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RT8241AZQW
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Product Detailed Parameters
- Description：IC REG CTRLR BUCK 12WQFN
- 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：300kHz
- 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 RT8241AZQW is a single synchronous buck PWM controller manufactured by Richtek USA Inc. It operates with a fixed switching frequency of 300kHz and accepts an input voltage range of 4.5V to 5.5V. The device provides one positive output configured as a transistor driver, capable of stepping down high voltage batteries for low voltage CPU core, I/O, and chipset RAM supplies. It features on-chip voltage programming between 0.675V and 0.9V via digital inputs.
Feature Summary
- Utilizes constant-on-time PWM control scheme for wide input/output voltage ratios and instant load transient response
- Eliminates external current-sense resistors to reduce cost while maintaining high efficiency
- Supports driving large synchronous rectifier MOSFETs and enters diode emulation mode at light loads
Applications
- Notebook computer CPU core power supplies
- I/O power supply generation
- Chipset RAM voltage regulation
Procurement Notes
Verify the specific suffix AZQW against the manufacturer datasheet to confirm package type and temperature grade. Confirm RoHS compliance status and moisture sensitivity level (MSL) requirements for your assembly process. Ensure the 12-WQFN footprint matches your PCB design constraints before ordering.
Selection Notes
Select this component when designing systems requiring a compact, high-efficiency solution for stepping down battery voltages in portable computing devices. The integrated voltage programming and lack of current-sense resistor make it suitable for cost-sensitive designs needing precise output regulation without complex external compensation networks.
Part Context
This part belongs to the RT8241 family of high-efficiency single synchronous buck PWM controllers from Richtek Technology Corporation. These controllers are designed to provide excellent transient response and high DC output accuracy, addressing the power delivery needs of modern mobile processors and memory subsystems.
Replacement Considerations
Check for pin-compatible alternatives within the same family or newer generations that may offer improved thermal performance or updated packaging options. Verify that any substitute maintains the 300kHz switching frequency and compatible control characteristics.
