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8A, 23V Synchronous Step-Down Converter with 5V LDO

RT6258D

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The RT6258D is an advanced constant on-time (ACOTTM) mode synchronous buck converter. The main control loop of the RT6258D uses an advanced constant on-time (ACOTTM) mode control which provides a very fast transient response. The RT6258D operates from 5.1V to 23V input voltage.

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.
RT6258D
Status Active
Vin (min) (V) 5.1
Vin (max) (V) 23
Number of Outputs 1
Vout (min) (V) 5.049
Vout (max) (V) 5.151
Output Adj. Method Fixed
Iout (max) (A) 8
Current Limit (typ) (A) 14
Freq (typ) (kHz) 750
Ext Sync No
Ron_HS (typ) (mOhm) 20
Ron_LS (typ) (mOhm) 10
Iq (typ) (mA) 0.1
Features ACOT Control;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;OCP;OTP;OVP;PSM;Power Good;Stable with Ceramic Capacitor;UVP;Ultrasonic Mode Control
Package Type UQFN3x3-12H(FC)
Features
  • 5.1V to 23V Input Voltage Range 8A Output Current
  • ACOTTM Mode Performs Fast Transient Response
  • ACOTTM Architecture to Enable All MLCC Output Capacitor Usage
  • Fixed 750kHz Switching Frequency
  • High Efficient Internal Power MOSFET Switch-20mΩ (High-Side) and 10mΩ (Low-Side)
  • Fixed 5V LDO Output Supply 100mA
  • Pre-biased Soft-Start
  • Cycle-by-Cycle Over-Current Protection
  • Input Under-Voltage Lockout
  • Thermal Shutdown Protection
  • Output Over-/Under-Voltage Protection
  • Ultrasonic Mode (USM)
Datasheet
TitleLast UpdateShareDownload
8A, 23V Synchronous Step-Down Converter with 5V LDO2019/04/02
Reference Design
TitleLast UpdateShareDownload
Richtek Load Transient Tool2019/01/09
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