RT7248 Datasheet, PDF (1/15 Pages) Richtek Technology Corporation – 2A, 18V, 340kHz Synchronous Step-Down Converter

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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.
Marking Information
RT7248x
GSPYMDNN
RT7248xGSP : Product Number
x : H or N
YMDNN : Date Code
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
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
C_SS
VIN
BOOT
RT7248
SW
EN
SS
FB
GND
COMP
C_{BOOT L}
C_{C RC}
C_P
V_OUT
R1
C_OUT
R2
Copyright ©2012 Richtek Technology Corporation. All rights reserved.
DS7248-01 September 2012
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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