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Product Detailed Parameters
- Description：IC REG BUCK ADJ 2A 24QFN
- 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)：3.4V
- Voltage - Input (Max)：65V
- Voltage - Output (Min/Fixed)：0.97V
- Voltage - Output (Max)：64.75V
- Current - Output：2A
- Frequency - Switching：200kHz ~ 2.2MHz
- Synchronous Rectifier：Yes
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：24-WFQFN Exposed Pad
- Supplier Device Package：24-QFN (3x5)
- Grade：-
- Qualification：-
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Overview
The LT8620IUDD is a synchronous step-down switching regulator from Analog Devices, housed in a 24-lead 3 mm x 5 mm QFN package. It accepts an input voltage range of 3.4 V to 65 V and delivers up to 2 A of continuous output current with an adjustable output voltage between 970 mV and 64.75 V. The device operates at switch frequencies from 200 kHz to 2.2 MHz and features a quiescent current of 2.5 µA in Burst Mode operation. It functions within a temperature range of -40°C to +150°C.
Feature Summary
- Integrates high-efficiency top and bottom power switches with all necessary control circuitry on a single monolithic chip.
- Utilizes Burst Mode operation to maintain ultra-low quiescent current for extended battery life in always-on systems.
- Features a fast 30 ns minimum on-time enabling high-frequency switching while avoiding noise-sensitive bands.
Applications
- Automotive single-battery and dual-battery systems
- Industrial applications requiring wide input voltage ranges
- GSM power supplies
Procurement Notes
Verify the specific suffix 'IUDD' against official Analog Devices documentation to confirm it denotes the industrial temperature grade variant in the 24-lead QFN package. Ensure compatibility with the DC1992A development kit if evaluation is required. Confirm RoHS compliance status through the manufacturer's datasheet before procurement.
Selection Notes
Select this component for designs requiring a 65 V input rating and 2 A output capability in a compact footprint. The low 2.5 µA quiescent current makes it suitable for battery-powered applications where standby power consumption is critical. The adjustable frequency allows optimization for efficiency or EMI performance.
Part Context
This part belongs to the LT8620 series of synchronous buck regulators designed for automotive and industrial environments. The series is characterized by its ability to operate efficiently across a wide input voltage range while maintaining small external component sizes due to high switching frequencies.
Replacement Considerations
Compatible variants include LT8620EMSE#PBF and LT8620HMSE#PBF, which share similar electrical characteristics but differ in package type (MSOP-16) and temperature grade. Verify pinout and thermal requirements when substituting.
