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Product Detailed Parameters
- Description：IC REG BUCK ADJ 3A 16TSSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR)
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：5.5V
- Voltage - Input (Max)：60V
- Voltage - Output (Min/Fixed)：1.219V
- Voltage - Output (Max)：55.2V
- Current - Output：3A (Switch)
- Frequency - Switching：500kHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Supplier Device Package：16-TSSOP-EP
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Overview
The LT3431IFE#TRPBF is a high voltage, synchronous step-down switching regulator from Analog Devices. It accepts input voltages up to 60V and delivers an output current of 3A. The device operates at a fixed switching frequency of 500kHz. The output voltage is adjustable from 1.219V to 55.2V. It features a 0.1Ω internal power switch. The component is housed in a 16-lead TSSOP package with exposed pad (TSSOP-EP). Operating temperature range is -40°C to +125°C junction temperature.
Feature Summary
- Integrates a high-efficiency 3A synchronous rectifier with low on-resistance for improved thermal performance.
- Supports wide input voltage range up to 60V, suitable for industrial and automotive bus systems.
- Fixed 500kHz switching frequency allows for the use of small external passive components.
Applications
- Industrial point-of-load regulation
- Automotive electronics power distribution
- High voltage DC-DC conversion stages
Procurement Notes
Verify the specific suffix #TRPBF indicates tape and reel packaging when ordering. Confirm the manufacturer is Analog Devices Inc. or its predecessor Linear Technology. Ensure the package type matches the required 16-TSSOP-EP footprint for PCB layout compatibility. Check for RoHS compliance status if required by project specifications.
Selection Notes
Select this component when a high input voltage capability up to 60V is required alongside a 3A output current. The 500kHz frequency offers a balance between efficiency and component size compared to lower frequency alternatives. Consider the thermal requirements of the TSSOP-EP package for heat dissipation in enclosed environments.
Part Context
This part belongs to the LT343x family of high voltage buck regulators. It shares architectural similarities with the LT3430 but differs in switching frequency and specific electrical characteristics. The LT3431 series is designed for applications requiring robust performance under high voltage stress conditions.
Replacement Considerations
LT3431IFE#PBF is the tube version of the same functional device. Cross-reference with other 60V, 3A buck regulators from Analog Devices if availability is constrained, ensuring pinout and electrical parameters match.
