LP3987H Datasheet, PDF (1/9 Pages) Lowpower Semiconductor inc – Ultra-Low-Noise for RF Application

Preliminary Datasheet
LP3987H
600mA,Ultra-low noise, Ultra-Fast CMOS LDO Regulator
General Description
The LP3987H is designed for portable RF and wireless
applications with demanding performance and space
requirements. The LP3987H performance is optimized
for battery-powered systems to deliver ultra low noise
and low quiescent current. Regulator ground current
increases only slightly in dropout, further prolonging
the battery life. The LP3987H also works with low-ESR
ceramic capacitors, reducing the amount of board
space necessary for power applications, critical in
hand-held wireless devices. The LP3987H consumes
less than 0.01µA in shutdown mode and has fast
turn-on time less than 20µs. 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
LP3987H □ □ □ □ □
F: Pb-Free
Package Type
B5: SOT23-5
Output Voltage Type
12: 1.2V
15: 1.5V
18: 1.8V
25: 2.5V
28: 2.8V
30: 3.0V
33: 3.3V
Features
 Ultra-Low-Noise for RF Application
 2.5V- 6.5V Input Voltage Range
 Low Dropout : 400mV @ 500mA
 High PSSR:-80dB at 1KHz
 < 0.01uA Standby Current When Shutdown
 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
Cin
VIN
GND
VOUT
VOUT
Cout
ON
OFF
NC
EN
Applications
 Portable Media Players/MP3 players
 Cellular and Smart mobile phone
 Sensor Module
 RF Module
Pin Configurations
VIN
1
5
VOUT
GND
2 Top View
EN
3
4
NC
SOT-23-5
Marking Information
Device
LP3987H
Marking
Package
SOT23-5
Shipping
3K/REEL
LP3987H – 02 Version 1.2 May.-2013 Email: [e-mail]
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