DATASHEET
ISL28023
Precision Digital Power Monitor with Margining
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 V
CC
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.
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.
FN8389
Rev 5.00
March 18, 2016
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
• I
2
C/SMBus/PMBus interface that handles 1.2V supply
Applications
•
•
•
•
•
•
Data processing servers
DC power distribution
Telecom equipment
Portable communication equipment
DC/DC, AC/DC converters
Many I
2
C DAC and ADC with alert applications
Related Literature
AN1955,
“Design Ideas for Intersil Digital Power Monitors”
AN1932,
“ISL28023 Precision Digital Power Monitor
Evaluation Kit”
V
IN
= 4.5V 36V
Vreg_in
V
IN
RSH
Vreg_Out
SMBALERT1
VINP
ISL28023
3.3V
Vreg
VCC
GND
Sync,Comp
VCC,FS,SS
1µF
GND
SW MUX
VIN
Phase
Ext_Temp
Place Diode
Near RSH
A0
A1
VINM
ADC
16-Bit
I
2
C
SMBUS
A2
SCL
VBUS
AUXP
AUXM
mp
AUXV
Lo
ISL85415
0.1µF
BOOT
SDA
SMBALERT2
I2CVCC
PMBus
REG
MAP
R
2
PG
En
FB
DAC OUT
8-Bit
DAC
Temp
Sense
R
1
Vmcu
VOUT = 0.6 +
(0.6 – DAC OUT)
* R2/R1
LOAD
V
IN
GPIO/Int
MCU
GPIO
SCL
SDA
FIGURE 1. APPLICATION DIAGRAM
FN8389 Rev 5.00
March 18, 2016
R_pullUp
R_pullUp
GND
To SMBAlert1
R
3
Page 1 of 55
ISL28023
Table of Contents
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Thermal Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Recommended Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Typical Performance Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Pin Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Communication Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Packet Error Correction (PEC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IC Device Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Global IC Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Primary and Auxiliary Channel Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Measurement Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Threshold Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SMB Alert . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External Clock Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage Margin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
30
30
31
32
32
35
36
38
42
42
SMBus/I
2
C Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Protocol Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
SMBus, PMBus Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Device Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Write Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Read Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Group Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clock Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Signal Integrity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fast Transients. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External Clock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overranging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shunt Resistor Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lossless Current Sensing (DCR). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A Trace as a Sense Resistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
45
46
46
46
47
47
47
48
49
49
50
51
53
Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
About Intersil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Package Outline Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
FN8389 Rev 5.00
March 18, 2016
Page 2 of 55
ISL28023
Block Diagram
GND
VREG_OUT
VCC
DAC (8-BIT)
3.3V
DAC_OUT
INTERNAL
POWER
I2CVCC
LS
LS
SMBCLK
REG
I
2
C
SM BUS
PM BUS
REF
VREG_IN
Temp_V
PRIMARY CH
VBUS
VBUS_S
TEMP
SENSE
SMBDAT
A0
A1
VINP
CM = 0 to 60V
VINM
ADC
16-BIT
16
FIR AND
DIGITAL
LOGIC
A2
REG MAP
OSC
SW MUX
OC
DAC
VIN_M
OV/
TEMP
DAC
CLO CK
UV
DAC
UV_SET
DIV
EXT_CLK
AUXV
AUX CH
AUXP
CM = 0 to VCC
AUXM
ONLY FOR PRI CHL
VIN_P
VBUS_S
OV_TEMP_SET
DIGITAL FILTER
0, 2, 4, 8µ
S
SMBALERT2
SMBALERT1
VBUS_S
Temp_V
OC_SET
FIGURE 2. BLOCK DIAGRAM
Ordering Information
PART NUMBER
(Notes
1, 2, 3)
ISL28023FR12Z
ISL28023FR60Z
ISL28023EVAL1Z
ISL28023EVKIT1Z
NOTES:
1. Add “-T” suffix for 6k unit or “-T7A” suffix for 250 unit Tape and Reel options. Please refer to
TB347
for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte
tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil
Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
3. For Moisture Sensitivity Level (MSL), please see device information page for
ISL28023.
For more information on MSL please see techbrief
TB363.
PART
MARKING
280 23R12Z
280 23R60Z
Evaluation Board
Evaluation Kit
V
BUS
OPTION
(V)
12
60
PACKAGE
(RoHS Compliant)
24 Ld QFN
24 Ld QFN
PKG.
DWG. #
L24.4x4D
L24.4x4D
FN8389 Rev 5.00
March 18, 2016
Page 3 of 55
ISL28023
Pin Configuration
ISL28023
(24 LD QFN)
TOP VIEW
VREG_OUT
19
18 VCC
17 I2CVCC
16 A2
GND
AUXM
AUXV
DAC_OUT
4
5
6
7
SMBCLK
8
SMBDAT
9
NC
10
SMBALERT1
11
SMBALERT2
12
EXT_CLK
15 A1
14 A0
13 GND
VREG_IN
VBUS
VINM
21
VINP
24
NC
GND
AUXP
1
2
3
23
22
20
Pin Descriptions
PIN NUMBER
1, 9, 20
2
3
4
5
6
7
8
10
11
12
13
14
15
16
17
18
19
21
22
23
24
PIN NAME
NC
GND
AUXP
AUXM
AUXV
DAC_OUT
SMBCLK
SMBDAT
SMBALERT1
SMBALERT2
EXT_CLK
GND
A0
A1
A2
I2CVCC
VCC
VREG_OUT
VINM
VINP
VREG_IN
VBUS
TYPE/DIR
N/A
Power
Analog Input
Analog Input
Analog Input
Analog Output
Digital Input
No connect
Ground
Auxiliary port differential input (plus)
Auxiliary port differential input (minus)
Auxiliary port single-ended input
DAC voltage output
SMBus/I
2
C clock input
PIN DEFINITION
Digital Input/Output SMBus/I
2
C data
Digital Output
Digital Output
Digital Input
Power
Digital Input
Digital Input
Digital Input
Power
Power
Power
Analog Input
Analog Input
Power
Power
SMBus Alert1, open-drain output
CPU interrupt signal: It is used as CPU interrupt signal.
External ADC clock input
Ground
SMBus/I
2
C address input
SMBus/I
2
C address input
SMBus/I
2
C address input
I
2
C level shifter power supply. This pin should be connected to VCC pin if level shifter is not used.
Chip power supply
Voltage regulator output, proper decoupling capacitor should be connected to this pin
Current sense minus input
Current sense plus input
Voltage regulator input. This pin should be connected to ground in case voltage regulator is not used.
VBUS voltage sense
FN8389 Rev 5.00
March 18, 2016
NC
Page 4 of 55
ISL28023
TABLE 1. DPM PORTFOLIO COMPARISON - ISL28022 vs ISL28023 vs ISL28025
DESCRIPTION
PART NUMBER
PACKAGE
Temperature Range
0V to 60V Input Range
ADC
+25°C Gain Error
Current Measure LSB Step
+25°C Offset
Primary
Channel
LV Aux
Channel
VBus LSB Step
Differential Shunt Input
Independent Bus Voltage
Differential Shunt Input
Independent Bus Voltage
Low Voltage Bus
High Voltage Bus
External Temperature Sensor Input
HV Internal Regulator (3.3V
OUT
)
Fast OC/OV/UV Alert Outputs
Margin DAC
Internal Temperature Sensor
User Select Conversion Mode/Sample Rate
Peak Min/Max Current Registers
Slave Address Locations
I
2
C Level Translators
PMBus
I
2
C/SMBus
High Speed (3.4MHz) I
2
C Mode
External Clock Input
Power Shutdown Mode
X
X
X
X
16 Addresses
X
4mV
BASIC DIGITAL
POWER MONITOR
ISL28022
MSOP10, QFN16
-40°C to +125°C
0V to 60V
16-bit
0.30%
10µV
75µV
X
X
FULL FEATURE
DIGITAL POWER MONITOR
ISL28023
QFN24
-40°C to +125°C
Opt 1: 0V to 60V
Opt 2: 0V to 16V
16-bit
0.25%
2.5µV
30µV
X
X
X
X
0.25mV
1mV/0.25mV
X
X
2 Outputs
X
X
X
X
55 Addresses
X
X
X
X
X
X
X
X
X
55 Addresses
X
X
X
X
X
X
X
2 Outputs
X
0.25mV
1mV/0.25mV
DIGITAL POWER MONITOR
IN TINY PACKAGE
ISL28025
WLCSP-16
-40°C to +125°C
Opt 1: 0V to 60V
Opt 2: 0V to 16V
16-bit
0.25%
2.5µV
30µV
X
X
FN8389 Rev 5.00
March 18, 2016
Page 5 of 55
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