LT3991EDD#PBF

$6.63

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

SKU:b023750d0486 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#PBF

Overview

The LT3991EDD#PBF is a synchronous step-down switching regulator manufactured by Analog Devices Inc. It operates with an input voltage range of 4.3V to 55V and delivers up to 1.2A of output current. The device features a fixed 2MHz switching frequency and supports adjustable output voltages from 1.19V to 30V. Packaged in a 10-lead WDFN exposed pad, it functions within a junction temperature range of -40°C to 125°C.

Feature Summary

Synchronous buck topology for high efficiency
Wide 4.3V to 55V input voltage capability
Integrated 1.2A power switch
Fixed 2MHz switching frequency

Applications

Industrial point-of-load regulation
Automotive electronics power systems
Battery-powered equipment supply chains
General-purpose DC-DC conversion stages

Procurement Notes

Verify the specific suffix designation against official manufacturer documentation to confirm package type and thermal characteristics. Ensure compatibility with required input voltage ranges and load current demands before integration. Cross-reference datasheet specifications for operating temperature limits and switching frequency stability under varying line conditions.

Selection Notes

Select this component when a wide input voltage range up to 55V is required alongside moderate output current capabilities. The fixed 2MHz frequency allows for smaller passive components compared to lower-frequency alternatives. Consider the WDFN package for space-constrained designs requiring efficient thermal dissipation through the exposed pad.

Part Context

This part belongs to the LT3991 family of synchronous buck regulators designed for high-voltage applications. It integrates a power switch and control circuitry into a compact footprint. The series targets applications requiring robust performance across wide input variations and demanding thermal environments.