RT8237EZQW

Description：IC REG CTRLR BUCK PWM WDFN-10
Series：-
Mfr：Richtek USA Inc.
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:1a3c3bb370d4 Category: DC DC Switching Controllers Brand: Richtek USA Inc.

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Product introduction

Product Detailed Parameters

Description：IC REG CTRLR BUCK PWM WDFN-10
Series：-
Mfr：Richtek USA Inc.
Package：Tape & Reel (TR),Cut Tape (CT)
Output Type：Transistor Driver
Function：Step-Down
Output Configuration：Positive
Topology：Buck
Number of Outputs：1
Output Phases：1
Voltage - Supply (Vcc/Vdd)：4.5V ~ 26V
Frequency - Switching：290kHz ~ 430kHz
Duty Cycle (Max)：-
Synchronous Rectifier：Yes
Clock Sync：Yes
Serial Interfaces：-
Control Features：Current Limit, Enable, Phase Control, Power Good, Soft Start
Operating Temperature：-40°C ~ 85°C (TA)
Mounting Type：Surface Mount
Package / Case：10-WFDFN Exposed Pad
Supplier Device Package：10-WDFN (3x3)
Grade：-
Qualification：-

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RT8237EZQW

Overview

The RT8237EZQW is a high-efficiency single synchronous buck PWM controller manufactured by Richtek USA Inc. It utilizes a constant on-time control scheme to handle wide input and output voltage ratios while maintaining a relatively constant switching frequency. The device eliminates the need for an external current sense resistor, reducing design costs and enhancing efficiency. It features adjustable frequency selection ranging from 290kHz to 430kHz, with a typical value of 340kHz. The input voltage range spans from 2.7V to 26V, supporting output voltages from 0.7V to 3.3V with 0.5% accuracy. It operates within a temperature range of -40°C to 85°C and is housed in a WDFN-10L 3x3 package.

Feature Summary

Constant on-time PWM control architecture provides excellent transient response and instant-on capability.
Eliminates the requirement for an external current sense resistor to lower circuit design costs.
Capable of driving large synchronous rectifier MOSFETs and entering diode emulation mode at light loads.
Offers pre-set frequency selections to minimize design effort for new applications.

Applications

CPU core supply in notebook computers
Chipset and RAM power supplies
Low voltage generic DC-DC power regulators

Procurement Notes

Verify the specific suffix 'EZQW' against the official Richtek datasheet to confirm pinout compatibility and thermal pad configuration. Ensure that the ordering documentation explicitly matches the WDFN-10L 3x3 package dimensions. Cross-reference the manufacturing date code and lot number with the component marking to guarantee authenticity and traceability during the procurement process.

Selection Notes

Select this controller when designing systems requiring high efficiency without the complexity of current-mode sensing resistors. It is suitable for applications needing fast transient response and adjustable switching frequencies between 290kHz and 430kHz. Consider its 2.7V minimum input voltage for battery-powered devices and its ability to support outputs as low as 0.7V for modern processor cores.

Part Context

The RT8237 series belongs to Richtek's portfolio of high-performance synchronous buck controllers designed for portable electronics. This specific model targets the demanding power requirements of mobile computing platforms, offering a compact solution for stepping down battery voltages to stable low-voltage rails for critical system components like CPUs and memory.