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


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The RT7252A/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 RT7252A/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 RT7252A/B is available in a SOP-8 (Exposed Pad) package.


  • 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.
RT7252A RT7252B
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;Enable Input;Internal Compensation;OCP;OVP;PSM;Power Good;Stable with Ceramic Capacitor;UVP Current Mode Control;Enable Input;Internal Compensation;OCP;OVP;PSM;Power Good;Stable with Ceramic Capacitor;UVP
Package Type PSOP-8 PSOP-8
  • 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
TitleLast UpdateShareDownload
2A, 17V, 340/800kHz Synchronous Step-Down Converter2011/12/16
Technical Documents
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DC/DC Converter Testing with Fast Load Transient2019/06/04
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How to estimate control loop bandwidth from the transient response time?2017/03/30 817
Evaluation Boards
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RT7252BZSP Evaluation Board2018/11/08
Reference Design
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Richtek Load Transient Tool2019/01/09
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT7252BZSPPSOP-82500 Not available Buy from Distributor