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LP87332D Dual High-Current Buck Converter and Dual Linear Regulator

1 Features

•Device operating temperature range: –40°C to

+125°C ambient 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 3 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

•Industrial applications

3 Description

The LP87332D is designed to meet the power

management requirements of the latest processors

and platforms in industrial 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 LP87332D 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 LP87332D device supports load-current

measurement without the addition of external current-

sense resistors. The LP87332D device also supports

programmable start-up and shutdown delays and

sequences including GPO signals synchronized to

the enable signal. A second GPO signal is available

with pin multiplexing of CLKIN pin, if external clock

is not needed. 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)

LP87332DVQFN (28)5.00 mm × 5.00 mm

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

the end of the data sheet.

Output Current (A)

Efficiency (%)

0.0010.010.113

50

60

70

80

90

100

D001

Vin=3.7V, Vout=1.0V

Vin=3.7V, Vout=1.8V

Vin=3.7V, Vout=2.5V

DC/DC Efficiency vs Output Current

LP87332D

SNVSAU6A – NOVEMBER 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. PRODUCTION DATA.

Produktspecifikationer