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LP87322B/D/E/F-Q1 Dual High-Current Buck Converter and Dual Linear Regulator

1 Features

•AEC-Q100 qualified with the following results:

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

ambient operating temperature

•Input voltage: 2.8 V to 5.5 V

•Two high-efficiency step-down DC/DC converters:

–Output voltage: 0.7 V to 3.36 V

–Maximum output current 2 A

–Programmable output-voltage slew rate from

0.5 mV/µs to 10 mV/µs

–2-MHz switching frequency

–Spread-spectrum mode and phase interleaving

for EMI reduction

•Two linear regulators:

–Input voltage: 2.5 V to 5.5 V

–Output voltage: 0.8 V to 3.3 V

–Maximum output current 300 mA

•Configurable general-purpose output signals

(GPO, GPO2)

•Interrupt function with programmable masking

•Programmable power-good signal (PGOOD)

•Output short-circuit and overload protection

•Overtemperature warning and protection

•Overvoltage protection (OVP) and undervoltage

lockout (UVLO)

•28-pin, 5-mm × 5-mm VQFN package with

wettable flanks

SW_B0VIN_B0

VIN_B1

VANA

VIN

FB_B0

VOUT_B0

LOAD

SDA

SCL

nINT

CLKIN (GPO2)

GNDs

EN

GPO

SW_B1

FB_B1

VOUT_B1

LOAD

PGOOD

VOUT_LDO1

VOUT_LDO0

VIN_LDO0

VIN_LDO1

VOUT_LDO0

VOUT_LDO1

Copyright © 2017, Texas Instruments Incorporated

Simplified Schematic

2 Applications

•Automotive head unit and cluster

•Automotive camera module

•Surround view system ECU

•Radar system ECU

•Automotive display

3 Description

The LP87322B/D/E/F-Q1 is designed to meet the

power management requirements of the latest

processors and platforms in automotive camera and

radar applications. The device has two step-down

DC/DC converters, two linear regulators, and two

general-purpose digital-output signals. The device is

controlled by an I

2

C-compatible serial interface and by

an enable signal.

The automatic PWM/PFM (AUTO mode) operation

gives high efficiency over a wide output-current range.

The LP87322B/D/E/F-Q1 supports remote voltage

sensing to compensate IR drop between the regulator

output and the point-of-load (POL), thus improving

the accuracy of the output voltage. In addition, the

switching clock can be forced to PWM mode and

also synchronized to an external clock to minimize the

disturbances.

The LP87322B/D/E/F-Q1 device also supports

programmable start-up and shutdown delays and

sequences including GPO signals synchronized to the

enable signal. During start-up and voltage change,

the device controls the output slew rate to minimize

output voltage overshoot and the in-rush current.

Device Information

(1)

PART NUMBERPACKAGEBODY SIZE (NOM)

LP87322E/F

VQFN (28)5.00 mm × 5.00 mm

LP87322B/D (preview)

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

the end of the data sheet.

Output Current (A)

Efficiency (%)

0.0010.010.112

50

60

70

80

90

100

D002

Vin=3.7V, Vout=1.0V

Vin=3.7V, Vout=1.8V

Vin=3.7V, Vout=2.5V

DC/DC Efficiency vs Output Current

LP87322B-Q1, LP87322D-Q1, LP87322E-Q1, LP87322F-Q1

SNVSAC5A – SEPTEMBER 2017 – REVISED JUNE 2021

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. UNLESS OTHERWISE NOTED, this document contains PRODUCTION

DATA.

Produktspecifikationer