LP3990 Datasheet, PDF (1/13 Pages) National Semiconductor (TI) – 150mA Linear Voltage Regulator for Digital Applications

November 2004
LP3990
150mA Linear Voltage Regulator for Digital Applications
General Description
The LP3990 regulator is designed to meet the requirements
of portable, battery-powered systems providing an accurate
output voltage, low noise, and low quiescent current. The
LP3990 will provide a 0.8V output from the low input voltage
of 2V at up to 150mA load current. When switched into
shutdown mode via a logic signal at the enable pin, the
power consumption is reduced to virtually zero.
The LP3990 is designed to be stable with space saving
ceramic capacitors as small as 0.47µF.
Performance is specified for a -40˚C to 125˚C junction tem-
perature range.
For output voltages other than 0.8V, 1.35V, 1.5V, 1.8V, 2.5V,
2.8V, or 3.3V please contact your local NSC sales office.
Features
n 1% Voltage Accuracy at Room Temperature
n Stable with Ceramic Capacitor
n Logic Controlled Enable
n No Noise Bypass Capacitor Required
n Thermal-Overload and Short-Circuit Protection
Key Specifications
n Input Voltage Range
n Output Voltage Range
n Output Current
n Output Stable - Capacitors
n Virtually Zero I_Q (Disabled)
n Very Low I_Q (Enabled)
n Low Output Noise
n PSRR
n Fast Start Up
2.0 to 6.0V
0.8 to 3.3V
150mA
0.47uF
<10nA
43uA
150uV_RMS
55dB at 1kHz
105us
Package
All available in Lead Free option.
4 Pin micro SMD
1 mm x 1.28mm
6 pin LLP (SOT23 footprint)
SOT23 - 5
For other package options contact your NSC sales office.
Applications
n Cellular Handsets
n Hand-Held Information Appliances
Typical Application Circuit
© 2004 National Semiconductor Corporation DS200768
20076801
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