LT3971IDD-3.3#TRPBF

$3.90

Description：IC REG BUCK 3.3V 1.2A 10DFN
Series：-
Mfr：Analog Devices Inc.
Package：Tape & Reel (TR)

SKU:50f65bf62b0d Category: Voltage Regulators - DC DC Switching Regulators Brand: Analog Devices Inc.

Consult the customer manager about the wholesale price.

consultation hotline：86-132-6715-2157

email：[email protected]
Contact the product manager for consultation. One-stop consultation is available.

Do you want a lower wholesale price? Please send us your inquiry and we will reply immediately.

Product introduction

Product Detailed Parameters

Description：IC REG BUCK 3.3V 1.2A 10DFN
Series：-
Mfr：Analog Devices Inc.
Package：Tape & Reel (TR)
Function：Step-Down
Output Configuration：Positive
Topology：Buck
Output Type：Fixed
Number of Outputs：1
Voltage - Input (Min)：4.3V
Voltage - Input (Max)：38V
Voltage - Output (Min/Fixed)：3.3V
Voltage - Output (Max)：-
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)

Download product information

LT3971IDD-3.3#TRPBF

Overview

The LT3971IDD-3.3#TRPBF is a synchronous step-down switching regulator manufactured by Analog Devices Inc., designed for high-efficiency power conversion in compact applications. It operates with an input voltage range of 4.3 V to 38 V and provides a fixed output voltage of 3.3 V. The device delivers up to 1.2 A of continuous output current while maintaining low quiescent current consumption of 2.8 µA during regulation. It features an adjustable switching frequency from 200 kHz to 2 MHz, allowing optimization for size or efficiency. The component is housed in a 10-lead DFN package suitable for surface-mount technology.

Feature Summary

Integrates a high-efficiency synchronous buck topology with an internal 0.33Ω switch for reduced external component count.
Features Burst Mode operation to maintain high efficiency at light loads while keeping output ripple below 15mV.
Includes an accurate 1V threshold enable pin for precise shutdown control, reducing supply current to 700nA.
Provides a power good flag signal that activates when the output voltage reaches 91% of the programmed level.

Applications

Battery-powered portable electronics requiring wide input voltage tolerance
Industrial systems needing efficient step-down regulation from higher bus voltages
Embedded controllers and microprocessor power supplies with strict transient response requirements

Procurement Notes

Verify the specific suffix #TRPBF indicates tape-and-reel packaging when sourcing. Confirm the manufacturer is Analog Devices Inc. or its subsidiary Linear Technology. Ensure the part number matches the exact fixed 3.3V output variant. Check RoHS compliance status through official documentation. Validate the DFN-10 package type against your PCB footprint requirements before finalizing procurement.

Selection Notes

Select this component when a fixed 3.3V output is required without external feedback resistors. Choose it over adjustable variants if board space is limited and resistor precision is a concern. Consider the 1.2A current limit for loads exceeding typical low-power sensors but below heavy industrial motors. Evaluate the 2.8µA quiescent current against battery life requirements for standby modes. Compare the DFN-10 thermal performance against MSOP packages for similar current needs.

Part Context

This part belongs to the LT3971 family of ultra-low quiescent current buck regulators. It shares architectural similarities with the LT3971A and LT3971-5 but offers specific electrical characteristics tailored for general-purpose 3.3V generation. The family emphasizes small footprint solutions using the 10-lead DFN and MSOP packages. It complements other Analog Devices PMICs by providing a standalone, easy-to-use solution for mid-range current applications.

Replacement Considerations

LT3971IDD-3.3#PBF is the tube-packaged equivalent of this reel-part. LT3971IMSE-3.3#PBF offers the same electrical specifications in an MSOP-10 package instead of DFN-10. LT3971EMSE-3.3#PBF is another MSOP variant within the same series. Verify pinout compatibility and thermal pad connections when substituting between DFN and MSOP 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.