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 5V 1.2A 10DFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- 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)：5V
- 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)
- Grade：-
- Qualification：-
Download product information
Overview
The LT3971IDD-5#PBF is a monolithic buck switching regulator from Analog Devices, housed in a 10-lead DFN package. It operates with an input voltage range of 4.3V to 38V and provides a fixed 5V 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 standby. It includes internal compensation, soft-start, and power good signaling for stable DC-DC conversion.
Feature Summary
- Ultra-low quiescent current design maintains high efficiency at light loads while keeping output ripple low through Burst Mode operation.
- Internally compensated current mode topology ensures fast transient response and loop stability without external compensation components.
- Integrated high-efficiency switch and boost Schottky diode simplify circuit design and reduce thermal resistance requirements.
Applications
- Battery-powered portable equipment requiring extended runtime
- Industrial control systems with wide input voltage ranges
- Embedded systems needing efficient step-down conversion
Procurement Notes
Verify the exact suffix #PBF for lead-free compliance and tube packaging. Confirm availability status as supply may be limited or subject to factory special orders. Ensure the DFN-10 footprint matches your PCB layout constraints before finalizing procurement.
Selection Notes
Select this part when a fixed 5V output is required with high input voltages up to 38V. Choose over adjustable variants if system design benefits from simplified feedback networks. Consider the 1.2A current limit and 2MHz frequency for balancing component size against dynamic load performance.
Part Context
This component belongs to the LT3971 family of high-voltage buck regulators. It shares architectural similarities with the LT3970 and LT3973 series but offers specific current ratings and fixed output options tailored for general-purpose power management applications in compact form factors.
Replacement Considerations
Check for LT3971A-5#PBF for improved reference accuracy and specified pin currents suitable for USB applications. Verify pinout compatibility between DFN packages before substitution.
