LP877020RHBRQ1集成電路（IC）的電源管理-專用規(guī)格書PDF中文資料

1 Features

? AEC-Q100 Qualified for Automotive Applications:

– Device Temperature Grade 1: –40°C to

+125°C, TA

? Functional Safety Quality-Managed

– Documentation Available to Aid Functional

Safety System Design

– Two Inputs for External Voltage Monitoring

– Two Programmable Power-Good Signals

– Dedicated Reference Voltage for Diagnostics

– Window Watchdog with Reset Output

– Output Short-Circuit and Overload Protection

– Overtemperature Warning and Protection

– Overvoltage Protection (OVP) and

Undervoltage Lockout (UVLO)

? Two High-Efficiency Step-Down DC/DC

converters:

– Maximum Output Current 3.5 A

– 2-MHz, 3-MHz, or 4-MHz Switching Frequency

– Auto PWM/PFM and Forced-PWM Operations

– Output Voltage = 0.7 V to 3.36 V

? 5-V Boost Converter

– Maximum Output Current 600 mA

? External Clock Input to Synchronize Switching

? Spread-Spectrum Modulation

? Programmable Start-up and Shutdown Delays and

Sequencing with Enable Signal

? Configurable General Purpose Outputs (GPOs)

? I2C-Compatible Interface Supporting Standard

(100 kHz), Fast (400 kHz), Fast+ (1 MHz), and

High-Speed (3.4 MHz) Modes

? Interrupt Function with Programmable Masking

2 Applications

? Automotive Radar

? Automotive Camera

? Automotive Sensor Fusion

? Industrial Radar

? Building Automation

3 Description

The LP87702-Q1 helps meet the power management

requirements of the latest platforms, particularly in

automotive radar and camera and industrial radar

applications. The device contains two step-down

DC/DC converters, and a 5-V boost converter

to support safety critical applications. The device

integrates two voltage monitoring inputs for external

power supplies and a window watchdog.

The automatic PWM/PFM (AUTO mode) operation

gives high efficiency over a wide output current range

for buck converters. The LP87702-Q1 uses remote

voltage sensing to compensate IR drop between the

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

the accuracy of the output voltage.