LT3991EMSE#TRPBF is out of stock and can be placed on backorder.
Available Substitutes:

Direct


Analog Devices Inc.
In Stock: 0
Unit Price: $9.75000
Datasheet

Direct


Analog Devices Inc.
In Stock: 0
Unit Price: $6.03732
Datasheet

Parametric Equivalent


Analog Devices Inc.
In Stock: 0
Unit Price: $10.53000
Datasheet
Buck Switching Regulator IC Positive Adjustable 1.19V 1 Output 1.2A 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
Image shown is a representation only. Exact specifications should be obtained from the product data sheet.
Buck Switching Regulator IC Positive Adjustable 1.19V 1 Output 1.2A 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
10 MSOP EP Pad View
Introducing Power by Linear

LT3991EMSE#TRPBF

DigiKey Part Number
LT3991EMSE#TRPBFTR-ND - Tape & Reel (TR)
LT3991EMSE#TRPBFCT-ND - Cut Tape (CT)
LT3991EMSE#TRPBFDKR-ND - Digi-Reel®
Manufacturer
Manufacturer Product Number
LT3991EMSE#TRPBF
Description
IC REG BUCK ADJ 1.2A 10MSOP
Manufacturer Standard Lead Time
10 Weeks
Customer Reference
Detailed Description
Buck Switching Regulator IC Positive Adjustable 1.19V 1 Output 1.2A 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
Datasheet
 Datasheet
EDA/CAD Models
LT3991EMSE#TRPBF Models
Product Attributes
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Category
Voltage - Output (Min/Fixed)
Mfr
Voltage - Output (Max)
30V
Packaging
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Current - Output
Part Status
Active
Frequency - Switching
200kHz ~ 2MHz
Function
Step-Down
Synchronous Rectifier
No
Output Configuration
Positive
Operating Temperature
-40°C ~ 125°C (TJ)
Topology
Mounting Type
Surface Mount
Output Type
Package / Case
Number of Outputs
1
Supplier Device Package
10-MSOP-EP
Voltage - Input (Min)
4.3V
Base Product Number
Voltage - Input (Max)
55V
Associated Products
Environmental & Export Classifications
Product Questions and Answers
Additional Resources
Substitutes (3)
Part NumberManufacturerQuantity AvailableDigiKey Part NumberUnit PriceSubstitute Type
LT3991EDD#TRPBFAnalog Devices Inc.0LT3991EDD#TRPBFTR-ND$9.75000Direct
LT3991IDD#TRPBFAnalog Devices Inc.0505-LT3991IDD#TRPBFTR-ND$6.03732Direct
LT3991IMSE#TRPBFAnalog Devices Inc.0161-LT3991IMSE#TRPBFTR-ND$10.53000Parametric Equivalent
In-Stock: 0
1,385 estimated in stock on 01-Feb-2027
Request Stock Notification
All prices are in USD
Cut Tape (CT) & Digi-Reel®
QuantityUnit PriceExt Price
1$9.75000$9.75
10$6.60700$66.07
25$5.78800$144.70
100$4.86280$486.28
250$4.42500$1,106.25
* All Digi-Reel orders will add a $7.00 reeling fee.
Tape & Reel (TR)
QuantityUnit PriceExt Price
2,500$4.42500$11,062.50
Tariff Status: Tariff may apply if shipping to the United States. Estimated tariff costs will be calculated and displayed in the shopping cart to help you assess potential expenses.