RT7262A Datasheet, PDF (1/17 Pages) Richtek Technology Corporation – 2A, 21V 500kHz Synchronous Step-Down Converter

®
RT7262A
2A, 21V 500kHz Synchronous Step-Down Converter
General Description
The RT7262A is a synchronous step-down regulator with
integrated power MOSFETs. It achieves 2A 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 start-up.
The RT7262A requires a minimal number of readily
available external components, providing a compact
solution.
Ordering Information
RT7262A
Package Type
QW : WDFN-14L 4x3 (W-Type)
SP : SOP-8 (Exposed Pad-Option 2)
Note :
Lead Plating System
Z : ECO (Ecological Element with
Halogen Free and Pb free)
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 0.808V to 15V
z 2A Output Current
z 150mΩ/60mΩ 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 Available in SOP-8 (Exposed Pad) and WDFN-14L
4x3 Packages
z RoHS Compliant and Halogen Free
Applications
z Distributive Power Systems
z Battery Charger
z DSL Modems
z Pre-Regulator for Linear Regulators
Simplified Application Circuit
V_IN
Chip Enable
VIN
BOOT
C_IN
RT7262A
SW
EN/SYNC
VCC
FB
C_C
GND
C_{BOOT L}
R_T
R1
R2
V_OUT
C_OUT
Copyright ©2012 Richtek Technology Corporation. All rights reserved.
DS7262A-01 September 2012
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1