LT3580

PRODUCTION

Boost/Inverting DC/DC Converter with 2A Switch, Soft-Start, and Synchronization

Analog Devices LT3580 Product Info

10 February 2026 8

Features

2A Internal Power Switch
Adjustable Switching Frequency
Single Feedback Resistor Sets V_OUT
Synchronizable to External Clock
High Gain SHDN Pin Accepts Slowly Varying Input Signals
Wide Input Voltage Range: 2.5V to 32V

Low V_CESAT Switch: 300mV at 1.5A (Typical)
Integrated Soft-Start Function
Easily Configurable as a Boost or Inverting Converter
User Configurable Undervoltage Lockout (UVLO)
Tiny 8-Lead 3mm × 3mm DFN and 8-Lead MSOP Packages

Part details & applications

The LT3580 is a PWM DC/DC converter containing an internal 2A, 42V switch. The LT3580 can be configured as either a boost, SEPIC or inverting converter. Capable of generating 12V at 550mA or –12V at 350mA from a 5V input, the LT3580 is ideal for many local power supply designs.

The LT3580 has an adjustable oscillator, set by a resistor from the RT pin to ground. Additionally, the LT3580 can be synchronized to an external clock. The free running or synchronized switching frequency range of the part can be set between 200kHz and 2.5MHz.

The LT3580 also features innovative SHDN pin circuitry that allows for slowly varying input signals and an adjustable undervoltage lockout function.

Additional features such as frequency foldback and soft-start are integrated. The LT3580 is available in tiny 3mm × 3mm 8-lead DFN and 8-lead MSOP packages.

Applications

VFD Bias Supplies
TFT-LCD Bias Supplies
GPS Receivers
DSL Modems
Local Power Supply

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