Advanced Power Electronics Corp. AP432 Adjustable Precision Shunt Regulator Features General Description - Precision reference voltage B : 1.24V ± 1% A : 1.24V ± 0.5% - Sink current capability: 200mA. - Minimum cathode current for regulation: 150µA - Equivalent full-range temp coefficient: 30 ppm/oC - Fast turn-on Response. - Low dynamic output impedance: 0.2Ω - Programmable output voltage to 20v - Low output noise - Packages: SOT89, SOT23, SOT25, SOP8 and TO92 - RoHS Compliant & Halogen Free Product The AP432 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\/ (V REF ) 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. The precise +/- 1% reference voltage tolerance of the AP432 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 Package M G T N Y : SOP-8 : SOT89 : TO92 : SOT23 : SOT25 Reference Voltage Tolerance: A : 1.24V(+/-) 0.5% B : 1.24V(+/-)1% Typical Application Circuit VIN VOUT + R1 Cin + Cout AP432 R2 VOUT = (1+R1/R2)VREF Precision Regulator This datasheet contains new product information. Advanced Power Electronics 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. 1 20130108V3.1 Advanced Power Electronics Corp. AP432 Adjustable Precision Shunt Regulator Block Diagram Symbol Cathode (C) REF (R) + VREF Cathode (C) - 1.24V REF (R) Anode (A) Anode (A) Pin Configuration Order Number Pin Configuration (Top View) Order Number Pin Configuration (Top View) 3 Cathode AP432 G AP432N (SOT-23) 2 Anode (SOT-89) 3 Cathode Anode 1 2 REF 1 REF AP432 T 3 Cathode (TO-92) 2 Anode 1 REF AP432M (SOP-8) (SOT-25) Cathode 1 8 REF Anode 2 7 Anode Anode 3 6 Anode NC 4 5 NC Advanced Power Electronics Corp. www.a-power.com.tw NC 1 NC 12 Cathode 3 AP432Y 5 Anode 4 REF 2 Advanced Power Electronics Corp. AP432 Adjustable Precision Shunt Regulator Absolute Maximum Ratings Cathode Voltage…………....……..............................…..........……………………………………...……….20V Continuous cathode current ………………………………......................……………………...-10mA ~ 250mA Reference input current range ……………………...….………....................………………………………10mA Operating temperature range ............……………………………………………………………… -40 oC ~ 85oC Lead Temperature……………….…………….…..……………………..………………..……........260 o C Storage Temperature ……………………..............…......………………….......……...........-65oC ~ 150oC Power Dissipation (Notes 1. 2) SOT-89 .……………..……..……………………...........….... 0. 80W TO-92.....…………….………………………....……….. ..... 0.78W SOT-23 …………………..…..…………………………….…. 0.25W SOT-25...……………………..………….……………………..0.25W SOP-8...………………….……………………………..……… 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 Symbo l VKA = Vref, -B VREF I KA = 10mA -A (Fig.1) Deviation of Reference Input Voltage VKA = VREF , IKA = 10mA , VREF over Temperature (Note 3) Ta = full range (Fig.1) Ratio of the Change in Reference ∆VREF IKA = 10mA VKA = 20 ~VREF ∆V Voltage to the Change in Cathode (Fig.2) KA Voltage R1 = 10KΩ,R2 = ∞ IREF Reference Input Current IKA= 10mA (Fig.2) R1 = 10KΩ,R2 = ∞ Deviation of Reference Input Current αIREF IKA = 10mA over Temperature Ta = Full range (Fig.2) Minimum Cathode Current for VKA = VREF (Fig.1) IKA(min) Regulation Off-state Current VKA = 20V , VREF = 0V (Fig.3) IKA(off) V = VREF Dynamic Output Impedance (Note 4) KA Z KA Frequency ≤ 1KHz (Fig.1) Reference Voltage Advanced Power Electronics Corp. www.a-power.com.tw Min. 1.227 1.233 Typ. 1.24 Max. 1.252 1.246 Unit V 3.0 20 mV -1.4 -2.0 mV/V 1.4 3.5 µA 0.4 1.2 µA 0.15 0.3 mA 0.1 1.0 µA 0.2 0.5 Ω 3 Advanced Power Electronics Corp. AP432 Adjustable Precision Shunt Regulator VMAX VDEV = VMAX - VMIN VMIN TI T2 TEMPERATURE 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: ( αVREF = VDEV VREF (25°C) ) × 10 6 ……………………..……………….. ( ppm T2 − T1 °C ) 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: ∆ V KA Z KA = ∆ I KA 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: ' ∆v ZKA = ≈ ZKA ∆i (1 + R1 ) R2 Test Circuits Input IN VKA IKA IKA VKA R1 VREF R2 Advanced Power Electronics Corp. www.a-power.com.tw VKA IREF VREF V KA = V REF (1 + Fig1. Test Circuit for V KA= VREF IN IZ(OFF) R1 ) + IREF ⋅ R1 R2 Fig2. Test circuit for V KA＞VREF Fig3. Test Circuit for off-state Current 4 Advanced Power Electronics Corp. AP432 Adjustable Precision Shunt Regulator Typical Performance Characteristics 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 10K 1K 100K 1M f-Frequency-Hz 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 STABILITY BOUNDARY CONDITIONS † 100 90 IKA-Cathode Current-m A 80 150O TA=25 oC A VKA=Vref I KA B VKA=5V C VKA=10V D VKA=15V B Stable 70 60 50 CL + - VBATT C Stable A TEST CIRCUIT FOR CURVE A 40 30 D I KA 20 10 CL 0 0.001 150O R1=10KO 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 CL =0.V BATT and CL were then adjusted to determine the ranges of stability. + - VBATT TEST CIRCUIT FOR CURVE B, C, AND D Advanced Power Electronics Corp. www.a-power.com.tw 5 Advanced Power Electronics Corp. AP432 Adjustable Precision Shunt Regulator Application Examples VIN V IN RCL R R1A VIN R1B 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) ×V REF IOUT = VREF / RS Fig.7 Constant-Current Sink VOUT PUSE Fig.8 Higher-Current Shunt Regulator (1 + R1/R2) ×V REF Fig.9 Crow Bar VIN R1A R1B + R2A Low Limit High Limit R2B Output ON when Low Limint ＜VIN＜High Limit VBE VREF(1 + R1B/R2B) +VBE VREF(1 + R1A/R2A) Fig.10 Over-Voltage / Under-Voltage Protection Circuit Advanced Power Electronics Corp. www.a-power.com.tw 6 Advanced Power Electronics Corp. AP432 MARKING INFORMATION SO-8 Part Number Package Code 432M YWWSSS Date Code (YWWSSS) Y：Last Digit Of The Year WW：Week SSS：Sequence SOT-23-5L Part Number : R2 R2SS Date Code SS:2004,2008,2012… SS:2003,2007,2011… SS:2002,2006,2010… SS:2001,2005,2009… SOT-23 Part Number : R2 R2SS Date Code SS:2004,2008,2012… SS:2003,2007,2011… SS:2002,2006,2010… SS:2001,2005,2009… SOT-89 Part Number Package Code 432G YWWS Date Code (YWWS) Y:Year WW：Week S：Sequence 7 Advanced Power Electronics Corp. AP432 MARKING INFORMATION TO-92 Part Number Package Code 432T YWWS Date Code (YWWS) Y:Year WW：Week S：Sequence 8