®
RT7248
2A, 18V, 340kHz Synchronous Step-Down Converter
General Description
The RT7248 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 RT7248'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 RT7248
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 RT7248
is available in SOP-8 (Exposed Pad) package.
Features
±
1.5% High Accuracy Feedback Voltage
Input Voltage Range : 4.5V to 18V
2A Output Current
Integrated N-MOSFETs
Current Mode Control
340kHz Fixed Frequency Operation
Output Adjustable Voltage Range : 0.923V to 15V
Efficiency Up to 95%
Programmable Soft-Start
Stable with Low ESR Ceramic Output Capacitors
Cycle-by Cycle Over Current Protection
Input Under Voltage Lockout
Output Under Voltage Protection
Thermal Shutdown Protection
RoHS Compliant and Halogen Free
Marking Information
RT7248xGSP : Product Number
RT7248x
GSPYMDNN
x : H or N
YMDNN : Date Code
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
Simplified Application Circuit
V
IN
C
IN
Chip Enable
VIN
BOOT
RT7248
SW
C
BOOT
L
V
OUT
R1
FB
C
C
COMP
C
P
R
C
R2
C
OUT
EN
SS
C
SS
GND
Copyright
©
2012 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS7248-01
September 2012
www.richtek.com
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RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
