LTC3887

RECOMMENDED FOR NEW DESIGNS

Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management

Analog Devices LTC3887 Product Info

10 February 2026 6

Features

PMBus/I²C Compliant Serial Interface
- Telemetry Read Back includes V_IN, I_IN, V_OUT, I_OUT, Temperature, Duty Cycle and Faults
- Programmable Voltage, Current Limit, Digital Soft-Start/Stop, Sequencing, Margining, OV/UV and Frequency Synchronization (250kHz to 1MHz)
±0.5% Output Voltage Accuracy Over Temperature
Integrated 16-Bit ADC
V_OUT Range: 0.5V to 5.5V (V_OUT0, V_OUT1)
Internal EEPROM and Fault Logging with ECC

Integrated N-Channel MOSFET Gate Drivers (LTC3887)
Minimum On-Time 45ns
Wide V_IN Range: 4.5V to 24V
Analog Current Mode Control Loop
Remote Differential Sense for PolyPhase^® Applications
Accurate PolyPhase Current Sharing for Up to Six Phases
Available in a 40-Pin (6mm × 6mm) QFN Package
AEC-Q100 Qualified for Automotive Applications

Part details & applications

The LTC3887/LTC3887-1/LTC3887-2 are dual, PolyPhase DC/DC synchronous step-down switching regulator controllers with an I²C-based PMBus compliant serial interface. The controllers use a constant frequency, current mode architecture that is supported by LTpowerPlay^® a software development tool with graphical user interface (GUI).

Switching frequency, channel phasing, output voltage, and device address can be programmed using external configuration resistors. Additionally, parameters can be set via the digital interface or stored in EEPROM. Voltage, current, internal/external temperature and fault status can be read back through the bus interface.

The LTC3887 has integrated gate drivers. The LTC3887-1 has three-state PWM pins to drive DrMOS power stages. The LTC3887-2 has gate drivers and no LDO and supports V_IN up to 34V. The LTC3887 is an enhanced version of the LTC3880 with greater output voltage range and more digital features.

Applications

High Current Distributed Power Systems
Telecom, Datacom and Storage Systems
Intelligent Energy Efficient Power Regulation

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