AMC887-1.8DBT datasheet(2/9 Pages) ADDTEK

Part #	AMC887-1.8DBT

Description	LOW NOISE 150mA LOW DROPOUT REGULATOR

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Manufacturer	ADDTEK [ADDtek Corp]

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AMC8878/8879

Copyright

2

DD067_G -- JUNE 2006

TYPICAL APPLICATION

ABSOLUTE MAXIMUM RATINGS

(Note)

Input Voltage, VIN

12V

Operating Junction Temperature, TJ

150

OC

Storage Temperature Range

-65

OC to +150 OC

Lead Temperature (soldering, 10 seconds)

+260

OC

Power Dissipation, PD @ TA = 70

OC

150 mW

Note:

Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into,

negative out of the specified terminal.

THERMAL DATA

DB PACKAGE:

Thermal Resistance from Junction to Ambient,

θ JA

220

OC /W

Junction Temperature Calculation: TJ = TA+ (PD × θ JA).

The

θ

JA numbers are guidelines for the thermal performance of the device/pc-board system.

Connect the ground pin to ground using a large pad or ground plane for better heat dissipation.

All of the above assume no ambient airflow.

Maximum Power Calculation:

TJ(MAX) – TA(MAX)

PD(MAX)=

θJA

TJ(

OC): Maximum recommended junction temperature

TA(

OC): Ambient temperature of the application

θJA(OC /W): Junction-to-junction temperature thermal resistance of the package, and other heat dissipating

materials.

The maximum power dissipation for a single-output regulator is :

PD(MAX) = [(VIN(MAX) - VOUT(NOM))] × IOUT(NOM) + VIN(MAX) × IQ

Where: VOUT(NOM) = the nominal output voltage

IOUT(NOM) = the nominal output current, and

IQ = the quiescent current the regulator consumes at IOUT(MAX)

VIN(MAX) = the maximum input voltage

Then

θ

JA = (+150

OC – TA)/PD

VOUT

COUT

1

µF

CIN

1

µF

VIN

2.5V to 6V

ON

OFF

AMC8878

AMC8879

CBP

0.01

µF

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