LTC3889 Datasheet | Analog Devices

Features 60V Dual Output Step-Down Controller with Digital Power System Management DESCRIPTION n PMBus/I2C pliant 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 pensation n Output Error Less Than ±0.5% Over Temperature n Integrated 16-Bit ADC and 12-Bit DAC n Integrated High Side Current Sense Amplifier n Internal EEPROM with ECC and Fault Logging n Integrated N-Channel MOSFET Gate Drivers Power Conversion n Wide VIN Range: 5V to 60V n VOUT0, VOUT1 Range: 1V to 40V n Analog Current Mode Control n Accurate Poly Phase® Current Sharing for Up to 6 Phases (85k Hz to 500k Hz) n Available in a 52-Lead (7mm × 8mm) QFN Package APPLICATIONS n Tele, Data, and Storage Systems n Industrial and Point of Load Applications The LTC®3889 is a dual Poly Phase DC/DC synchronous step-down switching regulator controller with I2C-based PMBus pliant serial interface. This controller employs a constant-frequency, current-mode architecture, with high voltage input and output capability along with programmable loop pensation. The LTC3889 is supported by the LTpower Play™ 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 LTC3889 can be configured for discontinuous (pulseskipping) mode or continuous inductor current mode. All registered trademarks and trademarks are the property of their respective owners. Protected by U.S. Patents including 5481178, 5705919, 5929620,...