LM2954L-AD-D08-R datasheet(6/7 Pages) UTC

6 / 7 page

LM2954

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

6 of 7

www.unisonic.com.tw

QW-R102-002.O



ELECTRICAL CHARACTERISTICS(Cont.)

LM2954-ADJ FOR 8-PIN VERSION ONLY

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Reference Voltage

VREF

1.22

1.235

1.25

Reference Voltage

VREF

VREFVOUT(VIN-1V),

2.3V

VIN18V,

100μA

IL100mA, TJTJMAX

1.19

1.27

Feedback Pin Bias Current

IB(FB)

Reference Voltage Temperature

Coefficient

TCVREF

ppm/°C

Feedback Bias Current Temperature

Coefficient

TCIO

0.1

nA/°C

ERROR COMPARATOR

Output Leakage Current

IO(LEAK)

VOH=28V

μA

Output Low Voltage

VOL

VIN=4.5V, IOL=400μA

250

Upper Threshold Voltage

VTHD(UP) (Note 3)

3.2

%VOUT

Lower Threshold Voltage

VTHD(LOW) (Note 3)

7.6

%VOUT

Hysteresis

VHYS

(Note 3)

SHUTDOWN INPUT

Low (Regulator ON)

1.3

0.70

Input Logic Voltage

VI(LOG)

High (Regulator OFF)

2.0

VSHDN=2.4V

μA

Shutdown Pin Input Current

II(SHDN)

VSHDN=28V

450

600

μA

Regulator Output Current Shutdown

IO(SHDN)

VSHDN≧2V,VIN≦28V, VOUT=0,

Feedback pin tied to 5V Tap.

μA

Note: 1. Additional conditions for 8-pin versions are feedback tied to 5V Tap an Output tied to Output Sense

(VOUT=5V) and VSHDN≦0.8V.

2. Dropout voltage is defined as the input to output differential at which the output voltage drops 100mV below

its nominal value measured at 1V differential.

3. Comparator thresholds are expressed in terms of percentage value of voltage output.

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