Features and Benefits
- PMBus/I2C Compliant Serial Interface
- Monitor Voltage, Current, Temperature and Faults
- Digitally Program VOUT, Margins, UV, OV, Current Limit, Soft-Start/Stop and Sequencing
- Expandable to >16 Phases
- 4.5V ≤ VIN ≤ 26.5V, 0.3V ≤ VOUT ≤ 3.45V
- ±0.5% Output Voltage Accuracy
- Programmable PWM Loop Compensation
- Accurate PolyPhase® Current Sharing
- Internal EEPROM with ECC and Fault Logging
- DrMOS Output Current Monitor Interface
- DrMOS Temperature/Fault Bus Interface
- DrMOS Gate Drive Supply Monitor
- Load Step Emulation
- Internal or External PWM Clock from 250kHz to 1MHz
- 52-Pin (5mm × 8mm) QFN Package
- AEC-Q100 Qualified for Automotive Applications
The LTC3888/LTC3888-1/LTC3888-2 is a PMBus-compliant dual loop DC/DC synchronous step-down switching regulator controller with eight expandable phases supporting a wide range of master/slave configurations. The controller uses constant frequency current mode architecture to provide excellent transient response and output regulation. Each PWM master is capable of producing output voltages from 0.3V to 3.45V with multiple phase configurations using DrMOS devices that provide an output current monitor.
PMBus configuration and monitoring is supported by LTpowerPlay™ software. Programmable loop compensation and built-in load step emulation facilitate setting bandwidth based on input voltage and output load capacitance. PMBus commands allow read back of input voltage, output voltage and current, and operating status. Operating parameters can be set via PMBus command or stored in internal EEPROM for use at power up. Switching frequency, phase configuration, output voltage (LTC3888/LTC3888-2), output current limit (LTC3888-1) and device address can also be set using external programming resistors.
- High Current Distributed Power Systems
- Servers, Network and Storage Equipment
Product Lifecycle Pre-Release
This product is new and engineering validation may still be underway. Quantities may be limited and design specifications may change while we ready the product for release to production.
Documentation & Resources
AN-173: Designing High Phase Count Rails with LTC3888 (Rev. 0)3/9/20211 M
AN-166: In Flight Update with Linduino4/10/20171M
AN-155: Fault Log Decoding with Linduino PSM1/26/2017224K
AN-153: Linduino for Power System Management12/5/20161M
AN-152: Power System Management Addressing (Rev. A)7/12/2016164K
AN-145: Overview of the EEPROM in LTC PSM Devices7/20/20152M
AN-137: Accurate Temperature Sensing with an External P-N Junction9/20/2012527K
Tools & Simulations
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.
Models for the following parts are available in LTspice:
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 Number||Material Declaration||Reliability Data||Pin/Package Drawing||CAD Symbols, Footprints & 3D Models|
|LTC3888IUHG-2#PBF||Material Declaration||Reliability Data||52-Lead QFN (5mm x 8mm x 0.75mm w/ EP)|
|LTC3888IUHG-2#TRPBF||Material Declaration||Reliability Data||52-Lead QFN (5mm x 8mm x 0.75mm w/ EP)|
|LTC3888IUHG-2#WPBF||Material Declaration||Reliability Data||52-Lead QFN (5mm x 8mm x 0.75mm w/ EP)|
|LTC3888IUHG-2#WTRPBF||Material Declaration||Reliability Data||52-Lead QFN (5mm x 8mm x 0.75mm w/ EP)|
|Wafer Fabrication Data|
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