LTC3886
LTC3886-1
RECOMMENDED FOR NEW DESIGNS
60V Dual Output Step-Down Controller with Digital Power System Management
- Part Models
- 8
- 1ku List Price
- Starting From $9.54
Overview
- PMBus/I2C Compliant Serial Interface
- Telemetry Read-Back Includes VIN, IIN, VOUT, IOUT, Temperature and Faults
- Programmable Voltage, Current Limit, Digital Soft-Start/Stop, Sequencing, Margining, OV/UV/OC, Frequency, and Control Loop Compensation
- Output Error Less Than ±0.5% Over Temperature
- Integrated 16-Bit ADC and 12-Bit DAC
- Integrated High Side Current Sense Amplifier
- Internal EEPROM with ECC and Fault Logging
- Integrated N-Channel MOSFET Gate Drivers
- Wide VIN Range: 4.5V to 60V
- VOUT0, VOUT1 Range: 0.5V to 13.8V
- Analog Current Mode Control
- Accurate PolyPhase® Current Sharing for Up to 6 Phases (100kHz to 750kHz)
- Available in a 52-Lead (7mm × 8mm) QFN Package
The LTC3886/LTC3886-1 is a dual PolyPhase DC/DC synchronous step-down switching regulator controller with I2C-based PMBus compliant serial interface. This controller employs a constant-frequency, current-mode architecture, with high voltage input and output capability along with programmable loop compensation. The LTC3886 is supported by the LTpowerPlay® software development tool with graphical user interface (GUI).
The EXTVCC pin supports voltages up to 14V allowing for optimized circuit efficiency and die temperature, and for the controller output to supply the chip power. Switching frequency, output voltage, and device address can be programmed both by digital interface as well as external configuration resistors. Parameters can be set via the digital interface or stored in EEPROM. Both outputs have an independent power good indicator and FAULT function.
The LTC3886 can be configured for discontinuous (pulse-skipping) mode or continuous inductor current mode. The LTC3886-1 also includes a sequencing off feature to discharge very large output capacitors.
APPLICATIONS
- Telecom, Datacom, and Storage Systems
- Industrial and Point of Load Applications
Documentation
Data Sheet 1
User Guide 3
Application Note 8
Technical Articles 2
Informational 1
Spec Notice 1
Video 1
Brochure 1
Device Drivers 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 |
|---|---|---|---|
| LTC3886EUKG#PBF | 52-Lead Plastic QFN (7mm x 8mm x 0.75mm w/ EP) | ||
| LTC3886EUKG#TRPBF | 52-Lead Plastic QFN (7mm x 8mm x 0.75mm w/ EP) | ||
| LTC3886EUKG-1#PBF | 52-Lead Plastic QFN (7mm x 8mm x 0.75mm w/ EP) | ||
| LTC3886EUKG-1#TRPBF | 52-Lead Plastic QFN (7mm x 8mm x 0.75mm w/ EP) | ||
| LTC3886IUKG#PBF | 52-Lead Plastic QFN (7mm x 8mm x 0.75mm w/ EP) | ||
| LTC3886IUKG#TRPBF | 52-Lead Plastic QFN (7mm x 8mm x 0.75mm w/ EP) | ||
| LTC3886IUKG-1#PBF | 52-Lead Plastic QFN (7mm x 8mm x 0.75mm w/ EP) | ||
| LTC3886IUKG-1#TRPBF | 52-Lead Plastic QFN (7mm x 8mm x 0.75mm w/ EP) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Device Drivers 1
Evaluation Software 0
Can't find the software or driver you need?
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Power System Management (PSM) & Sequencers 1 | ||
| LTC2975 | RECOMMENDED FOR NEW DESIGNS | 4-Channel PMBus Power System Manager Featuring Accurate Input Current and Energy Measurement |
| Parts | Product Life Cycle | Description |
|---|---|---|
| LTC3880 | RECOMMENDED FOR NEW DESIGNS | Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management |
|
LTC3884 LTC3884-1 |
RECOMMENDED FOR NEW DESIGNS | Dual Output PolyPhase Step-Down Controller with Sub-Milliohm DCR Sensing and Digital Power System Management |
Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LTC3886
- LTC3886-1
Linduino 3
LTpowerCAD 2
- LTC3886 Project - High Efficiency, Dual Output Step-Down Converter with PMBus (18-54V to 12V & 5V @ 12A)
- LTC3886 & LTC3870 Project - 4 Phase Single Output PMBus Buck (18-54Vin to 12Vout @ 48A)
Design tools for the following parts are available in LTpowerCAD:
- LTC3886
- LTC3886+LTC3870
LTpowerPlay®
LTpowerPlay® is a powerful, Windows-based development environment supporting Linear Technology's Digital Power System Management (PSM) products.
Open ToolLTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Linduino is Analog Devices’ Arduino compatible system for developing and distributing firmware libraries and example code for our integrated circuits. Each Linduino-supported product includes an example main program, defined in the LTSketchbook/Part Number folder and driver code, defined in the LTSketchbook/libraries folder.
Linduino code repository on GitHub and instructions on how to use the code.
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
LTC3886UKG Demo Board (RSENSE) Dual Phase Dual Output PMBus Buck 18V≤VIN≤54V, VOUT0/VOUT1=5V to 12V at 12A per channel, 150kHz
Resources
Software
LTC3886 UKG Package Clamshell Programming Demo Board
Resources
LTC3886UKG/LTC3870UFD Demo Board (RSENSE) | 4 Phase Single Output PMBus Buck 18V≤VIN ≤54V, VOUT=12V at 48A, 150kHz
Resources
Software
Total Power Management: Hot Swap, Intermediate Bus Voltage, Point-of-Load (Featuring LTC4281, LTC3886, LTC3887, LTC2975) [Requires DC1613]