Richtek RT7247A Manual

2A, 18V, 340kHz Synchronous Step-Down Converter
General Description
The RT7247A is a high efficiency, monolithic synchronous
step-down DC/DC converter that can deliver up to 2A
output current from a 4.5V to 18V input supply. The
RT7247A's current mode architecture and external
compensation allow the transient response to be
optimized over a wide input range and loads. Cycle-by-
cycle current limit provides protection against shorted
outputs, and soft-start eliminates input current surge during
start-up. The RT7247A also provides under voltage
protection and thermal shutdown protection. The low
current (<3μA) shutdown mode provides output
disconnection, enabling easy power management in
battery-powered systems. The RT7247A is available in
an SOP-8 (Exposed Pad) package.
Marking Information
RT7247AxGSP : Product Number
RT7247Ax
x : H or L or N
GSPYMDNN
YMDNN : Date Code
Simplified Application Circuit
V
IN
Chip Enable
Copyright © 2016 Richtek Technology Corporation. All rights reserved.
DS7247A-03 October 2016
®
BOOT
VIN
C
IN
RT7247A
SW
EN
SS FB
C
SS
COMP
GND
Features
± ± ± ± ± 1.5% High Accuracy Reference Voltage
    
4.5V to 18V Input Voltage Range
    
2A Output Current
    
Integrated N-MOSFET Switches
    
Current Mode Control
    
Fixed Frequency Operation : 340kHz
    
Output Adjustable from 0.8V to 15V
    
Stable with Low ESR Ceramic Output Capacitors
    
Up to 95% Efficiency
    
Programmable Soft-Start
    
Cycle-by-Cycle Over Current Protection
    
Input Under Voltage Lockout
    
Output Under Voltage Protection
    
Thermal Shutdown Protection
    
RoHS Compliant and Halogen Free
    
Applications
Wireless AP/Router

Set-Top-Box

Industrial and Commercial Low Power Systems

LCD Monitors and TVs

Green Electronics/Appliances

Point of Load Regulation of High-Performance DSPs

C
BOOT
L
R1
C
R2
R
C
C
C
P
is a registered trademark of Richtek Technology Corporation.
Design Sample &
Tools Buy
RT7247A
V
OUT
C
OUT
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