LT8601

RECOMMENDED FOR NEW DESIGNS

42V Triple Monolithic Synchronous Step-Down Regulator

Data Sheet (Rev. B) Product Selection Table

Part Models: 12
1ku List Price: Starting From $6.13

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Part Details

Flexible Power Supply System Providing Three Outputs Over a Wide Input Voltage Range
Two High Voltage Synchronous Buck Regulators
- 3V to 42V Input Voltage Range
- Output Currents Up to 2.5A and 1.5A
- High Efficiency Up to 93%
One Low Voltage Synchronous Buck Regulator
- 2.6V to 5.5V Input Voltage Range
- Output Current Up to 1.8A and 95% Efficiency
Programmable Power-On Reset

Resistor Programmable and Synchronizable from 250kHz to 2.2MHz Switching Frequency
Low Ripple Burst Mode^® Operation
- 30μA I_Q at 12V_IN to 3.3V_OUT2
- Output Ripple <15mV
Power Good Indicators
2-Phase Clock Reduces Input Current Ripple
Available in Thermally Enhanced 40-Lead QFN (6mm × 6mm) Package
AEC-Q100 Qualified for Automotive Applications

Part Models: 12
1ku List Price: Starting From $6.13

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
LT8601EUJ#PBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8601EUJ#TRPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8601EUJ#WPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8601EUJ#WTRPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8601IUJ#PBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8601IUJ#TRPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8601IUJ#WPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8601IUJ#WTRPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8601JUJ#PBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8601JUJ#TRPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8601JUJ#WPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8601JUJ#WTRPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Apr 11, 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
LT8601EUJ#PBF	PRODUCTION
LT8601EUJ#TRPBF	PRODUCTION
LT8601IUJ#PBF	PRODUCTION
LT8601IUJ#TRPBF	PRODUCTION

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

Hardware Ecosystem

Parts	Product Life Cycle	Description
Surge Stopper, Overvoltage, and Overcurrent Protection 1
LT4363	RECOMMENDED FOR NEW DESIGNS	High Voltage Surge Stopper with Current Limit

Parts	Product Life Cycle	Description
LT8602	RECOMMENDED FOR NEW DESIGNS	42V Quad Monolithic Synchronous Step-Down Regulator
LT8616	PRODUCTION	Dual 42V Synchronous Monolithic Step-Down Regulator with 6.5μA Quiescent Current

Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

LT8601

LTpowerCAD 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.

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

LT8601EUJ Demo Board | Triple Sync Buck, 6V ≤ VIN ≤ 24V, 5VOUT1 @ 1.5A, 3.3VOUT2 @ 2.5A and 1.8VOUT3 @ 1.8A, 2MHz FSW

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Product Details

Demonstration circuit 2346A is a triple power supply featuring the LT8601. LT8601 is a 42V triple monolithic synchronous step-down regulator. The demo circuit is designed for 5V, 3.3V, and 1.8V outputs from a nominal 12V input, with switching frequency set at 2MHz to avoid audio band. The 1.8V converter is powered from the 3.3V output, and the 5V, 3.3V are powered from a wide range of 6V to 24V, transient to 42V. The current capability is 2.5A for the 3.3V output, 1.5A for the 5V output, and 1.8A for the 1.8V output when running individually. Up to 1A load current can be applied to all the channels simultaneously without special cooling.