LT3508IUF#PBF

$8.32

Description：IC REG BUCK ADJ 1.4A DL 24QFN
Series：-
Mfr：Analog Devices Inc.
Package：Tube

SKU:b98d67de2b81 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 1.4A DL 24QFN
Series：-
Mfr：Analog Devices Inc.
Package：Tube
Function：Step-Down
Output Configuration：Positive
Topology：Buck
Output Type：Adjustable
Number of Outputs：2
Voltage - Input (Min)：3.7V
Voltage - Input (Max)：36V
Voltage - Output (Min/Fixed)：0.8V
Voltage - Output (Max)：35.28V
Current - Output：1.4A
Frequency - Switching：920kHz ~ 1.06MHz
Synchronous Rectifier：No
Operating Temperature：-40°C ~ 125°C (TJ)
Mounting Type：Surface Mount
Package / Case：24-WFQFN Exposed Pad
Supplier Device Package：24-QFN (4x4)

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LT3508IUF#PBF

Overview

The LT3508IUF#PBF is a dual-channel step-down switching regulator manufactured by Analog Devices Inc. It operates with an input voltage range of 3.7 V to 36 V and provides two adjustable outputs, each capable of delivering up to 1.4 A. The device utilizes a fixed 2.5 MHz switching frequency to minimize external component size. It features a quiescent current of 4.3 mA and supports operation within a temperature range of -40°C to +125°C. The component is housed in a 24-lead QFN package designed for surface mount applications.

Feature Summary

Dual independent buck converters integrated into a single monolithic package
Wide input voltage capability supporting various power source configurations
High-frequency switching architecture for compact passive component selection

Applications

Industrial control systems requiring multiple regulated voltage rails
Automotive electronics operating from battery or alternator sources
Portable instrumentation powered by single-cell lithium batteries

Procurement Notes

Verify the specific suffix and tape-and-reel versus tube packaging requirements against the official datasheet before ordering. Confirm that the intended application environment remains within the specified thermal limits. Ensure compatibility with the required output voltage settings using external resistor networks as defined in the reference design documentation.

Selection Notes

Select this component when a dual-output solution is required from a high-voltage input source. The fixed 2.5 MHz frequency allows for smaller inductors compared to lower-frequency alternatives. Consider the thermal performance of the QFN package and ensure adequate PCB copper area for heat dissipation during high-load operations.

Part Context

This part belongs to the LT3508 family of dual synchronous buck regulators. It shares architectural similarities with other members like the LT3506 and LT3508EFE but differs in package type and specific electrical characteristics. The IUF variant specifically denotes the industrial temperature range and QFN footprint configuration.