RT7263B Datasheet, PDF (1/15 Pages) Richtek Technology Corporation – 3A, 21V 500kHz Synchronous Step-Down Converter

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RT7263B
3A, 21V 500kHz Synchronous Step-Down Converter
General Description
The RT7263B is a synchronous step-down regulator with
an internal power MOSFET. It achieves 3A of continuous
output current over a wide input supply range with excellent
load and line regulation. Current mode operation provides
fast transient response and eases loop stabilization.
Fault condition protection includes cycle-by-cycle current
limiting and thermal shutdown. An adjustable soft-start
reduces the stress on the input source at startup.
The RT7263B requires a minimal number of readily
available external components, providing a compact
solution.
Ordering Information
RT7263B
Package Type
QW : WDFN-14L 4x3 (W-Type)
Lead Plating System
Z : ECO (Ecological Element with
Halogen Free and Pb free)
Note :
Richtek products are :
` RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
` Suitable for use in SnPb or Pb-free soldering processes.
Features
z Wide Input Range : 4.5V to 21V
z Adjustable Output from 0.603V to 15V
z 3A Output Current
z 120mΩ/40mΩ Internal Power MOSFET Switch
z Internal Compensation Minimizes External Parts
z 500kHz Fixed Switching Frequency
z Synchronized External Clock from 300kHz to 2MHz
z Adjustable Soft-Start
z Cycle-by-Cycle Over Current Limit
z Thermal Shutdown Protection
z Small 14-Lead WDFN Package
z RoHS Compliant and Halogen Free
Applications
z Distributive Power Systems
z Battery Charger
z DSL Modems
z Pre-Regulator for Linear Regulators
Marking Information
10 : Product Code
10 YM
DNN
YMDNN : Date Code
Simplified Application Circuit
V_IN
C_IN
C_C
SYNC
ON/OFF
VIN
BOOT
RT7263B
VCC
SW
SYNC
EN
AGND
FB
SS
GND
C_BOOT
L
R1
R_T
C_SS
R2
V_OUT
C_OUT
Copyright ©2012 Richtek Technology Corporation. All rights reserved.
DS7263B-01 September 2012
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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