IP431A Series TOP VIEW CATHODE 1 8 REF NC 2 7 NC NC 3 6 ANODE NC 4 5 NC PROGRAMMABLE PRECISION REFERENCE FEATURES • VOLTAGE REFERENCE TOLERANCE ±1% J Package – 8 Pin Ceramic DIP N Package – 8 Pin Plastic DIP • PROGRAMMABLE OUTPUT VOLTAGE TO 36V • EQUIVALENT FULL RANGE TEMPERATURE COEFFICIENT OF 30ppm/°C TYPICAL TOP VIEW CATHODE 1 8 2 7 3 6 4 5 ANODE NC • TEMPERATURE COMPENSATED FOR OPERATION OVER FULL RATED OPERATING TEMPERATURE RANGE REF ANODE • SINK CURRENT CAPABILITY 1 TO 100 mA • FAST TURN–ON RESPONSE NC • LOW DYNAMIC OUTPUT IMPEDANCE Ω typical) (0.2Ω D Package – 8 Pin Plastic (150) SOIC * Note that the SOIC package used for the IP431A has a modified lead frame to increase power dissipation capability when appropriately mounted on a PCB. Part Number IP431AM IP431AI IP431AC J–Pack 8 Pin ✔ ✔ ✔ N–Pack 8 Pin D–Pack 8 Pin ✔ ✔ ✔ ✔ • LOW OUTPUT NOISE VOLTAGE • ALSO AVAILABLE IN TO–92 PACKAGE Amb. Temp. Note: Range -55 to +125°C To order, add the package identifier to the part number. IP431AMJ -40 to +85°C eg. IP431ACD 0 to +70°C ABSOLUTE MAXIMUM RATINGS (Tcase = 25°C unless otherwise stated) VKA Cathode To Anode Voltage IK Cathode Current Range -100 to +150mA IREF Reference Input Current Range -0.05 to +10mA PD Power Dissipation @ TA = 25°C 37V D Package N Package J Package Derate Above 25°C PD Power Dissipation @ TC = 25°C TJ Maximum Operating Junction Temperature TA Operating Ambient Temperature Range TSTG Storage Temperature Range Semelab plc. 0.70W 1.10W 1.25W 6mW/°C D Package N Package J Package Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612. 1.5W 3W 3.3W 150°C See Table Above –65 to 150°C Prelim. 2/95 IP431A Series DESCRIPTION BLOCK DIAGRAM The IP431A circuit is a monolithic three terminal programmable shunt regulator diode. The voltage reference operates as a low temperature coefficient zener which is programmable between VREF (2.5V) and 36 volts using two external resistors. The device has a wide operating current range of 1 mA to 100mA and a typical dynamic impedance of 0.2Ω. Active output circuitry provides a very sharp turn-on characteristic making these devices excellent replacements for zener diodes in many applications. Being a shunt regulator it can be used as either a positive or negative voltage reference. CATHODE REF 2.5 V REF ANODE RECOMMENDED OPERATING CONDITIONS VKA Cathode To Anode Voltage VREF to 36V IK Cathode Current Range 1.0 to 100mA ELECTRICAL CHARACTERISTICS (TA = 25 °C unless otherwise stated) Parameter VREF ∆VREF ∆VREF ∆VKA IREF ∆IREF IMIN Reference Input Voltage (Figure 1) Temperature Range Min. IP431AM Typ. Max. VKA = VREF 2.47 2.495 2.52 IK = 10mA (Figure 1) IK = 10mA Ratio of Reference Voltage Change to Change in Cathode to Anode Voltage (Figure 2) Reference Input Current Deviation Over Temperature Range 2.564 15 -2.7 ∆VKA = 36V to 10V -0.7 -2 R1 = 10kΩ R2 = ∞ 1 IK = 10mA TA = -55 to +125°C * R1 = 10kΩ R2 = ∞ (Figure 1) IOFF Off–State Cathode Current (Figure 3) VKA = 36V |Zka| Dynamic Impedance 2 (Figure 1) VKA = VREF V mV/V TA = -55 to +125°C * VKA = VREF For Regulation Units mV 44 -1.5 (Figure 2) IK = 10mA Minimum Cathode Current TA = -55 to +125°C * 2.426 ∆VKA = 10V to VREF IK = 10mA (Figure 2) Reference Input Current TA = -55 to +125°C * VKA = VREF Reference Input Voltage Over 1 Test Conditions VREF = 0 f ≤ 1kHz ∆IK = 1mA to 100mA 4 µA 7 1 3 µA 0.5 1 mA 3 1000 nA 0.2 0.5 Ω * This test is not applicable to surface mount (D Package) devices. Semelab plc. Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612. Prelim. 2/95 IP431A Series ELECTRICAL CHARACTERISTICS (TA = 25 °C unless otherwise stated) Parameter VREF ∆VREF ∆VREF ∆VKA IREF ∆IREF IMIN Reference Input Voltage (Figure 1) Min. IP431AI Typ. Max. VKA = VREF 2.47 2.495 2.52 IK = 10mA (Figure 1) IK = 10mA Ratio of Reference Voltage Change to Change in Cathode to Anode Voltage (Figure 2) Reference Input Current Deviation Over Minimum Cathode Current 1 IK = 10mA TA = -40 to +85°C * R1 = 10kΩ R2 = ∞ (Figure 3) VKA = 36V |Zka| Dynamic Impedance 2 (Figure 1) ∆VREF ∆VREF ∆VKA IREF ∆IREF IMIN (Figure 1) Temperature Range Reference Input Current Deviation Over 4 µA f ≤ 1kHz 0.8 2.5 µA 0.5 1 mA 3 1000 nA 0.2 0.5 Ω Units IP431AC Typ. Max. VKA = VREF 2.47 2.495 2.52 IK = 10mA TA = 0 to +70°C * TA = 0 to +70°C * 2.453 2.537 3 -1.5 -2.7 ∆VKA = 36V to 10V -0.7 -2 R1 = 10kΩ R2 = ∞ 1 IK = 10mA TA = 0 to +70°C * R1 = 10kΩ R2 = ∞ mV/V TA = 0 to +70°C * VKA = VREF For Regulation (Figure 1) IOFF Off–State Cathode Current (Figure 3) VKA = 36V |Zka| Dynamic Impedance 2 (Figure 1) VKA = VREF V mV 17 ∆VKA = 10V to VREF IK = 10mA (Figure 2) IK = 10mA Minimum Cathode Current -2 Min. (Figure 2) (Figure 2) -2.7 Test Conditions (Figure 1) IK = 10mA Change in Cathode to Anode Voltage Temperature Range VREF = 0 ∆IK = 1mA to 100mA Ratio of Reference Voltage Change to Reference Input Current TA = -40 to +85°C * VKA = VREF Reference Input Voltage Over 1 VKA = VREF V mV 30 6.5 VKA = VREF Off–State Cathode Current Units mV/V R2 = ∞ IOFF Reference Input Voltage -1.5 R1 = 10kΩ (Figure 1) VREF 7 TA = -40 to +85°C * -0.7 For Regulation Parameter 2.55 ∆VKA = 36V to 10V (Figure 2) IK = 10mA Temperature Range 2.44 ∆VKA = 10V to VREF IK = 10mA (Figure 2) Reference Input Current TA = -40 to +85°C * VKA = VREF Reference Input Voltage Over Temperature Range 1 Test Conditions VREF = 0 f ≤ 1kHz ∆IK = 1mA to 100mA 4 µA 5.2 0.4 1.2 µA 0.5 1 mA 3 1000 nA 0.2 0.5 Ω * This test is not applicable to surface mount (D Package) devices. Semelab plc. Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612. Prelim. 2/95 IP431A Series FIGURE 1 TEST CIRCUIT FOR VKA = VREF Input V KA NOTE 1 The deviation parameter ∆VREF is defined as the differences between the maximum and minimum values obtained over the full operating ambient temperature range that applies. IK V REF Max V REF ∆VREF = VREF Max VREF Min V REF Min ∆TA = T2 - T1 T1 FIGURE 2 TEST CIRCUIT FOR VKA > VREF Input V KA IK I REF T2 AMBIENT TEMPERATURE The average temperature coefficient of the reference input voltage, ∝VREF is defined as: ∆VREF 6 ppm VREF @ 25°C x 10 ∆VREF x 106 ∝VREF = = = °C ∆TA ∆TA (VREF @ 25°C) ( ) V REF ∝VREF can be positive or negative depending on whether ∝VREF Min or ∝VREF Max occurs at the lower ambient temperature. ( VKA = VREF 1+ R1 R2 )+I REF x R1 Example: FIGURE 3 TEST CIRCUIT FOR Ioff ∆VREF = 8.0 mV and slope is positive, VREF @ 25°C = 2.495V, ∆TA = 70°C ∝VREF = 0.008 x 106 = 45.8 ppm/°C = 45.8 ppm/°C 70 (2.495) NOTE 2 Input I off V KA The dynamic impedance Zka is defined as: ∆VKA |Zka| = ∆IK When the device is programmed with two external resistors, R1 and R2, (refer to Figure 2) the total dynamic impedance of the circuit is defined as: ( |Zka| ≈ |Zka| 1+ R1 R2 Semelab plc. Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612. ) Prelim. 2/95 IP431A Series TYPICAL APPLICATIONS CONSTANT CURRENT SOURCE CONSTANT CURRENT SINK V+ RCL V+ I SINK I OUT I SINK = I OUT = VREF RCL VREF RS RS SHUNT REGULATOR V+ HIGH CURRENT SHUNT REGULATOR VOUT V+ VOUT R1 R1 R2 R2 VOUT = 1+ R1 R2 VREF VOUT = 1+ OUTPUT CONTROL OF A THREE-TERMINAL FIXED REGULATOR R1 R2 VREF SERIES PASS REGULATOR IP7805 V+ IN VOUT OUT V+ VOUT COMMON VOUT = 1+ R1 R2 R1 R1 R2 R2 VREF VOUT(min) = VREF + 5V Semelab plc. Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612. VOUT = 1+ R1 R2 VREF VOUT(min) = VREF + VBE Prelim. 2/95 IP431A Series TYPICAL APPLICATIONS TRIAC CROWBAR V+ THYRISTOR CROWBAR VOUT VOUT(trip) = 1+ R1 R2 V+ VOUT R1 R1 R2 R2 VOUT(trip) = 1+ VREF VREF SINGLE SUPPLY COMPARATOR WITH TEMPERATURE COMPENSATED THRESHOLD VOLTAGE MONITOR V+ V+ VOUT R1 R1 R2 R3 VOUT VIN R2 R4 LED is ‘on’ when V+ is between the upper and lower limits. VTH = V REF R1 VREF R2 Lower Limit = 1+ Upper Limit = R3 VREF 1+ R4 VIN VOUT < V REF V+ > V REF = 2.0 V THERMAL CHARACTERISTICS RθJA Thermal Resistance, Junction – Ambient D Package N Package J Package 178°C/W 114°C/W 100°C/W RθJC Thermal Resistance, Junction – Case D Package N Package J Package 83°C/W 41°C/W 38°C/W Semelab plc. Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612. Prelim. 2/95 IP431A Series TYPICAL PERFORMANCE CHARACTERISTICS CATHODE CURRENT vs CATHODE VOLTAGE CATHODE CURRENT vs CATHODE VOLTAGE 150 800 VK A = VR E F VK A = VR E F 100 TA = 25˚ C INPUT IK I K CA THODE CURRENT ( µA) I K CATHODE CURRENT (m A) TA = 25˚ C VK A 50 0 -50 -100 IK VK A 400 200 0 -200 -2 -1 0 1 2 3 -1 0 1 2 3 VKA CATHODE VOLTAGE (V) VKA CATHODE VOLTAGE (V) REFERENCE INPUT VOLTAGE vs AMBIENT TEMPERATURE REFERENCE INPUT CURRENT vs AMBIENT TEMPERATURE 1.50 2600 VK A = VR EF 2580 IK = 10mA INPUT IK 1.25 VK A V REF REFERE NCE INP UT VO LTAGE (m V) 2560 V REF REFERE NCE INP UT VO LTAGE (m V) INPUT 600 2540 VR E F 2520 2500 2480 2460 2440 1.00 0.75 IIKK== 10mA 10mA 0.50 VK A INPUT 10 kΩ 0.25 IK IR E F 2420 2400 -55 -25 0 TA 25 50 75 100 0.00 -55 125 TA CHANGE IN REFERENCE INPUT VOLTAGE vs AMBIENT TEMPERATURE 0 25 50 75 100 125 AMBIENT TEMPERATURE (˚C) OFF –STATE CATHODE CURRENT vs AMBIENT TEMPERATURE 0 1000 I K = 10mA TA = 25˚ C VK A = 36V VR E F = 0 VK A INPUT -8 I OFF OFF–STA TE CATHODE CURRE NT (nA) -4 V REF R EFERENCE INPUT VO LTAGE (m V) -25 AMBIENT TEMPERATURE (˚C) IK R1 -12 R2 IR E F VR E F -16 -20 -24 100 INPUT IO F F VK A 10 1 0.1 -28 -32 0 10 20 30 40 0.01 -55 VKA CATHODE VOLTAGE (V) Semelab plc. Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612. -25 TA 0 25 50 75 100 125 AMBIENT TEMPERATURE (˚C) Prelim. 2/95