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Richtek RT7238 | Demoboard EVB_RT7238DGQUF

Synchronous Step-Down Converter’s Evaluation Board for RT7238 Integrated Chip

Overview

TopologyBuck Converter
Input voltage8-23 V
Output 11.05 V / 8 A

Description

The RT7238B/C/D is an advanced constant on-time (ACOT™) mode synchronous step-down converter. The main control loop of RT7238B/C/D using an advanced constant on-time (ACOT™) mode control which provides a very fast transient response. The RT7238B/C/D operates from 8V to 23V input voltage. For the RT7238D, the outputvoltage can be adjusted between 0.6V to 5V. The RT7238B/C/D is available in the UQFN-10L 3x3 (FC) package.

Features

  • Advanced Constant On-Time (ACOT) Control
  • 8V to 23V (RT7238B/C/D) Input Voltage Range @ 8A Output Current
  • ACOT™ Mode Performs Fast Transient Response
  • ACOT™ Architecture to Enable all MLCC Output Capacitor Usage
  • Fixed 500kHz Switching Frequency
  • High Efficient Internal Power MOSFET Switch 27mΩ (High-Side) and 10mΩ (Low-Side)
  • Adjustable Output Voltage from 0.9V to 5V (RT7238D)
  • Fixed 3.3V (RT7238B/D) or 5V (RT7238C) LDO Output Supplies 70mA
  • Pre-biased Soft-Start Cycle-by-Cycle Over-Current Protection
  • Input Under-Voltage Lockout
  • Thermal Shutdown
  • Output Over/Under-Voltage Protection

Typical 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

Products

Order Code Data­sheet Simu­lation Downloads Product seriesL
(µH)
IRP,40K
(A)
ISAT,10%
(A)
ISAT,30%
(A)
RDC max.
(mΩ)
MaterialLR
(µH)
fres
(MHz)
Samples
7443340100SPEC
8 files WE-HCC SMT High Current Cube Inductor 1 18.8 22.9 25.1 3.9 Ferrite 0.97 147
Order Code Data­sheet Simu­lation
7443340100SPEC
Samples
Order Code Data­sheet Simu­lation Downloads Product seriesL
(µH)
IRP,40K
(A)
ISAT,10%
(A)
ISAT,30%
(A)
RDC max.
(mΩ)
MaterialLR
(µH)
fres
(MHz)
Samples