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RT8237HGQW(2)
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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 ~ 5.5V
- Frequency - Switching：290kHz ~ 430kHz
- Duty Cycle (Max)：-
- Synchronous Rectifier：Yes
- Clock Sync：No
- Serial Interfaces：-
- Control Features：Current Limit, Dead Time Control, Enable, Frequency Control, 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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Overview
The RT8237HGQW(2) 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-to-output voltage ratios while maintaining a relatively constant switching frequency. The device eliminates the external current sense resistor, reducing component count and cost. It features an 'instant-on' response to load transients and drives large synchronous rectifier MOSFETs for enhanced efficiency. Designed for notebook computers, it steps down high-voltage batteries to generate low-voltage CPU core, I/O, and chipset RAM supplies. The output voltage is adjustable from 0.7V to 3.3V with 0.5% accuracy.
Feature Summary
- Constant on-time PWM control scheme for wide input/output voltage ratios
- Eliminates external current sense resistor to reduce cost and improve efficiency
- 100ns instant-on response to load transients
- Diode emulation mode operation at light load conditions
Applications
- Notebook computer CPU core supply
- Chipset and DRAM power supply
- Low voltage generic DC-DC power regulator
Procurement Notes
Verify the specific suffix HGQW(2) against the manufacturer's official datasheet to confirm package type and tape/reel specifications. Ensure compatibility with the required input voltage range of 2.7V to 26V and output requirements. Cross-reference the ordering part number with authorized distributors to avoid counterfeit components. Confirm RoHS compliance status if required for your assembly 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 the WDFN-10L 3x3 package size for space-constrained designs. Ensure the application does not require external clock synchronization, as this feature is absent in this model.
Part Context
This component belongs to the RT8237 family of single synchronous buck PWM controllers. It is designed specifically for portable computing applications where battery life and thermal management are critical. The family offers various suffixes indicating different packages or temperature grades, but all share the core COT control architecture and high-efficiency characteristics for stepping down battery voltages.
Replacement Considerations
Public confirmed substitute part numbers were not identified in the provided documentation. Verify pinout and electrical parameters carefully if considering alternative manufacturers. No direct cross-reference data is available in the source material.
