A04474 데이터 시트보기 (PDF) - Richtek Technology
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A04474 Datasheet PDF : 18 Pages
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RT8298
6A, 24V, 600kHz Step-Down Converter with Synchronous
Gate Driver
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.
Applications
z Point of Load Regulator in Distributed Power System
z Digital Set top Boxes
z Personal Digital Recorders
z Broadband Communications
z Flat Panel TVs and Monitors
Features
z 4.5V to 24V Input Voltage Range
z 6A Output Current
z 45mΩ Internal High Side N-MOSFET
z Current Mode Control
z 600kHz Switching Frequency
z Adjustable Output from 0.8V to 15V
z Up to 95% Efficiency
z Internal Compensation
z Stable with Ceramic Capacitors
z Synchronous External Clock : 300kHz to 1.5MHz
z Cycle-by-Cycle Current Limit
z Input Under Voltage Lockout
z Output Under Voltage Protection
z Power Good Indicator
z Thermal Shutdown Protection
z RoHS Compliant and Halogen Free
Simplified Application Circuit
RT8298
VIN
VIN
BOOT
CIN
SW
Power Good
VCC
BG
CVCC
PGOOD
FB
Chip Enable
EN/SYNC
GND
CBOOT
L
Q1
VOUT
R1
COUT
R2
Copyright ©2011 Richtek Technology Corporation. All rights reserved.
DS8298-01 November 2011
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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