Datasheet > LTC2970

LTC2970

更新时间： 2023-12-20 18:46:23

品牌	Logo	应用领域
亚德诺 - ADI		控制器监视器
页数	文件大小	规格书
38页	786K
描述
双通道 I2C 电源监视器和裕度调节控制器

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数据手册

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LTC2970 数据手册

LTC2970/LTC2970-1

Dual I C Power

Supply Monitor and

Margining Controller

FeaTures

DescripTion

TheLTC^®2970isadualpowersupplymonitorandmargin-

Less Than ±±0.5 Total Unadjusted Error 14-Bit DΣ

ingcontrollerwithanSMBuscompatibleI Cbusinterface.

ADC with On-Chip Reference

A low-drift, on-chip reference and 14-bit ΔΣ A/D converter

allow precise measurements of supply voltages, load

currents or internal die temperature. Fault management

allows ALERT to be asserted for configurable overvoltage

and undervoltage fault conditions. Two voltage buffered,

8-bit IDACs allow highly accurate programming of DC/DC

converter output voltages. The IDACs can be configured

to automatically servo the power supplies to the desired

voltages using the ADC. The LTC2970-1 adds a tracking

feature that can be used to turn multiple power supplies

on or off in a controlled manner.

Dual, 8-Bit IDACs with 1x Voltage Buffers

Linear, Voltage Servo Adjusts Supply Voltages by

Ramping IDAC Outputs Up/Down

I C Bus Interface (SMBus Compatible)

Extensive, User Configurable Fault Monitoring

On-Chip Temperature Sensor

Available in 24-Pin 4mm × 5mm QFN Package

applicaTions

Dual Power Supply Voltage Servo

Monitoring Supply Voltage and Current

The bus address is set to 1 of 9 possible combinations by

pin strapping the ASEL0 and ASEL1 pins. The LTC2970/

LTC2970-1 are packaged in a 24-pin, 4mm × 5mm QFN

package.

Programmable Power Supplies

Programmable Reference

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

Typical applicaTion

Dual Power Supply Monitor and Controller (One of Two Channels Shown)

ADC Total Unadjusted Error

vs Temperature

8V TO 15V

0.50

0.25

16 PARTS MOUNTED ON PCB

0.1µF

12V

OUT

1/2 LTC2970

GPIO_CFG

I+

I–

IN0_BP

IN0_BM

OUT0

ALERT

SCL

DC/DC

I C BUS

SMBUS

COMPATIBLE

CONVERTER

–0.25

SDA

(

)

IN0_AP

ADC VIN = 5V

RUN/SS FB

GPIO_0

REF

LOAD

OUT0

–0.50

–50 –25

25 50 75 100 125 150

TEMPERATURE (°C)

SGND

GND

IN0_AM

29701 TA01b

GND ASEL0 ASEL1

0.1µF

29701 TA01

29701fe

For more information www.linear.com/LTC2970

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