LP3351 datasheet(5/7 Pages) POWER

5 / 7 page

Preliminary Datasheet

LP3351

Email: marketing@lowpowersemi.com www.lowpowersemi.com

Page 5 of 7

LP3351 Version 0.3 MAR-2018

Electrical Characteristics

(VIN=12V, VCTRL=5V, TA=25°C, unless otherwise specified)

Parameter

Symbol

Test Conditions

Min

Typ

Max

Units

General

Input Supply Voltage

VVLI

VIN Supply Current

Sleep Current

310

400

Operation Current

2.5

Input UVLO Threshold

VUVLO(VTH)

VIN Rising

UVLO Threshold Hysteresis

VUVLO(HYS)

Falling Hysteresis

500

Thermal Shutdown Threshold

TSD

Temperature Rising

140

160

180

°C

Thermal Shutdown Hysteresis

∆TSD

°C

PWM

Internal Oscillator Frequency

FOSC

175

200

225

kHz

PWM Threshold Voltage

VIH

Logic High.

2.6

VIL

Logic Low

Pull Down Resistor

RPull_Low

150

Ω

Error Amplifier

Reference Voltage

VREF

Reference voltage at

non-inverting input.

-1.5%

0.21

+1.5%

Open Loop Voltage Gain

Transconductance of EA

100

120

uA/V

Output Source Current

ISource

Output Sink Current

ISink

Protection Threshold

Over Voltage Protection

VOVP

Threshold of OVP

1.8

2.2

Over Current Protection

VOCP

Threshold of OCP

(duty=90%)

330

Fault Trigger Duration

Connect detect time

Tdet

SCP Threshold

VOVP_UV

Normal Operation

0.2

System Startup

100

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