Texas Instruments LP875701-Q1 Handleiding

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LP875701-Q1 Four-Phase 3-MHz 1-V 10-A DC/DC Buck Converter With Integrated

Switches

1 Features

•Qualified for Automotive Applications

•AEC-Q100 Qualified With the Following Results:

–Device Temperature Grade 1: –40°C to +125°C

Ambient Operating Temperature

–Device HBM ESD Classification Level 2

–Device CDM ESD Classification Level C4B

•Input Voltage: 2.8 V to 5.5 V

•Output Voltage: 1.0 V

•Four High-Efficiency Step-Down DC/DC Converter

Cores:

–Maximum Output Current: 10 A (2.5 A per

Phase)

•Switching Frequency: 3 MHz

•Spread-Spectrum Mode and Phase Interleaving

•Configurable General Purpose I/O (GPIOs)

•I

2

C-Compatible Interface That Supports Standard

(100 kHz), Fast (400 kHz), Fast+ (1 MHz), and

High-Speed (3.4 MHz) Modes

•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)

2 Applications

•Automotive Infotainment

•Cluster

•Radar

•Camera Power Applications

3 Description

The LP875701-Q1 device is designed to meet

the power-management requirements of the latest

processors and platforms in various automotive power

applications. The device contains four step-down

DC/DC converter cores, which are configured as a

4-phase output in forced-PWM mode. The device is

controlled by an I

2

C-compatible serial interface and by

enable signals.

The LP875701-Q1 supports remote differential-

voltage sensing for multiphase outputs to compensate

IR drop between the regulator output and the point-of-

load (POL) which improves the accuracy of the output

voltage. The switching clock can be forced to PWM

mode and also synchronized to an external clock to

minimize the disturbances.

The LP875701-Q1 device supports load-current

measurement without the addition of external current-

sense resistors. The LP875701-Q1 device also

supports programmable start-up and shutdown delays

and sequences synchronized to enable signals. The

sequences can also include GPIO signals to control

external regulators, load switches, and processor

reset. During start-up , the device controls the output

slew rate to minimize output-voltage overshoot and

in-rush current.

Device Information

(1)

PART NUMBERPACKAGEBODY SIZE (NOM)

LP875701-Q1VQFN-HR (26)4.50 mm × 4.00 mm

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

the end of the data sheet.

SW_B0

SW_B1

SW_B2

SW_B3

VIN_B0

VIN_B1

VIN_B2

VIN_B3

VANA

V

IN

FB_B0

FB_B1

V

OUT

LOAD

FB_B2

FB_B3

NRST

SDA

SCL

nINT

CLKIN

GNDs

EN1 (GPIO1)

EN2 (GPIO2)

EN3 (GPIO3)

PGOOD

Copyright © 2017, Texas Instruments Incorporated

Simplified Schematic

Current (A)

Efficiency (%)

0.010.1110

40

50

60

70

80

90

100

D140

V

IN

= 3.3 V

V

IN

= 5.0 V

Efficiency vs Output Current

LP875701-Q1

SNVSA05A – DECEMBER 2019 – REVISED AUGUST 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.

Product specificaties