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LP876242-Q1 Four 8.8-MHz Buck Converters for AWR and IWR MMICs

1 Features

•AEC-Q100 Qualified with the following results:

–Input voltage: 3.0 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: 0.9 V to 1.9 V

–Maximum output current: 4/3/3/2 A

–Programmable output voltage slew-rate: 0.5

mV/µs to 33 mV/µs

–Switching frequency: 8.8 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

PVIN_B1

PVIN_B2

VCCA

V

IN

FB_B1

FB_B2

VOUT1

FB_B3

FB_B4

SCL_I2C1/SCK_SPI

SDA_I2C1/SDI_SPI

nINT

GPIO1...10

GNDs

Copyright © 2021, Texas Instruments Incorporated

VOUT_LDO

VIO

V

IO

PVIN_B3

PVIN_B4

SW_B4

VOUT2

VOUT3

VOUT4

Simplified Schematic

2 Applications

•Imaging radar using cascaded configuration

•Long range radar

•Radar module without processing

3 Description

The LP876242-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, generating

four 1-phase outputs. The device settings can be

changed by I

2

C-compatible serial interface or by a

SPI serial interface.

The switching clock is 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.

The LP876242-Q1 device includes protection and

diagnostic mechanisms such as register and interface

CRC, short-circuit protection, thermal monitoring, and

shutdown. The LP876242-Q1 device can notify the

processor of these events through the interrupt

handler, allowing the processor to take action in

response.

Device Information

(1)

PART NUMBERPACKAGEBODY SIZE (NOM)

LP876242-Q1VQFN-HR (32)5.50 mm × 5.00 mm

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

the end of the data sheet.

Output Current (A)

Efficiency (%)

0.010.020.050.10.20.30.50.7123455

10

20

30

40

50

60

70

80

90

100

1-ph, Vin=3.3V, Vout=1V

1-ph, Vin=3.3V, Vout=1.2V

1-ph, Vin=3.3V, Vout=1.8V

Efficiency vs Output Current (1-phase)

LP876242-Q1

SNVSC07A – JUNE 2021 – REVISED SEPTEMBER 2022

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.

Produktspecifikationer