LT8609S
Info : RECOMMENDED FOR NEW DESIGNS
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LT8609S

42V, 2A/3A Peak Synchronous Step-Down Regulator with 2.5μA Quiescent Current

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 8
1ku List Price Starting From $3.24
Features
  • Silent Switcher® 2 Architecture
    • Ultralow EMI Emissions on Any PCB
    • Eliminates PCB Layout Sensitivity
    • Internal Bypass Capacitors Reduce Radiated EMI
    • Optional Spread Spectrum Modulation
  • Wide Input Voltage Range: 3.0V to 42V
  • Ultralow Quiescent Current Burst Mode® Operation:
    • <2.5µA IQ Regulating 12VIN to 3.3VOUT
    • Output Ripple <10mVP-P
  • High Efficiency 2MHz Synchronous Operation:
    • >93% Efficiency at 1A, 12VIN to 5VOUT
  • 2A Maximum Continuous Output, 3A Peak Transient Output
  • Fast Minimum Switch-On Time: 45ns
  • Adjustable and Synchronizable: 200kHz to 2.2MHz
  • Allows Use of Small Inductors
  • Low Dropout
  • Peak Current Mode Operation
  • Internal Compensation
  • Output Soft-Start and Tracking
  • Small 16-Lead 3mm × 3mm LQFN Package
  • AEC-Q100 Qualified for Automotive Applications
Additional Details
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The LT8609S is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that consumes only 1.7µA of non-switching quiescent current. The LT8609S can deliver 2A of continuous current with peak loads of 3A (<1sec) to support applications such as GSM transceivers which require high transient loads. Top and bottom power switches are included with all necessary circuitry to minimize the need for external components. Low ripple Burst Mode operation enables high efficiency down to very low output currents while keeping the output ripple below 10mVP-P. A SYNC pin allows synchronization to an external clock, or spread spectrum modulation of switching frequencies for low EMI operation. Internal compensation with peak current mode topology allows the use of small inductors and results in fast transient response and good loop stability. The EN/UV pin has an accurate 1V threshold and can be used to program VIN undervoltage lockout or to shut down the LT8609S reducing the input supply current to 1µA. A capacitor on the TR/SS pin programs the output voltage ramp rate during start-up while the PG flag signals when VOUT is within ±8.5% of the programmed output voltage as well as fault conditions. The LT8609S is available in a small 16-lead 3mm × 3mm LQFN package.

APPLICATIONS

  • General Purpose Step Down
  • Low EMI Step Down
Part Models 8
1ku List Price Starting From $3.24

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LT8609SEV#PBF
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LT8609SEV#TRPBF
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LT8609SEV#WPBF
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LT8609SEV#WTRPBF
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LT8609SIV#PBF
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LT8609SIV#TRPBF
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LT8609SIV#WPBF
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LT8609SIV#WTRPBF
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Product Lifecycle

PCN

May 17, 2019

- 19_0067

Notification of Wafer Fab Location Change for 0.35 BCD Process

Filter by Model

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Reset Filters

Part Models

Product Lifecycle

PCN

May 17, 2019

- 19_0067

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Notification of Wafer Fab Location Change for 0.35 BCD Process

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

reference details image

DC2522A

LT8609S Demo Board | Silent Switcher 2 Buck, 5.5V ≤ VIN ≤ 42V, VOUT = 5V @ 2A, fSW = 2MH

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DC2522A

LT8609S Demo Board | Silent Switcher 2 Buck, 5.5V ≤ VIN ≤ 42V, VOUT = 5V @ 2A, fSW = 2MH

LT8609S Demo Board | Silent Switcher 2 Buck, 5.5V ≤ VIN ≤ 42V, VOUT = 5V @ 2A, fSW = 2MH

Product Detail

Demonstration circuit 2522A is a 42V, 2A/3A peak micropower synchronous step-down regulator featuring the LT8609S. The demo board is designed for 5V output from a 5.5V to 42V input. The wide input range allows a variety of input sources, such as automotive batteries and industrial supplies. The LT8609S is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that consumes only 2.5μA of quiescent current when output is regulated at 5V. Top and bottom power switches, compensation components and other necessary circuits are inside of the LT8609S to minimize external components and simplify design.

Tools & Simulations

Tools & Simulations 2

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.

Reference Designs

Reference Designs 2

Figure 1. CN0566 Simplified Block Diagram

Phased Array (Phaser) Development Platform

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CN0566

Phased Array (Phaser) Development Platform

CN0566

Circuits from the lab

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Phased Array (Phaser) Development Platform

Features and Benefits

  • 10 GHz to 10.5 GHZ Beamsteering Platform
  • 360 degree Phase Shift w/ 2.8 Degree Resolution
  • 31 dB Amplitude Tuning Range w/ 0.5 dB Resolution.
  • 8-Element Linear Array Antenna
  • Digitized with PlutoSDR
  • Runs directly on a Raspberry Pi
View Detailed Reference Design external link
Blaize<sup>&reg;</sup> Pathfinder P1600 Embedded System on Module

Pathfinder P1600 SOM Module

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blaize-pathfinder

Pathfinder P1600 SOM Module

blaize-pathfinder

Circuits from the lab

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Pathfinder P1600 SOM Module

Features and Benefits

Blaize® Pathfinder P1600 small form factor embedded SoM brings the programmability and efficiency benefits of the Blaize GSP® architecture, ideal for AI inferencing workloads at the edge, to embedded systems.

Analog Devices, Inc. supports end to end power delivery solutions for Blaize Pathfinder P1600 SOM. Blaize uses Analog Devices discrete power solutions to enable their System on Chip (SoC) to deliver high compute with optimized with most TOPS/Watt performance for datacenter and Artificial Intelligence.

ADI provides supporting documentation including power schematics, layout, LTpowerPlanner® and applicable LTpowerPlay® configuration files to enable you to validate the power solution for your application seamlessly.

For a complete list power designs and use cases, please contact your local FAE.

Key Power for full management devices are used as follows:

  • LTC7151S
  • LT8609S
  • LTC3636
  • ADP1752
  • ADP1755
View Detailed Reference Design external link

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