LP3218 datasheet(4/8 Pages) POWER

4 / 8 page

LP3218-04

Jun.-2015

Email: marketing@lowpowersemi.com

www.lowpowersemi.com

Page 4 of 8

Preliminary Datasheet

LP3218

Electrical Characteristics

(VIN =VEN, Typical values are TA=25℃ )

Symbol

Parameter

Condition

Min

Typ

Max

Units

VIN

Input Voltage

2.5

5.5

ΔVLINE_REG/ΔVIN

Line Regulation

VIN=2.5V to 5.5V,

IOUT=10mA

0.15

%/v

ΔVLOAD_REG/ΔIOUT

Load Regulation

IOUT=10mA to 2000mA

0.25

%/A

VOUT

Output Voltage Range

0.6

VIN

Quiescent Current

VFB=0.7V,VIN=4.2V

µA

ISHDN

Shutdown Current

EN=GND

µA

ILIM

P-Channel Current Limit

3.5

RDS(ON)_H

High-Side Switch On Resistance

mΩ

RDS(ON)_L

Low-Side Switch On Resistance

mΩ

ISW_LEAK

SW Leakage Current

VEN=0V,

VSW=0 or 5V, VIN=5V

µA

VFBa

Feedback Threshold Voltage

Accuracy

VIN=2.5 to 5.5V,

IOUT=10 to 2000mA

0.585

0.6

0.615

IFB

FB Leakage Current

VFB=1 .0V

fOSC

Oscillator Frequency

VFB=0.6V

1.5

MHz

Startup Time

From Enable to Output

Regulation

120

µs

TSD

Over-Temperature Shutdown

Threshold

150

℃

VEN(L)

Enable Threshold Low

0.4

VEN(H)b

Enable Threshold High

1.4

IEN

Input Low Current

VIN=VEN=5.0V

µA

Note:

a. Output Voltage: VOUT=0.6×(1+R1/R2) Volts;

b. There must pay attention that the voltage applied to EN should be less than VIN+0.3V and the voltage apply to EN should be late

to VIN, otherwise the output voltage may be equal to VIN.

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