|
If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
Datasheet File OCR Text: |
Advanced Monolithic Systems FEATURES * Trimmed 0.25% Reference * Wide Operating Current Range 250A to 150mA * Low Dynamic Output Impedance * Low Output Noise * Nominal Temperature Range to 85C * 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/ TV * Pagers GENERAL DESCRIPTION The AMS431 is a three-terminal adjustable shunt regulator with guaranteed temperature stability over the entire range of operation. The output voltage can be set to any value between 2.5V (VREF) and 36V by adding two external resistors. Due to the sharp turn-on characteristics this device is an excellent replacement for zener diodes in many applications. AMS431 is available in TO-92, SO-8, SOT-89 and SOT-23 packages. ORDERING INFORMATION: TOL. 0.25% 0.5% 1.0% TO-92 AMS431AN AMS431BN AMS431CN PACKAGE TYPE 8 LEAD SOIC AMS431AS AMS431BS AMS431CS SOT-89 AMS431AL AMS431BL AMS431CL 3 LEAD SOT-23 AMS431AM AMS431BM AMS431CM OPERATING TEMP. RANGE -40 to +85 C -40 to +85 C -40 to +85 C PIN CONNECTIONS TO-92 Plastic Package (N) 8L SOIC SO Package (S) SOT-89 (L) 3L SOT-23 (M) ANODE 1 2 3 CATHODE ANODE ANODE 1 2 3 4 8 7 6 5 REF ANODE ANODE N/C REF ANODE CATHODE N/C 1 REF 2 3 REF CATHODE ANODE CATHODE Bottom View Top View Top View Top View Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140 AMS431 ABSOLUTE MAXIMUM RATINGS (Note 1) Cathode Voltage (VZ) Continuous Cathode Current (IZ) Reference Input Current (IREF) Junction Temperature (TJ) Storage temperature Lead Temperature (Soldering, 10sec.) 37V -10mA to +150mA 10mA -40C to +125C -65C to +150C 265C 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 160C/W 175C/W 110C/W 410C/W Note 1 : Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed specifications apply only for the test conditions listed. ELECTRICAL CHARACTERISTICS Electrical Characteristics at IZ =10 mA and TA = +25C unless otherwise specified. Parameter Reference Voltage Deviation of Reference Input Voltage over Temperature Ratio of Change in Reference Voltage to Cathode Voltage Reference Input Current Reference Input Current Deviation over Temperature Off State Cathode Current Dynamic Output Impedance Minimum Operating Current VZ = VREF (circuit 1) TA = +25C to +85C TA = -40C to +25C VZ from VREF to 10V VZ from VREF to 36V R1 =10k, R2 = (test circuit 2) R1 =10k, R2 = TA = Full Range (test circuit 2) VZ = 36V, VREF = 0V ( test circuit 3) f < 1KHz, VZ = VREF IZ =100A to 100mA (test circuit 1) VZ = VREF (test circuit 1) 100 250 100 250 100 250 A Conditions Min 2.489 AMS431A Typ Max 2.495 8.0 8.0 -0.5 -1.0 0.5 2.501 15 15 -2.7 -2.0 4.0 Min 2.483 AMS431B Typ 2.495 8.0 8.0 -0.5 -1.0 0.5 Max 2.507 15 15 -2.7 -2.0 4.0 Min 2.470 AMS431C Typ Max 2.495 8.0 8.0 -0.5 -1.0 0.5 2.520 15 15 -2.7 -2.0 4.0 Units V mV mV mV/V mV/V A 0.4 1.2 0.4 1.2 0.4 1.2 A A 0.04 0.25 0.5 0.5 0.04 0.25 0.5 0.5 0.04 0.25 0.5 0.5 RECOMMENDED OPERATING CONDITIONS: Min VREF 0.25mA Max 36 V 120mA Cathode Voltage, (VZ) Cathode Current, (IZ) Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140 AMS431 TEST CIRCUITS VIN VZ = VREF VIN VZ VIN VZ IREF IZ VREF R1 IREF IZ IZ OFF R2 VREF Figure 1. Test Circuit for VZ=VREF Figure 2. Test Circuit for VREF vs IZ. Test circuit for IREF. Figure 3. Test Circuit for Off-State Current TYPICAL APPLICATIONS Single Supply Comparator with Temperature Compensated Threshold VO R1 VREF R2 IN VTH 2.5V V+ Shunt Regulator V+ OUT VON 2V VOFF = V+ VO (1+R1/R2)VREF GND Series Regulator V+ V+ Higher Current Shunt Regulator VO 30 R1 0.01F R1 VO R2 R1 VO (1+R1/R2)VREF VO (1+R1/R2)VREF Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140 AMS431 TYPICAL APPLICATIONS (Continued) Over Voltage/Under Voltage Protection Circuit V+ R1B OUT ON WHEN LOW < V+ < HIGH LIMIT LIMIT Voltage Monitor V+ R1B R1A R1A R2A R2B R2A R2B LOW LIMIT VREF( 1+R1B/R2B)+VBE LOW LIMIT VREF( 1+R1A/R2A) LOW LIMIT VREF( 1+R1B/R2B)+VBE LOW LIMIT VREF( 1+R1A/R2A) LED ON WHEN LOW LIMIT < V+ < HIGH LIMIT Delay Timer V+ Current Limiter or Current Source IO V+ RCL R OFF ON C DELAY = R*C*ln*V+/(V+)-VREF IO =VREF/RCL Constant Current Sink V+ IO RS IO = VREF/RS Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140 AMS431 TYPICAL PERFORMANCE CHARACTERISTICS Input Current vs V = 25C VZ = V REF Z Thermal Information 1000 REFERENCE VOLTAGE (V) SOT-89 Input Current vs V Z 150 INPUTT CURRENT (mA) = 25C VZ = V REF INPUTT CURRENT (A) 500 400 300 200 100 0 0 1.0 2.0 CATHODE VOLTAGE (V) 3.0 I Z MIN 100 500 TO-92 SO-8 50 SOT-23 100 0 25 70 85 125 TEMPERATURE ( C) 0 1.0 2.0 CATHODE VOLTAGE (V) 3.0 PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted. 3L TO-92 PLASTIC PACKAGE (N) 0.0600.005 (1.5240.127) DIA 0.1800.005 (4.5720.127) 0.0600.010 (1.5240.254) 0.1800.005 (4.5720.127) 0.90 (2.286) NOM 0.1400.010 (3.5560.127) 5 NOM 0.500 (12.70) MIN 10 NOM 0.050 (1.270) MAX UNCONTROLLED LEAD DIMENSIONS 0.0500.005 (1.2700.127) 0.0160.003 (0.4060.076) 0.0150.002 (0.3810.051) N (TO-92 ) AMS DRW# 042391 Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140 AMS431 PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted (Continued). 8 LEAD SOIC PLASTIC PACKAGE (S) 0.189-0.197* (4.801-5.004) 8 7 6 5 0.228-0.244 (5.791-6.197) 0.150-0.157** (3.810-3.988) 1 2 3 4 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 x 45 (0.254-0.508) 0-8 TYP 0.014-0.019 (0.355-0.483) 0.050 (1.270) TYP 0.016-0.050 (0.406-1.270) S (SO-8 ) AMS DRW# 042293 *DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE **DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE SOT-89 PLASTIC PACKAGE (L) 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) BSC 0.118 (3.00) BSC 0.014-0.019 (0.36-0.48) 0.017-0.022 (0.44-0.56) L (SOT-89 ) AMS DRW# 042392 Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140 AMS431 PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted (Continued). 3 LEAD SOT-23 PLASTIC PACKAGE (M) 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) 10 NOM 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) 10 NOM 0.018-0.024 (0.457-0.610) (SOT-23 ) AMS DRW# 051991 Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140 |
Price & Availability of AMS431 |
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
[Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |