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RT8240BZQW
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Product Detailed Parameters
- Description：IC REG CTRLR BUCK 12WQFN
- Series：-
- Mfr：Richtek USA Inc.
- Package：Tape & Reel (TR)
- 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：400kHz
- Duty Cycle (Max)：-
- Synchronous Rectifier：Yes
- Clock Sync：No
- Serial Interfaces：-
- Control Features：Current Limit, Enable, Phase Control, Power Good
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：12-WFQFN Exposed Pad
- Supplier Device Package：12-WQFN (2x2)
- Grade：-
- Qualification：-
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Overview
The RT8240BZQW is a high-efficiency single synchronous buck PWM controller designed for local sensing applications. It provides excellent transient response and high DC output accuracy, enabling the stepping down of high voltage batteries to generate low voltage CPU core, I/O, and chipset RAM supplies in notebook computers. The device operates with a switching frequency of 400kHz and utilizes a 12-pin WQFN EP package.
Feature Summary
- Delivers high efficiency and precise DC output accuracy for stable power delivery
- Ensures excellent transient response capabilities for dynamic load conditions
- Supports local sensing topology for improved regulation performance
Applications
- Notebook computer CPU core power generation
- I/O power supply creation from high voltage batteries
- Chipset RAM power supply stepping down
Procurement Notes
Verify the specific suffix ZQW against official manufacturer documentation to confirm the exact tape and reel packaging configuration and moisture sensitivity level. Ensure that the ordering information matches the required operating temperature range and pinout specifications for the target PCB layout design before finalizing procurement orders.
Selection Notes
Select this component when designing systems requiring a single-phase synchronous buck solution with local sensing capabilities. It is suitable for applications needing fast transient response and high efficiency during battery-powered operation in portable computing devices where space constraints favor compact surface mount packages.
Part Context
This part belongs to the RT8240A/B/C series of PWM controllers manufactured by Richtek Technology Corporation. These controllers are specifically engineered for notebook computer power architectures, focusing on efficient voltage conversion from battery sources to low-voltage digital logic requirements.
Replacement Considerations
Consult official datasheets to verify if RT8240A or RT8240C variants offer compatible pinouts and electrical characteristics for direct substitution without circuit redesign.
