LP38513 datasheet(3/20 Pages) TI1

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LP38513

www.ti.com

SNVS361C – JULY 2007 – REVISED MARCH 2009

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 3A

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 = 2.0V. 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

-1.6

+1.6

10 mA

≤ IOUT ≤ 3A

−4.1

+2.6

VOUT

Output Voltage Tolerance(1)

2.25V

≤ VIN ≤ 5.5V

10 mA

≤ IOUT ≤ 3A

-2.6

+2.6

0°C

≤ TJ ≤ 125°C

Output Voltage Line

0.03

ΔVOUT/ΔVIN

2.25V

≤ VIN ≤ 5.5V

%/V

Regulation(2)(1)

0.06

Output Voltage Load

0.10

ΔVOUT/ΔIOUT

10 mA

≤ IOUT ≤ 3A

%/A

Regulation(3)(1)

0.20

VDO

Dropout Voltage(4)

IOUT = 3A

425.

IOUT = 10 mA

ERROR pin = GND

Ground Pin Current, Output

Enabled

IOUT = 3A

IGND

ERROR pin = GND

VEN = 0.50V

Ground Pin Current, Output

100

µA

Disabled

110

ERROR pin = GND

ISC

Short Circuit Current

VOUT = 0V

5.6

Enable Input

VEN rising from 0.0V until the output

0.74

0.92

VEN(TH)

Enable On/Off Threshold

turns On, or VEN falling from ≥ 2.0V

0.85

0.56

1.00

until the output turns Off

Time from VEN < VEN(TH) to VOUT =

td(OFF)

Turn-off delay

OFF, ILOAD = 3A

µs

Time from VEN >VEN(TH) to VOUT =

td(ON)

Turn-on delay

ON, ILOAD = 3A

VEN = VIN

IEN

Enable Pin Current

VEN = 0V

-1

(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 due to change in the voltage at the

input.

(3)

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

output.

(4)

Dropout voltage (VDO) is typically defined as the input to output voltage differential (VIN - VOUT) where the input voltage is low enough to

cause the output voltage to drop 2% from the nominal value. For the LP38513, the minimum operating voltage of 2.25V is the limiting

factor and the maximum dropout voltage is defined as: VDO(MAX) = VIN(MIN) - VOUT(MIN) = (i.e. 2.25V - (1.80V x 95.9%) = 524 mV)

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