®
RT7266
3A, 18V, 700kHz ACOT
TM
Synchronous Step-Down
Converter
General Description
The RT7266 is an adaptive on-time ACOT
TM
mode
synchronous buck converter. The adaptive on-time ACOT
TM
mode control provides a very fast transient response with
few external components. The low impedance internal
MOSFET can support high efficiency operation with wide
input voltage range from 4.5V to 18V . The proprietary
circuit of the RT7266 enables to support all ceramic
capacitors. The output voltage can be adjustable between
0.8V and 8V. The soft-start is adjustable by an external
capacitor.
Features
ACOT
TM
Mode Enables Fast Transient Response
4.5V to 18V Input Voltage Range
3A Output Current
60mΩ Internal Low Site N-MOSFET
Ω
Adaptive On-Time Control
Fast Transient Response
Support All Ceramic Capacitors
Up to 95% Efficiency
700kHz Switching Frequency
Adjustable Output Voltage from 0.8V to 8V
Adjustable Soft-Start
Cycle-by-Cycle Current Limit
Input Under Voltage Lockout
Thermal Shutdown Protection
RoHS Compliant and Halogen Free
Ordering Information
RT7266
Package Type
SP : SOP-8 (Exposed Pad-Option 2)
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.
Applications
Industrial and Commercial Low Power Systems
Computer Peripherals
LCD Monitors and TVs
Green Electronics/Appliances
Point of Load Regulation for High-Performance DSPs,
FPGAs, and ASICs
Marking Information
RT7266ZSP : Product Number
Pin Configurations
(TOP VIEW)
EN
FB
PVCC
SS
2
3
4
8
RT7266
ZSPYMDNN
YMDNN : Date Code
VIN
BOOT
SW
GND
7
6
5
GND
9
SOP-8 (Exposed Pad)
Copyright
©
2012 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS7266-02
September 2012
www.richtek.com
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RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
