AMC8877-3.2DBT datasheet(2/9 Pages) ETC

2 / 9 page

AMC DOC. #: AMC8877_A (LF)

AMC8877

Jun 2004

LOW NOISE 300mA

LOW DROPOUT REGULATOR

TYPICAL APPLICATION

CBP

0.01

µF

AMC8877

OFF

VIN

2.5V to 6V

CIN

µF

COUT

µF

VOUT

ABSOLUTE MAXIMUM RATINGS

(Note)

Input Voltage, VIN

12V

Operating Junction Temperature, TJ

150

Storage Temperature Range

-65

OC to +150 OC

Lead Temperature (soldering, 10 seconds)

+260

Power Dissipation, PD @ TA = 70

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

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

JA = (+150

OC – TA)/PD

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