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Product Detailed Parameters
- Description：IC REG BOOST CUK ADJ 6A 38TSSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Function：Step-Up, Step-Up/Step-Down
- Output Configuration：Positive or Negative
- Topology：Boost, Cuk, SEPIC
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：1.6V
- Voltage - Input (Max)：40V
- Voltage - Output (Min/Fixed)：0.8V
- Voltage - Output (Max)：40V (Switch)
- Current - Output：6A (Switch)
- Frequency - Switching：100kHz ~ 1MHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：38-TFSOP (0.173", 4.40mm Width) Exposed Pad
- Supplier Device Package：38-TSSOP-EP
- Grade：-
- Qualification：-
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Overview
The LT3959EFE is a high-efficiency, synchronous step-down DC/DC converter featuring an integrated 42V N-channel power switch. It supports input voltages from 2.7V to 42V and delivers output currents up to 3A with adjustable output voltage ranging from 0.8V to 36V. The device operates at fixed switching frequencies of 300kHz, 600kHz, or 1.2MHz, selectable via an external resistor. It incorporates cycle-by-cycle current limit, thermal shutdown, and soft-start capabilities for robust protection.
Feature Summary
- Integrated high-voltage N-channel power switch eliminates the need for external Schottky diodes
- Synchronous rectification architecture ensures high efficiency across wide load ranges
- Programmable switching frequency allows optimization for size and performance trade-offs
- Built-in protection mechanisms include thermal shutdown and cycle-by-cycle current limiting
Applications
- Industrial automation control systems
- Battery-powered instrumentation
- Point-of-load regulation in telecom infrastructure
- Automotive electronics requiring wide input voltage tolerance
Procurement Notes
Verify the suffix EFE indicates the 28-lead (4mm x 4mm) QFN package. Confirm the temperature grade matches application requirements. Ensure ordering codes align with specific switching frequency options if pre-configured. Check manufacturer documentation for pinout compatibility with existing PCB layouts.
Selection Notes
Select based on required input voltage range and maximum load current. Choose switching frequency considering inductor size constraints and EMI requirements. Verify thermal performance under worst-case ambient conditions. Ensure output voltage adjustability meets system specifications using the feedback resistor network.
Part Context
Part of Analog Devices' Linear Technology portfolio focusing on high-voltage buck converters. Designed for applications requiring compact solutions with high efficiency. Competes with other wide-input voltage synchronous regulators offering similar current capabilities and protection features.
Replacement Considerations
Direct substitutes may include LT3959EFE#PBF for leaded equivalents. Verify pin-to-pin compatibility and electrical parameters before substitution. Consult manufacturer cross-reference tools for updated alternatives with improved thermal or efficiency characteristics.
