LP5900 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 碌F 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.
Key Specifications
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Input voltage range
Output voltage range
Output current
Low output voltage noise
PSRR
Output voltage tolerance
Virtually zero I
Q
(disabled)
Very low I
Q
(enabled)
Start-up time
Low dropout
2.5V to 5.5V
1.5V to 3.3V
100 mA
6.5 碌V
RMS
85 dB at 1 kHz
鹵
2%
<
1 碌A(chǔ)
25 碌A(chǔ)
150 碌s
80 mV typ.
Features
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Stable with 0.47 碌F Ceramic Input and Output
Capacitors
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No Noise Bypass Capacitor Required
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Logic Controlled Enable
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Thermal-overload and short-circuit protection
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鈭?0藲C to +125藲C junction temperature range for
operation
Package
4-Bump micro SMD
(lead free)
1.057 mm x 1.083 mm
Applications
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Cellular phones
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PDA handsets
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Wireless LAN devices
Typical Application Circuit
20144101
漏 2005 National Semiconductor Corporation
DS201441
www.national.com