LP8758-E3数据手册TI中文资料规格书

描述 Description

The LP8758-E3 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-E3 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-E3 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)