DATASHEET
ISL28025
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.
The V
CC
power can either be externally supplied or internally
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.
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.
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.
FN8388
Rev.6.00
Feb 27, 2018
Features
• Bus voltage sense range . . . . . . . . . . . . . . . . . . . . . . 0V to 60V
• Voltage gain error. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.05%
• Current gain error. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.05%
• High or low (RTN) side sensing
• Bidirectional current sensing
• Auxiliary low voltage input channel
•
∆∑ADC,
16-bit native resolution
• Programmable averaging modes
• Internal 3.3V regulator
• Internal temperature sense
• Over-voltage/undervoltage and current fault monitoring with
500ns detection delay
• 8-bit voltage output DAC (20 Pin QFN)
• I
2
C/SMBus/PMBus interface that handles 1.2V supply
• 55 I
2
C slave addresses
Applications
• Data processing servers
• DC power distribution
• Telecom equipment
• Portable communication equipment
• DC/DC and AC/DC converters
• Automotive power
• Many I
2
C ADC with alert applications
Related Literature
• For a full list of related documents, visit our website
-
ISL28025
product page
MODE
1µF
VIN
PVIN
10µF
ISL9110
3.3V
BUCK/
BOOST
LX1
Lo
LX2
VOUT
DAC_OUT
(QFN)
DAC (8‐BIT)
GND,
PGND
3.3V
Vreg
VCC
VBUS
ISL28025
Vreg_Out
GND
SCL
SDA
SMBALERT2
(ECLK WLCSP)
I2CVCC
R_pullUp
R_pullUp
VINP
R
SH
VINM
AuxV
LOAD
PG
En
FB
PMBus
REG
MAP
TEMP
SENSE
SMBALERT1
A0
Vmcu
A1
GND
A2
GPIO/Int
SCL
SDA
MCU
FIGURE 1. TYPICAL APPLICATION CIRCUIT
FN8388 Rev.6.00
Feb 27, 2018
I
2
C
SMBUS
ADC
16-Bit
Vreg_in
SW MUX
FROM 1.8V TO 5.5V
Page 1 of 53
ISL28025
Table of Contents
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin Descriptions 16 Ball WLCSP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin Descriptions 20 Lead QFN 4x4 (1.85SQmm EPAD). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Thermal Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Recommended Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Typical Performance Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Functional Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
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 (16 Pin WLCSP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage Margin / DAC_OUT (20 Pin QFN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SMBus/I
2
C Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Protocol Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SMBus and PMBus Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Device Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Write Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Read Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Group Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clock Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Signal Integrity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fast Transients. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External Clock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overranging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shunt Resistor Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A Trace as a Sense Resistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lossless Current Sensing (DCR). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
25
25
26
27
27
30
31
32
37
38
39
39
40
40
41
41
41
42
42
42
43
44
44
47
48
Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Package Outline Drawing WLCSP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Package Outline Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
FN8388 Rev.6.00
Feb 27, 2018
Page 2 of 53
ISL28025
Block Diagram
GND
VREG_OUT
VCC
I2CVCC
LS
LS
DAC (8-BIT)
DAC_OUT
(20 Pin QFN)
3.3V
INTERNAL
POWER
SMBCLK
REG
I
2
C
SM BUS
PM BUS
REF
VREG_IN
{
Temp_V
VBUS_S
PRIMARY CH
VBUS
VINP
TEMP
SENSE
SMBDAT
A0
A1
A2
CM = 0 to 60V
VINM
ADC 16-
BIT
16
FIR AND
DIGITAL
LOGIC
REG MAP
OSC
SW Mux
OC
DAC
VIN_M
VIN_P
OV/
TEMP
DAC
CLOCK
UV
DAC
UV_SET
VBUS_S
OV_TEMP_SET
DIV
EXT_CLK
(16 Pin WLCSP)
SMBALERT2
SMBALERT1
AUXV
DIGITAL FILTER
0, 2, 4, 8µ
S
VBUS_S
Temp_V
OC_SET
ONLY FOR PRI CHL
FIGURE 2. BLOCK DIAGRAM
Ordering Information
PART NUMBER
ISL28025FR12Z (Notes
3, 4)
ISL28025FR12Z-T (Notes
1, 3, 4)
ISL28025FR12Z-T7A (Notes
1, 3, 4)
ISL28025FI12Z-T (Notes
1, 2, 3)
ISL28025FI12Z-T7A (Notes
1, 2, 3)
ISL28025FI60Z-T (Notes
1, 2, 3)
ISL28025FI60Z-T7A (Notes
1, 2, 3)
ISL28025EVKIT1Z
ISL28025EVAL1Z
NOTES:
1. Refer to
TB347
for details on reel specifications.
2. These Pb-free WLCSP packaged products employ special Pb-free material sets; molding compounds/die attach materials and SnAgCu - e1 solder ball
terminals, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free WLCSP packaged 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), see the product information page for the
ISL28025.
For more information on MSL, see
TB363.
4. These 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 P-free requirements of IPC/JEDEC J STD-020.
PART
MARKING
280 25R12Z
280 25R12Z
280 25R12Z
2512
2512
2560
2560
Evaluation Kit
Evaluation Board
V
BUS
OPTION
(V)
12
12
12
12
12
60
60
TAPE AND REEL
(UNITS)
-
6k
250
3k
250
3k
250
PACKAGE
(RoHS Compliant)
20 lead QFN 4x4 (1.85SQmm EPAD)
20 lead QFN 4x4 (1.85SQmm EPAD)
20 lead QFN 4x4 (1.85SQmm EPAD)
16 Ball WLCSP
16 Ball WLCSP
16 Ball WLCSP
16 Ball WLCSP
PKG. DWG. #
L20.4x4J
L20.4x4J
L20.4x4J
W4x4.16C
W4x4.16C
W4x4.16C
W4x4.16C
FN8388 Rev.6.00
Feb 27, 2018
Page 3 of 53
ISL28025
Pin Configuration
ISL28025
TOP VIEW
ISL28025FI -- 16 Pin (BALL) 0.5mm PITCH WLCSP
1
VREG _O UT
A
2
VINM
3
VINP
4
VBUS
ISL28025FR --
20 lead QFN 4x4 (1.85SQmm EPAD)
VREG_OUT
17
VREG_IN
VINM
VINP
20
I2CVCC
B
VC C
VREG _IN
AUXV
19
18
16
15 I2CVCC
14 A2
VBUS
GND
AUXV
1
2
3
4
5
6
SMBCLK
7
SMBDAT
8
NC
9
SMBALERT1
10
SMBALERT2
1.85SQmm
EPAD
VCC
13 A1
12 A0
11 GND
A0
C
A1
A2
SM BCLK
DAC_OUT
SM BALE RT2/
ECLK
NC
SM BALERT 1
SM BDAT
G ND
D
Pin Descriptions 16 Ball WLCSP
16 PIN
WLCSP
A1
A2
A3
A4
B1
B2
B3
B4
C1
C2
C3
C4
D1
D2
D3
D4
PIN NAME
VREG_OUT
VINM
VINP
VBUS
I2CVCC
VCC
VREG_IN
AUXV
A0
A1
A2
SMBCLK
GND
Power
Analog Input
Analog Input
Power
Power
Power
Power
Analog Input
Digital Input
Digital Input
Digital Input
Digital Input
Power
TYPE/DIR
PIN DEFINITION
Voltage regulator output. Connect a proper decoupling capacitor to this pin
Current sense minus input
Current sense plus input
VBus voltage sense
I
2
C level shifter power supply. Connect this pin to the VCC pin if level shifters are not used
Chip power supply
Voltage regulator input. Connect this pin to ground if a voltage regulator is not used
Auxiliary port single-ended input
I
2
C address input
I
2
C address input
I
2
C address input
SMBus/I
2
C clock input
Ground
External ADC clock input or CPU interrupt signal. It is used as a CPU interrupt signal only when
this pin is not configured as external clock input
SMBus Alert1, open collector output
SMBus/I
2
C data
SMBALERT2/ECLK Digital Input/Output
SMBALERT1
SMBDAT
Digital Output
Digital Input
FN8388 Rev.6.00
Feb 27, 2018
Page 4 of 53
ISL28025
Pin Descriptions
20 Lead QFN 4x4 (1.85SQmm EPAD)
PIN NUMBER
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
EPAD
PIN NAME
VBUS
GND
AUXV
DAC_OUT
NC
SMBCLK
SMBDAT
NC
SMBALERT1
SMBALERT2
GND
A0
A1
A2
I2CVCC
VCC
VREG_OUT
VINM
VINP
VREG_IN
NEG
TYPE/DIR
Power
Power
Analog Input
Analog Output
Float
Digital Input
VBUS voltage sense
Ground
Auxiliary port single-ended input
DAC voltage output
No Connection
SMBus/I
2
C clock input
PIN DEFINITION
Digital Input/Output SMBus/I
2
C data
Float
Digital Output
Digital Output
Power
Digital Input
Digital Input
Digital Input
Power
Power
Power
Analog Input
Analog Input
Power
SUBSTRATE
No Connection
SMBus Alert1, open-drain output
CPU interrupt signal
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. Connect this pin to the VCC pin if a level shifter is not used
Chip power supply
Voltage regulator output. Connect a proper decoupling capacitor to this pin
Current sense minus input
Current sense plus input
Voltage regulator input. Connect this pin to ground if a voltage regulator is not used
GND or most negative voltage
FN8388 Rev.6.00
Feb 27, 2018
Page 5 of 53
Embedded System
京公网安备 11010802033920号
EEWORLD
