Equivalent Full-Range Temperature Coefficient... 0 ppm/ C 0.-Ω Typical Output Impedance Sink-Current Capability...1 ma to 100 ma Low Output Noise Adjustable Output Voltage...V ref to 6 V Available in a Wide Range of High-Density Packages description The and A are three-terminal adjustable shunt regulators with specified thermal stability over applicable automotive, commercial, and military temperature ranges. The output voltage can be set to any value between V ref (approximately.5 V) and 6 V, with two external resistors (see Figure 17). These devices have a typical output impedance of 0. Ω. Active output circuitry provides a very sharp turn-on characteristic, making these devices excellent replacements for Zener diodes in many applications, such as onboard regulation, adjustable power supplies, and switching power supplies. The C and AC are characterized for operation from 0 C to 70 C, and the I and AI are characterized for operation from 40 C to 85 C. CATHODE NC CATHODE NC NC NC NC NC CATHODE D PACKAGE (TOP VIEW) 1 4 1 4 8 7 6 5 P OR PW PACKAGE (TOP VIEW) 8 7 6 5 DBV PACKAGE (TOP VIEW) 1 NC No internal connection 5 4 KTP PACKAGE (TOP VIEW) REF NC REF NC NC REF CATHODE REF LP PACKAGE (TOP VIEW) CATHODE REF PK PACKAGE (TOP VIEW) REF CATHODE Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright 000, Texas Instruments Incorporated POST OFFICE BOX 6550 DALLAS, TEXAS 7565 1
AVAILABLE OPTIONS PACKAGED DEVICES TA SMALL- OUTLINE (D) SOT- (DBV) PLASTIC FLANGE MOUNT (KTP) TO-6AA (LP) PLASTIC DIP (P) PLASTIC SHRINK SMALL-OUTLINE (PW) SOT-89 (PK) 0 C to 70 C CD ACD CDBVR CKTPR CLP ACLP CP ACP CPWR ACPWR CPKR 40 C to 85 C ID AID ILP AILP IP AIP IPKR The D, LP, and PW packages are available taped and reeled. The DBV, KTP, and PK packages are only available taped and reeled. Add the suffix R to device type (e.g., CDR). symbol REF CATHODE functional block diagram CATHODE REF + _ Vref equivalent schematic CATHODE 800 Ω 800 Ω REF 0 pf 150 Ω.8 kω 4 kω 10 kω.4 kω 7. kω 0 pf 1 kω All component values are nominal. 800 Ω POST OFFICE BOX 6550 DALLAS, TEXAS 7565
absolute maximum ratings over operating free-air temperature range (unless otherwise noted) Cathode voltage, V KA (see Note 1)........................................................... 7 V Continuous cathode current range, I KA......................................... 100 ma to 150 ma Reference input current range.................................................... 50 µa to 10 ma Package thermal impedance, θ JA (see Notes and ): D package............................ 97 C/W DBV package........................ 06 C/W KTP package......................... 8 C/W LP package.......................... 156 C/W P package............................ 85 C/W PK package........................... 5 C/W PW package......................... 149 C/W Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds............................... 60 C Storage temperature range, T stg................................................... 65 C to 150 C Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. Voltage values are with respect to the anode terminal unless otherwise noted.. Maximum power dissipation is a function of TJ(max), θ JA, and TA. The maximum allowable power dissipation at any allowable ambient temperature is PD = (TJ(max) TA)/θ JA. Operating at the absolute maximum TJ of 150 C can affect reliability.. The package thermal impedance is calculated in accordance with JESD 51-7. recommended operating conditions MIN MAX UNIT Cathode voltage, VKA Vref 6 V Cathode current, IKA 1 100 ma Operating free-air temperature range, TA C, AC 0 70 I, AI 40 85 C POST OFFICE BOX 6550 DALLAS, TEXAS 7565
electrical characteristics over recommended operating conditions, T A = 5 C (unless otherwise noted) PARAMETER TEST CIRCUIT TEST CONDITIONS C MIN TYP MAX Vref Reference voltage VKA = Vref, IKA = 10 ma 440 495 550 mv VI(dev) Deviation of reference voltage over full temperature range (see Figure 1) V ref Ratio of change in reference voltage V KA to the change in cathode voltage VKA = Vref, IKA = 10 ma, TA = 0 C to 70 C IKA =10mA UNIT 4 5 mv VKA = 10 V Vref 1.4.7 VKA = 6 V 10 V 1 Iref Reference current IKA = 10 ma, R1 = 10 kω, R = 4 µa II(dev) Imin Deviation of reference current over full temperature range (see Figure 1) Minimum cathode current for regulation IKA = 10 ma, R1 = 10 kω, R =, TA = 0 C to 70 C mv V 0.4 1. µa VKA = Vref 0.4 1 ma Ioff Off-state cathode current 4 VKA = 6 V, Vref = 0 0.1 1 µa zka Dynamic impedance (see Figure 1) 1 IKA = 1 ma to 100 ma, VKA = Vref, f 1 khz 0. 0.5 Ω The deviation parameters V ref(dev) and I ref(dev) are defined as the differences between the maximum and minimum values obtained over the recommended temperature range. The average full-range temperature coefficient of the reference voltage, α Vref, is defined as: # Maximum Vref Minimum Vref VI(dev) TA where: T A is the recommended operating free-air temperature range of the device. α Vref can be positive or negative, depending on whether minimum V ref or maximum V ref, respectively, occurs at the lower temperature. Example: maximum V ref = 496 mv at 0 C, minimum V ref = 49 mv at 0 C, V ref = 495 mv at 5 C, T A = 70 C for C # Vref #.ppm Vref # VI(dev).. 10 V at ref 5 C. 6 C. 4mV 495 mv. 10 6 70 C T A ppm C Because minimum V ref occurs at the lower temperature, the coefficient is positive. Calculating Dynamic Impedance The dynamic impedance is defined as: #z KA # V KA I KA When the device is operating with two external resistors (see Figure ), the total dynamic impedance of the circuit is given by: z V I #z KA #.1 R1 R. Figure 1. Calculating Deviation Parameters and Dynamic Impedance 4 POST OFFICE BOX 6550 DALLAS, TEXAS 7565
electrical characteristics over recommended operating conditions, T A = 5 C (unless otherwise noted) PARAMETER TEST CIRCUIT TEST CONDITIONS I MIN TYP MAX Vref Reference voltage VKA = Vref, IKA = 10 ma 440 495 550 mv VI(dev) Deviation of reference voltage over full temperature range (see Figure 1) V ref Ratio of change in reference voltage V KA to the change in cathode voltage VKA = Vref, IKA = 10 ma, TA = 40 C to 85 C IKA =10mA UNIT 5 50 mv VKA = 10 V Vref 1.4.7 VKA = 6 V 10 V 1 Iref Reference current IKA = 10 ma, R1 = 10 kω, R = 4 µa II(dev) Imin Deviation of reference current over full temperature range (see Figure 1) Minimum cathode current for regulation IKA = 10 ma, R1 = 10 kω, R =, TA = 40 C to 85 C mv V 0.8.5 µa VKA = Vref 0.4 1 ma Ioff Off-state cathode current 4 VKA = 6 V, Vref = 0 0.1 1 µa zka Dynamic impedance (see Figure 1) IKA = 1 ma to 100 ma, VKA = Vref, f 1 khz 0. 0.5 Ω electrical characteristics over recommended operating conditions, T A = 5 C (unless otherwise noted) PARAMETER TEST CIRCUIT TEST CONDITIONS AC MIN TYP MAX Vref Reference voltage VKA = Vref, IKA = 10 ma 470 495 50 mv VI(dev) Deviation of reference voltage over full temperature range (see Figure 1) V ref Ratio of change in reference voltage V KA to the change in cathode voltage VKA = Vref, IKA = 10 ma, TA = 0 C to 70 C IKA =10mA UNIT 4 5 mv VKA = 10 V Vref 1.4.7 VKA = 6 V 10 V 1 Iref Reference current IKA = 10 ma, R1 = 10 kω, R = 4 µa II(dev) Imin Deviation of reference current over full temperature range (see Figure 1) Minimum cathode current for regulation IKA = 10 ma, R1 = 10 kω, R =, TA = 0 C to 70 C mv V 0.8 1. µa VKA = Vref 0.4 0.6 ma Ioff Off-state cathode current 4 VKA = 6 V, Vref = 0 0.1 0.5 µa zka Dynamic impedance (see Figure 1) 1 IKA = 1 ma to 100 ma, VKA = Vref, f 1 khz 0. 0.5 Ω POST OFFICE BOX 6550 DALLAS, TEXAS 7565 5
electrical characteristics over recommended operating conditions, T A = 5 C (unless otherwise noted) PARAMETER TEST CIRCUIT TEST CONDITIONS AI MIN TYP MAX Vref Reference voltage VKA = Vref, IKA = 10 ma 470 495 50 mv VI(dev) Deviation of reference voltage over full temperature range (see Figure 1) V ref Ratio of change in reference voltage V to the change in cathode voltage KA VKA = Vref, IKA = 10 ma, TA = 40 C to 85 C IKA =10mA UNIT 5 50 mv VKA = 10 V Vref 1.4.7 VKA = 6 V 10 V 1 Iref Reference current IKA = 10 ma, R1 = 10 kω, R = 4 µa II(dev) Imin Deviation of reference current over full temperature range (see Figure 1) Minimum cathode current for regulation IKA = 10 ma, R1 = 10 kω, R =, TA = 40 C to 85 C mv V 0.8.5 µa VKA = Vref 0.4 0.7 ma Ioff Off-state cathode current 4 VKA = 6 V, Vref = 0 0.1 0.5 µa zka Dynamic impedance (see Figure 1) IKA = 1 ma to 100 ma, VKA = Vref, f 1 khz 0. 0.5 Ω 6 POST OFFICE BOX 6550 DALLAS, TEXAS 7565
PARAMETER MEASUREMENT INFORMATION Input VKA IKA Vref Figure. Test Circuit for V KA = V ref Input VKA IKA R1 Iref R Vref V KA V ref.1 R1 R. I ref R1 Figure. Test Circuit for V KA > V ref Input Ioff VKA Figure 4. Test Circuit for I off POST OFFICE BOX 6550 DALLAS, TEXAS 7565 7
TYPICAL CHARACTERISTICS Table 1. Graphs FIGURE Reference input voltage vs Free-air temperature 5 Reference input current vs Free-air temperature 6 Cathode current vs Cathode voltage 7, 8 Off-state cathode current vs Free-air temperature 9 Ratio of delta reference voltage to change in cathode voltage vs Free-air temperature 10 Equivalent input noise voltage vs Frequency 11 Equivalent input noise voltage over a 10-second period 1 Small-signal voltage amplification vs Frequency 1 Reference impedance vs Frequency 14 Pulse response 15 Stability boundary conditions 16 Table. Application Circuits FIGURE Shunt regulator 17 Single-supply comparator with temperature-compensated threshold 18 Precision high-current series regulator 19 Output control of a three-terminal fixed regulator 0 High-current shunt regulator 1 Crowbar circuit Precision 5-V 1.5-A regulator Efficient 5-V precision regulator 4 PWM converter with reference 5 Voltage monitor 6 Delay timer 7 Precision current limiter 8 Precision constant-current sink 9 8 POST OFFICE BOX 6550 DALLAS, TEXAS 7565
TYPICAL CHARACTERISTICS Reference Voltage mv V ref 600 580 560 540 50 500 480 460 440 40 VKA = Vref IKA = 10 ma REFERENCE VOLTAGE vs FREE-AIR TEMPERATURE Vref = 550 mv Vref = 495 mv Vref = 440 mv I ref Reference Current µ A 5 4 1 R1 = 10 kω R = IKA = 10 ma REFERENCE CURRENT vs FREE-AIR TEMPERATURE 400 75 50 5 0 5 50 75 TA Free-Air Temperature C Data is for devices having the indicated value of Vref at IKA = 10 ma, TA = 5 C. Figure 5 100 15 0 75 50 5 0 5 50 75 TA Free-Air Temperature C Figure 6 100 15 150 15 VKA = Vref TA = 5 C CATHODE CURRENT vs CATHODE VOLTAGE 800 VKA = Vref TA = 5 C CATHODE CURRENT vs CATHODE VOLTAGE Cathode Current ma I KA 100 75 50 5 0 5 50 I KA Cathode Current µ A 600 400 00 0 Imin 75 100 1 0 1 VKA Cathode Voltage V Figure 7 00 1 0 1 VKA Cathode Voltage V Figure 8 Data at high and low temperatures are applicable only within the recommended operating free-air temperature ranges of the various devices. POST OFFICE BOX 6550 DALLAS, TEXAS 7565 9
TYPICAL CHARACTERISTICS I off Off-State Cathode Current µ A.5 1.5 1 0.5 OFF-STATE CATHODE CURRENT vs FREE-AIR TEMPERATURE VKA = 6 V Vref = 0 V ref / V KA mv/v RATIO OF DELTA REFERENCE VOLTAGE TO DELTA CATHODE VOLTAGE vs FREE-AIR TEMPERATURE 0.85 0.95 1.05 1.15 1.5 1.5 VKA = V to 6 V 0 75 50 5 0 5 50 75 TA Free-Air Temperature C Figure 9 100 15 1.45 75 50 5 0 5 50 75 100 15 TA Free-Air Temperature C Figure 10 Equivalent Input Noise Voltage nv/ Hz 60 40 0 00 180 160 140 10 EQUIVALENT INPUT NOISE VOLTAGE vs FREQUENCY IO = 10 ma TA = 5 C V n 100 10 100 1 k f Frequency Hz Figure 11 10 k 100 k Data at high and low temperatures are applicable only within the recommended operating free-air temperature ranges of the various devices. 10 POST OFFICE BOX 6550 DALLAS, TEXAS 7565
19.1 V Equivalent Input Noise Voltage µv V n 6 5 4 1 0 1 TYPICAL CHARACTERISTICS EQUIVALENT INPUT NOISE VOLTAGE OVER A 10-SECOND PERIOD 4 5 f = 0.1 to 10 Hz IKA = 10 ma TA = 5 C 6 0 1 4 5 6 t Time s 7 8 9 10 1 kω 500 µf 910 Ω 000 µf (DUT) 80 Ω 16 Ω 0.1 µf + 160 kω VCC TLE07 AV = 10 V/mV 16 kω 16 kω 1 µf 1 µf kω kω + VCC TLE07 AV = V/V To Oscilloscope µf VEE VEE Figure 1. Test Circuit for Equivalent Input Noise Voltage POST OFFICE BOX 6550 DALLAS, TEXAS 7565 11
TYPICAL CHARACTERISTICS Small-Signal Voltage Amplification db 60 50 40 0 0 10 SMALL-SIGNAL VOLTAGE AMPLIFICATION vs FREQUENCY IKA = 10 ma TA = 5 C Output IKA 15 kω Ω 9 µf + 8.5 kω GND TEST CIRCUIT FOR VOLTAGE AMPLIFICATION A V 0 1 k 10 k 100 k 1 M 10 M f Frequency Hz Figure 1 z KA Reference Impedance Ω 100 10 1 IKA = 10 ma TA = 5 C REFERENCE IMPEDANCE vs FREQUENCY 1 kω Output IKA 50 Ω + GND TEST CIRCUIT FOR REFERENCE IMPEDANCE 0.1 1 k 10 k 100 k 1 M 10 M f Frequency Hz Figure 14 1 POST OFFICE BOX 6550 DALLAS, TEXAS 7565
TYPICAL CHARACTERISTICS PULSE RESPONSE Input and Output Voltage V 6 5 4 1 TA = 5 C Input Output Pulse Generator f = 100 khz 0 Ω 50 Ω Output GND TEST CIRCUIT FOR PULSE RESPONSE 0 1 0 1 4 t Time µs 5 6 7 Figure 15 Cathode Current ma I KA 100 90 80 70 60 50 40 0 0 STABILITY BOUNDARY CONDITIONS A VKA = Vref B VKA = 5 V C VKA = 10 V D VKA = 15 Vf Stable A B D C TA = 5 C Stable 150 Ω IKA + CL VBATT TEST CIRCUIT FOR CURVE A IKA R1 = 10 kω 150 Ω 10 0 0.001 0.01 0.1 1 CL Load Capacitance µf The areas under the curves represent conditions that may cause the device to oscillate. For curves B, C, and D, R and V+ were adjusted to establish the initial VKA and IKA conditions with CL = 0. VBATT and CL then were adjusted to determine the ranges of stability. 10 CL + R VBATT TEST CIRCUIT FOR CURVES B, C, AND D Figure 16 POST OFFICE BOX 6550 DALLAS, TEXAS 7565 1
APPLICATION INFORMATION R (see Note A) Vref R1 R VO RETURN NOTE A: R should provide cathode current 1 ma to the at minimum. V O.1 R1 R.V ref Figure 17. Shunt Regulator Input VIT.5 V VO Von V Voff GND Figure 18. Single-Supply Comparator With Temperature-Compensated Threshold R (see Note A) N 0 Ω N R 0.01 µf R1 4.7 kω VO V O.1 R1 R.V ref NOTE A: R should provide cathode current 1 ma to the at minimum. Figure 19. Precision High-Current Series Regulator 14 POST OFFICE BOX 6550 DALLAS, TEXAS 7565
APPLICATION INFORMATION IN ua7805 OUT VO Common R1 R V O.1 R1 R.V ref Minimum V O V ref 5V Figure 0. Output Control of a Three-Terminal Fixed Regulator VO R1 V O.1 R1 R.V ref R Figure 1. High-Current Shunt Regulator VO R1 R C (see Note A) NOTE A: Refer to the stability boundary conditions in Figure 16 to determine allowable values for C. Figure. Crowbar Circuit POST OFFICE BOX 6550 DALLAS, TEXAS 7565 15
APPLICATION INFORMATION IN OUT LM17 8. kω Adjust 4 Ω VO 5 V, 1.5 A 4 Ω Figure. Precision 5-V 1.5-A Regulator Rb (see Note A) 7.4 kω VO 5 V 7.4 kω NOTE A: Rb should provide cathode current 1 ma to the. Figure 4. Efficient 5-V Precision Regulator 1 V 6.8 kω VCC 5 V 10 kω 10 kω 10 kω X Not Used + TL598 Feedback Figure 5. PWM Converter With Reference 16 POST OFFICE BOX 6550 DALLAS, TEXAS 7565
APPLICATION INFORMATION R (see Note A) R1A R1B R4 (see Note A) Low Limit.1 R1B RB.V ref High Limit.1 R1A RA.V ref RA RB LED on When Low Limit < < High Limit NOTE A: R and R4 are selected to provide the desired LED intensity and cathode current 1 ma to the at the available. Figure 6. Voltage Monitor 1 V 650 Ω R kω Delay R C I n. 1 V 1 V V ref. Off On C Figure 7. Delay Timer RCL IO I out V ref R CL I KA R1 R1 V I(BATT) I O h FE I KA Figure 8. Precision Current Limiter POST OFFICE BOX 6550 DALLAS, TEXAS 7565 17
APPLICATION INFORMATION IO RS I O V ref R S Figure 9. Precision Constant-Current Sink 18 POST OFFICE BOX 6550 DALLAS, TEXAS 7565
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