LTC3809-1
Info: : PRODUCTION
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LTC3809-1

No RSENSE, Low Input Voltage, Synchronous DC/DC Controller with Output Tracking

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 8
1ku List Price Starting From $3.02
Features
  • Programmable Output Voltage Tracking
  • No Current Sense Resistor Required
  • Constant Frequency Current Mode Operation for Excellent Line and Load Transient Response
  • Wide VIN Range: 2.75V to 9.8V
  • Wide VOUT Range: 0.6V to VIN
  • 0.6V ±1.5% Reference
  • Low Dropout Operation: 100% Duty Cycle
  • Selectable Burst Mode®/Pulse-Skipping/Forced Continuous Operation
  • Auxiliary Winding Regulation
  • Internal Soft-Start Circuitry
  • Selectable Maximum Peak Current Sense Threshold
  • Output Overvoltage Protection
  • Micropower Shutdown: IQ = 9µA
  • Tiny Thermally Enhanced Leadless (3mm × 3mm) DFN or 10-lead MSOP Packages
Additional Details
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The LTC3809-1 is a synchronous step-down switching regulator controller that drives external complementary power MOSFETs using few external components. The constant frequency current mode architecture with MOSFET VDS sensing eliminates the need for a current sense resistor and improves efficiency.

Optional Burst Mode operation provides high efficiency operation at light loads. 100% duty cycle provides low dropout operation, extending operating time in battery-powered systems. Burst Mode is inhibited when the MODE pin is pulled low to reduce noise and RF interference.

The LTC3809-1 allows either coincident or ratiometric output voltage tracking. Switching frequency is fixed at 550kHz. Fault protection is provided by an overvoltage comparator and a short-circuit current limit comparator.

The LTC3809-1 is available in tiny footprint thermally enhanced DFN and 10-lead MSOP packages.

Features Package
LTC3809 PLL, Selectable Spread Spectrum, Power Good 3x3 DFN-10, MS-10E
LTC3809-1 Tracking 3x3 DFN-10, MS-10E
LTC3808 PLL, Selectable Spread Spectrum, Tracking, Power Good 4x3 DFN-14, SSOP-16

Applications

  • 1- or 2-Cell Lithium-Ion Powered Devices
  • Notebook and Palmtop Computers, PDAs
  • Portable Instruments
  • Distributed DC Power Systems
Part Models 8
1ku List Price Starting From $3.02

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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LTC3809IDD-1#TRPBF
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LTC3809IMSE-1#PBF
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Product Lifecycle

PCN

Jun 5, 2024

- 24_0003

Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)

LTC3809EMSE-1#PBF

PRODUCTION

LTC3809EMSE-1#TRPBF

PRODUCTION

LTC3809IMSE-1#PBF

PRODUCTION

LTC3809IMSE-1#TRPBF

PRODUCTION

Feb 4, 2020

- 20_0130

Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC

LTC3809EMSE-1#PBF

PRODUCTION

LTC3809EMSE-1#TRPBF

PRODUCTION

LTC3809IMSE-1#PBF

PRODUCTION

LTC3809IMSE-1#TRPBF

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Jun 5, 2024

- 24_0003

arrow down

Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)

LTC3809EMSE-1#PBF

PRODUCTION

LTC3809EMSE-1#TRPBF

PRODUCTION

LTC3809IMSE-1#PBF

PRODUCTION

LTC3809IMSE-1#TRPBF

PRODUCTION

Feb 4, 2020

- 20_0130

arrow down

Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC

LTC3809EMSE-1#PBF

PRODUCTION

LTC3809EMSE-1#TRPBF

PRODUCTION

LTC3809IMSE-1#PBF

PRODUCTION

LTC3809IMSE-1#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

Tools & Simulations

Tools & Simulations 1

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

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