LP3852 datasheet(6/32 Pages) TI

6 / 32 page

LP3852, LP3855

SNVS174I – FEBRUARY 2003 – REVISED FEBRUARY 2015

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8.5 Electrical Characteristics

Unless otherwise specified: VIN = VOUT(NOM) + 1 V, IOUT = 10 mA, COUT = 10 µF, VSD = 2 V, TJ = 25°C.

PARAMETER

TEST CONDITIONS

MIN(1)

TYP(2)

MAX(1)

UNIT

VOUT +1 V ≤ VIN ≤ 7 V

–1.5%

1.5%

10 mA

≤ IOUT ≤ 1.5 A

VOUT

Output voltage tolerance(3)

For –40°C

≤ TJ ≤ 125°C

–3%

VOUT +1 V ≤ VIN ≤ 7 V

0.02%

ΔVOUT/ΔVIN

Output voltage line regulation(3)

For –40°C

≤ TJ ≤ 125°C

0.06%

10 mA

≤ IOUT ≤ 1.5 A

0.06%

ΔVOUT/ΔIOUT

Output voltage load regulation(3)

For –40°C

≤ TJ ≤ 125°C

0.12%

IOUT = 150 mA

For –40°C

≤ TJ ≤ 125°C

Dropout voltage

TO-263 and TO-220(4)

IOUT = 1.5A

240

280

For –40°C

≤ TJ ≤ 125°C

380

VIN - VOUT

IOUT = 150mA

For –40°C

≤ TJ ≤ 125°C

Dropout voltage

SOT(4), (5)

IOUT = 1.5 A

260

320

For –40°C

≤ TJ ≤ 125°C

435

IOUT = 150 mA

For –40°C

≤ TJ ≤ 125°C

Ground pin current in normal

IGND

operation mode

IOUT = 1.5 A

For –40°C

≤ TJ ≤ 125°C

VSD ≤ 0.3V

0.01

Ground pin current in shutdown

IGND

µA

mode

-40°C

≤ TJ ≤ 85°C

IOUT(PK)

Peak output current

VO ≥ VO(NOM) – 4%

1.8

SHORT CIRCUIT PROTECTION

ISC

Short circuit current

3.2

SHUTDOWN INPUT

VSDT Rising from 0.3 V until

1.3

Output = ON

For –40°C

≤ TJ ≤ 125°C

VSDT

Shutdown threshold

VSDT Falling from 2 V until

1.3

Output = OFF

For –40°C

≤ TJ ≤ 125°C

0.3

TdOFF

Turnoff delay

IOUT = 1.5 A

µs

TdON

Turnon delay

IOUT = 1.5 A

µs

ISD

SD input current

VSD = VIN

ERROR PIN

See(6)

10%

Threshold

For –40°C

≤ TJ ≤ 125°C

16%

See(6)

VTH

Threshold hysteresis

For –40°C

≤ TJ ≤ 125°C

(1)

Limits are specified by testing, design, or statistical correlation.

(2)

Typical numbers are at 25°C and represent the most likely parametric norm.

(3)

Output voltage line regulation is defined as the change in output voltage from the nominal value due to change in the input line voltage.

Output voltage load regulation is defined as the change in output voltage from the nominal value due to change in load current. The line

and load regulation specification contains only the typical number. However, the limits for line and load regulation are included in the

output voltage tolerance specification.

(4)

Dropout voltage is defined as the minimum input to output differential voltage at which the output drops 2% below the nominal value.

Dropout voltage specification applies only to output voltages of 2.5V and above. For output voltages below 2.5 V, the drop-out voltage is

nothing but the input to output differential, since the minimum input voltage is 2.5 V.

(5)

The SOT-223 package devices have slightly higher dropout due to increased bond wire resistance.

(6)

ERROR threshold and hysteresis are specified as percentage of regulated output voltage. See ERROR Flag Operation.

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