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3A, 36V, 500kHz Synchronous Step-Down Converter

RT7272A

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The RT7272A is a high efficiency, current mode synchronous step-down DC/DC converter that can deliver up to 3A output current over a wide input voltage range from 4.5V to 36V. The device integrates a 150mΩ high side and a 80mΩ low side MOSFET to achieve high conversion efficiency up to 95%. The current mode control architecture supports fast transient response and simple compensation circuit.

A cycle-by-cycle current limit function provides protection against shorted output and an internal soft-start eliminates input current surge during start-up. The RT7272A provides complete protection functions such as input under voltage lockout, output under voltage protection, over current protection and thermal shutdown.

The RT7272A is available in the thermal enhanced SOP-8 (Exposed Pad) package.

Applications

  • Distributed Power Systems
  • Pre-Regulator for Linear Regulators
  • Notebook Computers
  • Point of Load Regulator in Distributed Power System
  • Digital Set-top Boxes
  • Personal Digital Recorders
  • Broadband Communications
  • Flat Panel TVs and Monitors
  • Vehicle Electronics
Key Spec.
RT7272A
Status Active
Vin (min) (V) 4.5
Vin (max) (V) 36
Number of Outputs 1
Vout (min) (V) 0.8
Vout (max) (V) 30
Output Adj. Method Resistor
Iout (max) (A) 3
Freq (typ) (kHz) 500
Ext Sync No
Ron_HS (typ) (mOhm) 150
Ron_LS (typ) (mOhm) 80
Iq (typ) (mA) 0.9
Features Adjustable Current Limit;Current Mode Control;Enable Input;Force PWM;OCP;Stable with Ceramic Capacitor;UVP
Package Type PSOP-8
Features
  • 4.5V to 36V Input Voltage Range
  • 3A Output Current
  • Internal N-MOSFETs
  • Current Mode Control
  • Fixed Frequency Operation : 500kHz
  • Adjustable Output Voltage from 0.8V to 30V
  • High Efficiency Up to 95%
  • Stable with Low ESR Ceramic Output Capacitors
  • Cycle-by-Cycle Current Limit
  • Input Under Voltage Lockout
  • Output Under Voltage Protection
  • Thermal Shutdown Protection
  • Adjustable Current Limit
  • RoHS Compliant and Halogen Free
Datasheet
TitleLast UpdateShareDownload
3A, 36V, 500kHz Synchronous Step-Down Converter2013/03/29
Technical Documents
TitleLast UpdateShareDownload
DC/DC Converter Testing with Fast Load Transient2019/06/04
Automotive Product Selection Guide2018/11/15
Richtek Wide Input Voltage Range DC/DC Power Solutions for Industrial, Automotive and LED lighting applications2018/11/01
Videos
TitleLast UpdateShareViews
How to estimate control loop bandwidth from the transient response time?2017/03/30 620
Evaluation Boards
TitleLast UpdateShareDownload
RT7272AGSP Evaluation Board2018/11/08
Reference Design
TitleLast UpdateShareDownload
Richtek Load Transient Tool2019/01/09
Design Tool
TitleLast UpdateShare
Richtek Designer™ Web Simulation Tool : RT7272AGSP2019/09/11
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT7272AGSPPSOP-82500 Request Buy from Distributor
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