LP38693 datasheet(4/27 Pages) TI

Part #	LP38693

Description	LP38693 500mA Low Dropout CMOS Linear Regulators Stable with Ceramic Output Capacitors

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Manufacturer	TI [Texas Instruments]

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LP38691, LP38693

SNVS321K – JANUARY 2005 – REVISED APRIL 2013

www.ti.com

ELECTRICAL CHARACTERISTICS

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 = VOUT + 1V, CIN = COUT = 10 µF, ILOAD = 10mA. Min/Max limits are specified through testing,

statistical correlation, or design.

Symbol

Parameter

Conditions

Min

Typ(1)

Max

Units

-2.0

2.0

VO

Output Voltage Tolerance

%VOUT

100 µA < IL < 0.5A

-4.0

4.0

VO + 1V ≤ VIN ≤ 10V

ΔVO/ΔVIN

Output Voltage Line Regulation(2)

VO + 0.5V ≤ VIN ≤ 10V

0.03

0.1

%/V

IL = 25mA

ΔVO/ΔIL

Output Voltage Load Regulation(3)

1 mA < IL < 0.5A

1.8

5

%/A

VIN = VO + 1V

(VO = 2.5V)

80

145

IL = 0.1A

430

725

IL = 0.5A

(VO = 3.3V)

65

110

VIN - VOUT

Dropout Voltage(4)

IL = 0.1A

mV

330

550

IL = 0.5A

(VO = 5V)

45

100

IL = 0.1A

250

450

IL = 0.5A

IQ

Quiescent Current

VIN ≤ 10V, IL =100 µA - 0.5A

55

100

VEN ≤ 0.4V, (LP38693 Only)

0.001

1

µA

IL(MIN)

Minimum Load Current

VIN - VO ≤ 4V

100

IFB

Foldback Current Limit

VIN - VO > 5V

350

mA

VIN - VO < 4V

850

PSRR

Ripple Rejection

VIN = VO + 2V(DC), with 1V(p-p) /

55

dB

120Hz Ripple

TSD

Thermal Shutdown Activation

160

(Junction Temp)

°C

TSD (HYST)

Thermal Shutdown Hysteresis

10

(Junction Temp)

en

Output Noise

BW = 10Hz to 10kHz

0.7

µV/

√Hz

VO = 3.3V

VO (LEAK)

Output Leakage Current

VO = VO(NOM) + 1V @ 10VIN

0.5

12

µA

VEN

Enable Voltage (LP38693 Only)

Output = OFF

0.4

Output = ON, VIN = 4V

1.8

V

Output = ON, VIN = 6V

3.0

Output = ON, VIN = 10V

4.0

IEN

Enable Pin Leakage (LP38693

VEN = 0V or 10V, VIN = 10V

-1

0.001

1

µA

Only)

(1)

Typical numbers represent the most likely parametric norm for 25°C operation.

(2)

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

(3)

Output voltage load regulation is defined as the change in output voltage from nominal value as the load current increases from 1mA to

full load.

(4)

Dropout voltage is defined as the minimum input to output differential required to maintain the output within 100mV of nominal value.

4

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