LP38856 datasheet(3/14 Pages) NSC

3 / 14 page

Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

Storage Temperature Range

−65˚C to +150˚C

Lead Temperature

Soldering, 5 seconds

260˚C

ESD Rating

Human Body Model (Note 2)

±2kV

Power Dissipation (Note 3)

Internally Limited

IN Supply Voltage (Survival)

−0.3V to +6.0V

BIAS Supply Voltage (Survival)

−0.3V to +6.0V

EN Voltage (Survival)

−0.3V to +6.0V

OUT Voltage (Survival)

−0.3V to +6.0V

OUT Current (Survival)

Internally Limited

Junction Temperature

−40˚C to +150˚C

Operating Ratings(Note 1)

IN Supply Voltage

OUT +VDO)toVBIAS

BIAS Supply Voltage

3.0V to 5.5V

EN Enable Input Voltage

0.0V to V

BIAS

OUT

0 mA to 3.0A

Junction Temperature

Range(Note 3)

−40˚C to +125˚C

Electrical Characteristics Unless otherwise specified: V

IN =VOUT(NOM) + 1V, VBIAS = 3.0V, IOUT =10mA,

IN =COUT = 10 µF, CBIAS = 1µF, VEN =VBIAS. Limits in standard type are for TJ = 25˚C only; limits in boldface type apply

over the junction temperature (T

J) range of -40˚C to +125˚C. Minimum and Maximum limits are guaranteed through test, de-

sign, or statistical correlation. Typical values represent the most likely parametric norm at T

J = 25˚C, and are provided for ref-

erence purposes only.

Symbol

Parameter

Conditions

MIN

TYP

MAX

Units

OUT

Output Voltage Tolerance

OUT(NOM) +1V

≤ V

BIAS,

3.0V

≤ V

BIAS

≤ 5.5V,

10 mA

≤ I

OUT

≤ 3.0A

-1.0

-3.0

0.0

+1.0

+3.0

OUT(NOM) +1V

≤ V

BIAS,

3.0V

≤ V

BIAS

≤ 5.5V,

10 mA

≤ I

OUT

≤ 3.0A,

0˚C

≤ T

≤ 125˚C

-2.0

+2.0

∆V

OUT/

∆V

Line Regulation, V

(Note 4)

OUT(NOM) +1V

≤ V

BIAS

0.04

%/V

∆V

OUT/

∆V

BIAS

Line Regulation, V

BIAS

(Note 4)

3.0V

≤ V

BIAS

≤ 5.5V

0.10

%/V

∆V

OUT/

∆I

OUT

Output Voltage Load Regulation

(Note 5)

10 mA

≤ I

OUT

≤ 3.0A

0.2

%/A

Dropout Voltage

IN −VOUT

(Note 6)

OUT = 3.0A

240

300

450

GND(IN)

Ground Pin Current Drawn from

IN Supply

LP38856-0.8

10 mA

≤ I

OUT

≤ 3.0A

7.0

8.5

9.0

LP38856-1.2

10 mA

≤ I

OUT

≤ 3.0A

-11

≤ 0.5V

1.0

300

µA

GND(BIAS)

Ground Pin Current Drawn from

BIAS Supply

10 mA

≤ I

OUT

≤ 3.0A

3.0

3.8

4.5

≤ 0.5V

100

170

200

µA

UVLO

Under-Voltage Lock-Out

Threshold

BIAS rising until device is

functional

2.20

2.00

2.45

2.70

2.90

UVLO

(HYS)

Under-Voltage Lock-Out

Hysteresis

BIAS falling from UVLO

threshold until device is

non-functional

150

300

350

Output Short-Circuit Current

IN =VOUT(NOM) + 1V,

BIAS = 3.0V, VOUT = 0.0V

6.2

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