LINEAR TECHNOLOGY LT3580 1 3580fc TYPICAL APPLICATIONS DESCRIPTION Boost, Inverting DC-DC Converter User Manual and Specification Sheet
Summary
Optimize your high-power electronics with these advanced DC/DC converters. This comprehensive manual details the operational specifications of ICs like the LT3580, enabling engineers to design robust power solutions. It covers implementing highly efficient boost, SEPIC, and inverting topologies with key features including soft-start functionality and synchronized outputs. Ideal for hardware designers building complex systems such as DSL modems, local power supplies, and display bias circuits.
Page 1 Text Content
LT3580
Boost/Inverting DC/DC Converter with 2A Switch, Soft-Start, and Synchronization
FEATURES DESCRIPTION n 2A Internal Power Switch
The LT®3580 is a PWM DC/DC converter containing an
n Adjustable Switching Frequency
internal 2A, 42V switch. The LT3580 can be confi gured
n Single Feedback Resistor Sets VOUT
as either a boost, SEPIC or inverting converter. Capable
n Synchronizable to External Clock
of generating 12V at 550m A or –12V at 350m A from a 5V
n High Gain SHDN Pin Accepts Slowly Varying
input, the LT3580 is ideal for many local power supply
Input Signals designs. n Wide Input Voltage Range: 2.5V to 32V
The LT3580 has an adjustable oscillator, set by a resistor
n Low VCESAT Switch: 300m V at 1.5A (Typical)
from the RT pin to ground. Additionally, the LT3580 can
n Integrated Soft-Start Function
be synchronized to an external clock. The free running or
n Easily Confi gurable as a Boost or Inverting Converter
synchronized switching frequency range of the part can
n User Confi gurable Undervoltage Lockout (UVLO)
be set between 200k Hz and 2.5MHz.
n Tiny 8-Lead 3mm × 3mm DFN and 8-Lead MSOP
Packages The LT3580 also features innovative SHDN pin circuitry
FF IC IE
that allows for slowly varying input signals and an adjust- APPLICATIONS able undervoltage lockout function.
n VFD Bias Supplies Additional features such as frequency foldback and soft- n TFT-LCD Bias Supplies start are integrated. The LT3580 is available in tiny 3mm n GPS Receivers × 3mm 8-lead DFN and 8-lead MSOP packages. n DSL Modems L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
n Local Power Supply
TYPICAL APPLICATION 1.2MHz, 5V to 12V Boost Converter Achieves over 88% Effi ciency Effi ciency and Power Loss
4.2μH VOUT
550m A VIN SW 10μF
SHDN GND LT3580 130k
RT FB
SYNC SS
1n F 3580 TA01
LOAD CURRENT (m A)
3580 TA01b
3580fc
Page Summary Contents For LINEAR TECHNOLOGY LT3580 1 3580fc TYPICAL APPLICATIONS DESCRIPTION Boost, Inverting DC-DC Converter User Manual and Specification Sheet
Manual Details
| Brand | Linear |
|---|---|
| Pages | 28 |
| File Size | 471.35 KB |
| Published | July 22, 2026 |
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Frequently Asked Questions
What types of converters can the LT3580 function as?
It can be configured as a boost, SEPIC, or inverting converter.
What is the operational input voltage range of the device?
The part supports a wide input voltage range spanning from 2.5V to 32V.
How can I control the switching frequency and startup process?
It features an adjustable oscillator, user-configurable UVLO (200kHz–2.5MHz), and integrated soft-start function.
What are the physical packages available for the LT3580?
The device is available in tiny 8-lead 3mm x 3mm DFN or 8-lead MSOP packages.