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Product Detailed Parameters
- Description：IC REG BUCK ADJ 750MA 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)：4.2V
- Voltage - Input (Max)：42V
- Voltage - Output (Min/Fixed)：1.21V
- Voltage - Output (Max)：24V
- Current - Output：750mA
- Frequency - Switching：195kHz ~ 2.15MHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：10-WFDFN Exposed Pad
- Supplier Device Package：10-DFN (3x3)
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Overview
The LT3973HDD#PBF is a monolithic buck switching regulator manufactured by Analog Devices Inc. It accepts an input voltage range of 4.2V to 42V and delivers up to 750mA output current. The device features adjustable switching frequencies from 195kHz to 2.15MHz, enabling optimization for efficiency or size. It offers an adjustable output voltage between 1.21V and 24V with a low quiescent current of 2.5µA. Operating in temperatures from -40°C to +150°C, it utilizes a 10-DFN package with exposed pad.
Feature Summary
- Adjustable switching frequency allows trade-off between component size and efficiency
- Wide input voltage range supports various power supply architectures
- Low quiescent current enhances battery life in portable applications
- Integrated synchronous rectification improves conversion efficiency
Applications
- Industrial control systems requiring wide input voltage tolerance
- Portable instrumentation powered by single-cell lithium batteries
- Automotive electronics operating under varying line conditions
- Embedded systems needing compact DC-DC step-down solutions
Procurement Notes
Verify the specific suffix (e.g., H, I, M) matches your thermal and electrical requirements. Confirm RoHS compliance status through official documentation. Check availability as some variants may have limited stock. Ensure the DFN-10 package footprint aligns with your PCB design. Validate operating temperature range against your environmental specifications.
Selection Notes
Choose this regulator when wide input voltage and low static current are critical. The adjustable frequency feature permits customization for specific EMI or size constraints. Consider the thermal performance of the DFN-10 package for high-current applications. Compare with other LT3973 variants if higher current or different packaging is needed. Verify that the 750mA limit suits your load requirements.
Part Context
This component belongs to the LT3973 family of high-efficiency buck regulators. It shares core architecture with other LT3973 variants but differs in thermal grade and package options. The series is designed for applications demanding small solution size and low standby power. Analog Devices integrates precision reference and error amplifier for stable regulation.
Replacement Considerations
LT3973IDD#PBF: Similar function with potentially different thermal characteristics. LT3973MDD#PBF: Higher temperature grade variant. Direct pin-compatible alternatives within the same family should be verified for exact electrical parameter matching before substitution.
