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RT6543BGQW
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Product Detailed Parameters
- Description：IC REG CTRLR BUCK PWM WQFN-20
- 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)：3V ~ 24V
- Frequency - Switching：400kHz, 600kHz, 800kHz
- 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 ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：20-WFQFN Exposed Pad
- Supplier Device Package：20-WQFN (3x3)
- Grade：-
- Qualification：-
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Overview
The RT6543BGQW is a high-efficiency single synchronous buck PWM controller designed for Intel VCCIN, AUX, ICL, and TGL applications. It operates with an input voltage range of 3V to 24V and provides a programmable output voltage from 0V to 1.8V via VID inputs. The device supports adjustable switching frequencies of 400kHz, 600kHz, and 800kHz. It features external synchronous rectification MOSFETs, a static current of 300µA, and operates within a junction temperature range of -40°C to +125°C.
Feature Summary
- Supports on-chip voltage programming between 0V and 1.8V through VID1/VID0 inputs
- Eliminates the need for current sense resistors by driving external synchronous rectifier MOSFETs
- Integrates comprehensive protection mechanisms including UVLO, OVP, UVP, OTP, and cycle-by-cycle current limiting
- Optimizes efficiency in light-load conditions through diode emulation mode operation
Applications
- Intel VCCIN power supply stages
- Auxiliary voltage regulation for CPU platforms
- ICL (Integrated Core Logic) power distribution
- TGL (Tiger Lake) processor core voltage generation
Procurement Notes
Verify the specific suffix 'GQW' corresponds to the WQFN-20-EP (3x3mm) package and tape-and-reel shipping configuration. Confirm that the component meets RoHS compliance standards as indicated in manufacturer documentation. Ensure compatibility with the required switching frequency setting for your target application design.
Selection Notes
Select this controller when designing for Intel architectures requiring precise low-voltage regulation without external current sensing components. The external MOSFET drive capability allows designers to optimize thermal performance and efficiency based on specific load requirements. Ensure the chosen switching frequency aligns with passive component selection constraints.
Part Context
This component belongs to the RT6543A/B family of DC-DC switching controllers manufactured by Richtek USA Inc. These devices are engineered specifically for demanding computing applications where high efficiency and fast transient response are critical. The family integrates advanced control algorithms to maintain stability across varying load conditions.
Replacement Considerations
The RT6543AGQW is a verified substitute within the same product family, sharing identical functional specifications and pinout configurations. Both variants utilize the WQFN-20 package and support the same input/output ranges and protection features.
