LT3959IFE

Description：IC REG BOOST CUK ADJ 6A 38TSSOP
Series：-
Mfr：Analog Devices Inc.
Package：Tube

SKU:6aab263e890b Category: Voltage Regulators - DC DC Switching Regulators Brand: Analog Devices Inc.

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Product introduction

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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LT3959IFE

Overview

The LT3959IFE is a wide input range, current mode DC/DC controller designed for boost, SEPIC, and negative output converter applications. It features an internal low-side N-channel power MOSFET rated at 6A and 40V. The device operates with an input voltage range of 1.6V to 40V and supports a programmable switching frequency from 100kHz to 1MHz via an external resistor or synchronization to an external clock. It utilizes a single feedback pin to regulate positive or negative outputs and includes features such as programmable soft start, true current mode control, and output overvoltage/overcurrent protection.

Feature Summary

Supports boost, SEPIC, and inverting topologies with a single feedback pin for positive or negative output regulation
Integrates a 6A/40V internal low-side power switch driven by VIN or DRIVE
Enables ceramic capacitor-only designs for reduced solution size
Includes programmable soft start and hysteresis-based input undervoltage lockout

Applications

Industrial power supplies
Automotive electronics
Medical equipment
Telecommunications systems

Procurement Notes

Verify the specific suffix against official Analog Devices documentation to confirm package type and temperature grade. Ensure the ordering part number matches the required thermal performance and lead configuration. Cross-reference datasheet revisions to validate electrical characteristics before finalizing procurement specifications.

Selection Notes

Select this component when designing boost, SEPIC, or inverting converters requiring a wide input voltage range up to 40V. The integrated 6A switch eliminates the need for external power transistors. Consider the 100kHz to 1MHz frequency range for optimizing passive component sizes. Verify compatibility with ceramic output capacitors for minimal footprint requirements.

Part Context

The LT3959 belongs to Analog Devices' family of wide input voltage range DC/DC controllers. It shares architectural similarities with other high-voltage controllers but is specifically optimized for non-isolated conversion topologies. The device integrates error amplifiers and reference voltages to handle both positive and negative output configurations through a unified feedback interface.