Datasheet Analog Devices LT8550 — Ficha de datos

LT8550
4-Phase DC/DC Expander with
Internal Gate Drivers for Buck Converters
DESCRIPTION FEATURES Expands Up to Four Phases per Chip
nn Up to 80V Input or Output Voltage
nn Cascade with Multiple Chips for Very High Current
Applications
nn Supports Up to 18 Distinct Phases from 20° to 180°
nn Phases Can Share Phase Angle
nn Excellent DC and Transient Current Sharing
nn Phase-Lockable Fixed Frequency 125kHz to 1MHz
nn Supports Bidirectional Current Flow
nn R
SENSE or DCR Current Sensing
nn Eliminates the Need to Route Sensitive Feedback and
Control Signals
nn 52-Lead (7mm × 8mm) QFN Package The LT®8550 is a multiphase expander for synchronous
buck DC/DC converters. It operates in tandem with any
buck DC/DC converter to increase the load current capability by adding additional phases, which are clocked outof-phase to reduce ripple current and filtering capacitance.
It easily adds phases without the need to route sensitive
feedback and control signals. nn The LT8550 integrates gate drivers and can support up
to four buck phases per device. Multiple LT8550’s can
be used for up to 18 phases. It accurately monitors and …