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| Precision Adjustable Shunt Reference CORPORATION CL1431 FEATURES DESCRIPTION The CL1431 is an adjustable shunt regulator designed to act as an open-loop error amplifier with a 2.5V temperature compensated reference. Its highly accurate 0.4% bandgap reference is perfect for applications requiring stability and accuracy over temperature and life. Sharp turn-on characteristics and a low temperature coefficient make the CL1431 an excellent replacement for many zener diode applications, programmable to any value greater than 2.5V and up to 36V by using two external resistors. As a combination error amplifier and reference, it can be used to manage control loops such as switching power supplies. The CL1431 can be used as a direct replacement for the standard TL431. ORDERING INFORMATION Part CL1431LP CL1431D CL1431S PIN CONFIGURATION (Top View) Package TO-92 8-Pin Plastic SOIC SOT-89 Temperature Range -55 to 125oC -55 to 125oC -55 to 125oC * * * * * * * Temperature-Compensated: 30ppm/ C Trimmed 0.4% Bandgap Reference Internal Amplifier with 150mA Capability Temperature Range: Extended to -55 to 125oC Low Frequency Dynamic Output Impedance: < 150m Low Output Noise Robust ESD Protection o TO-92 (LP) CATHODE 1 2 3 4 SOIC (D) 8 7 6 5 REFERENCE SOT-89 (S) CATHODE CATHODE ANODE ANODE ANODE N/C 1G-34 ANODE ANODE N/C ANODE REFERENCE 1G-33 REFERENCE 1G-35 CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 CL1431 CORPORATION ABSOLUTE MAXIMUM RATINGS SYMBOL VKA IAK IKA IREF PD PARAMETER Cathode-Anode Reverse Breakdown Anode-Cathode Forward Current Operating Cathode Current Reference Input Current Continuous Power Dissipation at 25 oC TO-92 8L SOIC SOT-89 Junction Temperature Storage Temperature Lead Temperature, Soldering 10 Seconds RATING 37 1 250 10 UNITS V A mA mA 775 750 1000 150 -65 to 150 300 mW mW mW o o o TJ TSTG TL C C C Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. RECOMMENDED CONDITIONS SYMBOL VKA IK PARAMETER Cathode Voltage Cathode Current RATING VREF to 36 10 UNIT V mA TYPICAL THERMAL RESISTANCES PACKAGE TO-92 SOIC SOT-89 JA 160 C/W 175 oC/W 110oC/W o JC 80 C/W 45 oC/W 8oC/W o TYPICAL DERATING 6.3mW/oC 5.7mW/oC 9.1mW/oC FUNCTIONAL BLOCK DIAGRAM CATHODE (K) REFERENCE (R) + - 2.5V ANODE (A) 1G-36 CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 CL1431 CORPORATION ELECTRICAL CHARACTERISTICS Electrical characteristics are guaranteed over full junction temperature range (-55 to 125oC). Ambient temperature must be derated based on power dissipation and package thermal characteristics. The conditions are: VKA = VREF and IK = 10mA unless otherwise stated. SYMBOL VREF TC V REF IREF I REF IK(MIN) IK(OFF) ZKA PARAMETER Reference Voltage VREF with Temp.* Ratio of Change in VREF to Cathode Voltage Reference Input Current IREF Temp Deviation Min I K for Regulation Off State Leakage Dynamic Output Impedance -2 MIN 2.490 2.470 0.06 -1.1 0.7 0.4 0.4 0.04 0.15 1.9 1.2 1 250 0.2 TYP 2.500 MAX 2.510 2.530 0.16 UNIT V V mV/ oC mV/V A A mA nA CIRCUIT 1 1 1 2 2 2 1 3 1 VREF = 0V, VKA = 36V f 1kHz, IK = 1 to 100mA VK = 3V to 36V R1 = 10k; R2 = Over Temp. TEST CONDITION TA = 25oC Over Temp. *CALCULATING AVERAGE TEMPERATURE COEFFICIENT (TC) ppm mV 0 0 5000 0.5 TEST CIRCUITS V IN V KA = V REF I REF TEST CIRCUIT 1 CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 % 0 -10 -20 * TC in mV/oC = V REF T VREF (mV) TA * TC in %/oC = -55 -25 0 25 50 75 100 125 VREF o VREF at 25 C TA x 100 TEMPERATURE (C) 0.06 mV/C 0.002 %/C 24 ppm/C 1J-24 * TC in ppm/ C = o VREF o VREF at 25 C TA x 106 V IN V KA V IN V KA IK IK R1 (V REF ) R2 I REF I K(OFF) 1G-38 1G-39 1G-40 TEST CIRCUIT 2 TEST CIRCUIT 3 CL1431 CORPORATION TYPICAL PERFORMANCE CURVES 900 I K - CATHODE CURRENT (A) 800 700 600 500 400 300 200 100 0 -100 LOW CURRENT OPERATING CHARACTERISTICS VKA = VREF TEMPERATURE RANGE: -55 to 125C 150 I K - CATHODE CURRENT (mA) 125 100 75 50 25 0 -25 -50 -75 HIGH CURRENT OPERATING CHARACTERISTICS VKA = VREF TEMPERATURE RANGE: -55 to 125C 125C 25C -55C -200 -1.0 0 1.0 2.0 3.0 VKA - CATHODE VOLTAGE (V) 1G-41 -100 -2 -1 0 1 2 VKA - CATHODE VOLTAGE (V) 3 1G-42 100 I Z off - OFF STATE CATHODE CURRENT (nA) OFF STATE LEAKAGE VREF - REFERENCE VOLTAGE (V) VKA = 36V VREF = 0V 2.53 REFERENCE VOLTAGE vs AMBIENT TEMPERATURE VKA = VREF 2.52 I K = 10mA 2.51 2.50 2.49 2.48 2.47 2.46 2.45 0 30 60 90 120 -60 -30 TA - AMBIENT TEMPERATURE (C) VREF = 2.500V AT 25C 10 1 0.1 0.01 0 30 60 90 120 -60 -30 TA - AMBIENT TEMPERATURE (C) 1G-43 1J-25 3.0 I REF - REFERENCE INPUT CURRENT (A) REFERENCE INPUT CURRENT VREF - CHANGE IN REFERENCE VOLTAGE (mV) R1 = 10k R2 = 2.5 I K = 10mA 2.0 1.5 1.0 0.5 0 0 30 60 90 120 -60 -30 TA - AMBIENT TEMPERATURE (C) 0 REFERENCE VOLTAGE LINE REGULATION -10 -55C 0C -20 25C 75C 125C -30 -40 I K = 10mA -50 TEMPERATURE RANGE: -55 to 125C 0 1G-45 3 6 9 12 15 18 21 24 27 30 VKA - CATHODE VOLTAGE (V) 1G-46 CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 CL1431 CORPORATION TYPICAL PERFORMANCE CURVES (continued) 70 NOISE VOLTAGE nV/ Hz 60 50 40 30 20 NOISE VOLTAGE Z KA - DYNAMIC IMPEDANCE () 0.150 0.125 0.100 0.075 0.050 0.025 LOW FREQUENCY DYNAMIC OUTPUT IMPEDANCE VKA = VREF I KA = 1 TO 100mA f 1kHz VKA = VREF 10 I K = 10mA TA = 25C 0 100 1k 10k 10 f - FREQUENCY (Hz) 100k 1G-47 0.0 -60 -30 0 30 60 90 120 TA - FREE AIR TEMPERATURE 1G-48 100 Z KA - DYNAMIC IMPEDANCE () DYNAMIC OUTPUT IMPEDANCE TA = 25C I K = 1 TO 100mA 10 1.0 0.1 0.01 1k 10k 100k 1M f - FREQUENCY (Hz) 10M 1G-49 70 A V - SMALL SIGNAL VOLTAGE GAIN (dB) 60 SMALL SIGNAL GAIN vs FREQUENCY TEMPERATURE RANGE: -55 to 125C OUT 15k IK 230 50 I K = 10mA 40 30 20 10 0 1k 9F 8.25k GND 1H-01 10k 100k 1M f - FREQUENCY (Hz) 10M 1J-26 CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 CL1431 CORPORATION TYPICAL PERFORMANCE CURVES (continued) INPUT AND OUTPUT VOLTAGES (V) 6 5 4 3 2 1 0 -1 PULSE RESPONSE INPUT INPUT MONITOR 220 OUT OUTPUT f P = 100kHz 50 GND 1H-03 0 1 2 3 4 5 6 7 8 9 10 11 12 t - TIME (s) 1H-02 100 I K - CATHODE CURRENT (mA) 90 80 70 60 50 40 30 20 10 STABILITY BOUNDARY CONDITIONS A: VKA = VREF B: VKA = 5V AT I K = 10mA C: VKA = 10V AT I K = 10mA D: VKA = 15V AT I K = 10mA 150 IK STABILITY REGION C 10k CL A B TA = 25C D 1H-05 0 100 101 102 103 104 105 106 107 C L - LOAD CAPACITANCE (pF) 1H-04 Information furnished by Calogic is believed to be accurate and reliable. However, no responsibility is assumed for its use: nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent rights of Calogic. CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 |
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