LT8602
RECOMMENDED FOR NEW DESIGNS42V Quad Monolithic Synchronous Step-Down Regulator
- Part Models
- 14
- 1ku List Price
- Starting From $8.07
Overview
- 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 IQ at 12VIN
- 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
The LT8602 is a quad channel, current mode, monolithic buck switching regulator with a programmable power-on reset. All regulators are synchronized to a single oscillator with an adjustable frequency from 250kHz to 2.2MHz. The LT8602 can be configured for micropower Burst Mode operation or pulse-skipping operation at light load. Micropower operation results in quiescent current of 30μA with all four regulators operating in the application below.
The high voltage channels are synchronous buck regulators that operate from an input of 3V to 42V. The output currents are up to 1.5A (OUT1) and 2.5A (OUT2). The low voltage channels operate from an input of 2.6V to 5.5V. Internal synchronous power switches provide high efficiency with output currents up to 1.8A. The LT8602 uses a 2-phase clock with channels 1 and 3 operating 180° from channels 2 and 4 to reduce input ripple current on both HV and LV inputs. All channels have cycle-by-cycle current limit, providing protection against shorted outputs. Thermal shutdown provides additional protection
The LT8602 is available in either a 40-lead 6mm × 6mm QFN or a 48-Lead 7mm × 7mm LQFP package.
APPLICATIONS
- Automotive Systems
- Distributed Supply Regulation
- Industrial Controls and Power Supplies
Documentation
Data Sheet 1
User Guide 1
Application Note 1
Design Note 1
Technical Articles 4
Video 1
Brochure 1
Analog Dialogue 1
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) | ||
| LT8602EUJ#PBF | 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP) | ||
| LT8602EUJ#TRPBF | 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP) | ||
| LT8602EUJ#WPBF | 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP) | ||
| LT8602EUJ#WTRPBF | 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP) | ||
| LT8602ILXE#PBF | 48-Lead LQFP (7mm x 7mm w/ EP) | ||
| LT8602IUJ#PBF | 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP) | ||
| LT8602IUJ#TRPBF | 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP) | ||
| LT8602IUJ#WPBF | 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP) | ||
| LT8602IUJ#WTRPBF | 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP) | ||
| LT8602JUJ#PBF | 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP) | ||
| LT8602JUJ#TRPBF | 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP) | ||
| LT8602JUJ#WPBF | 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP) | ||
| LT8602JUJ#WTRPBF | 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 6, 2021 - 21_0046 Transfer of LQFP and LQFP_EP from AEM to AET |
||
| LT8602ELXE#PBF | PRODUCTION | |
| LT8602ILXE#PBF | PRODUCTION | |
|
Apr 11, 2019 - 19_0067 Notification of Wafer Fab Location Change for 0.35 BCD Process |
||
| 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) |
||
| 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
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
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Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LT8602
LTpowerCAD 2
- LT8602 Project - Quad 42V Synchronous Monolithic Step-Down Regulator, Low Voltage Phases (3.3V to 1.8V & 1.2V @ 1.8A)
- LT8602 Project - Quad 42V Synchronous Monolithic Step-Down Regulator, High Voltage Phases (7-40V to 5V @ 1.5A & 3.3V @ 2.5A)
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