LP8758-EA数据手册TI中文资料规格书

描述 Description

The LP8758-EA device is designed to meet power management requirements for low-power processors in mobile phones, network cards, and similar applications. The device contains four step-down DC-DC converter cores, providing four output voltage rails. The device is controlled by an I2C-compatible serial interface.

The automatic PWM-PFM (AUTO mode) operation maximizes efficiency over a wide output-current range.

The LP8758-EA supports programmable start-up and shutdown sequencing synchronized to hardware Enable input signal.

The protection features include short-circuit protection, current limits, input supply UVLO, and temperature warning and shutdown functions. Several error flags are provided for status information of the device. In addition, the LP8758-EA device supports load current measurement without the addition of external current sense resistors. During start-up and voltage change, the device controls the output slew rate to minimize output voltage overshoot and the inrush current.

特性 Features

• Fully integrated quad buck, up to 4-A programmable maximum output current per buck
• Auto PWM-PFM and forced-PWM operations
• Programmable output voltage slew rate from 30 mV/µs to 0.5 mV/µs
• Input voltage range: 2.5 V to 5.5 V
• VOUT range: 0.5 V to 3.36 V with DVS

• Programmable start-up and shutdown sequencing with enable signal
• I2C-compatible interface that supports standard (100 kHz), fast (400 kHz), fast+ (1 MHz), and high-speed (3.4 MHz) modes
• Interrupt function with programmable masking
• Load current measurement
• Output short-circuit and overload protection
• Spread-spectrum mode for EMI reduction
• The four buck cores operate 90° out of phase thereby reducing input ripple current
• Overtemperature warning and protection
• Undervoltage Lockout (UVLO)