Preliminary Datasheet

LP3981

LP3981 – 01 Ver. 1.1 Datasheet

Feb.-2008

Page 2 of 8

Functional Pin Description

Pin Name

Pin Function

EN

Chip Enable (Active High). Note that this pin is high impedance. There should be a pull low

100kΩ resistor connected to GND when the control signal is floating.

NC

NC

GND

Ground

VOUT

Output Voltage

VIN

Power Input Voltage

Function Block Diagram

Absolute Maximum Ratings

Supply Input Voltage-------------------------------------------------------------------------------------------------------------6V

Power Dissipation, PD @ TA = 25°C

SOT-25 --------------------------------------------------------------------------------------------------------400mW

Package Thermal Resistance

SOT-25

, θJA ---------------------------------------------------------------------------------------------------------------250°C/W

Lead Temperature (Soldering, 10 sec.) --------------------------------------------------------------------------------260°C

Storage Temperature Range -------------------------------------------------------------------------------- −65°C to 150°C

ESD Susceptibility

HBM (Human Body Mode) ---------------------------------------------------------------------------------------------------2kV

MM(Machine-Mode)-----------------------------------------------------------------------------------------------------------200V

Recommended Operating Conditions

Supply Input Voltage------------------------------------------------------------------------------------------------2.5V to 5.5V

EN Input Voltage ------------------------------------------------------------------------------------------------------0V to 5.5V

Operation Junction Temperature Range -----------------------------------------------------------------−40°C to 125°C

Operation Ambient TemperatureRange--------------------------------------------------------------------−40°C to 85°C