LTC3888-1

Dual Loop 8-Phase Step-Down DC/DC Controller with Digital Power System Management

英文数据手册

Rev. 0

推荐新设计使用

顶部

概览

优势和特点
产品详情

优势和特点

PMBus/I²C Compliant Serial Interface

Monitor Voltage, Current, Temperature and Faults
Digitally Program V_OUT, Margins, UV, OV, Current Limit, Soft-Start/Stop and Sequencing

Expandable to >16 Phases
External Resistor Divider Programs Output Voltage
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

产品详情

The LTC3888-1 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.

Output voltage is set with an external voltage divider. 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 current limit and device address can also be set using external programming resistors.

APPLICATIONS