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A04474 Datasheet(PDF) 1 Page - Richtek Technology Corporation |
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A04474 Datasheet(HTML) 1 Page - Richtek Technology Corporation |
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1 / 18 page  1 DS8298-01 November 2011 www.richtek.com RT8298 Copyright 2011 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. © ® Simplified Application Circuit General Description The RT8298 is a synchronous step-down DC/DC converter with an integrated high side internal power MOSFET and a gate driver for a low side external power MOSFET. It can deliver up to 6A output current from a 4.5V to 24V input supply. The RT8298's current mode architecture allows the transient response to be optimized over a wider input voltage and load range. Cycle-by-cycle current limit provides protection against shorted outputs and soft-start eliminates input current surge during start-up. The RT8298 is synchronizable to an external clock with frequency ranging from 300kHz to 1.5MHz. The RT8298 is available in WDFN-14L 4x3 and SOP-8 (Exposed Pad) packages. 6A, 24V, 600kHz Step-Down Converter with Synchronous Gate Driver Features 4.5V to 24V Input Voltage Range 6A Output Current 45m Ω Ω Ω Ω Ω Internal High Side N-MOSFET Current Mode Control 600kHz Switching Frequency Adjustable Output from 0.8V to 15V Up to 95% Efficiency Internal Compensation Stable with Ceramic Capacitors Synchronous External Clock : 300kHz to 1.5MHz Cycle-by-Cycle Current Limit Input Under Voltage Lockout Output Under Voltage Protection Power Good Indicator Thermal Shutdown Protection RoHS Compliant and Halogen Free Applications Point of Load Regulator in Distributed Power System Digital Set top Boxes Personal Digital Recorders Broadband Communications Flat Panel TVs and Monitors RT8298 VIN CIN VIN VCC CVCC PGOOD Power Good EN/SYNC FB BG SW BOOT CBOOT L VOUT COUT R1 R2 Chip Enable GND Q1 |
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