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Product Detailed Parameters
- Description：IC REG BUCK ADJ 4A 26QFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：3.9V
- Voltage - Input (Max)：36V
- Voltage - Output (Min/Fixed)：0.8V
- Voltage - Output (Max)：20V
- Current - Output：4A
- Frequency - Switching：138kHz ~ 1.5MHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：26-WFQFN Exposed Pad
- Supplier Device Package：26-QFN (4x6)
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Overview
The LT3690IUFE#TRPBF is an automotive-grade, adjustable frequency monolithic synchronous step-down switching regulator manufactured by Analog Devices. It accepts input voltages from 3.9V to 36V and delivers up to 4A of output current with an adjustable output voltage range of 800mV to 20V. The device features a typical quiescent current of 70µA and operates at a switching frequency up to 1.5MHz. It utilizes a QFN-26 package and supports an operating temperature range from -40°C to +150°C.
Feature Summary
- Integrated high-efficiency synchronous power switches eliminate the need for external catch diodes.
- Adjustable switching frequency allows optimization for size and efficiency.
- Automotive qualification ensures reliability in harsh environments.
Applications
- Automotive infotainment systems
- Telematics control units
- Body electronics modules
Procurement Notes
Verify the specific suffix #TRPBF indicates tape-and-reel packaging when sourcing. Confirm the 'I' grade designation matches required industrial or extended temperature specifications. Ensure compatibility with automotive quality standards if deployed in vehicle systems. Cross-reference datasheet revisions for any pinout or electrical parameter updates before finalizing procurement.
Selection Notes
Select this component for designs requiring high input voltage tolerance up to 36V and significant load currents up to 4A. The low quiescent current makes it suitable for battery-powered applications where standby power consumption is critical. The adjustable frequency feature provides flexibility in managing electromagnetic interference and passive component sizing compared to fixed-frequency alternatives.
Part Context
This part belongs to the LT3690 family of synchronous buck regulators designed for demanding power management tasks. It shares architectural similarities with other high-voltage buck converters but is distinguished by its automotive-grade qualification and specific thermal performance characteristics within the QFN-26 footprint.
Replacement Considerations
LT3690HUFE#PBF is a tube-packaged equivalent with identical electrical specifications. Verify that the change in packaging format aligns with automated assembly requirements without affecting circuit functionality.
