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Product Detailed Parameters
- Description：IC REG BUCK ADJ 3.5A 10DFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：3.6V
- Voltage - Input (Max)：33V
- Voltage - Output (Min/Fixed)：0.79V
- Voltage - Output (Max)：30V
- Current - Output：3.5A
- Frequency - Switching：230kHz ~ 2.45MHz
- 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)
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Overview
The LT3972EDD#TRPBF is a monolithic buck switching regulator manufactured by Analog Devices Inc. It operates with an input voltage range of 3.6 V to 33 V and delivers up to 3.5 A of output current. The device features an adjustable switching frequency from 200 kHz to 2.4 MHz, enabling optimization for efficiency or component size. Quiescent current is specified at 75 µA during operation and drops to 30 µA in shutdown mode. The output voltage is adjustable from 790 mV to 30 V. It utilizes a 10-lead DFN package and supports operation across a temperature range of -40°C to +125°C.
Feature Summary
- Integrates high-side and low-side power switches for efficient step-down conversion without requiring external Schottky diodes.
- Features a wide input voltage range capable of handling transient spikes up to 38 V.
- Includes programmable soft-start to limit inrush current during startup.
- Supports cycle-by-cycle current limiting and thermal shutdown for robust protection.
Applications
- Industrial control systems
- Automotive electronics
- Point-of-load regulation
Procurement Notes
Verify the specific suffix TRPBF indicates tape-and-reel packaging when sourcing. Confirm RoHS compliance status through official documentation. Check for obsolescence notices or lifecycle changes directly from Analog Devices. Ensure the ordering part number matches the exact electrical specifications required for the design.
Selection Notes
Select this component for applications requiring high input voltages up to 33 V and significant output current. Consider the adjustable frequency feature to optimize external inductor and capacitor sizes. Evaluate thermal performance requirements based on the DFN package and expected load conditions. Compare against other regulators if lower quiescent current or different input ranges are needed.
Part Context
This part belongs to the LT3972 family of high-voltage synchronous buck converters. It shares architectural similarities with other members like the LT3973 but differs in maximum input voltage and current capabilities. The EDD suffix denotes the specific 10-lead DFN package variant designed for surface-mount assembly.
Replacement Considerations
LT3972IDD#PBF is a pin-compatible alternative in tube packaging. LT3973 series devices offer similar functionality but may differ in input voltage limits and current ratings. Verify electrical parameters and thermal characteristics before substitution.
