LT3991IDD

Description：IC REG BUCK ADJ 1.2A 10DFN
Series：-
Mfr：Analog Devices Inc.
Package：Tube

SKU:6a6633c465c7 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 1.2A 10DFN
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)：4.3V
Voltage - Input (Max)：55V
Voltage - Output (Min/Fixed)：1.19V
Voltage - Output (Max)：30V
Current - Output：1.2A
Frequency - Switching：200kHz ~ 2MHz
Synchronous Rectifier：No
Operating Temperature：-40°C ~ 125°C (TJ)
Mounting Type：Surface Mount
Package / Case：10-WFDFN Exposed Pad
Supplier Device Package：10-DFN (3x3)
Grade：-
Qualification：-

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LT3991IDD

Overview

The LT3991IDD#PBF is a monolithic buck switching regulator manufactured by Analog Devices Inc. It accepts an input voltage range from 4.3V to 55V and provides a single adjustable positive output ranging from 1.19V to 30V. The device delivers up to 1.2A of output current with a switchable frequency between 200kHz and 2MHz. It operates within a junction temperature range of -40°C to 125°C and utilizes a 10-WFDFN package with an exposed pad.

Feature Summary

Adjustable switching frequency allows optimization for efficiency or component size
Wide input voltage range supports various supply configurations
Integrated synchronous rectification for high efficiency

Applications

Industrial point-of-load regulation
Automotive electronics power distribution
Telecommunications infrastructure supplies

Procurement Notes

Verify the complete part number including suffixes such as #PBF for lead-free compliance when ordering. Confirm package type and thermal requirements match the design specifications. Ensure compatibility with the intended input voltage range and load current demands before procurement.

Selection Notes

Select this component for applications requiring a wide input voltage range and adjustable output voltage. Consider the thermal performance of the 10-WFDFN package for heat dissipation needs. Evaluate the required switching frequency against inductor size constraints and electromagnetic interference requirements.

Part Context

This part belongs to the LT3991 family of high voltage buck regulators. It shares functional similarities with other members like the LT3990 but offers specific electrical characteristics tailored for broader input voltage applications. The IDD suffix indicates the industrial temperature grade and DFN package style.

Replacement Considerations

Check for direct pin-compatible alternatives within the Analog Devices portfolio that match the 55V input and 1.2A output specifications. Verify thermal resistance and package dimensions if substituting with similar devices from other manufacturers.

How to buy

Online and offline orders are supported. If the item is available for online purchase, you can place it in the cart; for wholesale pricing, please contact our product manager for a quote.

Payment Method

Payment methods: T/T, WeChat Pay, credit cards, Google Pay, Apple Pay . Buyer covers shipping, fees, duties, and taxes; contact our product manager if you need a contract/procurement process.

Delivery time

In-stock items usually ship within 24 hours. Otherwise, shipment is arranged 1 to 2 days after the items arrive at our warehouse. Timing depends on destination and shipping method.

Freight calculation

Freight cost depends on destination, package size, and weight . We offer shipping options via DHL, FedEx, UPS, and TNT , and can ship using your freight account upon request.

Mode of Transportation

We ship via DHL, FedEx, UPS, and TNT. If you prefer a specific logistics provider, we can ship using your designated carrier.

Return and Refund

Returns are accepted within 60 days of invoice with RMA approval. Items must be resalable; original invoice and test report are required. No returns for customer errors.