AP432/AP432A ADJUSTABLE PRECISION SHUNT REGULATOR General Description Features • • • • • • • • • • • The AP432/432A are 3-terminal adjustable precision shunt regulators with guaranteed stable temperature over the applicable extended commercial temperature range. The output voltage may be set at any level greater than 1.24\/ (VREF) up to 20V 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. Precision reference voltage AP432 : 1.24V ± 1% AP432A : 1.24V ± 0.5% Sink current capability: 200mA Minimum cathode current for regulation: 150µA o Equivalent full-range temp coefficient: 30 ppm/ C Fast turn-on response Low dynamic output impedance: 0.2Ω Programmable output voltage to 20V Low output noise Packages: SOT23, SOT23R, SOT25, SC59 (W package code), SC59 (R package code), SOP-8L and TO92-3L SOT23, SOT23R, SOP-8L and SC59: Available in “Green” Molding Compound (No Br, Sb) (Note 1) Lead Free Finish/ RoHS Compliant for Lead Free and “Green” Products (Note 2) The precise +/- 1% reference voltage tolerance of the AP432/432A 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. Ordering Information A P 4 3 2 X X X X Package Reference Voltage Blank : V : SA : : W : R Q : SR : Tolerance: Blank : +/- 1% A : +/- 0.5% Note: SOP-8L TO92-3L SOT23 SC59 SC59 SOT25 SOT23R L : Lead Free G : Green (Note 1) Packing -B : Bulk -7/-13 : Taping -A : Ammo Box (Note 3) 1. SOT23, SOT23R are “Green” products only. 2. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7. Device (Note 4) Lead-free Lead-Free 7” Tape and Reel 13” Tape and Reel Ammo Box Package Packaging Part Number Part Number Part Number Code (Note 5) Quantity Quantity Quantity Suffix Suffix Suffix AP432(A)SA SA SOT23 AP432(A)SR SR SOT23R AP432(A)Q Q SOT25 AP432(A)W W SC59 AP432(A)R R SC59 AP432(A) AP432(A)V V 3000/Tape & Reel 3000/Tape & Reel 3000/Tape & Reel 3000/Tape & Reel 3000/Tape & Reel -7 NA NA NA NA -7 NA NA NA NA -7 NA NA NA NA -7 NA NA NA NA -7 NA NA NA NA -13 NA NA NA 2000/Box -A SOP-8L NA NA TO92-3L NA NA 2500/Tape & Reel NA Lead-free Notes: 3. Ammo Box is for TO92-3 Spread Lead. 4. Suffix “A” denotes AP432A device. 5. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf. AP432/AP432A Rev. 6 1 of 12 www.diodes.com MARCH 2007 © Diodes Incorporated AP432/AP432A ADJUSTABLE PRECISION SHUNT REGULATOR Pin Assignment Pin Configuration (Top View) Package NC SOT25 1 NC 2 CATHODE 3 5 AP432/AP432A Rev. 6 3 REF 2 CATHODE 3 CATHODE 2 REF 1 SOT23 SOT23R 1 3 Cathode 2 Anode + TO92-3L Pin Configuration (Top View) CATHODE 1 8 REF ANODE 2 7 ANODE ANODE 3 6 ANODE 4 5 NC NC + ANODE REF + SC-59 ( Package Code-R) ANODE ANODE SOP-8L 4 SC-59 ( Package Code-W) Package 1 REF 2 of 12 www.diodes.com 3 REF 2 CATHODE 3 CATHODE 2 REF ANODE 1 ANODE 1 MARCH 2007 © Diodes Incorporated AP432/AP432A ADJUSTABLE PRECISION SHUNT REGULATOR Typical Application Circuit V OUT V IN + R1 C in + C out A P 432 R2 V O U T = (1+ R 1/R 2)V R E F P recision R egulator Block Diagram REF (R) + Cathode (C) VREF Anode (A) Symbol Cathode (C) REF (R) Anode (A) AP432/AP432A Rev. 6 3 of 12 www.diodes.com MARCH 2007 © Diodes Incorporated AP432/AP432A ADJUSTABLE PRECISION SHUNT REGULATOR Absolute Maximum Ratings Symbol Vcv ICC IREF TOP TST PD Parameter Cathode Voltage Continuous Cathode Current Reference Input Current Operating Temperature Storage Temperature SOT23(R) SOT25 Power Dissipation SC59 (Notes 6, 7) SOP-8L TO92-3L Rating +20 -10 to +250 10 -20 to +85 -65 to +150 250 250 400 600 780 Unit V mA mA o C o C mW mW mW mW mW Note: 6. TJ, max =150°C 7. Ratings apply to ambient temperature at 25°C AP432/AP432A Rev. 6 4 of 12 www.diodes.com MARCH 2007 © Diodes Incorporated AP432/AP432A ADJUSTABLE PRECISION SHUNT REGULATOR Electrical Characteristics Parameter ( TA = 25oC, V+ = +5.0V, unless otherwise stated ) Deviation of Reference Input Voltage over Temperature (Note 8) Test conditions AP432 VKA = Vref, I KA = 10mA (Fig.1) AP432A VKA = VREF , IKA = 10mA , Ta = full range (Fig.1) Ratio of the Change in Reference Voltage to the Change in Cathode Voltage IKA = 10mA (Fig.2) Reference Voltage Reference Input Current Deviation of Reference Input Current over Temperature Minimum Cathode Current for Regulation Off-state Current Dynamic Output Impedance (Note 9) VKA = 20 ~VREF Symbol Unit 1.24 Max. 1.252 1.246 3.0 20 mV -1.4 -2.0 mV/V IREF 1.4 3.5 µA αIREF 0.4 1.2 µA IKA(min) IKA(off) 0.15 0.1 0.3 1.0 mA µA Z KA 0.2 0.5 Ω VREF Min. 1.227 1.233 VREF ∆VREF ∆V Typ. V KA R1 = 10KΩ,R2 = ∞ IKA= 10mA (Fig.2) R1 = 10KΩ,R2 = ∞ IKA = 10mA Ta = Full range (Fig.2) VKA = VREF (Fig.1) VKA = 20V , VREF = 0V (Fig.3) V KA = VREF Frequency ≤ 1KHz (Fig.1) VMAX VDEV = VMAX - VMIN VMIN TI Note: Temperature T2 8. 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. 9. The dynamic output impedance, RZ, is defined as: Note: 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 AP432/AP432A Rev. 6 (1 + R1 ) R2 5 of 12 www.diodes.com MARCH 2007 © Diodes Incorporated AP432/AP432A ADJUSTABLE PRECISION SHUNT REGULATOR Test Circuits Input IN VKA IKA IKA VKA R1 VREF IN R2 VKA IREF VREF IZ(OFF) Note:VKA=VREF(1+R1/R2)+IREFxR1 Fig 1. Test Circuit for VKA= VREF AP432/AP432A Rev. 6 Fig 2. Test Circuit for VKA > VREF 6 of 12 www.diodes.com Fig 3. Test Circuit for Off-State Current MARCH 2007 © Diodes Incorporated AP432/AP432A ADJUSTABLE PRECISION SHUNT REGULATOR Typical Performance Characteristics Small-Signal Voltage Amplification vs Frequency IKA=10mA TA=25oC 50 Output IKA 15KΩ 40 + 9µF 232Ω + - AV-Small Signal Voltage Amplification (dB) 60 30 - 8.25KΩ GND 20 Test Circuit for Voltage Amplification 10 0 10K 1K 100K f-Frequency-Hz 1M 10M Reference Impedance vs Frequency ∣ZKA∣ Reference Impedance (Ω) 100 I KA=10mA o TA =25 C 1KΩ Output I KA 10 50Ω + GND 1 Test Circuit for Reference Impedance 0.1 1K 10K 100K 1M 10M f-Frequency-Hz 150Ω STABILITY BOUNDARY CONDITIONS† 100 90 IKA-Cathode Current-mA 80 TA=25oC A VKA=Vref I KA B VKA=5V C VKA=10V D VKA=15V CL B 50 - C Stable Test Circuit for Curve A A 40 30 D I KA 20 CL 0 0.001 150Ω R1=10KΩ 10 R2 0.01 0.1 1 CL-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 VKA and I KA conditions with CL =0.V BATT and CL were then adjusted to determine the ranges of stability. AP432/AP432A Rev. 6 VBATT Stable 70 60 + 7 of 12 www.diodes.com + - VBATT Test Circuit for Curve B, C, and D MARCH 2007 © Diodes Incorporated AP432/AP432A ADJUSTABLE PRECISION SHUNT REGULATOR Application Examples VIN V IN R CL R R1B R1A ON R2A R2B I OUT V IN + OFF LED on when Low Limit < V < High Limit IN (1+R1B/R2B) Low Limit ≈ V REF (1+R1A/R2A) High Limit ≈ V Delay = RC x ln ( VIN V -V IN ) I OUT = V REF / RCL REF REF Fig. 5 Delay Timer Fig. 4 Voltage Monitor V IN I OUT Fig. 6 Current Limiter or Current Source V IN V OUT VIN R1 R1 R2 R2 RS LIMIT V OUT = (1 + R1/R2) x VREF I OUT = V REF / RS Fig. 7 Constant-Current Sink V OUT PUSE Fig. 8 Higher-Current Shunt Regulator (1 + R1/R2) x VREF Fig. 9 Crow Bar VIN R1A R1B + R2A Low Limit High Limit R2B Output ON when Low Limit <VIN < High Limit V BE V REF (1 + R1B/R2B) +VBE V REF (1 + R1A/R2A) Fig.10 Over-Voltage / Under-Voltage Protection Circuit AP432/AP432A Rev. 6 8 of 12 www.diodes.com MARCH 2007 © Diodes Incorporated AP432/AP432A ADJUSTABLE PRECISION SHUNT REGULATOR Marking Information (1) SOT23(R) /SOT25/SC59 (Top View) Y : Year M : Month (A~L) X : L : Lead Free G :Green XX Y M X Marking Code SOT23(R) /SOT25/SC59 (2) SOP-8L (Top view) 8 5 Accuracy Blank: 1.24 ±1% A: 1.24 ±0.5% Logo AP432 X YY WW X Part Number 4 1 L : Lead-Free Package G : Green WW : Nth week YY : Year SOP-8L (3) TO92-3 (Top View) Accuracy Blank: 1.24 + 1% A: 1.24 + 0.5% AP432 X Y WW X X L : Lead Free Y : Year WW :Nth week X : Internal code TO92-3L AP432/AP432A Rev. 6 9 of 12 www.diodes.com MARCH 2007 © Diodes Incorporated AP432/AP432A ADJUSTABLE PRECISION SHUNT REGULATOR Marking Information (Continued) Marking Code Table Device AP432SA AP432ASA AP432SR AP432ASR AP432Q AP432AQ AP432W AP432AW AP432R AP432AR Package (Note 10) Marking Code Date Code D3 D4 D7 D8 B7 B8 B3 B4 B5 B6 YM YM YM YM YM YM YM YM YM YM SOT23 SOT23 SOT23R SOT23R SOT25 SOT25 SC59 SC59 SC59 SC59 Note: 10. For Packaging Details, go to our website at http://www.diodes.com/datasheets/ap02007.pdf. AP432/AP432A Rev. 6 10 of 12 www.diodes.com MARCH 2007 © Diodes Incorporated AP432/AP432A ADJUSTABLE PRECISION SHUNT REGULATOR Package Information ( All Dimensions in mm ) (1) SOT25 (2) SC59 2.70/3.00 Typ 2.80 TOP VIEW 2.70/ 3.00 1.90 2.90/3.10 Typ 3.00 2.90/3.10 1.00/1.30 Typ 1.10 0.013/0.10 Typ 0.05 1.50/ 1.70 TOP VIEW 1.50/1.70 Typ 1.60 0.35/0.50 1.00/ 1.30 0.10/0.20 Typ 0.15 Typ Typ 0.95 0.55 0.013/0.10 0.35/0.55 Typ 0.40 0.10/0.20 0.95 0.35/0.55 0°/8° (3) SOT23(R) (4) SOP-8L 0.37/0.51 1.20/1.40 2.30/2.50 8 1 5 5.90/6.10 Typ 6.00 ° 4 TOP VIEW 0.45/0.60 0.89/ 1.03 1.80/2.00 9° 1.40/1.50 Typ 1.45 0.45/0.61 R 1 0. 0º/8º AP432/AP432A Rev. 6 0.08/0.25 Typ 0.15 4.85/4.95 Typ 4.90 1.27 11 of 12 www.diodes.com ° ° 45 0.085/0.180 0.35 3 0.013/ 0.10 3.80/3.90 Typ 3.85 4 0.903/ 1.10 2.80/3.00 0.30/0.50 Typ 0.40 (A ll s i de ) ° 3.85/3.95 Typ 3.90 0.60/0.70 Typ 0.65 0.15/0.25 Typ 0.20 0.60/ 0 Typ .80 0. 70 MARCH 2007 © Diodes Incorporated AP432/AP432A ADJUSTABLE PRECISION SHUNT REGULATOR Package Information (Continued) ( All Dimensions in mm ) (5) TO92-3L for Ammo pack IMPORTANT NOTICE Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither does it convey any license under its patent rights, nor the rights of others. The user of products in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on our website, harmless against all damages. LIFE SUPPORT Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the President of Diodes Incorporated. AP432/AP432A Rev. 6 12 of 12 www.diodes.com MARCH 2007 © Diodes Incorporated