LTC3569
Info: : PRODUCTION
searchIcon
cartIcon

LTC3569

Triple Buck Regulator with 1.2A and Two 600mA Outputs and Individual Programmable References

Show More showmore-icon

Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 12
1ku List Price Starting From $3.72
Features
  • Three Independent Current Mode Buck DC/DC Regulators (1.2A and 2 × 600mA)
  • Single Pin Programmable VFB Servo Voltages from 800mV Down to 425mV (in 25mV Steps)
  • Pull VFB High to Make Each 600mA Buck a Slave for Higher Current Operation
  • Pulse-Skipping or Burst Mode® Operation
  • Programmable Switching Frequency (1MHz to 3MHz) or Fixed 2.25MHz
  • Synchronizable (1.2MHz to 3MHz)
  • VIN Range 2.5V to 5.5V
  • All Regulators Internally Compensated
  • PGOOD Output Flag
  • Quiescent Current <100μA (All Regulators in Burst Mode Operation)
  • Zero Shutdown Current
  • Overtemperature and Short-Circuit Protection
  • Tiny 3mm × 3mm, 3mm × 4mm 20-Lead QFN and Thermally Enhanced TSSOP FE-16 Packages
Additional Details
show more Icon

The LTC3569 contains three monolithic, synchronous step-down DC/DC converters. Intended for medium power applications, it operates over a 2.5V to 5.5V input voltage range. The operating frequency is adjustable from 1MHz to 3MHz, allowing the use of tiny, low cost capacitors and inductors. The three output voltages are independently programmable by toggling the EN pins up to 15 times, lowering the 800mV FB references by 25mV per cycle. The first buck regulator sources load currents up to 1200mA. The other two buck regulators each provide 600mA.

The two 600mA buck regulators can also be configured to operate as slave power stages, running in parallel with another internal buck regulator to supply higher load currents. When operating as parallel, slave output stages, discrete external components are shared and available output currents sum together.

Applications

  • Portable Applications with Multiple Supply Rails
  • General Purpose Step-Down DC/DC
  • Dynamic Voltage Scaling Applications
Part Models 12
1ku List Price Starting From $3.72

close icon
Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC3569EFE#PBF
  • HTML
  • HTML
LTC3569EFE#TRPBF
  • HTML
  • HTML
LTC3569EUD#PBF
  • HTML
  • HTML
LTC3569EUD#TRPBF
  • HTML
  • HTML
LTC3569EUDC#PBF
  • HTML
  • HTML
LTC3569EUDC#TRPBF
  • HTML
  • HTML
LTC3569IFE#PBF
  • HTML
  • HTML
LTC3569IFE#TRPBF
  • HTML
  • HTML
LTC3569IUD#PBF
  • HTML
  • HTML
LTC3569IUD#TRPBF
  • HTML
  • HTML
LTC3569IUDC#PBF
  • HTML
  • HTML
LTC3569IUDC#TRPBF
  • HTML
  • HTML

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Apr 6, 2022

- 22_0068

Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

LTC3569EFE#PBF

PRODUCTION

LTC3569EFE#TRPBF

PRODUCTION

LTC3569IFE#PBF

PRODUCTION

LTC3569IFE#TRPBF

PRODUCTION

Jun 30, 2020

- 20_0244

Notification of Wafer Fab Location Change for 0.6µm CMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)

LTC3569EFE#PBF

PRODUCTION

LTC3569EFE#TRPBF

PRODUCTION

LTC3569EUD#PBF

PRODUCTION

LTC3569EUD#TRPBF

PRODUCTION

LTC3569EUDC#PBF

PRODUCTION

LTC3569EUDC#TRPBF

PRODUCTION

LTC3569IFE#PBF

PRODUCTION

LTC3569IFE#TRPBF

PRODUCTION

LTC3569IUD#PBF

PRODUCTION

LTC3569IUD#TRPBF

PRODUCTION

LTC3569IUDC#PBF

PRODUCTION

LTC3569IUDC#TRPBF

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Apr 6, 2022

- 22_0068

arrow down

Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

LTC3569EFE#PBF

PRODUCTION

LTC3569EFE#TRPBF

PRODUCTION

LTC3569IFE#PBF

PRODUCTION

LTC3569IFE#TRPBF

PRODUCTION

Jun 30, 2020

- 20_0244

arrow down

Notification of Wafer Fab Location Change for 0.6µm CMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)

LTC3569EFE#PBF

PRODUCTION

LTC3569EFE#TRPBF

PRODUCTION

LTC3569EUD#PBF

PRODUCTION

LTC3569EUD#TRPBF

PRODUCTION

LTC3569EUDC#PBF

PRODUCTION

LTC3569EUDC#TRPBF

PRODUCTION

LTC3569IFE#PBF

PRODUCTION

LTC3569IFE#TRPBF

PRODUCTION

LTC3569IUD#PBF

PRODUCTION

LTC3569IUD#TRPBF

PRODUCTION

LTC3569IUDC#PBF

PRODUCTION

LTC3569IUDC#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

reference details image

DC1340A

LTC3569EUD Demo Board | Triple Buck Regulator with 1.2A and Two 600mA Outputs and Individual Programmable References

zoom

DC1340A

LTC3569EUD Demo Board | Triple Buck Regulator with 1.2A and Two 600mA Outputs and Individual Programmable References

LTC3569EUD Demo Board | Triple Buck Regulator with 1.2A and Two 600mA Outputs and Individual Programmable References

Product Detail

Demonstration circuit 1340 is a triple output regulator consisting of three constant-frequency step-down converters integrated into LTC3569. DC1340 has an input voltage range of 2.5V to 5.5V, with regulators capable of delivering 1.2A or 600mA of load current on corresponding output. The three regulators operate independently with individual Enable pins and enter pulse skipping or burst mode at low loads for increasing efficiency. The DC1340 is a very efficient circuit with efficiency reading above 90%. High operating frequency of 2.25MHz allows exclusive use of the small size, low profile surface mount components. These features plus internal compensation circuits and extremely low quiescent current make the DC1340 demo board an ideal circuit for use in battery-powered, hand-held applications.

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.

Recently Viewed