MIC5321 datasheet(10/26 Pages) MICROCHIP

部件名	MIC5321

功能描述	High-Performance, Dual 150 mA 關Cap Ultra-Low Dropout Regulator

PDF	26 Pages

Scroll/Zoom	100%

制造商	MICROCHIP [Microchip Technology]

网页	http://www.microchip.com

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10 / 26 page

MIC5321

DS20006678A-page 10



2022 Microchip Technology Inc. and its subsidiaries

Substituting PD for PD(MAX) and solving for the ambient

operating temperature will give the maximum operating

conditions

for

the

regulator

circuit.

The

junction-to-ambient thermal resistance for the

minimum footprint is 100°C/W.

The maximum power dissipation must not be exceeded

for proper operation.

For example, when operating the MIC5321-MFYMT at

an input voltage of 3.3V and 150 mA loads at each

output with a minimum footprint layout, the maximum

ambient operating temperature TA can be determined

as follows:

EQUATION 4-4:

Therefore, a 2.8V/1.5V application with 150 mA at each

output current can accept an ambient operating

temperature of 90.5°C in a 1.6 mm x 1.6 mm UDFN

package. For a full discussion of heat sinking and

thermal effects on voltage regulators, refer to the

“Regulator Thermals” section of Microchip’s Designing

with Low-Dropout Voltage Regulators handbook.

0.345W

125C TA

–





100C/W







90.5C

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