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3A, 18V, 700kHz ACOT™ Synchronous Step-Down Converter

RT7266

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The RT7266 is an adaptive on-time ACOTTM mode synchronous buck converter. The adaptive on-time ACOTTM 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 0.765V and 8V. The soft-start is adjustable by an external capacitor.

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
Key Spec.
RT7266
Status Active
Vin (min) (V) 4.5
Vin (max) (V) 18
Number of Outputs 1
Vout (min) (V) 0.765
Vout (max) (V) 8
Preset Vout (V)
Output Adj. Method Resistor
Iout (max) (A) 3
Current Limit (typ) (A) 4.1
Freq (typ) (kHz) 700
Freq (min) (kHz)
Freq (max) (kHz)
Ext Sync No
Ron_HS (typ) (mOhm) 90
Ron_LS (typ) (mOhm) 60
Iq (typ) (mA) 0.7
Features ACOT Control;Adjustable Soft-Start;Enable Input;Fast Transient Response;OCP;PSM;Stable with Ceramic Capacitor
Package Type PSOP-8
Features
  • ACOTTM Mode Enables Fast Transient Response
  • 4.5V to 18V Input Voltage Range
  • 3A Output Current
  • 60mΩ Internal Low Site N-MOSFET
  • Adaptive On-Time Control
  • Fast Transient Response
  • Support All Ceramic Capacitors
  • Up to 95% Efficiency
  • 700kHz Switching Frequency
  • Adjustable Output Voltage from 0.765V to 8V
  • Adjustable Soft-Start
  • Cycle-by-Cycle Current Limit
  • Input Under Voltage Lockout
  • Thermal Shutdown Protection
  • RoHS Compliant and Halogen Free
Datasheet
TitleLast UpdateShareDownload
3A, 18V, 700kHz ACOT™ Synchronous Step-Down Converter2011/11/16
Reliability
Title Last Update ShareDownload
3A, 18V, 700kHz ACOT™ Synchronous Step-Down Converter 2015/05/19
Technical Documents
TitleLast UpdateShareDownload
ACOT™ Stability Testing2019/03/18
ACOT™ (Advanced Constant-On Time) Synchronous Step-Down Converters2018/11/15
Comparing Buck Converter Topologies2018/09/20
Buck Converter Selection Criteria2016/08/04
The Calculation of Output DC Offset for ACOT™ Control Buck Converter with Feed-forward Compensator2016/07/07
Videos
TitleLast UpdateShareViews
How to estimate control loop bandwidth from the transient response time?2017/03/30 522
Reference Design
TitleLast UpdateShareDownload
Richtek Load Transient Tool2018/11/01
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT7266ZSPPSOP-82500 Not available Buy from Distributor
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