CP432 Adjustable Precision Shunt Regulator Features General Description - Precision reference voltage CP432 : 1.24V ± 1% CP432A : 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, TO92 The CP432/432A 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. The precise +/- 1% reference voltage tolerance of the CP432/432A 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. Typical Application Circuit VOUT VIN + R1 Cin + Cout CP432 R2 VOUT = (1+R1/R2)VREF Precision Regulator * All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: [email protected] Tel:886-3-3214525 Http: www.ceramate.com.tw Page 1 of 10 Rev 1.1 Jan. 19,2005 Fax:886-3-3521052 CP432 Adjustable Precision Shunt Regulator Symbol Block Diagram Cathode (C) REF (R) + VREF Cathode (C) - 1.24V REF (R) Anode (A) Anode (A) Pin Configuration Order Number Pin Configuration (Top View) 3 Cathode CP432Y CP432AY (SOT89) 1 REF + 3 Cathode + 2 Anode + CP432V CP432AV (TO92) 2 Anode 1 REF Order Number CP432R CP432AR (SOT23) CP432W CP432AW (SOT23) Pin Configuration (Top View) 3 REF Anode 1 2 Cathode 3 Cathode Anode 1 2 REF * All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: [email protected] Tel:886-3-3214525 Http: www.ceramate.com.tw Page 2 of 10 Rev 1.1 Jan. 19,2005 Fax:886-3-3521052 CP432 Adjustable Precision Shunt Regulator Absolute Maximum Ratings Cathode voltage ……………………………....……...........…..........……………………………………...……….20V Continuous cathode current …………………………………......................…………………….... -10mA ~ 250mA Reference input current range ………………………...….………....................……………………….…....... 10mA Operating temperature range (CP432) ………………………………………………………………… -20oC ~ 85oC o (CP432I).……………..…..…............……………………………..……. -40 C~85oC Lead Temperature……………….…………….…..……………………..………………..…….........…............ 260oC Storage Temperature ……………………………..............…......………………….......……............ -65oC ~ 150oC Power Dissipation (Notes 1. 2) SOT89 .……………..……..……………………............….... 0. 80W TO92 .....…………….………………………....……….. ..... 0.78W SOT23. …………………..…..…………………………….…. 0.23W 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, CP432 Reference voltage I KA = 10mA CP432A (Fig.1) Deviation of reference input voltage VKA = VREF , IKA = 10mA , over temperature (Note 3) Ta = full range (Fig.1) Ratio of the change in reference IKA = 10mA voltage to the change in cathode VKA = 20 ~VREF (Fig.2) voltage R1 = 10KΩ,R2 = ∞ Reference input current IKA= 10mA (Fig.2) R1 = 10KΩ,R2 = ∞ Deviation of reference input current IKA = 10mA over temperature Ta = Full range (Fig.2) Minimum cathode current for VKA = VREF (Fig.1) regulation Off-state current VKA = 20V , VREF = 0V (Fig.3) V KA = VREF Dynamic output impedance (Note 4) ∆IKA = 0.1mA ~ 15mA Frequency ≤ 1KHz (Fig.1) Symbol VREF 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 IREF 1.4 3.5 µA αIREF 0.4 1.2 µA IKA(min) 0.15 0.3 mA IKA(off) 0.1 1.0 µA Z KA 0.2 0.5 Ω VREF ∆VREF ∆V KA * All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: [email protected] Tel:886-3-3214525 Http: www.ceramate.com.tw Page 3 of 10 Rev 1.1 Jan. 19,2005 Fax:886-3-3521052 CP432 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 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 * All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: [email protected] Tel:886-3-3214525 Http: www.ceramate.com.tw Page 4 of 10 Rev 1.1 Jan. 19,2005 Fax:886-3-3521052 CP432 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 * All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: [email protected] Tel:886-3-3214525 Http: www.ceramate.com.tw Page 5 of 10 Rev 1.1 Jan. 19,2005 Fax:886-3-3521052 CP432 Adjustable Precision Shunt Regulator Application Examples VIN V IN RCL R R1A 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 VIN IOUT VIN IOUT = VREF / RCL Fig.6 Current Limiter or Current Source VOUT VIN R1 R1 R2 R2 RS LIMIT VOUT = (1 + R1/R2) × VREF IOUT = VREF / RS Fig.7 Constant-Current Sink VOUT PUSE Fig.8 Higher-Current Shunt Regulator (1 + R1/R2) × VREF Fig.9 Crow Bar VIN R1A R1B + R2A Low Limit High Limit R2B Output ON when Low Limint ＜VIN＜High Limit VBE V REF(1 + R1B/R2B) +VBE VREF(1 + R1A/R2A) Fig.10 Over-Voltage / Under-Voltage Protection Circuit * All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: [email protected] Tel:886-3-3214525 Http: www.ceramate.com.tw Page 6 of 10 Rev 1.1 Jan. 19,2005 Fax:886-3-3521052 CP432 Adjustable Precision Shunt Regulator Package Diagrams (1) SOT89-3L Package Outline Dimension L HE E D1 e1 e 50(2x) 0 8 (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 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 * All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: [email protected] Tel:886-3-3214525 Http: www.ceramate.com.tw Page 7 of 10 Rev 1.1 Jan. 19,2005 Fax:886-3-3521052 CP432 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 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 L 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 * All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: [email protected] Tel:886-3-3214525 Http: www.ceramate.com.tw Page 8 of 10 Rev 1.1 Jan. 19,2005 Fax:886-3-3521052 CP432 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 0.35 Nom. 1.20 1.15 0.175 2.90 1.60 2.00 2.70 0.45 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 Dimensions In Inches Min. 0.039 0.000 0.039 0.014 0.004 0.106 0.055 0.067 0.094 0.014 Nom. 0.047 0.045 0.007 0.114 0.063 0.079 0.106 0.018 Max. 0.055 0.004 0.051 0.020 0.010 0.122 0.071 0.091 0.118 0.022 * All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: [email protected] Tel:886-3-3214525 Http: www.ceramate.com.tw Page 9 of 10 Rev 1.1 Jan. 19,2005 Fax:886-3-3521052 CP432 Adjustable Precision Shunt Regulator ■ Taping Specifications For TO-92 package SYMBOL SPECIFICATIONS (mm) SPECIFICATIONS (inch) P 12.7 ± 1.0 0.50 ± 0.07 P0 12.7 ± 1.0 0.50 ± 0.07 P1 3.81 ± 0.4 0.15 ± 0.016 H 21.0~26.0 0.828~1.024 H1 17.0~21.0 0.669~0.828 H2 14.0~18.0 0.551~0.709 H3 3.4 max. 0.125 max. H4 2.5 min. 0.098 min. F 5.08 ± 0.2 0.2 ± 0.008 W 18.0 ± 0.5 0.708 ± 0.020 W1 9.0 ± 0.5 0.354 ±0.020 W2 6.0 ± 0.5 0.236 ±0.020 ΦD0 4.0 ± 0.2 0.157 ± 0.008 E 0.5 max. 0.020 max. * All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: [email protected] Tel:886-3-3214525 Http: www.ceramate.com.tw Page 10 of 10 Rev 1.1 Jan. 19,2005 Fax:886-3-3521052