LT8601
RECOMMENDED FOR NEW DESIGNS42V Triple Monolithic Synchronous Step-Down Regulator
- Part Models
- 12
- 1ku List Price
- Starting From $7.76
Overview
- 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 IQ at 12VIN to 3.3VOUT2
- 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
The LT8601 is a triple 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 LT8601 can be configured for micropower Burst Mode or Pulse-Skipping operation at light load. Micropower operation results in quiescent current of 30μA with all three regulators operating as shown in the application below with no load applied.
The high voltage channels are synchronous buck regulators that operate from an input of 3.0V to 42V. The output currents are up to 1.5A (OUT1) and 2.5A (OUT2). The low voltage channel operates from an input of 2.6V to 5.5V. Internal synchronous power switches provide high efficiency with output currents up to 1.8A. The LT8601 uses a 2-phase clock with channel 1 operating 180° from channels 2 and 3 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 LT8601 is available in a 40-lead 6mm × 6mm QFN package.
APPLICATIONS
- Automotive Systems
- Distributed Supply Regulation
- Industrial Controls and Power Supplies
Documentation
Data Sheet 1
User Guide 1
Technical Articles 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 |
|---|---|---|---|
| LT8601EUJ#PBF | 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP) | ||
| LT8601EUJ#TRPBF | 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP) | ||
| LT8601EUJ#WPBF | 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP) | ||
| LT8601EUJ#WTRPBF | 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP) | ||
| LT8601IUJ#PBF | 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP) | ||
| LT8601IUJ#TRPBF | 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP) | ||
| LT8601IUJ#WPBF | 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP) | ||
| LT8601IUJ#WTRPBF | 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP) | ||
| LT8601JUJ#PBF | 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP) | ||
| LT8601JUJ#TRPBF | 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP) | ||
| LT8601JUJ#WPBF | 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP) | ||
| LT8601JUJ#WTRPBF | 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 11, 2019 - 19_0067 Notification of Wafer Fab Location Change for 0.35 BCD Process |
||
| LT8601EUJ#PBF | PRODUCTION | |
| LT8601EUJ#TRPBF | PRODUCTION | |
| LT8601IUJ#PBF | PRODUCTION | |
| LT8601IUJ#TRPBF | 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
| Parts | Product Life Cycle | Description |
|---|---|---|
| Hot Swap Controllers 1 | ||
| LT4363 | RECOMMENDED FOR NEW DESIGNS | High Voltage Surge Stopper with Current Limit |
Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LT8601
LTpowerCAD 2
- LT8601 Project - Triple Synchronous Step-Down Regulator, High Voltage Phases (6-24V to 5V @ 1.5A & 3.3V @ 2.5A)
- LT8601 Project - Triple Synchronous Step-Down Regulator, Low Voltage Phase (3.3V to 1.8V @ 1.8A)
Design tools for the following parts are available in LTpowerCAD:
- LT8601HV
- LT8601LV
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.
