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LT3991EMSE#PBF The LT3991EMSE#PBF is an adjustable step-down switching regulator from Analog Devices. It features a wide input voltage range and high output current capability.
Mfr Part #:

LT3991EMSE#PBF

Available from 1 distributors
Mfr Name: Analog Devices / Maxim Integrated
Analog Devices / Maxim Integrated
The LT3991EMSE#PBF is an adjustable step-down switching regulator from Analog Devices. It features a wide input voltage range and high output current capability.
✓ Total Stock: 2,333 pcs
$ Price Range: $1.08

LT3991EMSE#PBF Available from 1 distributor

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✓ Non-Authorised
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Components Technology Group, Inc. ✓
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2,333 pcs
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2333 pcs On Request 1 On Request On Request On Request On Request On Request
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LT3991EMSE#PBF Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Current
Frequency
Function
Mounting Type
Number of Outputs
Operating Temperature
Output Configuration
Output Type
Supplier Device Package
Supplier Package
Synchronous Rectifier
Topology
Voltage
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LT3991EMSE#PBF Description

Short technical summary and product information.

The LT3991EMSE#PBF is a monolithic buck switching regulator from Analog Devices, designed for efficient power conversion. It accepts a wide input voltage range from 4.3V to 55V and can deliver up to 1.2A of output current.

 

This regulator operates with adjustable switching frequencies from 200kHz to 2MHz, offering flexibility in design. It features ultralow quiescent current of 2.8µA when regulating, and a low shutdown current of 700nA, making it suitable for power-sensitive applications. The device includes a power good flag and soft-start capability for controlled power-up sequences.

 

Available in a 10-MSOP-EP package, the LT3991EMSE#PBF is designed for surface mounting. Its thermally enhanced package with an exposed pad facilitates low thermal resistance, crucial for managing heat during operation. The adjustable output voltage capability allows for precise voltage regulation tailored to specific application needs.

LT3991EMSE#PBF Quick Information

Product Type: DC DC Switching Regulator
Canonical Name: LT3991EMSE#PBF Adjustable Step-Down Switching Regulator
Subcategory: Buck Converter

LT3991EMSE#PBF Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

LT3991EMSE#PBF Estimated Pricing

Qty Low High
1+ $1.08 $1.08

Estimated market price range - modelled values for guidance only, not live distributor offers.

LT3991EMSE#PBF Features

  • Adjustable step-down switching regulator.
  • Wide 4.3V to 55V input voltage range.
  • 1.2A maximum output current.
  • Low quiescent current of 2.8µA.
  • 10-MSOP-EP package for surface mounting.

LT3991EMSE#PBF Applications

  • Suitable for high voltage battery-powered systems.
  • Ideal for industrial and automotive power supplies.
  • Used in distributed power architectures.
  • Applicable for portable and battery-operated devices.

LT3991EMSE#PBF FAQs

7 frequently asked questions generated from this part’s specifications.
What is the input voltage range of the LT3991EMSE#PBF?

The input voltage range is 4.3V to 55V.

What is the output current capability?

The maximum output current is 1.2A.

What is the output voltage range?

The adjustable output voltage range is 1.19V to 30V.

What is the operating temperature range?

The operating junction temperature range is -40°C to 125°C.

What package is the LT3991EMSE#PBF available in?

It is available in a 10-TFSOP or 10-MSOP package with exposed pad (0.118", 3.00mm Width).

What is the switching frequency range?

The switching frequency is programmable from 200kHz to 2MHz.

What is the quiescent current?

The typical quiescent current is 2.8µA when regulating 12VIN to 3.3VOUT.

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