LT3690EUFE#PBF

$12.15

Description：IC REG BUCK ADJ 4A 26QFN
Series：-
Mfr：Analog Devices Inc.
Package：Tube

SKU:b5bd77391b2d Category: Voltage Regulators - DC DC Switching Regulators Brand: Analog Devices Inc.

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Product introduction

Product Detailed Parameters

Description：IC REG BUCK ADJ 4A 26QFN
Series：-
Mfr：Analog Devices Inc.
Package：Tube
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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LT3690EUFE#PBF

Overview

The LT3690EUFE#PBF is an automotive-grade, adjustable frequency monolithic buck switching regulator manufactured by Analog Devices. It accepts input voltages from 3.9V to 36V and provides a single adjustable output voltage ranging from 800mV to 20V with a maximum output current of 4A. The device operates at a switching frequency up to 1.5MHz and features a typical quiescent current of 70µA. It utilizes a synchronous step-down topology with integrated high-efficiency power switches (90mΩ boost switch and 30mΩ synchronous switch) to eliminate the need for an external catch diode. The component is housed in a 26-pin QFN-EP package and supports operation temperatures from -40°C to +150°C.

Feature Summary

Integrated synchronous power switches enhance efficiency and remove the requirement for an external Schottky catch diode.
Adjustable switching frequency allows optimization for specific design requirements regarding size and performance.
Automotive temperature grade ensures reliable operation in harsh thermal environments.

Applications

Automotive always-on systems
Battery-operated digital devices
Distributed DC power systems

Procurement Notes

Verify the specific suffix against official documentation to confirm automotive qualification status. Confirm package type and pinout compatibility during integration. Check manufacturer datasheets for latest revisions and compliance details. Ensure supply chain sources are authorized to guarantee part authenticity.

Selection Notes

Select this component when designing systems requiring high input voltage tolerance up to 36V and significant output current capability. The low quiescent current makes it suitable for battery-powered applications where standby power consumption is critical. Consider the adjustable frequency feature to minimize passive component sizes while maintaining desired ripple specifications.

Part Context

This part belongs to the LT3690 series of synchronous step-down regulators designed for high-efficiency power conversion. It integrates the necessary control logic, oscillators, and power stages into a compact form factor. The series targets applications demanding robust performance across wide input voltage ranges and varying load conditions.