ChipApex | Global Electronic Components Supplier
RT8237AZQW
Search Product
Search Post
— IC芯片 | 连接器 | 传感器 | 被动器件 —
Consult the customer manager about the wholesale price.
consultation hotline：86-132-6715-2157
email：[email protected]
Contact the product manager for consultation. One-stop consultation is available.
Do you want a lower wholesale price? Please send us your inquiry and we will reply immediately.
Product Detailed Parameters
- Description：IC REG CTRLR BUCK 10WDFN
- 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：290kHz ~ 430kHz
- 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：10-WFDFN Exposed Pad
- Supplier Device Package：10-WDFN (3x3)
- Grade：-
- Qualification：-
Download product information
Overview
The RT8237AZQW is a single synchronous buck PWM controller manufactured by Richtek USA Inc. It operates with a supply voltage range of 4.5V to 5.5V and supports an input voltage range of 2.7V to 26V. The device provides a positive output configuration adjustable from 0.7V to 3.3V via resistor setting, maintaining a DC accuracy of +/- 0.5%. The switching frequency is selectable between 290kHz and 430kHz. It utilizes a constant on-time control scheme and is housed in a 10-WDFN (3x3) package with a bare pad.
Feature Summary
- Employs a constant on-time PWM control scheme for wide input/output voltage ratios and fast transient response.
- Eliminates the need for external current sense resistors to reduce cost and enhance efficiency.
- Capable of driving large synchronous rectifier MOSFETs and entering diode emulation mode at light loads.
- Includes built-in bootstrap switch and cycle-by-cycle current limit protection.
Applications
- CPU core supplies in notebook computers
- Chipset and DRAM power supplies
- Low voltage generic DC-DC power regulators
Procurement Notes
Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS3 compliance and MSL level 3 handling requirements during storage and assembly. Check datasheet revisions for any pinout or electrical parameter updates prior to final design implementation.
Selection Notes
Select this controller for designs requiring high efficiency without external current sensing components. Ensure the application benefits from the constant on-time topology's ability to handle wide voltage ratios. Verify that the required switching frequency falls within the 290kHz to 430kHz range and that the 10-WDFN package fits the PCB layout constraints.
Part Context
This component belongs to the RT8237 family of high-efficiency synchronous buck controllers. It is designed specifically for stepping down high voltage batteries to low voltage CPU and chipset supplies. The AZ suffix typically denotes specific packaging or environmental compliance variations within the standard RT8237E product line.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult official cross-reference lists or contact the manufacturer directly for verified alternatives.
