LP38692SD-2.5 datasheet(4/28 Pages) TI1

Part #	LP38692SD-2.5

Description	1A Low Dropout CMOS Linear Regulators Stable with Ceramic Output Capacitors

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Manufacturer	TI1 [Texas Instruments]

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ENABLE

LOGIC

-

+

MOSFET

DRIVER

FOLDBACK

CURRENT

LIMITING

1.25V

REFERENCE

THERMAL

SHUTDOWN

VIN

VOUT

GND

P-FET

N/C

R1

R2

SNS

LP38690, LP38692

SNVS322J – DECEMBER 2004 – REVISED APRIL 2013

www.ti.com

ELECTRICAL CHARACTERISTICS (continued)

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

IQ

Quiescent Current

VIN ≤ 10V, IL =100 µA - 1A

55

100

VEN ≤ 0.4V, (LP38692 Only)

0.001

1

µA

IL(MIN)

Minimum Load Current

VIN - VO ≤ 4V

100

IFB

Foldback Current Limit

VIN - VO > 5V

450

mA

VIN - VO < 4V

1500

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 (LP38692 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

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

-1

0.001

1

µA

BLOCK DIAGRAMS

Figure 5. LP38690 Functional Diagram (WSON)

4

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