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2A, 18V, 340kHz Synchronous Step-Down Converter

RT7237A

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The RT7237A is a high efficiency, monolithic synchronous step-down DC/DC converter that can deliver up to 2A output current from a 4.5V to 18V input supply. The RT7237A's current mode architecture and external compensation allow the transient response to be optimized over a wide input range and loads. Cycle-by-cycle current limit provides protection against shorted outputs, and soft-start eliminates input current surge during start-up. The RT7237A also provides under voltage protection and thermal shutdown protection. The low current (<3μA) shutdown mode provides output disconnection, enabling easy power management in battery-powered systems. The RT7237A is available in an SOP-8 (Exposed Pad) package.

Applications

  • Wireless AP/Router
  • Set-Top-Box
  • Industrial and Commercial Low Power Systems
  • LCD Monitors and TVs
  • Green Electronics/Appliances
  • Point of Load Regulation of High-Performance DSPs
Key Spec.
RT7237A
Status Active
Vin (min) (V) 4.5
Vin (max) (V) 18
Number of Outputs 1
Vout (min) (V) 0.8
Vout (max) (V) 15
Output Adj. Method Resistor
Iout (max) (A) 2
Current Limit (typ) (A) 4
Freq (typ) (kHz) 340
Ext Sync No
Ron_HS (typ) (mOhm) 150
Ron_LS (typ) (mOhm) 130
Iq (typ) (mA) 0.8
Features Adjustable Soft-Start;Current Mode Control;Enable Input;OCP;PSM;Stable with Ceramic Capacitor;UVP
Package Type PSOP-8
Features
  • ±1.5% High Accuracy Reference Voltage
  • 4.5V to 18V Input Voltage Range
  • 2A Output Current
  • Integrated N-MOSFET Switches
  • Current Mode Control
  • Fixed Frequency Operation : 340kHz
  • Output Adjustable from 0.8V to 15V
  • Stable with Low ESR Ceramic Output Capacitors
  • Up to 95% Efficiency
  • Adjustable Soft-Start
  • Cycle-by-Cycle Current Limit
  • Input Under Voltage Lockout
  • Output Under Voltage Protection
  • Thermal Shutdown Protection
  • RoHS Compliant and Halogen Free
Datasheet
TitleLast UpdateShareDownload
2A, 18V, 340kHz Synchronous Step-Down Converter2012/02/22
Technical Documents
TitleLast UpdateShareDownload
Oct., 2019 Richtek Selection Guide2019/11/06
Compensation Design for Peak Current-Mode Buck Converters2016/07/07
Videos
TitleLast UpdateShareViews
How to estimate control loop bandwidth from the transient response time?2017/03/30 1126
Evaluation Boards
TitleLast UpdateShareDownload
RT7237AHGSP Evaluation Board2018/11/08
Reference Design
TitleLast UpdateShareDownload
Richtek Load Transient Tool2019/01/09
Design Tool
TitleLast UpdateShare
Richtek Designer™ Web Simulation Tool : RT7237AHGSP2020/09/23
Richtek Designer™ Web Simulation Tool : RT7237ALGSP2020/09/23
Richtek Designer™ Web Simulation Tool : RT7237ANGSP2020/09/23
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT7237AHGSPPSOP-82500 Request Buy from Distributor
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