LP876411B4RQKRQ1屬于集成電路（IC）的穩(wěn)壓器-DC-DC開(kāi)關(guān)穩(wěn)壓器。由美國(guó)德州儀器公司制造生產(chǎn)的LP876411B4RQKRQ1穩(wěn)壓器 - DC-DC 開(kāi)關(guān)穩(wěn)壓器DC-DC 開(kāi)關(guān)穩(wěn)壓器 PMIC（電源管理集成電路）產(chǎn)品族中的產(chǎn)品是元器件級(jí)設(shè)備，用于需要穩(wěn)定 DC 輸入電壓和/或?qū)⑵滢D(zhuǎn)換為不同幅度的輸出電壓的應(yīng)用。這些器件與稱為“控制器”P(pán)MIC 的類似產(chǎn)品的區(qū)別在于集成了主開(kāi)關(guān)元件，設(shè)備提供的電力會(huì)通過(guò)該元件。

1 Features

? AEC-Q100 Qualified with the following results:

– Input voltage: 2.8 V to 5.5 V

– Device temperature grade 1: –40°C to +125°C

ambient operating temperature range

– Device HBM ESD classification Level 2

– Device CDM ESD classification Level C4B

? Functional Safety-Compliant

– Developed for functional safety applications

– Documentation available to aid ISO 26262

system design up to ASIL-D

– Documentation available to aid IEC 61508

system design up to SIL-3

– Systematic capability up to ASIL-D

– Hardware integrity up to ASIL-D

– Windowed voltage and over-current monitors

– Watchdog with selectable trigger / Q&A mode

– Level or PWM error signal monitoring (ESM)

– Thermal monitoring with high temperature

warning and thermal shutdown

– Bit-integrity (CRC) error detection on

configuration registers and non-volatile memory

? 4 high-efficiency step-down DC/DC converters:

– Output voltage: 0.3 V to 3.34 V (0.3 V to 1.9 V

for multi-phase outputs)

– Maximum output current: 5 A per phase, up to

20 A with 4-phase configuration

– Programmable output voltage slew-rate: 0.5

mV/μs to 33 mV/μs

– Switching frequency: 2.2 MHz or 4.4 MHz

? 10 configurable general purpose I/O (GPIO)

? SPMI interface for multi-PMIC synchronization

? Input overvoltage monitor (OVP) and undervoltage

lockout (UVLO)

2 Applications

? Advanced driver assistance systems (ADAS)

? Front camera

? Surround view system ECU

? Long range radar

? Sensor fusion

? Domain controller

3 Description

The LP8764-Q1 device is designed to meet the power

management requirements of the latest processors

and platforms in various safety-relevant automotive

and industrial applications. The device has four stepdown

DC/DC converter cores, that are configurable

for five different phase configurations from one 4-

phase output to four 1-phase outputs. The device

settings can be changed by I2C-compatible serial

interface or by a SPI serial interface.

The automatic PFM/PWM (AUTO mode) operation

together with the automatic phase adding and phase

shedding maximizes efficiency over a wide outputcurrent

range. The LP8764-Q1 device supports

remote differential voltage sensing for multiphase

outputs to compensate IR drop between the regulator

output and the point-of-load (POL) that improves the

accuracy of the output voltage. The switching clock

can be forced to PWM mode and the phases are

interleaved. The switching can be synchronized to

an external clock and spread-spectrum mode can be

enabled to minimize the disturbances.