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SC4603 - High Efficiency Synchronous Buck

Description

The SC4603 is a voltage mode step down (buck) regulator controller that provides accurate high efficiency power conversion from input supply range 2.25V to 5.5V.

Features

  • ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ BICMOS voltage mode PWM controller 2.25V to 5.5V Input voltage range Output voltages as low as 0.5V Sleep mode (Icc = 10µA typ) Lossless adjustable overcurrent protection Combination pulse by pulse & hiccup mode current limit High efficiency synchronous switching 0% to 100% Duty cycle range Synchronization to external clock Asynchronous start-up 1MHz frequency of operation 10-Pin MSOP surface mount package.

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Datasheet preview – SC4603

Datasheet Details

Part number SC4603
Manufacturer Semtech Corporation
File Size 360.13 KB
Description High Efficiency Synchronous Buck
Datasheet download datasheet SC4603 Datasheet
Additional preview pages of the SC4603 datasheet.

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Full PDF Text Transcription

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Very Low Input, MHz Operation, High Efficiency Synchronous Buck POWER MANAGEMENT Description The SC4603 is a voltage mode step down (buck) regulator controller that provides accurate high efficiency power conversion from input supply range 2.25V to 5.5V. A high level of integration reduces external component count and makes it suitable for low voltage applications where cost, size and efficiency are critical. The SC4603 drives external complementary power MOSFETs; P-channel on the high side and N-channel on www.DataSheet4U.com the low side. The use of high side P-channel MOSFETs eliminates the need for an external charge pump and simplifies the high side gate driver. Non-overlap protection is provided for the gate drive signals to prevent shoot through of the MOSFET pair.
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