LT8602

RECOMMENDED FOR NEW DESIGNS

42V Quad Monolithic Synchronous Step-Down Regulator

Data Sheet (Rev. C) Product Selection Table

Part Models: 14
1ku List Price: Starting From $6.37

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Part Details

Flexible Power Supply System Providing Four Outputs with a Wide Input 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%
Two Low Voltage Synchronous Buck Regulators:

2.6V to 5.5V Input Voltage Range
Output Currents Up to 1.8A and 94% Efficiency

Programmable Power-On Reset
Power Good Indicators

Resistor Programmable and Synchronizable 250kHz to 2.2MHz Switching Frequency
Low Ripple Burst Mode^® Operation:

30μA I_Q at 12V_IN
Output Ripple < 15mV

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: 14
1ku List Price: Starting From $6.37

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
LT8602ELXE#PBF	48-Lead LQFP (7mm x 7mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8602EUJ#PBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8602EUJ#TRPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8602EUJ#WPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8602EUJ#WTRPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8602ILXE#PBF	48-Lead LQFP (7mm x 7mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8602IUJ#PBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8602IUJ#TRPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8602IUJ#WPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8602IUJ#WTRPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8602JUJ#PBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8602JUJ#TRPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8602JUJ#WPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8602JUJ#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 6, 2021 - 21_0046 Transfer of LQFP and LQFP_EP from AEM to AET
		PCN21_0046_Form Material_Report Qualification Results Summary Other
LT8602ELXE#PBF	PRODUCTION
LT8602ILXE#PBF	PRODUCTION
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
LT8602ELXE#PBF	PRODUCTION
LT8602EUJ#PBF	PRODUCTION
LT8602EUJ#TRPBF	PRODUCTION
LT8602ILXE#PBF	PRODUCTION
LT8602IUJ#PBF	PRODUCTION
LT8602IUJ#TRPBF	PRODUCTION
Apr 17, 2025 - 25_0043 Change of Gold to Copper Wire and BOM (Automotive)
		PCN25_0043_Form Material_Report Delta Qualification Matrix Qualification Results Summary
LT8602EUJ#WPBF	PRODUCTION
LT8602EUJ#WTRPBF	PRODUCTION
LT8602IUJ#PBF	PRODUCTION
LT8602IUJ#TRPBF	PRODUCTION
LT8602JUJ#PBF	PRODUCTION
LT8602JUJ#TRPBF	PRODUCTION
LT8602JUJ#WPBF	PRODUCTION
LT8602JUJ#WTRPBF	PRODUCTION

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

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Digital Power System Managers 1
LTC2975	RECOMMENDED FOR NEW DESIGNS	4-Channel PMBus Power System Manager Featuring Accurate Input Current and Energy Measurement
Surge Stopper, Overvoltage, and Overcurrent Protection 1
LT4363	RECOMMENDED FOR NEW DESIGNS	High Voltage Surge Stopper with Current Limit

Parts	Product Life Cycle	Description
LT8601	RECOMMENDED FOR NEW DESIGNS	42V Triple 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:

LT8602

LTpowerCAD 2

Design tools for the following parts are available in LTpowerCAD:

LT8602HV
LT8602LV

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

LT8602 Demo Board | Quad Sync Buck; 5.5V ≤ VIN ≤ 42V, VOUT1/VOUT2/VOUT3/VOUT4 = 5V/3.3V/ 1.8V/1.2V @ 1A

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Product Details

Demonstration circuit 1949A is a quad power supply featuring the LT8602. LT8602 is a 42V quad monolithic synchronous step-down regulator. The demo circuit is designed for 5.0V, 3.3V, 1.8V, and 1.2V outputs from a nominal 12V input, with switching frequency set at 2MHz to avoid audio band. The 1.8V and 1.2V converters are powered from the 3.3V output. The 5V, 3.3V are powered from a wide range of 5.5V to 42V. The current capability is 2.5A for the 3.3V output, 1.5A for the 5V output, and 1.8A for the other outputs when running individually. Up to 1A load current can be applied to all the channels simultaneously without special cooling.

Resources

DC1949A - Design Files
7/15/2015

DC1949A - Schematic
7/15/2015

DC1949A - Demo Manual
7/15/2015

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Part Details

Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Design Note 1

Technical Articles 4

Video 1

Solutions Bulletin & Brochure 1

Analog Dialogue 1