AMS431 PRECISION ADJUSTABLE SHUNT REGULATOR APPLICATIONS
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Trimmed 0.25% Reference Wide Operating Current Range 250µA 150mA Dynamic Output Impedance Output Noise Nominal Temperature Range 85°C Temperature-Compensated: 60ppm/°C Internal Amplifier with 150mA Capability
AMS431
PRECISION ADJUSTABLE SHUNT REGULATOR
APPLICATIONS
Battery Powered Systems Switching Power Supplies Adjustable Power Supplies Linear Regulators Error Amplifiers Notebook/Personal Computer Monitors/ VCR/ Pagers
GENERAL DESCRIPTION
AMS431 three-terminal adjustable shunt regulator with guaranteed temperature stability over entire range operation. output voltage value between 2.5V (VREF) adding external resistors. sharp turn-on characteristics this device excellent replacement zener diodes many applications. AMS431 available TO-92, SO-8, SOT-89 SOT-23 packages.
ORDERING INFORMATION:
TOL. ±0.25% ±0.5% ±1.0% TO-92 AMS431AN AMS431BN AMS431CN PACKAGE TYPE LEAD SOIC AMS431AS AMS431BS AMS431CS SOT-89 AMS431AL AMS431BL AMS431CL LEAD SOT-23 AMS431AM AMS431BM AMS431CM OPERATING TEMP. RANGE +85° +85° +85°
CONNECTIONS
TO-92 Plastic Package SOIC Package SOT-89 SOT-23
ANODE
CATHODE ANODE ANODE ANODE ANODE
ANODE
CATHODE
CATHODE
ANODE CATHODE
Bottom View
View
View
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Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
(925) 443-0723
AMS431
ABSOLUTE MAXIMUM RATINGS (Note
Cathode Voltage (VZ) Continuous Cathode Current (IZ) Reference Input Current (IREF) Junction Temperature (TJ) Storage temperature Lead Temperature (Soldering, 10sec.) -10mA +150mA 10mA -40°C +125°C -65°C +150°C 265°C Internal Power Dissipation (PD) TO-92 Package SO-8 Package SOT-89 Package SOT-23 Package Thermal Resistance (JA) TO-92 Package SO-8 Package SOT-89 Package SOT-23 Package 0.78W 0.71W 0.91W 0.28W 160°C/W 175°C/W 110°C/W 410°C/W
Note Absolute Maximum Ratings indicate limits beyond which damage device occur. Operating Ratings indicate conditions which device
intended functional, guarantee specific performance limits. guaranteed specifications test conditions, Electrical Characteristics. guaranteed specifications apply only test conditions listed.
ELECTRICAL CHARACTERISTICS
Electrical Characteristics +25°C unless otherwise specified. Parameter
Reference Voltage Deviation Reference Input Voltage over Temperature Ratio Change Reference Voltage Cathode Voltage Reference Input Current Reference Input Current Deviation over Temperature State Cathode Current Dynamic Output Impedance Minimum Operating Current VREF (circuit +25°C +85°C -40°C +25°C from VREF from VREF =10k, (test circuit =10k, Full Range (test circuit 36V, VREF test circuit 1KHz, VREF =100µA 100mA (test circuit VREF (test circuit
Conditions
2.489
AMS431A
2.495 -0.5 -1.0 2.501 -2.7 -2.0
2.483
AMS431B
2.495 -0.5 -1.0
2.507 -2.7 -2.0
2.470
AMS431C
2.495 -0.5 -1.0 2.520 -2.7 -2.0
Units
mV/V mV/V
0.04 0.25
0.04 0.25
0.04 0.25
RECOMMENDED OPERATING CONDITIONS:
VREF 0.25mA 120mA
Cathode Voltage, (VZ) Cathode Current, (IZ)
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
(925) 443-0723
AMS431
TEST CIRCUITS
VREF
IREF VREF
IREF
VREF
Figure Test Circuit VZ=VREF
Figure Test Circuit VREF Test circuit IREF.
Figure Test Circuit Off-State Current
TYPICAL APPLICATIONS
Single Supply Comparator with Temperature Compensated Threshold
VREF 2.5V
Shunt Regulator
VOFF
(1+R1/R2)VREF
Series Regulator
Higher Current Shunt Regulator
0.01µF
(1+R1/R2)VREF
(1+R1/R2)VREF
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
(925) 443-0723
AMS431
TYPICAL APPLICATIONS (Continued)
Over Voltage/Under Voltage Protection Circuit
WHEN HIGH LIMIT LIMIT
Voltage Monitor
LIMIT VREF( 1+R1B/R2B)+VBE LIMIT VREF( 1+R1A/R2A)
LIMIT VREF( 1+R1B/R2B)+VBE LIMIT VREF( 1+R1A/R2A)
WHEN LIMIT HIGH LIMIT
Delay Timer
Current Limiter Current Source
DELAY R*C*ln*V+/(V+)-VREF
=VREF/RCL
Constant Current Sink
VREF/RS
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
(925) 443-0723
AMS431
TYPICAL PERFORMANCE CHARACTERISTICS
Input Current
25°C
Thermal Information 1000 REFERENCE VOLTAGE
SOT-89
Input Current INPUTT CURRENT (mA)
25°C
INPUTT CURRENT (µA)
CATHODE VOLTAGE
TO-92
SO-8
SOT-23
TEMPERATURE CATHODE VOLTAGE
PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted.
TO-92 PLASTIC PACKAGE
0.060±0.005 (1.524±0.127)
0.180±0.005 (4.572±0.127) 0.060±0.010 (1.524±0.254)
0.180±0.005 (4.572±0.127)
0.90 (2.286)
0.140±0.010 (3.556±0.127)
0.500 (12.70)
0.050 (1.270)
UNCONTROLLED LEAD DIMENSIONS
0.050±0.005 (1.270±0.127)
0.016±0.003 (0.406±0.076)
0.015±0.002 (0.381±0.051)
(TO-92 DRW# 042391
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
(925) 443-0723
AMS431
PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted (Continued).
LEAD SOIC PLASTIC PACKAGE
0.189-0.197* (4.801-5.004)
0.228-0.244 (5.791-6.197)
0.150-0.157** (3.810-3.988)
0.053-0.069 (1.346-1.752) 0.004-0.010 (0.101-0.254) 0.008-0.010 (0.203-0.254)
0.010-0.020 (0.254-0.508) 0°-8°
0.014-0.019 (0.355-0.483)
0.050 (1.270)
0.016-0.050 (0.406-1.270)
(SO-8 DRW# 042293
*DIMENSION DOES INCLUDE MOLD FLASH. MOLD FLASH SHALL EXCEED 0.006" (0.152mm) SIDE **DIMENSION DOES INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL EXCEED 0.010" (0.254mm) SIDE
SOT-89 PLASTIC PACKAGE
0.173-0.181 (4.40-4.60) 0.064-0.072 (1.62-1.83)
0.055-0.063 (1.40-1.60) 0.014-0.017 (0.35-0.44)
0.155-0.167 (3.94-4.25) 0.090-0.102 (2.29-2.60) 0.084-0.090 (2.13-2.29)
0.035-0.047 (0.89-1.20) 0.059 (1.50) 0.118 (3.00) 0.014-0.019 (0.36-0.48) 0.017-0.022 (0.44-0.56)
(SOT-89 DRW# 042392
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
(925) 443-0723
AMS431
PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted (Continued).
LEAD SOT-23 PLASTIC PACKAGE
0.110-0.120 (2.794-3.048) 0.015-0.017 (0.381-0.432)
0.083-0.098 (2.108-2.489) 0.047-0.055 (1.194-1.397)
0.035-0.040 (0.889-1.016)
0.018-0.024 (0.457-0.610)
0.035-0.041 (0.089-1.041) 0.0034-0.0050 (0.086-0.127) 0.0005-0.0040 (0.013-0.102) 0.070-0.080 (1.778-2.032) 0.018-0.024 (0.457-0.610)
(SOT-23 DRW# 051991
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
(925) 443-0723
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