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2A, 17V, 340/800kHz Synchronous Step-Down Converter

RT7250A/RT7250B

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The RT7250A/B is a high efficiency, monolithic synchronous step-down DC-DC converter that can operate at 340kHz/800kHz, while delivering up to 2A output current from a 4V to 17V input supply. The RT7250A/B's current mode architecture allows the transient response to be optimized. Cycle-by-cycle current limit provides protection against shorted outputs and soft-start eliminates input current surge during start-up. Fault conditions also include output under voltage protection, output over voltage protection and thermal shutdown. The low current (<5μA) shutdown mode provides output disconnection, enabling easy power management in battery-powered systems. The RT7250A/B is available in a SOP-8 (Exposed Pad) package.

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.
RT7250A RT7250B
Status Active Active
Vin (min) (V) 4 4
Vin (max) (V) 17 17
Number of Outputs 1 1
Vout (min) (V) 0.8 0.8
Vout (max) (V) 12 12
Output Adj. Method Resistor Resistor
Iout (max) (A) 2 2
Current Limit (typ) (A) 3.6 3.6
Freq (typ) (kHz) 340 800
Ext Sync No No
Ron_HS (typ) (mOhm) 155 155
Ron_LS (typ) (mOhm) 150 150
Iq (typ) (mA) 0.6 0.6
Features Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;Force PWM;Internal Compensation;OCP;OTP;OVP;Power Good;Stable with Ceramic Capacitor;UVP Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;Force PWM;Internal Compensation;OCP;OTP;OVP;Power Good;Stable with Ceramic Capacitor;UVP
Package Type PSOP-8 PSOP-8
Features
  • 4V to 17V Input Voltage Range
  • 2A Output Current
  • Internal N-MOSFETs
  • Current Mode Control
  • Fixed Frequency Operation : 340kHz/800kHz
  • Output Adjustable from 0.8V to 12V
  • Up to 95% Efficiency
  • Internal Compensation
  • Stable with Low ESR Ceramic Output Capacitors
  • Cycle-by-Cycle Over Current Protection
  • Input Under Voltage Lockout
  • Output Under Voltage Protection
  • Output Over Voltage Protection
  • Power Good Indicator
  • Thermal Shutdown Protection
  • RoHS Compliant and Halogen Free
Datasheet
TitleLast UpdateShareDownload
2A, 17V, 340/800kHz Synchronous Step-Down Converter2011/12/16
Reliability
Title Last Update ShareDownload
2A, 17V, 340/800kHz Synchronous Step-Down Converter 2015/05/19
Technical Documents
TitleLast UpdateShareDownload
Richtek Selection Guide [Oct., 2020]2020/12/30
Videos
TitleLast UpdateShareViews
How to estimate control loop bandwidth from the transient response time?2017/03/30 1379
Evaluation Boards
TitleLast UpdateShareDownload
RT7250BZSP Evaluation Board2021/01/21
Reference Design
TitleLast UpdateShareDownload
Richtek Load Transient Tool2021/01/21
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT7250AZSPPSOP-82500 Not available Buy from Distributor
RT7250BZSPPSOP-82500 Not available Buy from Distributor
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