LP3321 datasheet(3/9 Pages) POWER

3 / 9 page

Preliminary Datasheet

LP3321

LP3321 – 01 Vesion 1.1 Datasheet

Feb.-2011

www.lowpowersemi.com

Page 3 of 9

Absolute Maximum Ratings

Supply Input Voltage---------------------------------------------------------------------------------------------------−0.3V to 6.0V

SW Input Voltage --------------------------------------------------------------------------------------------------------−0.3V to 43V

The Other Pins ----------------------------------------------------------------------------------------------------------−0.3V to 5.5V

Power Dissipation, PD @ TA = 25°C TSOT-23-5/6-----------------------------------------------------------------------0.455W

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

Operation Temperature Range ---------------------------------------------------------------------------------

−40°C to 80°C

Storage Temperature Range ----------------------------------------------------------------------------------------

−65°C to 150°C

Electrical Characteristics

Parameter

Symbol

Test Condition

Min

Typ.

Max

Units

System Supply Input

Operation voltage Range

VDD

2.7

Under Voltage Lock Out

VDD

2.2

2.4

2.6

Supply Current

IDD

FB=0.2V, Switch

430

550

Shut Down Current

IDD

VEN < 0.4V

0.1

Line Regulation

VIN : 3.0~4.3V

Oscillator

Operation Frequency

FOSC

1.0

1.3

1.5

MHz

Maximum Duty Cycle

Feedback Voltage

LP3321

185

195

205

LP3321A

285

300

315

MOSFET

On Resistance of MOSFET

RDS(ON)

0.5

SW Current Limit

ILM

1.4

Protection

OVP Threshold

VOVP

OVP Sink Current

Shut Down Voltage

VEN

0.4

Enable on Voltage

VEN

0.6

Minimum EN Dimming

Threshold

VFB=0 V

0.7

Minimum EN Dimming

Threshold

VFB=195mV

1.4

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