LP3853, LP3856

SNVS173G – FEBRUARY 2003 – REVISED APRIL 2013

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Electrical Characteristics

LP3853/LP3856

Limits in standard typeface are for TJ = 25°C, and limits in boldface type apply over the full operating temperature range.

Unless otherwise specified: VIN = VO(NOM) + 1V, IL = 10 mA, COUT = 10µF, VSD = 2V.

LP3853/6 (2)

Symbol

Parameter

Conditions

Typ (1)

Units

Min

Max

Output Voltage Tolerance

VOUT +1V ≤ VIN ≤ 7.0V

-1.5

+1.5

VO

0

%

(3)

10 mA

≤ IL ≤ 3A

-3.0

+3.0

Output Voltage Line Regulation

0.02

ΔV OL

VOUT +1V ≤ VIN ≤ 7.0V

%

(3)

0.06

Output Voltage Load Regulation

0.08

ΔVO/ ΔIOUT

10 mA

≤ IL ≤ 3A

%

(3)

0.14

50

IL = 300 mA

39

65

Dropout Voltage

VIN - VOUT

mV

(4)

450

IL = 3A

390

600

9

IL = 300 mA

4

10

Ground Pin Current In Normal

IGND

mA

Operation Mode

9

IL = 3A

4

10

VSD ≤ 0.3V

0.01

10

Ground Pin Current In Shutdown

IGND

µA

Mode

-40°C

≤ TJ ≤ 85°C

50

IO(PK)

Peak Output Current

VO ≥ VO(NOM) - 4%

4.5

A

Short Circuit Protection

ISC

Short Circuit Current

6

A

Shutdown Input

VSDT Rising from 0.3V until

1.3

2

Output = ON

VSDT

Shutdown Threshold

V

VSDT Falling from 2.0V until

1.3

0.3

Output = OFF

TdOFF

Turn-off delay

IL = 3A

20

µs

TdON

Turn-on delay

IL = 3A

25

µs

ISD

SD Input Current

VSD = VIN

1

nA

Error Flag

VT

Threshold

(5)

10

5

16

%

VTH

Threshold Hysteresis

(5)

5

2

8

%

VEF(Sat)

Error Flag Saturation

Isink = 100µA

0.02

0.1

V

Td

Flag Reset Delay

1

µs

Ilk

Error Flag Pin Leakage Current

1

nA

Imax

Error Flag Pin Sink Current

VError = 0.5V

1

mA

(1)

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

(2)

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

(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 2.5V, the drop-out voltage is

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

(5)

Error Flag threshold and hysteresis are specified as percentage of regulated output voltage. See Application Hints.

4

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