Transcription of M AN761 - Microchip Technology
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M AN761 - Microchip Technology
M AN761 . LDO Thermal Considerations The conservation of power, states that power in must Author: Paul Paglia, equal power out. Consequently, input power is equal to Microchip Technology Inc. the power delivered to the load plus the power dissipated in the LDO, (Equation 1): INTRODUCTION. EQUATION 1: Battery-operated equipment (most notably cell phones and notebook computers) have created a strong PIN = POUT + PLDO. demand for linear regulators in small packages. While such packages save space, they also have poor heat The power dissipation of the LDO is expressed in transfer characteristics. To minimize power dissipation, Equation 2: these regulators are designed to work with very low input/output voltage differentials, hence the name low EQUATION 2: dropout regulators or LDOs.
2002 Microchip Technology Inc. DS00761B-page 1 M AN761 INTRODUCTION Battery-operated equipment (most notably cell phones and notebook computers) have created a …
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