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Product Detailed Parameters
- Description：IC REG BUCK ADJ 350MA 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)：4.2V
- Voltage - Input (Max)：62V
- Voltage - Output (Min/Fixed)：1.21V
- Voltage - Output (Max)：25V
- Current - Output：350mA
- Frequency - Switching：210kHz ~ 2.3MHz
- 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 LT3990EDD#TRPBF is a monolithic buck switching regulator from Analog Devices Inc., housed in a 10-WFDFN exposed pad package. It accepts an input voltage range of 4.2V to 62V and delivers a maximum output current of 350mA. The adjustable output voltage spans from 1.21V to 25V, with a fixed 3.3V variant available as the LT3990EDD. The device features an adjustable switching frequency between 210kHz and 2.3MHz and consumes only 2.5µA of quiescent current. It operates within a junction temperature range of -40°C to 125°C.
Feature Summary
- Adjustable frequency operation allows optimization for efficiency or component size
- Ultra-low quiescent current minimizes power consumption during standby
- Wide input voltage range supports diverse supply sources up to 62V
- Integrated synchronous rectification improves conversion efficiency
Applications
- Automotive electronics requiring wide input voltage tolerance
- Industrial control systems needing reliable DC-DC conversion
- Battery-powered devices demanding low standby current
- Embedded systems utilizing adjustable output voltages
Procurement Notes
Verify the specific suffix against the manufacturer's official documentation to confirm package type and tape/reel specifications. Ensure the ordering part number matches the required output voltage configuration and thermal performance needs. Cross-reference the datasheet revision history for any updates regarding material declarations or packaging changes before finalizing procurement orders.
Selection Notes
Select this component when a wide input voltage range up to 62V is required alongside low static current consumption. The adjustable frequency feature enables designers to optimize external component sizes. Consider the 10-WFDFN package for space-constrained applications requiring efficient heat dissipation through the exposed pad.
Part Context
This part belongs to the LT3990 family of high-voltage buck regulators. It shares core architectural features with other variants like the LT3990EMSE but differs in package configuration. The EDD suffix specifically denotes the 10-pin DFN package, distinguishing it from MSOP or tube-packaged versions within the same product line.
Replacement Considerations
Direct substitutes include other LT3990 variants such as LT3990EDD#PBF or LT3990EMSE#TRPBF, provided the package and reel requirements align with the design constraints. Verify pin compatibility and thermal characteristics when transitioning between different package styles within the same functional family.
