DATASHEET
ISL28025
FN8388
Rev.6.00
Feb 27, 2018
Precision Digital Power Monitor with Real Time Alerts
The ISL28025 is a bidirectional high-side and low-side digital
current sense and voltage monitor with a serial interface. The
device monitors power supply current and voltage, which
provides the digital results along with calculated power. The
ISL28025 provides tight accuracy of less than 0.1% for both
voltage and current monitoring.
Features
• Bus voltage sense range . . . . . . . . . . . . . . . . . . . . . . 0V to 60V
• Voltage gain error. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.05%
• Current gain error. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.05%
• High or low (RTN) side sensing
The V power can either be externally supplied or internally
CC
regulated, which allows the ISL28025 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.
• Bidirectional current sensing
• Auxiliary low voltage input channel
• ∆∑ADC, 16-bit native resolution
• Programmable averaging modes
• Internal 3.3V regulator
An 8-bit voltage DAC enable DC/DC converter output voltage
margining (20 Pin QFN) Fault indication includes Bus Voltage
window and over-current fast fault logic indication. The
ISL28025 includes an integrated temperature sensor for
monitoring.
• Internal temperature sense
• Over-voltage/undervoltage and current fault monitoring with
500ns detection delay
• 8-bit voltage output DAC (20 Pin QFN)
The ISL28025 serial interface is PMBus compatible and
operates down to 1.2V. It draws an average current of just
1.3mA and is available in the space saving 16 ball WLCSP
package. It is also available in a 20 lead QFN 4x4 (1.85SQmm
EPAD) The parts operate across the full industrial temperature
range from -40°C to +125°C.
2
• I C/SMBus/PMBus interface that handles 1.2V supply
2
• 55 I C slave addresses
Applications
• Data processing servers
• DC power distribution
Related Literature
• For a full list of related documents, visit our website
- ISL28025 product page
• Telecom equipment
• Portable communication equipment
• DC/DC and AC/DC converters
• Automotive power
2
• Many I C ADC with alert applications
FROM 1.8V TO 5.5V
GND,
PGND
DAC_OUT
3.3V
Vreg
VCC
(QFN)
PVIN
10µF
LX1
Lo
ISL9110
3.3V
BUCK/
BOOST
ISL28025
VBUS
GND
LX2
VINP
SCL
ADC
16-Bit
VOUT
FB
PG
VINM
AuxV
En
SDA
PMBus
REG
MAP
SMBALERT2
(ECLK WLCSP)
TEMP
SENSE
I2CVCC
SMBALERT1
A0
A1
A2
GPIO/Int
SCL
SDA
MCU
FIGURE 1. TYPICAL APPLICATION CIRCUIT
FN8388 Rev.6.00
Feb 27, 2018
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