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RT7298A
6A, 18V, Synchronous Step-Down Converter
General Description
Features
Low RDS(ON) Power MOSFET Switches 26mΩ/19mΩ
Input Voltage Range : 4.5V to 18V
Adjustable Switching Frequency : 200kHz to 1.6MHz
Current-Mode Control
The RT7298Ais a high efficiency, monolithic synchronous
step-downDC-DC converter that can deliver up to 6Aoutput
current from a 4.5V to 18V input supply. The RT7298A
current-mode architecture with external compensation
allows the transient response to be optimized over a wide
range of loads and output capacitors. Cycle-by-cycle
current limit provides protection against shorted outputs
and soft-start eliminates input current surge during start-
up. Fault condition protections include output under-voltage
protection, output over-voltage protection, and over-
temperature protection. The low current shutdown mode
provides output disconnection, enabling easy power
management in battery-powered systems.
Synchronous to External Clock : 200kHz to 1.6MHz
Accurate Voltage Reference 0.6V 1%
Monotonic Start-Up into Pre-biased Outputs
Adjustable Soft-Start
Power Good Indicator
Selectable Hiccup Mode and Latch-Off Mode
Under-Voltage Protection
Over-Temperature and Over-Voltage Protection
Input Under-Voltage Lockout
RoHS Compliant and Halogen Free
Applications
High Performance Point of Load Regulation
Notebook Computers
High Density and Distributed Power Systems
Simplified Application Circuit
RT7298A
BOOT
VIN
V
IN
C
IN
C
BOOT
L
PVIN
LX
V
OUT
R1
R2
Enable
EN
FB
C
OUT
PGOOD
PGOOD
R
COMP1
R
OSC
COMP
RT/SYNC
SS/TR
C
COMP1
C
COMP2
C
SS
GND
Copyright 2019 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS7298A-07 June 2019
www.richtek.com
1
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
