LP8758A1B0YFFR.A中文资料德州仪器数据手册PDF规格书

1 Features

1• High-Efficiency Step-Down Four-Phase DC/DC

Converter Cores:

– Maximum Output Current 16 A

– Auto PWM-PFM and Forced-PWM Operations

– Auto Phase Adding/Shedding and Force Multi-

Phase Operations

– Remote Differential Feedback Voltage Sensing

– Programmable Output Voltage Slew-Rate from

30 mV/μs to 0.5 mV/μs

– VOUT Range = 0.5 V to 3.36 V with DVS

• Programmable Start-up and Shutdown Delays

with Enable Signal

• I2C-Compatible Interface which 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 and Phase Interleaving

for EMI Reduction

• Overtemperature Warning and Protection

• Undervoltage Lockout (UVLO)

2 Applications

• Smart Phones, eBooks and Tablets

• Gaming Devices

3 Description

The LP8758 is designed to meet the power

management requirements of the latest application

processors in mobile phones and similar portable

applications. The device contains four step-down

DC/DC converter cores, which are bundled together

in a single 4-phase buck converter. The device is

controlled by an I2C-compatible serial interface.

The automatic PWM-PFM (AUTO mode) operation,

together with the automatic phase adding/shedding,

maximizes efficiency over a wide output-current

range. The LP8758 supports remote differential

voltage sensing to compensate IR drop between the

regulator output and the point-of-load, thus improving

the accuracy of the output voltage.

The LP8758 supports programmable start-up and

shutdown delays synchronized to Enable 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 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.