LP5900 Datasheet, PDF (1/10 Pages) National Semiconductor (TI) – Ultra Low Noise, 100 mA Linear Regulator for RF/Analog Circuits Requires No Bypass Capacitor

July 2005
LP5900
Ultra Low Noise, 100 mA Linear Regulator for RF/Analog
Circuits Requires No Bypass Capacitor
General Description
The LP5900 is a linear regulator capable of supplying 100
mA output current. Designed to meet the requirements of
RF/Analog circuits, the LP5900 device provides low noise,
high PSRR, low quiescent current, and low line transient
response figures. Using new innovative design techniques
the LP5900 offers class-leading device noise performance
without a noise bypass capacitor.
The device is designed to work with 0.47 µF input and output
ceramic capacitors. (No Bypass Capacitor is required)
This device is available with 1.5V, 1.8V, 2.0V, 2.2V, 2.5V,
2.8V, 3.0V, and 3.3V outputs. Please contact your local sales
office for any other voltage options.
Features
n Stable with 0.47 µF Ceramic Input and Output
Capacitors
n No Noise Bypass Capacitor Required
n Logic Controlled Enable
n Thermal-overload and short-circuit protection
n −40˚C to +125˚C junction temperature range for
operation
Key Specifications
n Input voltage range
n Output voltage range
n Output current
n Low output voltage noise
n PSRR
n Output voltage tolerance
n Virtually zero I_Q (disabled)
n Very low I_Q (enabled)
n Start-up time
n Low dropout
2.5V to 5.5V
1.5V to 3.3V
100 mA
6.5 µV_RMS
85 dB at 1 kHz
± 2%
<1 µA
25 µA
150 µs
80 mV typ.
Package
4-Bump micro SMD
(lead free)
1.057 mm x 1.083 mm
Applications
n Cellular phones
n PDA handsets
n Wireless LAN devices
Typical Application Circuit
© 2005 National Semiconductor Corporation DS201441
20144101
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