc – Ultra-Low-Noise for RF Application

Preliminary Datasheet
LP3983H
600mA,Ultra-low noise, Small Package
Ultra-Fast CMOS LDO Regulator
General Description
The LP3983H is designed for portable RF and wireless
applications with demanding performance and space
requirements. The LP3983H 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
LP3983H also works with low-ESR ceramic capacitors,
reducing the amount of board space necessary for
power applications, critical in hand-held wireless
devices. The LP3983H 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. It is available
in the 5-lead of SOT23-5 packages.
Ordering Information
LP3983H □
□□ □ □□
FB voltage
09: 0.9V
08: 0.8V
F: Pb-Free
Package Type
B5: SOT23-5
B6: SOT23-6
Output Voltage Type
A: Adjustable
Features
 Ultra-Low-Noise for RF Application
 2V- 6V Input Voltage Range
 Low Dropout : 300mV @ 400mA
 600mA Output Current, 750mA Peak Current
 High PSRR: -68dB at 1KHz
 < 0.01uA Standby Current When Shutdown
 Available in SOT23-5/6 Package
 TTL-Logic-Controlled Shutdown Input
 Ultra-Fast Response in Line/Load transient
 Current Limiting and Thermal Shutdown
Protection
 Quick start-up (typically 20uS)
Typical Application Circuit
Vin
2.2uF
1
LP3983HAB5F
5
VIN
OUT
22pF
Chip Enable
3
EN
GND
2
4
ADJ
Vout
2.2uF
R1
R2
Applications
 Portable Media Players/MP3 players
 Cellular and Smart mobile phone
 LCD
 DSC Sensor
 Wireless Card

LP3983H–00 Version 1.0 Aug.-2014 Email: [e-mail] www.lowpowersemi.com Page 1 of 10