LT3991EDD

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

SKU:8162bcdda18d 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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LT3991EDD

Overview

The LT3991EDD is a step-down switching regulator IC manufactured by Analog Devices Inc. It operates with an input voltage range of 4.3V to 55V and provides a single adjustable output from 1.19V to 30V at up to 1.2A. The device features a switch frequency between 200kHz and 2MHz, low quiescent current of 2.8µA, and operates within a junction temperature range of -40°C to 125°C. It is housed in a 10-WFDFN package with an exposed pad.

Feature Summary

High input voltage tolerance up to 55V for wide-range power applications
Ultra-low quiescent current consumption for battery-powered efficiency
Adjustable output voltage with precise regulation capabilities
Integrated shutdown pin for system power management

Applications

Industrial control systems requiring high-voltage input conversion
Battery-operated equipment needing extended runtime
Embedded systems with strict power budget constraints
Automotive electronics operating under variable supply conditions

Procurement Notes

Verify the specific suffix (e.g., #PBF) for lead-free compliance and RoHS status. Confirm package type matches design requirements. Check manufacturer datasheet for latest revision notes. Ensure ordering quantity aligns with standard packaging formats. Validate component authenticity through authorized channels.

Selection Notes

Select based on required input voltage range and maximum load current. Consider thermal performance given the DFN package. Evaluate switching frequency needs against external component size constraints. Verify compatibility with system shutdown logic. Assess cost-effectiveness relative to alternative regulators in the same family.

Part Context

Part of the LT3991 family of high-voltage buck regulators. Designed for applications demanding high efficiency and low standby power. Competes with other high-voltage synchronous buck converters. Offers integrated protection features typical of Analog Devices PMIC solutions.

Replacement Considerations

LT3991IDD#PBF offers similar specifications in a different package variant. LT3991IMSE-5#PBF provides fixed output options in MSOP-10. Verify pinout compatibility before substitution. Check thermal resistance differences between packages.

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.