LP38512 datasheet(3/21 Pages) TI

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LP38512

www.ti.com

SNOSAU7F – NOVEMBER 2007 – REVISED APRIL 2013

Operating Ratings

(1)

Input Supply Voltage, VIN

2.25V to 5.5V

Enable Input Voltage, VEN

0.0V to 5.5V

ERROR Pin Voltage

0.0V to VIN

Output Current (DC)

0 mA to 1.5A

Junction Temperature (2)

−40°C to +125°C

(1)

Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for

which the device is intended to be functional, but does not ensure specific performance limits. For ensured specifications and conditions,

see the Electrical Characteristics.

(2)

Device operation must be evaluated, and derated as needed, based on ambient temperature (TA), power dissipation (PD), maximum

allowable operating junction temperature (TJ(MAX)), and package thermal resistance (θJA).

Electrical Characteristics

Unless otherwise specified: VIN = 2.5V, IOUT = 10 mA, CIN = 10 µF, COUT = 10 µF, VEN = VIN. Limits in standard type are for TJ

= 25°C only; limits in boldface type apply over the junction temperature (TJ) range of -40°C to +125°C. Minimum and

Maximum limits are specified through test, design, or statistical correlation. Typical values represent the most likely

parametric norm at TJ = 25°C, and are provided for reference purposes only.

Symbol

Parameter

Conditions

Min

Typ

Max

Units

2.25V

≤ VIN ≤ 5.5V

-1.0

+1.0

VOUT

Output Voltage Tolerance(1)

10 mA

≤ IOUT ≤ 1.5A

−2.5

+2.5

Output Voltage Line Regulation

0.02

ΔVOUT/ΔVIN

2.25V

≤ VIN ≤ 5.5V

%/V

(2) (1)

0.06

Output Voltage Load

0.25

ΔVOUT/ΔIOUT

10 mA

≤ IOUT ≤ 1.5A

%/A

Regulation(3) (1)

0.40

340

VDO

Dropout Voltage(4)

IOUT = 1.5A

250

400

IOUT = 10 mA

7.5

ERROR pin = GND

Ground Pin Current, Output

Enabled

IOUT = 1.5A

IGND

9.5

ERROR pin = GND

Ground Pin Current, Output

VEN = 0.50V

3.5

0.1

µA

Disabled

ERROR pin = GND

ISC

Short Circuit Current

VOUT = 0V

2.5

Enable Input

VEN rising from 0.50V until VOUT =

0.90

1.50

VEN(ON)

Enable ON Threshold

1.20

0.80

1.60

VEN falling from 1.60V until VOUT =

0.60

1.40

VEN(OFF)

Enable OFF Threshold

1.00

OFF

0.50

1.50

VEN(HYS)

Enable Hysteresis

VEN(ON) - VEN(OFF)

200

Time from VEN < VEN(OFF) to VOUT =

td(OFF)

Turn-off delay

OFF, ILOAD = 1.5A

µs

Time from VEN >VEN(ON) to VOUT =

td(ON)

Turn-on delay

ON, ILOAD = 1.5A

VEN = VIN

IEN

Enable Pin Current

VEN = 0V

-1

ERROR Flag

(1)

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.

(2)

Output voltage line regulation is defined as the change in output voltage from the nominal value (

ΔVOUT) due to a change in the voltage

at the input (

ΔVIN).

(3)

Output voltage load regulation is defined as the change in output voltage from the nominal value (

ΔVOUT) due to a change in the load

current at the output (

ΔIOUT).

(4)

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

the LP38512-1.8 the minimum VIN operating voltage is the limiting factor.

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