ISL28023FR12Z View Datasheet(PDF) - Intersil

Part Name

Description

Manufacturer

ISL28023FR12Z

Precision Digital Power Monitor with Margining / 24 Ld QFN Package

Intersil 

DATASHEET

Precision Digital Power Monitor with Margining

ISL28023

The ISL28023 is a bidirectional high-side and low-side digital

current sense and voltage monitor with a serial interface. The

device monitors power supply current, voltage and provides

the digital results along with calculated power. The ISL28023

provides tight accuracy of 0.05% for both voltage and current

monitoring. The auxiliary input provides an additional power

monitor function.

The VCC power can either be externally supplied or internally

regulated, which allows the ISL28023 to handle a

common-mode input voltage range from 0V to 60V. The wide

range permits the device to handle telecom, automotive and

industrial applications with minimal external circuitry.

An 8-bit voltage DAC enables a DC/DC converter output

voltage margining. Fault indication includes a Bus Voltage

window and overcurrent fast fault logic indication. A

temperature sensing option includes both internal

temperature sensor and a bias/monitor circuit for external

diode sensing.

The ISL28023 serial interface is PMBus compatible and

operates down to 1.2V voltage. It draws an average current of

just 800µA and is available in the space saving 24 Ld QFN

4mmx4mm package. The part operates across the full

industrial temperature range from -40°C to +125°C.

Related Literature

AN1955, “Design Ideas for Intersil Digital Power Monitors”

Features

• Bus voltage sense range . . . . . . . . . . . . . . . . . . . . . . 0V to 60V

• Voltage gain error. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.05%

• Current gain error. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.05%

• Internal temperature sensor accuracy . . . . . . . . . . . . +1.0°C

• High or low (RTN) side sensing

• Bidirectional current sensing

• Auxiliary low voltage channel

• ∆∑ADC, 16-bit native resolution

• Programmable averaging modes

• Internal 3.3V regulator

• Internal temperature sense

• Overvoltage/undervoltage and current fault monitoring with

500ns detection delay

• 8-bit voltage output DAC

• I2C/SMBus/PMBus interface that handles 1.2V supply

• 55 I2C slave addresses

Applications

• Data processing servers

• DC power distribution

• Telecom equipment

• Portable communication equipment

• DC/DC, AC/DC converters

• Many I2C DAC and ADC with alert applications

June 17, 2015

FN8389.4

VIN = 4.5V 36V

VIN

RSH

SMBALERT1

VINP

ISL28023

3.3V

Vreg

VIN

ISL85415

Ext_Temp

Place Diode

Near RSH

Phase

Lo

0.1µF

BOOT

R2

PG

En FB

R3

To SMBAlert1

VINM

VBUS

AUXP

AUXM

AUXV

DAC OUT

R1

VOUT = 0.6 +

(0.6 – DAC OUT)

* R2/R1

VIN

GPIO

ADC

16-Bit

PMBus

REG

MAP

8-Bit

DAC

Temp

Sense

MCU

GPIO/Int

SCL

SDA

VCC

GND

A0

A1

A2

SCL

SDA

SMBALERT2

I2CVCC

FIGURE 1. APPLICATION DIAGRAM

1

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

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Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.

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