AP431/AP431A Adjustable Precision Shunt Regulator Features • • • • • • • • • Description The AP431/AP431A are 3-terminal adjustable precision shunt regulators with guaranteed temperature stability over the applicable extended commercial temperature range. The output voltage may be set at any level greater than 2.495V(VREF) up to 36V merely by selecting two external resistors that act as a voltage divider network. These devices have a typical output impedance of 0.2Ω. Active output circuitry provides very sharp turn-on characteristics, making these devices excellent improved replacements for Zener diodes in many applications. The precise (+/-) 1% Reference voltage tolerance of the AP431/431A make it possible in many applications to avoid the use of a variable resistor, consequently saving cost and eliminating drift and reliability problems associated with it. Precision reference voltage AP431 : 2.495V ± 1% AP431A : 2.495V ± 0.5% Sink current capability: 200mA Minimum cathode current for regulation: 300μA Equivalent full-range temp coefficient: 30 ppm/oC Fast turn-on response Low dynamic output impedance: 0.2Ω Programmable output voltage to 36v Low output noise. Packages: TO92, SOT89, SOT23, SOT25 and SOP Ordering Information A P 4 3 1 X X X X X Operating Temp. Range Blank : I : Reference Voltage -20 oC~85oC -40 oC~85oC Lead Free Package Packing Blank : Normal Blank : SOP-8L Blank : Tube or bulk Y : SOT89-3L L : Lead Free Package A : Taping V : TO92-3L W : SOT23-3L R : SOT23-3L Q : SOT25 Tolerance: Blank : +/- 1% A : +/- 0.5% Typical Application Circuit VIN VOUT + R1 Cin + Cout AP431 R2 VOUT = (1+R1/R2)VREF Precision Regulator This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product. Rev.1.0 May.7, 2004 1/17 AP431/AP431A Adjustable Precision Shunt Regulator Symbol Block Diagram Cathode (C) REF (R) + Cathode (C) VREF REF (R) Anode (A) Anode (A) Pin Configuration Order Number Pin Configuration (Top View) AP431Y AP431 AY AP431IY AP431IAY (SOT89) 3 Cathode AP431R AP431AR AP431IR AP431IAR (SOT23) 2 Anode 1 REF + 3 Cathode + 2 Anode + AP431V AP431 AV AP431IV AP431IAV (TO92) AP431 AP431A AP431I AP431IA (SOP) Order Number 1 REF AP431W AP431AW AP431IW AP431IAW (SOT23) Cathode 1 8 REF Anode 2 7 Anode Anode 3 6 Anode NC 4 5 NC AP431 Q AP431 AQ AP431IQ AP431IAQ (SOT25) Anachip Corp. www.anachip.com.tw Pin Configuration (Top View) 3 Cathode Anode 1 2 REF 3 REF Anode 1 2 Cathode NC 1 NC 2 Cathode 3 5 Anode 4 REF Rev.1.0 May.7, 2004 2/17 AP431/AP431A Adjustable Precision Shunt Regulator Marking Information (1) SOT23 / SOT25 / SOT89 P/N Type AP431Y AP431AY AP431IY AP431IAY AP431W AP431AW AP431IW AP431IAW AP431R AP431AR AP431IR AP431IAR AP431Q AP431AQ AP431IQ AP431IAQ XX A4 A5 AA AB A6 A7 AC AD A8 A9 AE AF A2 A3 AG AH (Top View) SOT23/SOT25 SOT89 XX YM X XX YMX XX: P/N Type Date code Y : Year M : Month(A~L) X: Blank : normal L : Lead Free Package (2) SOP ( Top view ) AC AP431X X YYWW X Logo Date code YY : Year WW: Nth week Lead Free Blank: normal L: Lead Free Package Temp. grade Blank: -20oC ~ +85oC I : -40oC ~ +85oC Accuracy Blank: 2 . 495 ± 1 % A : 2 . 495 ± 0 . 5 % (3)TO92 ( Top view ) Temp. grade Accuracy Blank: 2.495 ± 1% A : 2.495 ± 0.5% Date code AP431X X YWW X X Internal code Y : Year WW: Nth week Blank: -20oC ~ +85oC I : -40oC ~ +85oC Lead Free Blank: normal L: Lead Free Package Anachip Corp. www.anachip.com.tw Rev.1.0 May.7, 2004 3/17 AP431/AP431A Adjustable Precision Shunt Regulator Absolute Maximum Ratings Cathode Voltage ………………………………......…..............................……………………………...……….36V Continuous Cathode Current ………………………….……...............................…………….... -10mA ~ 250mA Reference Input Current Range ……………..………..............……..............................………….…....... 10mA Operating Temperature Range (AP431)…………..…….…….....………………...........………......-20oC ~ 85oC (AP431I).……………….….............………………………...…….. -40oC ~ 85oC Lead Temperature………………………….………….…….…………....…………………….........…............ 260oC Storage Temperature ……………………………......…....….............………………..……............ -65oC ~ 150oC Power Dissipation (Notes 1. 2) SOT89 Package .…………......……………………….............….... 0. 80W TO92 Package ….…………..………………………....……….....… 0.78W SOT23 package .……………..…………….......………………….…. 0.25W SOT25 Package……………….……...…………….…………………..0.25W SOP Package………………..………………………………..……… 0.6W Note 1: TJ, max =150oC Note 2: Ratings apply to ambient temperature at 25oC Electrical Characteristics (Ta=25oC , unless otherwise specified.) PARAMETER TEST CONDITIONS VKA = VREF, AP431 Reference voltage I KA = 10mA (Fig.1) AP431A Deviation of Reference input voltage VKA = VREF, IKA = 10mA, over temperature (Note 3) Ta = Full range (Fig.1) Ratio of the change in Reference VKA = 10V voltage to the change in Cathode IKA = 10mA (Fig.2) ~VREF voltage VKA= 36V ~10V R1 = 10KΩ,R2 = ∞ IKA= 10mA Reference input current (Fig.2) Deviation of Reference input current R1 = 10KΩ,R2 = ∞ IKA = 10mA over temperature Ta = Full range (Fig.2) Minimum Cathode current for VKA = VREF (Fig.1) regulation Off-state current VKA = 36V, VREF = 0V (Fig.3) V KA = VREF V KA = VREF Dynamic output impedance (Note 4) ∆IKA = 0.1mA ~ 15mA Frequency ≤ 1KHz (Fig.1) SYMBOL MIN. TYP. MAX. UNIT VREF 2.470 2.495 2.520 2.482 2.507 V VREF 8.0 mV ∆VREF -1.4 ∆VKA -1 -2 mV/V IREF 1.4 3.5 µA αIREF 0.4 1.2 µA IKA(MIN) 0.19 0.5 mA IKA(OFF) 0.1 1.0 µA Z KA 0.2 0.5 Ω 20 -2.0 mV/V VMAX VDEV = VMAX - VMIN VMIN TI TEMPERATURE Anachip Corp. www.anachip.com.tw T2 Rev.1.0 May.7, 2004 4/17 AP431/AP431A Adjustable Precision Shunt Regulator Note 3. Deviation of reference input voltage, VDEV, is defined as the maximum variation of the reference over the full temperature range. The average temperature coefficient of the reference input voltage αVREF is defined as: VDEV ) ⋅10 6 VREF (25°C) ……………………..……………….. ( ppm ) = °C T2 − T1 ( α VREF Where: T2 – T1 = full temperature change. αVREF can be positive or negative depending on whether the slope is positive or negative. Note 4. The dynamic output impedance, RZ, is defined as: Z KA = ∆ V KA ∆ IKA When the device is programmed with two external resistors R1 and R2 (see Figure 2.), the dynamic output impedance of the overall circuit, is defined as: ' Z KA = ∆v ≈ Z KA ∆i (1 + R1 ) R2 Test Circuits Input IN VKA IKA IKA VKA R1 VREF IN R2 VKA IREF IZ(OFF) VREF Note:VKA=VREF(1+R1/R2)+IREF× R1 Fig1. Test Circuit for V KA= VREF Fig2. Test circuit for V KA＞VREF Anachip Corp. www.anachip.com.tw Fig3. Test Circuit for off-state Current Rev.1.0 May.7, 2004 5/17 AP431/AP431A Adjustable Precision Shunt Regulator Typical Performance Characteristics Cathode current Vs Cathode Voltage Cathode current (uA) Vs Cathode Voltage 600 VKA=Vref Ta=25oC Cathode current(uA) Cathode current(mA) 100 0 -100 0.5 -0.5 Cathode Voltage(v) -1.5 1.5 200 0 -0.5 0 0.5 1.5 1 Cathode Voltage(v) 2 2.5 Reference input current Vs free Temperature Reference input current (uA) Reference Voltage Vs Free-Air Temperature 2500 Reference Voltage(mV) 400 -200 -1 2.5 VKA=Vref Ta=25oC 2495 2490 2485 2480 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 Free-Air Tempeture (oC) 2 1.8 R1=10K IKA=10mA 1.6 1.4 1.2 1 -50 -25 0 25 50 75 Free-Air Temperature(oC) 100 125 Change in Reference Voltage (mv) Change in Reference Voltage vs Cathode Voltage 0 -2 IKA=10mA Ta=25oC -4 -6 -8 -10 -12 0 5 10 15 20 Cathode Voltage (V) 25 30 Anachip Corp. www.anachip.com.tw Rev.1.0 May.7, 2004 6/17 AP431/AP431A Adjustable Precision Shunt Regulator Typical Performance Characteristics(Continued) SMALL-SIGNAL VOLTAGE AMPLIFICATION vs. FREQUENCY IKA=10mA TA=25oC 50 Output IKA 15KΩ 40 + 9µF 30 232Ω + - AV-Small Signal Voltage Amplification (dB) 60 - 8.25KΩ GND 20 TEST CIRCUIT FOR VOLTAGE AMPLIFICATION 10 0 1K 10K 100K f-Frequency-Hz 1M 10M REFERENCE IMPEDANCE vs. FREQUENCY ∣ZKA∣—Reference Impedance —Ω 100 IKA=10mA TA=25oC 1KΩ Output I KA 10 50Ω + GND 1 TEST CIRCUIT FOR REFERENCE IMPEDANCE 0.1 1K 10K 100K 1M 10M f-Frequency-Hz Anachip Corp. www.anachip.com.tw Rev.1.0 May.7, 2004 7/17 AP431/AP431A Adjustable Precision Shunt Regulator PULSE RESPONSE 6 TA=25oC Input Input and Output Voltage-V 5 220Ω 4 Pulse Generator f=100kHz 3 Output 50Ω Output GND 2 TEST CIRCUIT FOR PULSE RESPONSE 1 0 -1 0 1 2 3 4 5 6 7 t-Time-µ S STABILITY BOUNDARY CONDITIONS † 150Ω 100 o IKA-Cathode Current-mA A VKA=Vref TA=25 C 90 B VKA=5V 80 C VKA=10V D VKA=15V B 50 CL Stable 70 60 I KA + - VBATT C Stable TEST CIRCUIT FOR CURVE A A 40 30 D I KA 20 10 CL 0 0.001 150Ω R1=10KΩ R2 0.01 0.1 1 C L-Load Capacitance-µF 10 The areas under the curves represent conditions that may cause the device to oscillate. For curves B, C, and D, R2 and V+ were adjusted to establish the initial V KA and I KA conditions with C L =0.V BATT and CL were then adjusted to determine the ranges of stability. Anachip Corp. www.anachip.com.tw + - VBATT TEST CIRCUIT FOR CURVE B, C, AND D Rev.1.0 May.7, 2004 8/17 AP431/AP431A Adjustable Precision Shunt Regulator Application Examples VIN V IN RCL R VIN R1B R1A ON R2A R2B + OFF LED on when Low Limit＜VIN＜High Limit Low Limit ≈ VREF (1+R1B/R2B) High Limit ≈ VREF (1+R1A/R2A) V IN Delay = RC x ln( ) VIN -VREF Fig.5 Delay Timer Fig.4 Voltage Monitor VIN IOUT IOUT VIN IOUT = VREF / RCL Fig.6 Current Limiter or Current Source VOUT VIN R1 R1 R2 R2 RS LIMIT VOUT = (1 + R1/R2) x VREF IOUT = VREF / RS Fig.7 Constant-Current Sink VOUT PUSE Fig.8 Higher-Current Shunt Regulator (1 + R1/R2) x VREF Fig.9 Crow Bar VIN R1A R1B + R2A Low Limit High Limit Output ON when Low Limint < VIN< High Limit VBE R2B VREF (1 + R1B/R2B) +VBE VREF(1 + R1A/R2A) Fig.10 Over-Voltage / Under-Voltage Protection Circuit Anachip Corp. www.anachip.com.tw Rev.1.0 May.7, 2004 9/17 AP431/AP431A Adjustable Precision Shunt Regulator Package Diagrams (1) SOT89-3L Package Outline Dimension L HE E D1 e1 e 50(2x) 80(2x) D A c b Symbol A b b1 C D D1 e e1 E HE L b1 b Dimensions In Millimeters Min. 1.40 0.36 0.41 0.35 4.40 1.40 2.90 1.45 2.40 3.94 0.80 Nom. 1.50 0.42 0.47 0.39 4.50 1.60 3.00 1.50 2.50 - Max. 1.60 0.48 0.53 0.43 4.60 1.75 3.10 1.55 2.60 4.25 1.20 Anachip Corp. www.anachip.com.tw Dimensions In Inches Min. 0.055 0.014 0.016 0.014 0.173 0.055 0.114 0.057 0.094 0.155 0.031 Nom. 0.059 0.016 0.043 0.015 0.177 0.062 0.118 0.059 0.098 - Max. 0.063 0.018 0.051 0.017 0.181 0.069 0.122 0.061 0.102 0.167 0.047 Rev.1.0 May.7, 2004 10/17 AP431/AP431A Adjustable Precision Shunt Regulator (2) TO92-3L Package Outline Dimension A1 A b b1 b D e E Symbol A A1 b b1 D E L e L Dimensions In Millimeters Min. Nom. Max. 3.302 3.556 3.810 1.016 0.330 0.381 0.432 0.406 0.457 0.506 4.445 4.572 4.699 4.445 4.572 4.699 13.00 15.500 1.150 1.270 1.390 Anachip Corp. www.anachip.com.tw Dimensions In Inches Min. Nom. Max. 0.130 0.140 0.150 0.040 0.013 0.015 0.017 0.016 0.018 0.020 0.175 0.180 0.185 0.175 0.180 0.185 0.512 0.610 0.045 0.050 0.055 Rev.1.0 May.7, 2004 11/17 AP431/AP431A Adjustable Precision Shunt Regulator (3) SOT23-5L Package Outline Dimension D e1 θ1(4x) 4 5 E1 A E 0.10 C 5x A2 Seating Plane A1 1 2 θ 2(4x) 3 b e With Plating b1 C C1 Gauge Plane 0.25 mm θ Base Metal L b Symbol L1 Dimensions In Millimeters Min. Nom. Max. Dimensions In Inches Min. Nom. Max. A 1.05 1.20 1.35 0.041 0.047 0.053 A1 0.05 0.10 0.15 0.002 0.004 0.006 A2 1.00 1.10 1.20 0.039 0.043 0.047 b 0.25 - 0.55 0.010 - 0.022 b1 0.25 0.40 0.45 0.010 0.016 0.018 c 0.08 - 0.20 0.003 - 0.008 c1 0.08 0.11 0.15 0.003 0.004 0.006 D 2.70 2.85 3.00 0.106 0.112 0.118 E 2.60 2.80 3.00 0.102 0.110 0.118 E1 1.50 1.60 1.70 0.059 0.063 0.067 L 0.35 0.45 0.55 0.014 0.018 0.022 L1 0.60 Ref. 0.024 Ref. e 0.95 Bsc. 0.037 Bsc. e1 θ 0o 1.90 Bsc. 5o 10o 0o 0.075 Bsc. 5o 10o θ1 3o 5o 7o 3o 5o 7o θ2 6o 8o 10o 6o 8o 10o Anachip Corp. www.anachip.com.tw Rev.1.0 May.7, 2004 12/17 AP431/AP431A Adjustable Precision Shunt Regulator (4) SOT23-3L Package Outline Dimension E HE 2 1 3 e A A1 A2 b C D E e HE L Dimensions In Millimeters Min. 1.00 0.00 1.00 0.35 0.10 2.70 1.40 1.70 2.40 0.30 Nom. 1.20 1.15 0.175 2.90 1.60 2.00 2.70 - L C A1 b Symbol A A2 D Max. 1.40 0.10 1.30 0.50 0.25 3.10 1.80 2.30 3.00 0.55 Anachip Corp. www.anachip.com.tw Dimensions In Inches Min. 0.039 0.000 0.039 0.014 0.004 0.106 0.055 0.067 0.094 0.012 Nom. 0.047 0.045 0.007 0.114 0.063 0.079 0.106 - Max. 0.055 0.004 0.051 0.020 0.010 0.122 0.071 0.091 0.118 0.022 Rev.1.0 May.7, 2004 13/17 AP431/AP431A Adjustable Precision Shunt Regulator H E (5) SOP-8L Package Outline Dimension L VIEW "A" D 0.015x45 7 (4X) e B A1 C A A2 7 (4X) VIEW "A" y Symbol A A1 A2 B C D E e H L y θ Dimensions In Millimeters Min. Nom. Max. 1.40 1.60 1.75 0.10 0.25 1.30 1.45 1.50 0.33 0.41 0.51 0.19 0.20 0.25 4.80 5.05 5.30 3.70 3.90 4.10 1.27 5.79 5.99 6.20 0.38 0.71 1.27 0.10 0O 8O Anachip Corp. www.anachip.com.tw Dimensions In Inches Min. Nom. Max. 0.055 0.063 0.069 0.040 0.100 0.051 0.057 0.059 0.013 0.016 0.020 0.0075 0.008 0.010 0.189 0.199 0.209 0.146 0.154 0.161 0.050 0.228 0.236 0.244 0.015 0.028 0.050 0.004 0O 8O Rev.1.0 May.7, 2004 14/17 AP431/AP431A Adjustable Precision Shunt Regulator Taping Information (1)TO92 TAPING M Ho ∆h A T Po Do Symbol Po M Ho Do A Δh T F1 F2 Min. 12.4 2.0 15.5 0.0 2.4 2.4 Millimeters Typ. 12.7 2.5 16.0 4.0 6.0 18.0 2.5 2.5 Max. 13.0 3.0 16.5 1.0 2.9 2.9 F2 F1 Min. 0.488 0.079 0.610 0.000 0.094 0.094 Inches Typ. 0.500 0.098 0.630 0.157 0.236 0.709 0.098 0.098 Max. 0.512 0.118 0.650 0.039 0.114 0.114 40mm 205mm E 330mm 90 ±1mm 30 ±1mm 53 ±2mm 45mm 76 ±1mm 360 ±2mm Anachip Corp. www.anachip.com.tw Rev.1.0 May.7, 2004 15/17 AP431/AP431A Adjustable Precision Shunt Regulator (2)TO92 TAPING H2 H2 H2A H2A D2 A H3 L H4 H L1 W1 H1 W D T2 T T1 F1 F2 D1 P1 P P2 Millimeters Min. Typ. A 3.18 7.59 D 3.8 4 D1 0.36 0.445 D2 F1,F2 2.4 2.5 F1-F2 0.30 H 15.5 16 H1 8.5 9 H2 H2A H3 H4 L L1 2.5 P 12.5 12.7 P1 5.95 6.35 P2 50.3 50.8 T T1 T2 0.36 0.52 W 17.5 18.25 W1 5 6 ----* 253 254 ----* = every 20 pcs distance. Symbol Max. 12 4.2 0.53 9.0 2.7 16.5 9.5 0.5 0.5 27 20 11 12.9 6.75 51.3 0.55 1.42 0.68 19 7 255 Anachip Corp. www.anachip.com.tw Min. 0.125 0.150 0.014 0.094 0.610 0.335 0.098 0.492 0.234 1.980 0.014 0.689 0.197 9.961 Inches Typ. 0.299 0.157 0.018 0.098 ±0.012 0.630 0.354 0.500 0.250 2.000 0.020 0.719 0.236 10.000 Max. 0.472 0.165 0.021 0.354 0.106 0.650 0.374 0.020 0.020 1.063 0.787 0.433 0.508 0.266 2.020 0.022 0.056 0.027 0.748 0.276 10.039 Rev.1.0 May.7, 2004 16/17 AP431/AP431A Adjustable Precision Shunt Regulator BOX Dimension 41 197 330 556 37.5 38.5 40 53 195 40 330 40.5 811.5 40.5 39.5 6 18.68 195 24 4.68 40 70 43 18.18 16.67 unit:mm. Anachip Corp. www.anachip.com.tw Rev.1.0 May.7, 2004 17/17