PROGRAMMABLE PRECISION SHUNT REGULATOR TL431/A /C

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1 PROGRAMMABLE PRECISION SHUNT REGULATOR TL43/A /C TO92 PKG (TOP VIEW PROGRAMMABLE PRECISION REFERENCES The TL43 is threeterminal adjustable shunt regulator with specified termal stability. The output voltage may be set to any value between (Approx. 2.5V and 36V with two external resistors. This device has a typical output inpedance of 0.2. Active output circuitry provides a very sharp turnon characteristic, making this device excellent replacement for zener diodes in many application. FEATURES 3. CATHODE 2. ANODE. REF SOT89 (FRONT VIEW 2 3. REF REF 2. ANODE ANODE CATHODE 3. CATHODE SOT23 PKG (FRONT VIEW Equivalent Full Range Temperature Coefficient 50PPM/ Temperature Compensated For Operation Over Full Rate Operating Temperature Range. REF 2. ANODE Adjustable Output Voltage 3. 3 Fast Turnon Response CATHODE Sink Current Capability to 00 Low (0.2 Typ. Dynamic Output Impedance ORDERING INFORMATION Low Output Noise FUNCTION BLOCK DIAGRAM BLOCK DIAGRAM Device TL43 TL43A TL43C TL43F TL43AF TL43CF TL43SF TL43ASF TL43CSF 2 Marking TL43 TL43A TL43C A 43C Package TO92 SOT89 SOT23 CATHODE(K REFERENCE CATHODE 2.5 REFERENCE(R ANODE(A ANODE

2 PROGRAMMABLE PRECISION SHUNT REGULATOR TL43/A /C EQUIVALENT SCHEMATIC CATHODE REF ANODE 800 All component values are nominal RECOMMENDED OPERATING CONDITIONS CHARACTERISTIC Cathode Voltage Cathode Current SYMBOL V KA I K MIN. MAX UNIT V DISSIPATION RATING TABLEFREEAIR TEMPERATURE Package T A =25 Derating Factor T A =70 T A =85 T A =25 Power Rating Above T A =25 Power Rating Power Rating Power Rating TO92 SOT / / SOT / 264 2

3 PROGRAMMABLE PRECISION SHUNT REGULATOR TL43/A /C ABSOLUTE MAXIMUM RATINGS (Full Operating Ambient Temperature Range Applies Unless Otherwise Noted CHARACTERISTIC Cathode Voltage Continuous Cathode Current Range Reference Input Current Range Junction Temperature Operating Temperature Storage Temperature Total Power Dissipation SYMBOL V KA I KA I REF T OPR T STG 65~50 P D RATING 37 00~ ~0 T J 50 0~ UNIT V TL43 ELECTRICAL CHARACTERISTICS (T A =25, unless otherwise specified CHARACTERISTIC SYMBOL CIRCUIT TEST CONDITION Reference Input Voltage V KA =, I K =0 Deviation of Reference V KA =, I K =0 Input Voltage Over / T T A =Full Range Full Temperature Range Ratio of Change in Reference Input Voltage / to the Change in Cathod Voltage V KA V KA =0V 2 I K =0 V KA =36V0V Reference Input Current I REF 2 I KA =0, R=0, = Deviation of Reference I K =0, R=0, = Input Current Over Full I REF / T 2 T A =Full Range Temperature Range Minimum Cathode I KA MIN V KA = Current for Regulation OffState Cathode I KA OFF 3 V KA =36V, =0 Current Dynamic Impedance Z KA V KA =, I K = ~00, f MIN TYP. MAX. UNIT V /V

4 PROGRAMMABLE PRECISION SHUNT REGULATOR TL43/A /C TL43A ELECTRICAL CHARACTERISTICS (T A =25, unless otherwise specified CHARACTERISTIC SYMBOL CIRCUIT TEST CONDITION MIN. TYP. MAX. UNIT Reference Input Voltage V KA =, I K = V Deviation of Reference V KA =, I K =0 Input Voltage Over / T T A =Full Range 4 7 Full Temperature Range Ratio of Change in V KA =0V Reference Input Voltage / V KA 2 I K =0 to the Change in Cathod V KA =36V0V 2 Voltage /V Reference Input Current I REF 2 I KA =0, R=0, = 2 4 Deviation of Reference I K =0, R=0, = Input Current Over Full I REF / T 2 T A =Full Range Temperature Range Minimum Cathode V KA =V I REF KA MIN Current for Regulation OffState Cathode V KA =36V, =0 I KA OFF 3 Current Dynamic Impedance V KA =, I K = ~00, Z KA f TL43C ELECTRICAL CHARACTERISTICS (T A =25, unless otherwise specified CHARACTERISTIC SYMBOL CIRCUIT TEST CONDITION MIN. TYP. MAX. UNIT Reference Input Voltage V KA =, I K = V Deviation of Reference V KA =, I K =0 Input Voltage Over / T T A =Full Range 4 7 Full Temperature Range Ratio of Change in V KA =0V Reference Input Voltage / V KA 2 I K =0 to the Change in Cathod V KA =36V0V 2 Voltage /V Reference Input Current I REF 2 I KA =0, R=0, = 2 4 Deviation of Reference I K =0, R=0, = Input Current Over Full I REF / T 2 T A =Full Range Temperature Range Minimum Cathode V KA = I KA MIN Current for Regulation OffState Cathode V KA =36V, =0 I KA OFF 3 Current Dynamic Impedance V KA =, I K = ~00, Z KA f

5 PROGRAMMABLE PRECISION SHUNT REGULATOR TL43/A /C Fig. Test Circuit for V KA = Fig. 2 Test Circuit for V KA INPUT I KA V KA INPUT I KA V KA DUT R REF DUT V KA = (R/I REF R Fig. Test Circuit for I KA off INPUT I KA V KA DUT 5

6 PROGRAMMABLE PRECISION SHUNT REGULATOR TL43/A /C The deviation parameters (DEV and I REF(DEF are defined as the differences between the maximum and minimum values obtained over the recommended temperature range. The average fullrange temperature coefficient of the reference voltage,, is defined as : Maximum ppm = V I(dev at 25 x0 6 Minimum V I(dev T A T A Where : T A is the recommended operating freeair temperature range of the device. can be positive or negative, depending on whether minimum or maximum, respectively, occurs at the lower temperature. Example : Maximum =2496 at 30, maximum =2492 at 0, =2495 at 25, T A =70 for TL43C x0 6 ~ 23PPM/ Because minimum 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 3, the total dynamic impedance of the circuit is given by : = Z' V ~ Z KA R Figure. Calculating deviation parameters and dynamic impedance 6

7 PROGRAMMABLE PRECISION SHUNT REGULATOR TL43/A /C TYPICAL PERFORMANCE CHARACTERISTICS REFERENCE VOLTAGE vs FREEAIR TEMPERATURE REFERENCE CURRENT vs FREEAIR TEMPERATURE = R=0 = I KA = REFERENCE VOLTAGE =2495 =2440 REFERENCE VOLTAGE T A FREEAIR TEMPERATURE T A FREEAIR TEMPERATURE Data is applicable only within the recommended operating freeair Data is applicable only within the recommended operating freeair temperature ranges of the various devices. temperature ranges of the various devices. Data is for devices having the indicated value of at I KA =0, T A =25 Figure 4. Figure 5. CATHODE CURRENT vs CATHODE VOLTAGE CATHODE CURRENT vs CATHODE VOLTAGE V KA =V RE F T = V KA =V ERF T A =25 I KA CATHODE CURRENT I KA CATHODE CURRENT I MIN V KA CATHODE VOLTAGEV V KA CATHODE VOLTAGEV Figure 6. Figure 7. 7

8 PROGRAMMABLE PRECISION SHUNT REGULATOR TL43/A /C TYPICAL PERFORMANCE CHARACTERISTICS 2.5 V KA =3 6V OFFSTATE CATHODE CURRENT vs FREEAIR TEMPERATURE 0.85 V KA =3V TO 36V RATIO DELTA REFERENCE VOLTAGE TO DELTA CATHODE VOLTAGE vs FREEAIR TEMPERATURE I OFF OFFSTATE CATHODE CURRENT / V KA /V T A FREEAIR TEMPERATURE Data is applicable only within the recommended operating freeair Data is applicable only within the recommended operating freeair temperature ranges of the various devices. temperature ranges of the various devices. Figure 8. Figure 9. EQUIVALENT INPUT NOISE VOLTAGE VS FREQUENCY I O =0 T =25 V IN EQUIVALENT NOISE VOLTAGE / K 0K 00K T A FREEAIR TEMPERATURE ffrequency Figure 0. 8

9 PROGRAMMABLE PRECISION SHUNT REGULATOR TL43/A /C TYPICAL PERFORMANCE CHARACTERISTICS 9.V TL43 (DUT V CC V EE TL2027 A V =0V/ V CC TL A V =2V/V V EE TO OSCILLOSCOPE Figure. Test Circuit for Equivalent Input Noise Voltage SMALLSIGNAL VOLTAGE AMPLIFICATION VS FREQUENCY 60 A V SMALLSIGNAL VOLTAGE AMPLIFICATION I KA =0 T A =25 ~ I KA OUTPUT 232 GND Test Circuit for Voltage Amplification 0 K 0K 00K M 0M ffrequency Figure 2. 9

10 PROGRAMMABLE PRECISION SHUNT REGULATOR TL43/A /C TYPICAL PERFORMANCE CHARACTERISTICS REFERENCE IMPEDANCE VS FREQUENCY 00 I KA =0 T A =25 OUTPUT Z KA REFERENCE IMPEDANCE 0 ~ 50 I KA GND Test Circuit for Reference Impedance 0. K 0K 00K M 0M ffrequency Figure 3. REFERENCE IMPEDANCE VS FREQUENCY 6 5 T A =25 INPUT 220 OUTPUT Z KA REFERENCE IMPEDANCE OUTPUT PULSE GENERATOR f=00 50 GND Test Circuit for Pulse Response ttime Figure 4. 0

PROGRAMMABLE PRECISION SHUNT REGULATOR TL43/A /C APPLICATION INFORMATION R (SEE NOTE A R 0.% 0.% TL43 = R RETURN NOTE A : R Should provide cathode current to the TL43 at minimum Figure 5.

11 PROGRAMMABLE PRECISION SHUNT REGULATOR TL43/A /C APPLICATION INFORMATION R (SEE NOTE A R 0.% 0.% TL43 = R RETURN NOTE A : R Should provide cathode current to the TL43 at minimum Figure 5. Shunt Regulator TL43 INPUT V IT ~2.5V N ~ 2.5V FF ~ GND Figure 6. SingleSupply Comparator With TemperatureCompensated Threshold R (SEE NOTE 2N N222 = R TL43 0.% R 0.% NOTE A : R Should provide cathode current to the TL43 at minimum Figure 7. Precision HighCurrent Series Regulator

12 PROGRAMMABLE PRECISION SHUNT REGULATOR TL43/A /C APPLICATION INFORMATION IN LM7805 OUT COMMON TL43 R R = MINIMUM = 5V Figure 8. Output Control of a 3Terminal Fixed Regulator R RETURN TL43 = R Figure 9. HighCurrent Shunt Regulator R TL43 C (SEE NOTE A NOTE A : Refer to the stability boundary conditions in Figure 6 to determine allowable values for C. Figure 20. Crowbar Circuit 2

13 PROGRAMMABLE PRECISION SHUNT REGULATOR TL43/A /C APPLICATION INFORMATION IN 8.2 LM37 Adjust OUT 243 ~ 5V, TL Figure 2. Precision 5V.5A Regulator R B (SEE NOTE 27.4 ~ 5V TL43 0.% % NOTE A : R B Should provide cathode current to the TL43. Figure 22. Efficient 5V Precision Regulator 2V 6.8 5V 0 TL % 0 0.% X NOT USED TL598 FEED BACK Figure 23. PWM Converter With Reference 3

14 PROGRAMMABLE PRECISION SHUNT REGULATOR TL43/A /C APPLICATION INFORMATION RA R3 (SEE NOTE A TL43 RB OUT R4 (SEE NOTE A LOW LIMIT= RB B A B HIGH LIMIT= RA A LED ON WHEN LOW LIMIT <V I(BATT HIGH NOTE A : R3 and R4 are selected to provide the desired LED intensity and cathode current to the TL43 at the available V I(BATT. Figure 24. Voltage Monitor 2V R OFF ON TL43 C DELAY=RxCxI N 2V ( 2V Figure 25. Delay Timer I O R CL 0.% I OUT = R I KA CL R TL43 R = V I(BATT I O I KA H FE Figure 26. Precision Current Limiter 4

15 PROGRAMMABLE PRECISION SHUNT REGULATOR TL43/A /C APPLICATION INFORMATION I O I O = R S TL43 R S 0.% Figure 27. Precision ConstantCurrent Sink 5

Shenzhen Tuofeng Semiconductor Technology Co., Ltd

Shenzhen Tuofeng Semiconductor Technology Co., Ltd TF PROGRAMMABLE PRECISION REFERENCES The is three-terminal adjustable shunt regulator with specified termal stability. The output voltage may be set to any value between (Approx. 2.5V) and 36V with two