ChipApex | Global Electronic Components Supplier
SEARCH
Search Product
Search Post
— IC芯片 | 连接器 | 传感器 | 被动器件 —
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 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)：38V
- 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)
Download product information
Overview
The LT3971EDD#PBF is a synchronous step-down switching regulator manufactured by Analog Devices Inc. It operates with an input voltage range of 4.3V to 38V and provides a fixed 3.3V output at up to 1.2A. The device features a 2MHz adjustable switching frequency and ultra-low quiescent current of 2.8µA during regulation, dropping to 1.7µA in shutdown mode. Packaged in a 10-lead DFN with an exposed pad, it supports operation from -40°C to +125°C.
Feature Summary
- Integrates a high-efficiency synchronous buck topology with a low on-resistance internal switch for improved thermal performance.
- Features Burst Mode operation to maintain high efficiency at light loads while minimizing output voltage ripple.
- Includes precise enable threshold control and power good flag signaling for robust system management.
Applications
- Point-of-load regulation for industrial equipment requiring wide input voltage ranges
- Power supply stages for automotive electronics operating within specified temperature limits
- Battery-powered systems utilizing low quiescent current for extended operational life
Procurement Notes
Verify the specific suffix #PBF indicates lead-free compliance and tube packaging when sourcing. Confirm the EDD package variant matches your PCB footprint requirements. Check manufacturer documentation for any recent material or marking changes that may affect assembly processes. Ensure compatibility with your design's thermal dissipation strategy given the DFN form factor.
Selection Notes
Select this component when a fixed 3.3V output is required alongside high input voltage tolerance up to 38V. The 1.2A current rating suits moderate load applications where space constraints favor the compact DFN package. Consider the 2MHz switching frequency for smaller external passive components compared to lower-frequency alternatives.
Part Context
This part belongs to the LT3971 family of monolithic buck regulators designed for high efficiency and low noise. It shares architectural similarities with other members like the LT3971A but offers specific electrical characteristics tailored for general-purpose DC-DC conversion. The DDFN package provides a balance between thermal performance and board space efficiency.
Replacement Considerations
Direct substitutes include LT3971EDD-3.3#PBF which offers identical pinout and specifications. Verify functional equivalence with LT3971EMSE-3.3#PBF if MSOP packaging is acceptable for the design.
