LP5952TL-0.7                                Description

The LP5952 is a dual-supply-rail linear regulator optimized for powering ultralow-voltage circuits from a single Li-lon cell or 3-cell NiMH/NiCd battery. In the typical post-regulation application VBATTis directly connected to the battery(range2.5 V to 5.5V, and Vn is supplied by the output voltage of the DC-DC converter(range 0.7 V to4.5V).

LP5952TL-0.7                               Features

Input Voltage Range:0.7Vto4.5V

2.5V≤VBATT≤5.5V

0.5V≤VouT≤ 2V

Ensured 350-mAOutput Current For ILOAD=350 mA:

-VeAT≥ VoUTNM+ 1.5V or 2.5 V

(Whichever is Higher) For lLOAD=150 mA:

-VBAT≥VOUTNOM+1.3Vor 2.5V

(Whichever is Higher)

Excellent Load Transient Response:+15mV Typical

Excellent Line Transient Response:+1mV Typica50-uA Typical Quiescent Current from VBAL10-uA Typical Quiescent Current from Vin

0.1-uA Typical Quiescent Current in Shutdown Noise voltage=100 uVMs Typical

Operates from a Single Li-lon Cell or 3-Cell NiMH/NiCd Battery

Thermal-Overload and Short-Circuit Protection

LP5952TL-0.7                               Applications

Mobile Phones

Hand-Held Radios

Personal Diqital Assistants Palm-Top PCs

PortableInstruments

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