Texas Instruments LP8764-Q1 Bedienungsanleitung

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LP8764-Q1 Four-Phase, 20-A Buck Converter With Integrated Switches

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)

.

.

SW_B1

SW_B2

SW_B3

SW_B4

PVIN_B1

PVIN_B2

VCCA

V

IN

FB_B1

FB_B2

Configurable

multi-phase

1 - 4

Outputs

FB_B3

FB_B4

SCL_I2C1/SCK_SPI

SDA_I2C1/SDI_SPI

nINT

GPIO1...10

GNDs

Copyright © 2019, Texas Instruments Incorporated

VOUT_LDO

VIO

V

IO

PVIN_B3

PVIN_B4

Simplified Schematic

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 step-

down 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 I

2

C-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 output-

current 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.

Device Information

PART NUMBERPACKAGE

(1)

BODY SIZE (NOM)

LP8764-Q1VQFN-HR (32)5.50mm × 5.00mm

(1)For all available packages, see the orderable addendum at

the end of the data sheet.

Outputcurrent(A)

Efficiency(%)

00.511.522.533.544.55

55

60

65

70

75

80

85

90

95

2.2MHz,0.8V

4.4MHz,0.8V

2.2MHz,1.2V

4.4MHz,1.2V

2.2MHz,1.8V

4.4MHz,1.8V

Efficiency vs Output Current (1-phase), V

IN

= 3.3V

LP8764-Q1

SNVSCU6 – NOVEMBER 2024

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

Produktspezifikationen