LTC2972 datasheet(1/112 Pages) LINER

tên linh kiện	LTC2972

Giải thích chi tiết về linh kiện	2-Channel PMBus Power System Manager Featuring Programmable Power Good Outputs

PDF	112 Pages

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nhà sản xuất	LINER [Linear Technology]

Trang chủ	http://www.linear.com

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LTC2972

1

2972fa

For more information www.linear.com/LTC2972

TYPICAL APPLICATION

FEATURES

DESCRIPTION

2-Channel PMBus Power System Manager

Featuring Programmable Power Good Outputs

TheLTC®2972isa2-channelPowerSystemManagerused

to sequence, trim (servo), margin, supervise, manage

faults, provide telemetry and create fault logs. PMBus

commands support power supply sequencing, precision

point-of-loadvoltageadjustmentandmargining.DACsuse

a proprietary soft-connect algorithm to minimize supply

disturbances.Supervisoryfunctionsincludeoverandunder

voltage and temperature threshold limits for two power

supply output channels as well as over and under voltage

threshold limits for a single power supply input channel.

Programmablefaultresponsescandisablethepowersup-

plies with optional retry after a fault is detected. Faults that

disable a power supply can automatically trigger black box

EEPROM storage of fault status and associated telemetry.

An internal 16-bit ADC monitors two output voltages, two

output currents, two external temperatures, input voltage

and current, and die temperature. Input power, energy,

and output power are also calculated. A programmable

watchdog timer monitors microprocessor activity for a

stalled condition and resets the microprocessor if neces-

sary.Asinglewirebussynchronizespowersuppliesacross

multiple ADI Power System Management (PSM) devices.

Configuration EEPROM with ECC supports autonomous

operation without additional software.

All registered trademarks and trademarks are the property of their respective owners. Protected

by U.S. Patents including 7382303, 7420359, 8648623 and 8920026.

APPLICATIONS

n

Sequence, Trim, Margin and Supervise Two

Power Supplies

n

Manage Faults, Monitor Telemetry

n

PMBus Compliant Command Set

n

Supported by LTpowerPlay® GUI

n

Margin or Trim Supplies to Within 0.25% of Target

n

Monitor Input Current (±1%) and Accumulate Energy

n

Fast OV/UV Supervisors per Channel

n

Coordinate Sequencing and Fault Management

Across Multiple ADI PSM Devices

n

Automatic Fault Logging to Internal EEPROM

n

Operate Autonomously Without Additional Software

n

Configurable Power Good Output Pins

n

Accurate Monitoring of Output Voltage, Output

Current, Temperature, and Input Voltage and Current

n

1.8V to 3.3V I2C/SMBus Serial Interface

n

Connect Directly to Regulator IMON Pins

n

Can Be Powered from 3.3V, or 4.5V to 15V

n

Available in 44-Pin 6mm × 7mm QFN Package

n

Computers and Network Servers

n

Industrial Test and Measurement

n

High Reliability Systems

n

Video and Medical Imaging

DCIN

RSNS

R20

R10

R30

R20

R10

R30

LOAD

VOUT

VFB

VIN

RUN

DC/DC

CONVERTER

VSENSEM1

VDAC1

VOUT_EN1

TSENSE1

AUXFAULTB

VDD33*

IBC

EN

IN

OUT

4.5V ≤ VIBUS ≤ 15V

FAULT

PWRGD

SDA

SCL

ALERTB

CONTROL

PMBus

INTERFACE

*LTC2972 MAY ALSO BE

POWERED DIRECTLY FROM

AN EXTERNAL 3.3V SUPPLY

LTC2972

PG1

ISENSEP0

VSENSEM0

VDAC0

VOUT_EN0

TSENSE0

PG0

NOTE: SOME DETAILS

OMITTED FOR CLARITY

ISENSEM0

ISENSEP1

ISENSEM1

VSENSEP1

VSENSEP0

VDDIO

LOAD

VOUT

VFB

VIN

RUN

DC/DC

CONVERTER

RSNS

2972 TA01a

Closed-Loop Servo Error vs Temperature

80 PARTS SOLDERED DOWN

VIN = 1.0V

TEMPERATURE (°C)

–50

–25

0

25

50

75

100

–0.25

–0.20

–0.15

–0.10

–0.05

0.00

0.05

0.10

0.15

0.20

0.25

2972 TA01b

Số phần tương tự - LTC2972

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