ZR431F01-7

ZR431 ADJUSTABLE PRECISION ZENER SHUNT REGULATOR Description Pin Assignments ADVANCE INFORMATION The ZR431 is a three terminal adjustable shunt regulator offering excellent temperature stability and output current handling capability up to 100mA. The output voltage may be set to any chosen voltage between 2.5 and 20 volts by selection of two external divider resistors. (Top View) (Top View) VZ 1 VREF 3 1 GND The devices can be used as a replacement for zener diodes in many applications requiring an improvement in zener performance. VZ SOT223 Pin 4 floating or connected to pin 2 Features Surface mount SOT223 and SOT23 packages 2%, 1 % and 0.5% tolerance Max. temperature coefficient 55 ppm/°C Temperature compensated for operation over the full temperature range Programmable output voltage 50μA to 100mA current sink capability Low output noise • All package options available in “Green” Molding Compound (No Br, Sb) and Lead Free Finish/ RoHS Compliant (Note 1) Notes: 4 GND VREF 3 2 SOT23 • • • • • • • • GND 2 Applications • • • • • Shunt regulator Series regulator Voltage monitor Over voltage/ under voltage protection Switch mode power supplies 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html. Typical Application Circuit VZ VREF   + GND ZR431 Document number: DS33255 Rev. 6 - 2 1 of 9 www.diodes.com October 2011 © Diodes Incorporated ZR431 ADJUSTABLE PRECISION ZENER SHUNT REGULATOR Absolute Maximum Ratings (Note 2) Symbol ADVANCE INFORMATION VZ Parameter IZ Cathode Current TA Operating Temperature TST Storage Temperature PD Notes: Rating Unit 20 V 150 mA Cathode Voltage -40 to +85 ° -55 to +125 ° SOT23 SOT223 Power Dissipation (Notes 3, 4) C C 330 2 mW W 2. Operation above the absolute maximum rating may cause device failure. Operation at the absolute maximum ratings, for extended periods, may reduce device reliability. Unless otherwise stated voltages specified are relative to the ANODE pin. 3. TJ, max =150°C. 4. Ratings apply to ambient temperature at 25°C. Recommended Operating Conditions (TA = 25°C) Symbol Parameter Min Max Unit VZ Cathode Voltage VREF 20 V IZ Cathode Current 0.05 100 mA Electrical Characteristics (TA = 25°C unless otherwise specified) Symbol Parameter Reference voltage (Note 5) VREF Test Conditions 2% 1% 0.5% IL = 10mA (Fig 1), VZ = VREF Deviation of reference input voltage IL = 10mA, VZ = VREF over temperature TA = Full range (Fig 1) VDEV ΔVREF ΔVZ Ratio of the change in reference voltage to the change in cathode voltage VZ from VREF to 10V IZ = 10mA (fig 2) VZ from 10V to 20V IZ = 10mA (Fig 2) IREF Min Typ. Max Unit 2.45 2.475 2.487 2.50 2.50 2.50 2.55 2.525 2.513 V 8.0 17 mV -1.85 -2.7 mV/V -1.0 -2.0 0.12 1.0 μA 0.04 0.2 μA 35 50 µA Reference input current R1 = 10k, R2 = O/C, IL = 10mA (Fig 2) ΔIREF Deviation of reference input current over temperature R1 = 10k, R2 = O/C, IL = 10mA IZ(MIN) Minimum cathode current for regulation VZ = VREF (Fig 1) IZ(OFF) Off-state current VZ = 20V, VREF = 0V (Fig 3) 0.1 μA Dynamic output impedance VZ = VREF (Fig 1), f = 0Hz 0.75 Ω RZ Note 5: TA = Full range (Fig 2) 0.5% and 1% SOT23 only For definitions of reference voltage temperature coefficient and dynamic output impedance see NOTES following DC TEST CIRCUITS ZR431 Document number: DS33255 Rev. 6 - 2 2 of 9 www.diodes.com October 2011 © Diodes Incorporated ZR431 ADJUSTABLE PRECISION ZENER SHUNT REGULATOR DC Test Circuits IL IL VZ Input VZ Input VZ Input ADVANCE INFORMATION IZOFF IZ IREF R1 R2 VREF Fig. 1 Test Circuit for VZ = VREF IZ IREF VREF Fig. 2 Test Circuit for VZ > VREF Fig.3 Test Circuit for Off State Current Deviation of reference input voltage, VDEV, is defined as the maximum variation of the reference input voltage over the full temperature range. The average temperature coefficient of the reference input voltage, VREF is defined as: VMAX Vref (ppm / o C) = Vdev × 1000000 Vref (T1 − T2) The dynamic output impedance, RZ is defined as: Rz = VDEV = VMAX - VMIN VMIN ΔV z ΔI z When the device is programmed with two external resistors, R1 and R2, (Fig 2), the dynamic output impedance of the overall circuit, R’, is defined as: R′ = R z (1 + T1 Temperature ZR431 Document number: DS33255 Rev. 6 - 2 R1 ) R2 T2 3 of 9 www.diodes.com October 2011 © Diodes Incorporated ZR431 ADJUSTABLE PRECISION ZENER SHUNT REGULATOR Typical Characteristics 160 REFERENCE CURRENT (nA) ADVANCE INFORMATION 140 140 130 120 110 100 -40 CHANGE in REFERENCE OUTPUT VOLTAGE (mV) 0 VREF = VZ IZ = 10mA -10 -15 -20 5 10 15 CATHODE VOLTAGE (V) Change in VREF vs. Cathode Voltage 20 100 VREF = VZ 36 DYNAMIC IMPEDANCE (Ω) MINIMUM CATHODE CURRENT (µA) -5 -25 0 20 40 60 80 TEMPERATURE (°C) Reference Current vs. Temperature -20 38 34 32 30 28 10 1.0 26 24 -40 0.1 100 0 20 40 60 80 TEMPERATURE (°C) Cathode Current vs. Temperature -20 1k 10k 100k FREQUENCY (Hz) Dynamic Impedance vs. Frequency 1M 2.0 2.506 IZ = 10mA POWER DISSIPATION (W) 2.504 REFERENCE VOLTAGE (V) IZ = 10mA 2.502 2.500 2.498 2.496 2.494 SOT223 1.0 SOT23 2.492 2.490 -40 0 25 -20 20 40 0 60 80 TEMPERATURE (°C) Reference Voltage vs. Temperature ZR431 Document number: DS33255 Rev. 6 - 2 4 of 9 www.diodes.com 50 75 85 AMBIENT TEMPERATURE (°C) Power Dissipation Derating 100 October 2011 © Diodes Incorporated ZR431 ADJUSTABLE PRECISION ZENER SHUNT REGULATOR Typical Characteristics (cont.) 60 ADVANCE INFORMATION OPEN LOOP VOLTAGE GAIN (dB) VZ IZ 230 15k 40 9µF + 20 0 100 - 8k25 1k 10k 100k FREQUENCY (Hz) Gain vs. Frequency 1M IZ = 10mA, TA = 25°C Test Circuit for Open Loop Voltage Gain 220 Input Monitor 3.0 VZ VOLTAGE SWING (V) Repetitive Pulse 2.0 Single Pulse VZ Pulse Generator 1.0 50 0 5.0 INPUT 0 TA = 25°C 0 0.2 0.4 0.6 TIME (µs) Pulse Response 0.8 1.0 Test Circuit for Pulse Response CATHODE CURRENT (mA) 100 Input 80 150 VZ IZ 10k STABLE STABLE 60 40 20 0 10p 100p 1000p 0.01µ 0.1µ LOAD CAPACITANCE (F) Stability Boundary Conditions ZR431 Document number: DS33255 Rev. 6 - 2 VREF < VZ < 20, IZ = 10mA, TA = 25°C 1µ Test Circuit for Stability Boundary Conditions 5 of 9 www.diodes.com October 2011 © Diodes Incorporated ZR431 ADJUSTABLE PRECISION ZENER SHUNT REGULATOR Application Characteristics V+ V+ VOUT VOUT R1 R1 ADVANCE INFORMATION VREF VREF R2 R2 R1 ⎞ ⎛ ⎟V V OUT = ⎜1 + R2 ⎠ REF ⎝ R1 ⎞ ⎛ ⎟V V OUT = ⎜ 1 + R2 ⎠ REF ⎝ SHUNT REGULATOR HIGHER CURRENT SHUNT REGULATOR V+ ZSR*** V+ IN VOUT OUT 30Ω Common R1 0.01µF VREF R1 R2 VOUT VREF R2 VOUT(MIN) = VREF + VREG R1 ⎞ ⎛ ⎟V V OUT = ⎜1 + R 2 ⎠ REF ⎝ R1 ⎞ ⎛ ⎟V V OUT = ⎜ 1 + R2 ⎠ REF ⎝ OUTPUT CONTROL OF A THREE TERMINAL FIXED REGULATOR SERIES REGULATOR V+ V+ R1A R1B VREF OUTPUT OUTPUT VREF INPUT VON ≈ 2V VOFF = V+ R2A R2B VTH = 2.5V SINGLE SUPPLY COMPARATOR WITH TEMPERATURE COMPENSATED THRESHOLD R1B ⎞ ⎛ Low lim it + ⎜ 1 + ⎟ V REF ⎝ R2B ⎠ R1A ⎞ ⎛ High lim it + ⎜ 1 + ⎟ V REF ⎝ R2 A ⎠ OVER VOLTAGE/UNDER VOLTAGE PROTECTION CIRCUIT ZR431 Document number: DS33255 Rev. 6 - 2 6 of 9 www.diodes.com October 2011 © Diodes Incorporated ZR431 ADJUSTABLE PRECISION ZENER SHUNT REGULATOR Ordering Information ADVANCE INFORMATION ZR431 X XXX XX Package Tolerance Packing F : SOT23 G : SOT223 005 : 0.5% 0.1 : 1% Blank : 2% -7: Tape & Reel TA : Tape & Reel 7” Tape and Reel Part Number Quantity Suffix Tolerance Package Code Part Mark Packaging ZR431F005-7 0.5% F 43R SOT23 3000/Tape & Reel -7 ZR431F005TA 0.5% F 43R SOT23 3000/Tape & Reel TA ZR431F01-7 1% F 43B SOT23 3000/Tape & Reel -7 ZR431F01TA 1% F 43B SOT23 3000/Tape & Reel TA ZR431FTA 2% F 43A SOT23 3000/Tape & Reel TA ZR431GTA 2% G ZR431 SOT223 1000/Tape & Reel TA Device ZR431 Document number: DS33255 Rev. 6 - 2 7 of 9 www.diodes.com October 2011 © Diodes Incorporated ZR431 ADJUSTABLE PRECISION ZENER SHUNT REGULATOR Package Outline Dimensions (All Dimensions in mm) (1) Package Type: SOT23 ADVANCE INFORMATION A B C H K M K1 D J F G L SOT23 Dim Min Max Typ A 0.37 0.51 0.40 B 1.20 1.40 1.30 C 2.30 2.50 2.40 D 0.89 1.03 0.915 F 0.45 0.60 0.535 G 1.78 2.05 1.83 H 2.80 3.00 2.90 J 0.013 0.10 0.05 K 0.903 1.10 1.00 K1 0.400 L 0.45 0.61 0.55 M 0.085 0.18 0.11 0° 8° α All Dimensions in mm (2) Package Type: SOT223 SOT223 Dim Min Max Typ A 1.55 1.65 1.60 A1 0.010 0.15 0.05 b1 2.90 3.10 3.00 b2 0.60 0.80 0.70 C 0.20 0.30 0.25 D 6.45 6.55 6.50 E 3.45 3.55 3.50 E1 6.90 7.10 7.00 e — — 4.60 e1 — — 2.30 L 0.85 1.05 0.95 Q 0.84 0.94 0.89 All Dimensions in mm A A1 ZR431 Document number: DS33255 Rev. 6 - 2 8 of 9 www.diodes.com October 2011 © Diodes Incorporated ZR431 ADJUSTABLE PRECISION ZENER SHUNT REGULATOR IMPORTANT NOTICE ADVANCE INFORMATION DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). 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