Industrial Process Control

Report
INDUSTRIAL
PROCESS
CONTROL
SOLUTIONS
SIMPLY SMARTER™
Industrial Solutions: Introduction
Purpose
• Introduce Intersil solutions for industrial control applications
Objectives
• Overview of industrial control systems
• Review typical industrial control block
• Overview of industrial sensors
• Present Intersil feature products with select application circuits
2
Industrial Process Control
Programmable Controller
Basic Process Control
• PLC: Programmable Logic Controller
• PAC: Programmable Automation
Controller
Networked Control System
CANopen Master Module
LCD Display Unit
Power Supply
• DCS: Distributed Control System
• SCADA: Supervisory Control and Data
Acquisition
Integrated Process Control
• PAS: Process Automation System
• CPAS: Collaborative Process
Automation System
Servo Drive
Servo Drive
Broad coverage across
Intersil’s product portfolio
•
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•
•
•
•
•
•
Op amps
Data converters
Switches and multiplexers
RS-485/422 interfaces
Voltage references
Digital potentiometers (DCPs)
Real time clocks
Switching and linear regulators
Isolated power
Voltage monitoring
Distributed I/Os
Power Supply
Sensors
3
PLC/DCS Industrial Control Elements
I/O intensive
• 1 to 256 digital or analog input and output cards per
control module
Analog input sensor modules
• Temperature, pressure, flow, vibration, position, torque,
motion, power, motors, lighting
Output modules
• Valves, switches, process control set-points, motor
drives velocity and position, power and safety controls,
lighting
Communication
• Fieldbus, Profibus, HART, Modibus, Ethernet, BACnet,
and more
• RS485, RS422 built ports common to most systems
Power
• Core micro and digital I/O power
• Multiple voltage sources – analog modules, subsystem
4
Common Analog Needs
High Precision
• Low Drift, Low Noise’
• High Resolution
High Density/Low Power
• High channel count
• Small Packaging
Flexible Power Sources
Industrial Control: Intersil Products Overview
Intersil Solutions for Industrial Control Applications
Sensor Modules
Temperature
Sensors
Gain Amplifiers
Active Filters
+V
Force or
Strain
Sensors
Current
1 of n ADC
+V
Pressure
Flow
Sensors
Precision
Amps
-V
MUX
Precision
Amps
-V
Instrumentation
DG408 8:1 MUX
40V Op Amps
Amps
5V Op Amps
DG409 Diff 4:1 MUX
ISL28210
EL8170/8173
ISL28276
ISL28217
ISL28133 / 233 ISL28210
ISL28207
ISL28217
ISL28134
ISL28127
(3 amps discrete)
ISL28214
ISL28218
ISL28208
Microcontroller
ADC
VOLTAGE
REFERENCE
ISL21009
ISL21090
V
System Power
Digital Potentiometers
ISL223x4 ISL224x4
ISL223x6, ISL22317
ISL96017, ISL95811
Actuators
Motors
Control loops
4-20mA
FET drive
V
ANALOG SIGNAL OUTPUT MODULE
Precision Amps
ISL28133, ISL28217
5
LDO
Buffer, Filters, Span Drivers
+V
Precision
Amps
-V
40V Op Amps
ISL28217
ISL28207
ISL28127
ISL28218
ISL28208
FET Drivers
+V
Precision
Amps
-V
5V Op Amps
ISL28276
ISL28133/233 /433
ISL28134
ISL28214
PWM Control
1 of n DAC
MUX
4:1 MUX
DG408
DG409
V
Switching
Regulator
SW
Controller
PWM Controllers
ISL8107, ISL6420, ISL8112 &
ISL6441
LDO
ISL80101, ISL80111
Power monitor
ISL88011, ISL88041
Power sequencer
ISL8700, ISL8705A
DAC
Voltage
Reference
ISL21009
ISL21090
Isolated Controllers
ISL6842, ISL6721
Switching Regulators
ILS85033, ISL8022, ISL8088
System
Power
Compensation
Voltage Reference
ISL21060, ISL21009
ISL60002, ISL21090
Voltage
Monitors
& Watchdog
Core & I/O
Power
Vibration
Sensor
RS232 / RS485
RS-485
ISL317xE, 3.3V Dual Protocol
ISL314xE, 5V ISL81334, 5V 2 ch
Interface
ISL41334, 5V 2 ch
RS-232
RS-232
RS-485
ISL4221EIRZ ISL81387, 5V 1 ch
ISL3232EIRZ ISL41387, 5V 1 ch
ISL3330, 3.3V 1 ch
ISL4243EIRZ
ISL3331, 3.3V 1 ch
RTC
ISL3332, 3.3V 2 ch
ISL3333, 3.3V 2 ch
RTC
ISL12022, ISL12023
ISL12020M. ISL12022M
ISL12057 , ISL12058, ISL12059
CONTROL MODULE
ANALOG SIGNAL INPUT MODULE
Power
Isolated
Power
Isolated
Power
Sensor Amplifier Electrical Environment
Get more useful ADC bits by:
• Minimizing output noise
• Minimizing output DC offset and drift
• Maximizing output voltage swing
Input differential disturbances come from:
• Electrical imbalances within the sensor
• External transient sources
• Externally coupled and internal sensor noise sources
Signal
Sensor
Amp
Filter
Amp
ADC
Precision VREF
Power
Supply
Input common mode disturbances come from:
• Sensor contact with conductive surfaces
• External transient sources
• Earth ground disturbances
6
Sensor Amplifier Bandwidth Range
100MHz
20kHz - 2MHz Piezo
Ultrasound
Sonar Ranging
Fetal Imaging
1MHz
High Speed
Photodiode
Bar Code Scanner
Magnetic Stripe
Transducer
Card Readers
Frequency
10KHz
100Hz
1Hz
0.1Hz
DC
7
Skin
Electrode
ECG/EEG
Temperature
PTC
Thermocouple
Electro
Chemical
pH Probes
Photodiode
Smoke
Detection
Position
Piezo
Absolute
Pressure
Sensors
Weigh Scale
Infusion Pump
Piezo Pressure
Sensors
Blood Pressure
Muscle/Bone
injury
Sensor Module Overview
Sensor modules measure a wide range of physical phenomenon
Sensor and application accuracy requirements can vary significantly
Amplifier selection is critical to achieving performance
Physical
Sensor Type
Measure
Impedence
Amplifier
Technology
Physical
Sensor Type
Measure
Impedence
Amplifier
Technology
Thermocouple
Voltage
Low
Bipolar
Current
Hi / Lo
Current Shunt
Voltage
Low
Bipolar
Resistance
Resistance
Voltage
Low to Med Bipolar
Low to High JFET, CMOS
Bipolar
Low
Low
High
Low
Bipolar
JFET, CMOS
Bipolar
IR Thermal Sensor
Current
High
JFET, CMOS
Low
Bipolar
Thermo Pile
Voltage
Low
Bipolar
AC Voltage
Charge, Voltage
Voltage
Voltage, Current
Resistance
Voltage
Low
Bipolar
Resistance
Resistance
Voltage, Resistance
Charge, Voltage
Low
Low to Med
Low to Med
High
Bipolar
Bipolar
Bipolar
JFET, CMOS
Charge
Resistance
Charge, Voltage
Charge
High
Med
High
High
JFET, CMOS
JFET, CMOS
JFET, CMOS
JFET, CMOS
Colorimeter (Photodiode) Charge
High
JFET, CMOS
Charge
High
JFET, CMOS
RTD
Thermister
Temperature
Silicon
Load Cell / Bridge
Force /Weight Strain Guage
Mechanical Diaphram
Pressure
Piezeo Electric
Flow
8
Motion,
Vibration
LVDT
Piezeo Electric
Microphone
Motor Sensor
Accelorometers
Ph Electrode
Solution Conductivity
Chemical CO Sensor
Turbidity (Photodiode)
Differential Pressure
Voltage, Resistance Low to Med Bipolar
Mass Flow (Temp)
Resistance
Low
Bipolar
Light / IR Photodiode
Hot Wire Annometer
Magnetic Flow
Resistance
AC Voltage
Low
Low
Bipolar
Bipolar
Humidity
Moisture / Capacitance
Infrared detector
Capacitance
Charge
High
High
JFET, CMOS
JFET, CMOS
Ultrasound Doppler
Mechanical Turbine
Frequency
Voltage
Med
Low
Bipolar
Bipolar
Magnetic
Hall Effect
Magneto Resistive
Voltage
Resistance
Low
Low, Med
Bipolar
Bipolar
How Do You Select the Right Amplifier?
Indentify Global Priorities
1. Price, package, performance
2. New requirement or 2nd source?
3. Decision process - timing
Sensor Characteristics?
Output Voltage Range
Output Current Range
Sensor Resistance
Sensor Capacitance
Supply Voltage, Bias
Requirements
Amplifier Input Signal?
Voltage or Current
Amplitude, Frequency
Signal to Noise,
Temperature Drift
Bias Voltage
Ground Sensing
Positive Rail Sensing
9
V+
+
V-
Supply Voltage Requirement?
Dual Supply ±2.5V, ±5V, ±10V, ±15V, ±20V?
Single Supply 1.8V, 3V, 5V, 10V, 15V, 30V?
Power Level Battery, Line Power, Micro Power?
Output Requirements?
Accuracy, Noise, Drift
Rload, Cload,
Vout or Iout
Frequency, Amplitude
Settling Time, THD
Rail to Rail
Keys to Success
1. Learn as much possible about the application and
amplifier requirements
2. Use the offline selector tool or the selection guide to
narrow the selection to a small list of 3-5 amplifiers
(http://www.intersil.com/products/odst/)
3. Identify priority tradeoffs and finalize the selection
Broad Portfolio of Precision Op Amps
for Sensor Frontends
End
Application
Sensor
Sensor Characteristics
Op Amp Requirements
Recommended Amplifiers
Temperature
Measurement
Thermocouple
Resistance
Thermometer (RTD)
Thermo PIle
Low signal voltage
Low impedance
Low signal bandwidth
Low Vos and drift
High open loop gain
Moderate input Impedance
Slew rate & bandwidth not
critical
ISL28133, ISL28233 Low Power 5V Chopper
ISL28134 Low Noise 5V Chopper
ISL28176, ISL28276 5V Op Amps
ISL28107, ISL28207 Low Ibias 40V Op Amps
ISL28117, ISL28217 Low Power 40V Op Amps
ISL28108, ISL28208 Rail-Rail Out 40V Op Amps
Pressure,
Force, Flow
Measurement
Strain Gage, Load
Cell
Low signal voltage
Low impedance (100 - 5000W)
Low signal bandwidth (~ 1kHz)
Low Vos and drift
High open loop gain, CMRR
Moderate bandwidth
ISL28118, ISL28218 Rail-Rail Out 40V Op Amps
ISL28127, ISL28227 Low Noise 40V Op Amps
ISL28117, ISL28217 Low Power 40V Op Amps
EL8171/72, ISL28270/72 5V Rail-Rail In-amps
Ultrasonic
Vibration
Measurement
Motion , Vibration
Piezo-electric
Sensor
Medium signal voltage
AC coupled, high impedance
Signal bandwidth (~100kHz)
High input impedance
Low input Ibias, low noise
Low input capacitance, Cin
High bandwidth
Moderate open loop gain
ISL28210 Low Noise JFET Op Amp
ISL28107, ISL28207 Low Ibias 40V Op Amps
ISL28138 High BW CMOS Op Amp
ISL28114, ISL28214 Low Cost CMOS Op Amps
Position
Measurement
Light Photodiode
(Photovoltaic)
Low signal voltage
High impedance
Signal bandwidth (~10kHz)
Very high input impedance
Low input Ibias, low noise
Low input capacitance, Cin
High bandwidth
ISL28210 Low Noise JFET Op Amp
ISL28138 High BW CMOS Op Amp
Chemical
Ph Electrode
Medium signal voltage
High impedance (500MW)
Low signal bandwidth
High input impedance
Low input Ibias, low noise
Low input capacitance, Cin
Moderate open loop gain
ISL28210 Low Noise JFET Op Amp
ISL28107, ISL28207 Low Ibias 40V Op Amps
ISL28138 High BW CMOS Op Amp
ISL28114, ISL28214 Low Cost CMOS Op Amps
Magnetic
Hall Effect Magneto
Resistive
Low signal voltage
Low impedance (100 -5000W)
Moderate signal bandwidth
Low Vos and drift
High open loop gain, CMRR
Moderate bandwidth
ISL28118, ISL28218 Rail-Rail Out 40V Op Amps
ISL28127, ISL28227 Low Noise 40V Op Amps
ISL28117, ISL28217 Low Power 40V Op Amps
EL8171/72, ISL28270/72 5V Rail-Rail In-amps
10
Precision Low Noise JFET Op Amp
ISL28210: Superior Ibias and Noise Performance
Competitive Summary
Mfg
Max
Ibias
(pA)
Differential
Input
Capacitance
(pF)
Noise
@ 1kHz
(nV/Hz)
Noise
0.1 – 10Hz
(nVP-P)
BW
(MHz)
Min
SR
(V/µs)
Max
VOS
(µV)
Max
IS
(mA)
ISIL
2
8.3
6
580
12.5
20
300
2.9
Comp A
75
12.5
8
2400
8
20
900
2.3
Comp B
50
4
13
2100
8
20
600
2.5
Comp C
10
8
6
1800
25
40
100
3
Comp D
50
1
8
**
5
14
500
4.8
ISL28210 Input Bias Current (Max)
Ibias (pA)
10000
ISL28210 Input Bias Current (Max)
Applications
• Flow sensors and other high
impedance applications
• Medical instrumentation
• Active filter blocks
• Precision instruments
Outstanding Noise Performance
10x
Better
1000
100
10
1
Competitor A
Competitor B
25C
11
Typical Application:
Photodiode
60C
85C
Competitor C
125C
ISL28210
300 fA (typ)
pH Sensor Equivalent Circuit
Reference
Electrode
+
Potassium
Chloride
Solution
Silver
Chloride Tip
Very High Input
Impedance
ISL28210 is an
excellent op amp for
high impedance
sensor applications
-
Measurement
Electrode
Sensor Sensitivity & Range
• pH range 1 to 14
• Voltage output: 59.16mV/pH
• pH neutral (7) = 0V
• Sensor output range: -414mV to +414mV
• Source impedance ~ 400MW
Amplifier Requirements
• Gain = VOUT swing/818mV (~ 12 for 10V output)
• Input bias current of 10pA or less = 1% measurement error
• VOS < 0.5mV < 0.1%
• OPA best for 2-terminal integrated sensor or INA
• INA best for 3-terminal remote sensor w/ground shield
In spite of simplicity, pH sensor probes have many
sensitivities including temperature, contamination and aging
12
Low Noise, High Voltage Instrumentation Amp
Using JFET Precision Op Amps
Roll Your Own High Performance Instrumentation
Amplifier Using High Voltage Precision Op Amps
ISL28210
ISL28207
For high impedance sensors it is
desirable to maintain the input
characteristics of high end
amplifiers
ISL28127
ISL28117
Hi Z
Vout
Sensor
ISL28210
ISL28207
Process control applications in noisy
environment often require
differential measurements
This often results in a “roll their
own” instrumentation amplifiers
using select high performance
precision amplifiers
The advantage is the user has a
great deal of flexibility in achieving
the desired performance and cost
tradeoffs
ISL21090
ISL21009
The disadvantage is CMRR is limited
by the matching of the resistors
Intersil’s new 40V precision
amplifiers are excellent choices for
these applications
13
Micropower, Chopper Stabilized, RRIO Op Amps
ISL28233 & ISL28433: Best-in-Class Performance for Precision and Drift on Extremely Low Power
Competitive Summary
Mfg
Max Is
(µA)
Max
Vos (µV)
TCVos
(nV/C)
Max
Ibias (pA)
Noise 0.1 to
10Hz (µVp-p)
Min BW
(kHz)
ISL28233
25
6
50
180
1.0
400
Comp A
25
10
50
200
1.1
350
Comp B
17
15
100
50
1.96
115
Features
• 1.65V to +6.0V single supply range
• -40°C to +125°C temperature range
• Rail-to-Rail inputs and output
Applications
• Pressure measurement
• Electronic weigh scales
• Precision/strain gauge sensors
• Precision regulation
• Low ohmic current sense
• Bi-directional current sense
• High gain analog front ends
ISL28233 Long Term Drift
Zero Drift
14
Typical Application:
Temperature
Measurement
Low Noise at Low Power
Temperature Sensors
Temperature is the most widely measured parameter in
Industrial Controls
• The four most common types are Thermocouple, RTD, Thermistor and Integrated
Circuits
• Each sensor has different characteristics and care must be taken to select the
appropriate sensor for a given application
• In all cases calibration is needed and the accuracy will be dependent on the sensor
conditioning circuit
Sensors
Temp
Range (°C)
Typical
Applications
15
Thermocouple
RTD
Termistor
-270 to +1800
-250 to +900
Integrated Silicon
-100 to +450
-55 to +150
High temperature
Bridge temperature
Bridge Temperature
Computers
Chemical reactions
Calibration
Pyrometer calibration
HVAC
Bio physics
Process control
Flow meters
Cell phones
Gas ghromatography
Instrumentation
Anemometers
manometers
Battery management
Internal combustion
engines
Cold junction
reference temp
Cold junction
reference temp
Cold junction
reference temp
Advantages
Simple, low cost, selfpowered, rugged, wide
temp range
Most accurate, most
stable, good linearity
High sensitivity, fast
response, 2-wire ohm
measurement
Most linear, highest
output, inexpensive
Disadvantages
Non-linear, low
voltage, cold junction
required, least
sensitive & stable
Expensive, slow
response, excitation
required, low
sensitivity, 4-wire ohm
measurement
Poor linearity, more
limited temp range,
fragile, excitation
required, self-heating
issues
Limited temp range,
power supply needed,
slow, self-heating
issues, limited
package
Thermocouple or Thermopile Sensors
Thermocouples are the most popular
temperature sensor
• Low cost and package flexibility
Signal levels are near DC and non-linear
• Very small (10s of µV)
Cold junction compensation is required
• Accurate absolute measurements
Precision amplifiers work best
• Low offset, low drift, with high gain minimize errors
• High voltage and low voltage requirements
Diode Used for Cold
Junction Compensation
16
Low Voltage
Low Drift Op Amps
ISL28233
ISL28134
ISL28176
ANSI
High Voltage
ISL28130
Low Drift Op Amps
ISL28217
ISL28207
ISL28218
Material
Temp Range
( °C)
Sensitivity
(µV/C)
B
Platinum (6%)/Rhodium –
Platinum (30%)/Rhodium
38 to 1800
7.7
C
Tungsten (5%)/Rhenium –
Tungsten (26%)/Rhenium
0 to 2300
16
E
Chomel – Constantan
0 to 982
76
J
Iron – Constantan
0 to 760
55
K
Chromel – Alumel
-184 to
1260
39
R
Platinum (13%)/Rhodium –
Platinum
0 to 1593
11.7
S
Platinum (10%)/Rhodium –
Platinum
0 to 1538
10.4
T
Copper – Constantan
-184 to 400
45
ISL28218
Precision 40V Single Supply, Low Noise Operational Amplifier
ISL28118, ISL28218 has Outstanding Noise Performance at Half the Power .
Features
Single or Dual Supply, Rail-Rail Outputs
Below Ground (V-) Input Capability
42V Abs Max Differential Input Range
Wide Supply Range
3V to 40V
Low Current Consumption
1100 μA
Low Voltage Noise
5.6nV/rtHz
Temperature Range
-40°C to +125°C
Wide 3V to 40V
Operating Supply Range
Below Ground (V-) Input Capability
V+
Vpos + 500mv
To
Vneg - 500mV
-
+
V-
Vcm Range
extends to -0.5V
below Ground
Robust 42V
Differential Input Range
Typical Application :
Low Side Current Sense
ISL28218 Rail to Rail Output and
Ground Sensing Input are excellent for
Low Side Current Sense Applications
ISL28218
17
Competitive Summary
Max Is
Mfg
(uA)
ISL28218 1100
Comp A 2250
Comp B 2200
Noise
Noise
Max
.1 to 10Hz @ 1kHz GBP Max Vos
Ibias
nVp-p nV/rt Hz (MHz) (uV) TcVos (nA)
300
5.6
4
230
1.4
575
300
3.9
3.25
175
2
450
400
12
10.5
475
2.5
650
Low Side Current Sense Amp
Advantages
• Simplicity and low cost
• Low Common Mode Voltage
• Ground Sensing Input and Output
Disadvantages
ISL28218 is an excellent
choice for Low Side Current
Sense applications
• Ground Path disturbances / Transients
• Limited dynamic range
• Load is lifted from ground due to Shunt
Resistor
• No short circuit detection
Key amplifier requirements
Input Characteristics
Low Sensor Impedance
Low Signal voltage
(100’s uV to 10’s mV)
Depending on load current
Low Inductance
Low TC Rshunt
18
Vo = IL x Rshunt
x ( Rf /Ri + 1)
•
•
•
•
•
•
•
Ground Sensing Input
Rail to Rail Output
Low Offset (Dynamic Range)
Low Voltage Noise
Good response time (PWM)
Single op amp configuration for low cost
Differential 2 amp configuration for remote
sensors
Intersil Power Management in Industrial Control
Industrial Power
• Power is needed on all boards
Control
ISL80101
1.8V
Memory
In general, the power chain looks
like the one shown
• Vin -> Typ 24V, can go to 36V.
•
Isolation will be required for some
rails
•
5V
ISL85033
Embedded
Power
Controller
2.5V
FPGA/
uProcessor
3.3V
+15V
24V
ISL6844
Gnd
Gnd
Analog I/O
module
To Sensors
-15V
Buck to low voltage non-isolated
rails
•
LDO – Cleans up the noise from the
switchers
•
•
Power monitor, Sequencers
Reliability, Easy to use, Efficient &
re-usable
•
19
Keys to success
 Understand your full power chain, Vin –> Vout
 Understand what is your biggest concern, Efficiency, Size, etc.
Under stand your power needs
 Size, Efficiency, or a particular spec
 What Power Source
 Is Isolation needed
 What are you powering
ISL684X - Isolated Power Controller Family
Features
Fast 40 ns (Max) Peak-Current-Sensing Time Eliminates
Short-Circuit Current “Tail Out”
• 1A MOSFET Gate Driver
ISL6844
• 60μA Start-up Current, 100μA Maximum
• 25ns Propagation Delay Current Sense to
Output
• Fast Transient Response with Peak Current
Mode Control
Best Competitive
BiCMOS 3842
Bipolar
UC3842A
40
70
300
Max Current Sense Propagation Delay (ns)
(Shorter is better)
• Adjustable Switching Frequency to 2MHz
• 20ns Rise and Fall Times with 1nF Output Load
• Trimmed Timing Capacitor Discharge Current for
Accurate dead-time/Maximum Duty Cycle
Control
• High Bandwidth Error Amplifier
• Tight Tolerance Voltage Reference Over Line,
Load, and Temperature
• Tight Tolerance Current Limit Threshold
Superior performance
vs. Competition in every
specification
20
Feature
Smallest package option
Industrial operating temp range
Oscilator max frequency
Max current sense propagation delay
5 V reference accuracy over line, load, temp
2.5 V error amp reference total accuracy
Error amp unity gain bandwidth
Max operating supply current (no switching)
Max startup current
GATE output rise/fall times (1 nF load)
ISL6842
DFN-8
-40 ~ +105 C
2 MHz
40 ns
1.0%
1.0%
5 MHz
3 mA
100 uA
40 ns/40 ns
UC2842A
SOIC-8
-40 ~ +85 C
500 kHz
300 ns
2.0%
2.0%
1 MHz
17 mA
500 uA
150 ns/150 ns
UCC28C42
MSOP-8
-40 ~ +85 C
1 MHz
70 ns
3.6%
2.0%
1.5 MHz
3 mA
100 uA
50 ns/40 ns
MIC38C42A
MSOP-8
-40 ~ +85 C
1 MHz
250 ns
3.6%
3.2%
1 MHz
6 mA
230 uA
80 ns/60 ns
ISL85033 – 28V, 3A:3A Dual Std Buck Regulator
Dual Output, Standard Buck Regulator with
Integrated High Side MOSFET
Vin1
Vin2
CH1
CH2
Vout1: 3A
Vout2: 3A
• Vin range 4.5V to 28V
• Vout range 0.8V to 24V
Dual Buck Regulator - 3A/3A Outputs
• 3A/Channel guaranteed output current
• Selectable 180o Out of Phase operation or In
Phase operation modes
• Current Mode Control
• Output Current Sharing capability
• Fsw 500KHz (default) or 300KHz to 2MHz Adj.
• Synchronization to external clock – 360KHz to
2MHz
• Independent EN and PGOOD for both channels
• Independent Sequential ratio-metric or absolute
tracking between outputs
• Internal 5mS Soft-Start or Externally Adjustable
Soft-Start
21
Single Parallel Buck – 6A Output
Vin1
Vin2
CH1
CH2
Vout1: 6A
ISL80101/2/3 High Current PMOS LDOs
LDOs capable of 1A, 2A, and 3A current drive
• Designed for fast load transient response
• Tight ±2% VOUT accuracy over -40ºC < TJ < 125ºC
• 70dB PSRR over full-rated load current
• 90μVrms low output noise from 300Hz to 300kHz
• Less than 1µA shutdown current
• 7 industry-standard fixed & adjustable Vout
options:
• PGOOD, Enable, Short-Circuit & Reverse Current
Protection, & Over-Temperature Shutdown
Capability
Features
Fast Transient
Response
Helps to ensure that output voltage is properly
regulated even under varying load current step
changes
±2% Total DC
Accuracy
Tight accuracy will help guarantee a reliable POL
voltage supply in critical application fields such as
Medical, Industrial, Telecommunications, etc.
Low Dropout
Voltage
VDO must be low to minimize power dissipation and
maintain sufficient VOUT levels in spite of lower VIN
due to aging batteries
Enable, PG, IRSET,
OCP Protection,
Thermal Shutdown
Added key features help LDOs be more dependable
and customizable in different applications
2µs Settling
0 to 3A Load Step
Fast Transient Response
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Benefits
ISL80101/2/3 Competitive Advantages
Advantages on Key Specs
• Leading class fast load transient response and total AC regulation band for
LDOs in this category
• Best in class ±0.3% Initial Accuracy & ±1.8% Total DC Accuracy
– Guaranteed for full junction temp (TJ) -40°C to +125°C
– Over full rated load current capability
– Includes line & load regulation
• Best in class package power density (i.e. Up to 3A per 9mm2)
Key Differentiators Over Competition
• Enable & PGOOD are standard features
• Ability to set Inrush Current Limit via IRSET pin
• <1V EN Threshold for decreasing voltage applications
• Option for user-programmable Current Limit (*Contact Factory)
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Other Power Parts
Full Power chain available
• Sequencers to power the rails up
in a particular order –
Highlighted in brochure
• Power Monitors – to give early
detection if a rail goes down
• Power Modules – Complete
system in chip
ISL8201M Block Diagram
MOSFETs
Boot Capacitor
Inductor
Type III
Compensation
RSEN
24
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