LT8609S

RECOMMENDED FOR NEW DESIGNS

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

Data Sheet (Rev. D) Product Selection Table

Part Models: 8
1ku List Price: Starting From $3.24

Viewing:

Part Details

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 I_Q Regulating 12V_IN to 3.3V_OUT
- Output Ripple <10mV_P-P
High Efficiency 2MHz Synchronous Operation:
- >93% Efficiency at 1A, 12V_IN to 5V_OUT

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

Part Models: 8
1ku List Price: Starting From $3.24

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LT8609SEV#PBF	16-Lead LQFN (3mm x 3mm x 0.94mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8609SEV#TRPBF	16-Lead LQFN (3mm x 3mm x 0.94mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8609SEV#WPBF	16-Lead LQFN (3mm x 3mm x 0.94mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8609SEV#WTRPBF	16-Lead LQFN (3mm x 3mm x 0.94mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8609SIV#PBF	16-Lead LQFN (3mm x 3mm x 0.94mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8609SIV#TRPBF	16-Lead LQFN (3mm x 3mm x 0.94mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8609SIV#WPBF	16-Lead LQFN (3mm x 3mm x 0.94mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8609SIV#WTRPBF	16-Lead LQFN (3mm x 3mm x 0.94mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Nov 5, 2024 - 24_0252 LT8609S Alternate Assembly Site and Mold Compound Change
		PCN24_0252_Form Material_Report Qualification Results Summary
LT8609SEV#PBF	PRODUCTION
LT8609SEV#TRPBF	PRODUCTION
LT8609SIV#PBF	PRODUCTION
LT8609SIV#TRPBF	PRODUCTION
May 17, 2019 - 19_0067 Notification of Wafer Fab Location Change for 0.35 BCD Process
		PCN19_0067_Form Material_Report Delta Qualification Matrix Qualification Results Summary Detailed Parts List Other
LT8609SEV#PBF	PRODUCTION
LT8609SIV#PBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Hardware Ecosystem

Parts	Product Life Cycle	Description
High Voltage Hot Swap Controllers 1
LTC4380	RECOMMENDED FOR NEW DESIGNS	Low Quiescent Current Surge Stopper
Low Voltage Hot Swap Controllers 1
LTC4231	RECOMMENDED FOR NEW DESIGNS	Micropower Hot Swap Controller

Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

LT8609
LT8609A
LT8609B
LT8609S

LTpowerCAD 1

LT8609S Project - 2MHz Low EMI High Voltage Synchronous Buck Regulator (5.5-42V to 5V @ 2A)

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.

LTpowerCAD^® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.

Evaluation Kits

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

Buy Now View Details

Product Details

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.

Resources

DC2522A - Demo Manual
293.00K

DC2522A - Design Files
1.00M

DC2522A - Schematic
30.00K

Reference Designs

Blaize<sup>®</sup> Pathfinder P1600 Embedded System on Module

Pathfinder P1600 SOM Module

View Detailed Reference Design

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: