TL1451ACD


   
 
 
 
  SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999 CT RT ERROR 1IN+ AMPLIFIER 1 1IN– 1FEEDBACK 1DTC 1OUT GND 1 16 2 15 3 14 4 13 5 12 6 11 7 10 8 9 REF SCP 2IN+ ERROR 2IN– AMPLIFIER 2 2FEEDBACK 2DTC 2OUT VCC NC REF 3 2 1 20 19 description 1IN+ 4 18 2IN+ 1IN– 5 17 2IN– NC 6 16 NC 1FEEDBACK 7 15 2FEEDBACK IDTC 8 2OUT V CC 10 11 12 13 GND 14 2DTC 9 1OUT The TL1451A incorporates on a single monolithic chip all the functions required in the construction of two pulse-width-modulation (PWM) control circuits. Designed primarily for power-supply control, the TL1451A contains an on-chip 2.5-V regulator, two error amplifiers, an adjustable oscillator, two dead-time comparators, undervoltage lockout circuitry, and dual common-emitter output transistor circuits. SCP FK PACKAGE (TOP VIEW) CT D D, DB, N, NS, PW, OR J PACKAGE (TOP VIEW) NC D Complete PWM Power Control Circuitry Completely Synchronized Operation Internal Undervoltage Lockout Protection Wide Supply Voltage Range Internal Short-Circuit Protection Oscillator Frequency . . . 500 kHz Max Variable Dead Time Provides Control Over Total Range Internal Regulator Provides a Stable 2.5-V Reference Supply Available in Q-Temp Automotive HighRel Automotive Applications Configuration Control / Print Support Qualification to Automotive Standards RT D D D D D D D The uncommitted output transistors provide common-emitter output capability for each controller. The internal amplifiers exhibit a common-mode voltage range from 1.04 V to 1.45 V. The dead-time control (DTC) comparator has no offset unless externally altered and can provide 0% to 100% dead time. The on-chip oscillator can be operated by terminating RT and CT. During low VCC conditions, the undervoltage lockout control circuit feature locks the outputs off until the internal circuitry is operational. The TL1451AC is characterized for operation from –20°C to 85°C. The TL1451AQ is characterized for operation from –40°C to 125°C. The TL1451AM is characterized for operation from –55°C to 125°C. AVAILABLE OPTIONS PACKAGED DEVICES SMALL OUTLINE (D) SMALL OUTLINE (DB)† PLASTIC DIP (N) SMALL OUTLINE (NS) TSSOP (PW)† CHIP CARRIER (FK) CERAMIC DIP (J) –20°C to 85°C TL1451ACD TL1451ACDB TL1451ACN TL1451ACNS TL1451ACPW — — –40°C to 125°C TL1451AQD — — — — — — TA –55°C to 125°C — — — — — TL1451AMFK † The DB and PW packages are only available left-end taped and reeled (add LE suffix, i.e., TL1451ACPWLE). TL1451AMJ 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. Copyright  1999, Texas Instruments Incorporated 
 
   !"   #!$%  &"' &!    #"   #" (" " 
") !" && *+' &!  # ", &"  " "%+  %!&" ",  %% #""'  #&!  #%   - ./.0 %% #"" " ""& !%" ("*" "&'  %% (" #&! 0 #&!  # ", &"  " "%+  %!&" ",  %% #""' www.ti.com 1 
   
 
 
 
   SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999 functional block diagram 2 DTC ERROR AMPLIFIER 2 IN+ IN– 2 FEEDBACK 1 FEEDBACK SCP VCC RT 9 2 11 14 13 10 + 12 Oscillator 1/2 Vref 5 15 IN– 4 16 REF UVLO S 3 PWM COMP Reference Voltage 12 kΩ R IN+ 2 OUTPUT – 170 kΩ ERROR AMPLIFIER 1 CT 1 R + 7 – 1 OUTPUT PWM COMP 1 DTC 6 8 COMPONENT COUNT 65 Resistors Capacitors 8 Transistors 105 JFETs 2 18 www.ti.com GND 
   
 
 
 
   SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999 absolute maximum ratings over operating free-air temperature range† Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 V Amplifier input voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 V Collector output voltage, VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 V Collector output current, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 mA Continuous power total dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table Operating free-air temperature range, TA C suffix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20°C to 85°C Q suffix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40°C to 125°C M suffix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55°C to 125°C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°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. DISSIPATION RATING TABLE PACKAGE TA ≤ 25°C POWER RATING DERATING FACTOR ABOVE TA = 25°C TA = 70°C POWER RATING TA = 85°C POWER RATING TA = 125°C POWER RATING D 1088 mW 8.7 mW/°C 696 mW 566 mW 218 mW DB 775 mW 6.2 mW/°C 496 mW 403 mW — N 1000 mW 8.0 mW/°C 640 mW 520 mW — NS 500 mW 4.0 mW/°C 320 mW 260 mW — PW 838 mW 6.7 mW/°C 536 mW 436 mW 168 mW FK 1375 mW 11.0 mW/°C 880 mW 715 mW 275 mW J 1375 mW 11.0 mW/°C 880 mW 715 mW 275 mW recommended operating conditions MIN Supply voltage, VCC MAX UNIT 3.6 50 V 1.05 1.45 V Collector output voltage, VO 50 V Collector output current, IO 20 mA Current into feedback terminal 45 Amplifier input voltage, VI µA Feedback resistor, RF 100 Timing capacitor, CT 150 15000 pF Timing resistor, RT 5.1 100 kΩ kHz Oscillator frequency Operating g free-air temperature,, TA www.ti.com kΩ 1 500 C suffix –20 85 Q suffix –40 125 M suffix –55 125 °C 3 
   
 
 
 
   SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999 electrical characteristics over recommended operating free-air temperature range, VCC = 6 V, f = 200 kHz (unless otherwise noted) reference section TL1451AC PARAMETER TEST CONDITIONS Output voltage (pin 16) IO = 1 mA TA = –20°C to 25°C O tp t voltage Output oltage change with ith temperat temperature re Input voltage regulation Output voltage regulation Short-circuit output current † All typical values are at TA = 25°C. TYP† MIN 2.4 MAX UNIT 2.5 2.6 –0.1% ±1% TA = 25°C to 85°C VCC = 3.6 V to 40 V –0.2% ±1% 2 12.5 mV IO = 0.1 mA to 1 mA VO = 0 1 7.5 mV 10 30 mA 3 V undervoltage lockout section TL1451AC PARAMETER TEST CONDITIONS MIN TYP† MAX UNIT Upper threshold voltage (VCC) 2.72 V Lower threshold voltage (VCC) 2.6 V 80 120 mV 1.5 1.9 V TL1451AC MIN TYP† MAX UNIT Hysteresis (VCC) IO(ref) 0.1 1 mA mA, O( f) = 0 TA = 25°C Reset threshold voltage (VCC) † All typical values are at TA = 25°C. short-circuit protection control section PARAMETER TEST CONDITIONS Input threshold voltage (SCP) Standby voltage (SCP) TA = 25°C No pullup Latched input voltage (SCP) No pullup Input (source) current VI = 0.7 V, TA = 25°C 0.65 0.7 0.75 V 140 185 230 mV 60 120 mV –10 –15 –20 µA Comparator threshold voltage (FEEDBACK) † All typical values are at TA = 25°C. 1.18 V oscillator section PARAMETER TEST CONDITIONS TL1451C TYP† MAX Frequency CT = 330 pF, Standard deviation of frequency CT = 330 pF, Frequency change with voltage VCC = 3.6 V to 40 V TA = –20°C to 25°C –0.4% ±2% TA = 25°C to 85°C –0.2% ±2% Frequency change with temperature † All typical values are at TA = 25°C. 4 www.ti.com RT = 10 kΩ RT = 10 kΩ MIN 200 UNIT kHz 10% 1% 
   
 
 
 
   SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999 dead-time control section PARAMETER TEST CONDITIONS TL1451AC MIN TYP† MAX Input bias current (DTC) 1 Latch mode (source) current (DTC) TA = 25°C IO = 40 µA Latched input voltage (DTC) –80 Input threshold voltage at f = 10 kHz (DTC) Maximum duty cycle V 2.05 1.2 µA µA –145 2.3 Zero duty cycle UNIT 2.25 1.45 V † All typical values are at TA = 25°C. error-amplifier section PARAMETER Input offset voltage TEST CONDITIONS Input offset current VO (FEEDBACK) = 1.25 V VO (FEEDBACK) = 1.25 V Input bias current VO (FEEDBACK) = 1.25 V Common-mode input Common mode in ut voltage range VCC = 3.6 V to 40 V Open-loop voltage amplification RF = 200 kΩ MIN TL1451AC TYP† 160 MAX ±6 mV ±100 nA 500 nA 1.05 to 1.45 V 70 Unity-gain bandwidth Common-mode rejection ratio 60 Positive output voltage swing Vref–0.1 80 dB 1.5 MHz 80 dB V Negative output voltage swing 1 Output (sink) current (FEEDBACK) Output (source) current (FEEDBACK) † All typical values are at TA = 25°C. VID = –0.1 V, VID = 0.1 V, VO = 1.25 V VO = 1.25 V UNIT V 0.5 1.6 mA –45 –70 µA output section PARAMETER TEST CONDITIONS Collector off-state current Output saturation voltage Short-circuit output current † All typical values are at TA = 25°C. TL1451AC TYP† MAX MIN VO = 50 V IO = 10 mA 1.2 10 VO = 6 V 90 2 UNIT µA V mA pwm comparator section PARAMETER TEST CONDITIONS TL1451AC TYP† MAX MIN Zero duty cycle Input threshold voltage at f = 10 kHz (FEEDBACK) Maximum duty cycle 2.05 1.2 2.25 1.45 UNIT V † All typical values are at TA = 25°C. total device PARAMETER TEST CONDITIONS Standby supply current Average supply current † All typical values are at TA = 25°C. www.ti.com TL1451AC TYP† MAX MIN UNIT Off-state 1.3 1.8 mA RT = 10 kΩ 1.7 2.4 mA 5 
   
 
 
 
   SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999 electrical characteristics over recommended operating free-air temperature range, VCC = 6 V, f = 200 kHz (unless otherwise noted) reference section TL1451AQ, TL1451AM PARAMETER O tp t voltage Output oltage (pin 16) TEST CONDITIONS MIN TYP† MAX 2.40 2.50 2.60 2.35 2.46 2.65 –0.63% *±4% TA = 25°C TA = 125°C 2.0 12.5 0.7 15 TA = MIN TA = 25°C 0.3 30 1.0 7.5 TA = 125°C TA = MIN 0.3 14 0.3 20 10 30 TA = 25°C TA = MIN and 125°C IO = 1 mA Output voltage change with temperature Input In ut voltage regulation Output Out ut voltage regulation VCC = 3.6 V to 40 V IO = 0.1 mA to 1 mA Short-circuit output current VO = 0 *These parameters are not production tested. † All typical values are at TA = 25°C unless otherwise indicated. 3 UNIT V mV mV mA undervoltage lockout section TL1451AQ, TL1451AM PARAMETER TEST CONDITIONS Upper U er threshold voltage (VCC) Lower threshold voltage (VCC) Hysteresis (VCC) Reset threshold voltage g (V ( CC) † All typical values are at TA = 25°C unless otherwise indicated. 6 www.ti.com MIN TYP† TA = 25°C TA = 125°C 2.72 TA = MIN TA = 25°C 3.15 TA = 125°C TA = MIN 1.65 1.70 MAX UNIT V 2.60 V 3.09 TA = 25°C TA = 125°C 80 120 10 50 TA = MIN TA = 25°C 10 60 1.50 TA = 125°C 0.95 TA = MIN 1.50 mV V 
   
 
 
 
   SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999 short-circuit protection control section PARAMETER Input In ut threshold voltage (SCP) TEST CONDITIONS TA = 25°C TA = 125°C 650 700 750 400 478 550 TA = MIN 800 880 950 140 185 230 TA = 25°C TA = 125°C 60 120 70 120 TA = MIN 60 120 Standby voltage (SCP) Latched input in ut voltage (SCP) TL1451AQ, TL1451AM MIN TYP† MAX Equivalent timing resistance Comparator threshold voltage (FEEDBACK) † All typical values are at TA = 25°C unless otherwise indicated. UNIT mV mV mV 170 kΩ 1.18 V oscillator section PARAMETER TEST CONDITIONS CT = 330 pF, F RT = 10 kΩ Frequency TL1451AQ, TL1451AM MIN TYP† MAX TA = 25°C TA = 125°C 200 193 195 Standard deviation of frequency CT = 330 pF, TA = MIN RT = 10 kΩ VCC = 3.6 V to 40 V TA = 25°C TA = 125°C 1% Frequency change with voltage TA = MIN 3% UNIT kHz 2% 1% Frequency change with temperature 1.37% *±10% *These parameters are not production tested. † All typical values are at TA = 25°C unless otherwise indicated. dead-time control section PARAMETER TEST CONDITIONS TL1451AQ, TL1451AM MIN TYP† MAX TA = 25°C TA = MIN and 125°C Inp t bias current Input c rrent (DTC) Latch mode (source) current (DTC) 1 3 –80 input Latched in ut voltage (DTC) Input threshold voltage at f = 10 kHz (DTC) µA V 2.30 2.22 2.32 TA = MIN Zero duty cycle 2.28 2.40 2.05 *1.20 µA A –145 TA = 25°C TA = 125°C Maximum duty cycle UNIT 1.45 *2.25 V *These parameters are not production tested. † All typical values are at TA = 25°C unless otherwise indicated. www.ti.com 7 
   
 
 
 
   SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999 error-amplifier section PARAMETER Input In ut offset voltage TEST CONDITIONS VO (FEEDBACK) = 1.25 V TL1451AQ, TL1451AM MIN TYP† MAX ±6 TA = 25°C TA = 125°C ±10 VO (FEEDBACK) = 1.25 V Input In ut bias current VO (FEEDBACK) = 1.25 V Common-mode Common mode in input ut voltage range Open-loop O en loo voltage am amplification lification ±100 ±100 TA = 125°C TA = MIN 160 500 100 500 TA = MIN 142 700 1.05 to 1.45 RF = 200 kΩ 70 80 70 80 TA = MIN 64 80 Common-mode rejection ratio 60 Positive output voltage swing 2 dB 1.5 MHz 80 dB V Negative output voltage swing 1 Output ((source)) current ((FEEDBACK)) VID = –0.1 0.1 V, VO = 1.25 V VID = 0.1 V,, VO = 1.25 V TA = 25°C TA = 125°C 0.5 1.6 0.4 1.8 TA = MIN TA = 25°C 0.3 1.7 –45 –70 –25 –50 –15 –70 TA = 125°C TA = MIN nA V TA = 25°C TA = 125°C Unity-gain bandwidth Output Out ut (sink) current (FEEDBACK) nA ±200 TA = 25°C TA = 125°C VCC = 3.6 V to 40 V mV ±12 TA = MIN TA = 25°C Input In ut offset current UNIT V mA µA µ † All typical values are at TA = 25°C unless otherwise indicated. output section PARAMETER Collector off-state current TEST CONDITIONS TL1451AQ, TL1451AM MIN TYP† MAX VO = 50 V TA = 25°C 10 TA = 125°C TA = MIN Output Out ut saturation voltage Short-circuit output current † All typical values are at TA = 25°C unless otherwise indicated. VO = 6 V 1.20 2.0 1.60 2.4 1.36 2.2 90 UNIT µA V mA pwm comparator section PARAMETER TEST CONDITIONS Zero duty cycle Input threshold voltage at f = 10 kHz (FEEDBACK) Maximum duty cycle *These parameters are not production tested. † All typical values are at TA = 25°C unless otherwise indicated. 8 TL1451AQ, TL1451AM MIN TYP† MAX www.ti.com 2.05 *1.20 1.45 *2.25 UNIT V 
   
 
 
 
   SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999 total device PARAMETER TEST CONDITIONS Standby supply current Average supply current † All typical values are at TA = 25°C unless otherwise indicated. TL1451AQ, TL1451AM MIN TYP† MAX UNIT Off-state 1.3 1.8 mA RT = 10 kΩ 1.7 2.4 mA PARAMETER MEASUREMENT INFORMATION Test Input S1 VCC = 5 V RL CPE 0.47 µF 4.7 kΩ OUT1 RL 4.7 kΩ 16 15 14 13 12 11 10 OUT2 9 TL1451A 1 CT 330 pF 2 3 4 5 6 7 8 RT 10 kΩ Test Input Figure 1. Test Circuit Oscillator Triangle Waveform Error Amplifier Output Dead-Time Input Voltage Short-Circuit Protection Comparator Input Voltage PWM Comparator Output Voltage 2.0 V 1.6 V 1.4 V 1.25 V H L Dead Time 100% H Output Transistor Collector Waveform L 0.6 V Protection Enable Terminal Waveform tpe† H Short-Circuit Protection Comparator Output Power Supply Voltage 0V L 3.6 V 2.8 V TYP 0V † Protection Enable Time, tpe = (0.051 x 106 x Cpe) in seconds Figure 2. TL1451A Timing Diagram www.ti.com 9 
   
 
 
 
   SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999 TYPICAL CHARACTERISTICS TRIANGLE OSCILLATOR FREQUENCY vs TIMING RESISTANCE OSCILLATOR FREQUENCY VARIATION vs FREE-AIR TEMPERATURE 3 VCC = 5 V TA = 25°C f osc – Oscillator Frequency Variation – % ∆afosc ffosc osc – Triangle Oscillator Frequency – Hz 1M CT = 150 pF 100 k CT = 1500 pF 10 k CT = 15000 pF 1k 1k 4k 10 k 40 k 100 k 400 k VCC = 3.6 V RT = 10 kΩ CT = 330 pF fosc = 200 kHz 2 1 0 –1 –2 ÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎ –3 –25 1M RT – Timing Resistance – Ω 75 0 25 50 TA – Free-Air Temperature – °C Figure 3 Figure 4 TRIANGLE WAVEFORM PERIOD vs TIMING CAPACITANCE TRIANGLE WAVEFORM SWING VOLTAGE vs TIMING CAPACITANCE 102 VCC = 5 V RT = 5.1 kΩ TA = 25°C s Triangle Waveform Period – µ uS Triangle Waveform Swing Voltage – V 2.6 2.4 100 2.2 2 1.8 1.6 1.4 1.2 VCC = 5 V RT = 5.1 kΩ TA = 25°C 101 100 1 0.8 101 102 103 104 CT – Timing Capacitance – pF 105 Figure 5 10 10–1 101 102 103 104 CT – Timing Capacitance – pF Figure 6 www.ti.com 105 
   
 
 
 
   SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999 TYPICAL CHARACTERISTICS REFERENCE OUTPUT VOLTAGE VARIATION vs FREE-AIR TEMPERATURE 30 avref – Reference Output Voltage Variation – mV ∆VO(ref) avref – Reference Output Voltage Variation – mV ∆VO(ref) REFERENCE OUTPUT VOLTAGE VARIATION vs FREE-AIR TEMPERATURE VCC = 3.6 V II(ref) = 1 mA 20 10 0 –10 ÁÁ ÁÁ ÁÁ ÁÁ – 20 ÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎ – 30 – 25 75 0 25 50 TA – Free-Air Temperature – °C 100 30 VCC = 40 V II(ref) = 1 mA 20 ÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎ 10 0 –10 ÁÁ ÁÁ ÁÁ ÁÁ – 20 – 30 – 25 75 0 25 50 TA – Free-Air Temperature – °C Figure 7 Figure 8 DROPOUT VOLTAGE VARIATION vs FREE-TEMPERATURE REFERENCE OUTPUT VOLTAGE vs SUPPLY VOLTAGE 1.1 II(ref) = 1 mA TA = 25°C 2.5 1 Dropout Voltage Variation – V VO(ref) Vref – Reference Output Voltage – V 3 ÁÁ ÁÁ ÁÁ 100 2 1.5 1 0.9 0.8 0.7 0.6 0.5 0 0 5 10 15 20 25 30 VCC – Supply Voltage – V 35 40 Figure 9 – 25 0 25 50 75 TA – Free-Air Temperature – °C 100 Figure 10 www.ti.com 11 
   
 
 
 
   SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999 TYPICAL CHARACTERISTICS UNDERVOLTAGE LOCKOUT HYSTERESIS CHARACTERISTICS – Output Collector Voltage – V VVCE CE Undervoltage Lockout Threshold Voltage – V TA = 25°C TA = –20°C TA = 85°C ÁÁ ÁÁ ÁÁ UNDERVOLTAGE LOCKOUT CHARACTERISTIC 5 4 3 5V RL 2 7,10 I = IO 8 VDE 1 300 3.5 IO = 10 mA 3.25 Threshold Voltage –VTH (Left Scale) 3 200 Threshold Voltage –VTL (Left Scale) 2.75 150 2.5 100 Hysteresis Voltage (Right Scale) 50 2.25 0 2 0 0 1 2 4 3 5 –25 0 25 50 Figure 11 Figure 12 SHORT-CIRCUIT PROTECTION CHARACTERISTICS Comparator Threshold Voltage – V Short-Circuit Protection Latch Reset Supply Voltage (Right Scale) 2 1.20 1.15 1.10 – 25 2.5 Short-Circuit Protection Comparator Threshold Voltage (Left Scale) 50 75 0 25 TA – Free-Air Temperature – °C Figure 13 www.ti.com 1.5 1 100 RS – Latch Reset Supply Voltage – V 3 1.30 1.25 75 TA – Free-Air Temperature – °C VCC – Supply Voltage – V 12 250 100 Undervoltage Lockout Hystersis Voltage – mV 6 
   
 
 
 
   SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999 TYPICAL CHARACTERISTICS PROTECTION ENABLE TIME vs PROTECTION ENABLE CAPACITANCE 18 tpe t pe – Protection Enable Time – s 15 12 9 6 3 0 0 200 50 100 150 CPE – Protection Enable Capacitance – µF SCP 15 Vref 16 170 kΩ Short-circuit Protection Comparator 12 kΩ CPE ERROR AMP 1 ERROR AMP 2 250 Vref S R Protection Latch Vref U.V.L.O. + 1.25 V – Figure 14 www.ti.com 13 
   
 
 
 
   SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999 TYPICAL CHARACTERISTICS OPEN-LOOP VOLTAGE AMPLIFICATION vs FREQUENCY ERROR AMP MAXIMUM OUTPUT VOLTAGE SWING vs FREQUENCY 2 90 VCC = 5 V TA = 25°C Open-Loop Voltage Amplification – dB Error Amp Maximum Output Voltage Swing – V 2.25 1.75 1.5 1.25 1 0.75 0.5 0.25 0 1k 10 k 100 k 1M f – Frequency – Hz VCC = 5 V TA = 25°C 80 70 60 50 40 30 20 10 0 100 10 M 1k Figure 15 Figure 16 GAIN (AMPLIFIER IN UNITY-GAIN CONFIGURATION) vs FREQUENCY 10 VCC = 5 V TA = 25°C 5 G – Gain – dB 0 –5 –10 –15 –20 1k 10 k 100 k f – Frequency – Hz Figure 17 14 10 k 100 k f – Frequency – Hz www.ti.com 1M 10 M 1M 2M 
   
 
 
 
   SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999 TYPICAL CHARACTERISTICS CLOSED-LOOP GAIN AND PHASE SHIFT vs FREQUENCY 70 Phase Shift (Right Scale) 50 40 47 pF 470 pF 4700 pF 0° Closed-Loop Gain (Left Scale) –10° –20° 30 –30° Phase Shift Closed-Loop Gain – dB 60 CX: VCC = 5 V Rref = 150 Ω Cref = 470 pF TA = 25°C –40° 20 –50° –60° –70° 10 –80° 0 100 1k 10 k 100 k –90° 1M f – Frequency – Hz Vref + – 39 kΩ Cx Rref Cref 39 kΩ Test Circuit Figure 18 www.ti.com 15 
   
 
 
 
   SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999 TYPICAL CHARACTERISTICS CLOSED-LOOP GAIN AND PHASE SHIFT vs FREQUENCY 70 CX: Phase Shift (Right Scale) 50 Closed-Loop Gain (Left Scale) 40 47 pF 470 pF 4700 pF 0° –10° –20° 30 –30° –40° 20 –50° –60° –70° 10 –80° 0 100 1k 10 k 100 k f – Frequency – Hz Vref + – 39 kΩ Cx Rref Cref 39 kΩ Test Circuit Figure 19 16 www.ti.com –90° 1M Phase Shift Closed-Loop Gain – dB 60 VCC = 5 V Rref = 15 Ω Cref = 470 pF TA = 25°C 
   
 
 
 
   SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999 TYPICAL CHARACTERISTICS CLOSED-LOOP GAIN AND PHASE SHIFT vs FREQUENCY 70 CX: 50 40 Phase Shift (Right Scale) Closed-Loop Gain (Left Scale) 47 pF 470 pF 4700 pF 0° –10° –20° 30 –30° Phase Shift Closed-Loop Gain – dB 60 VCC = 5 V Rref = 15 Ω Cref = 470 pF TA = 25°C –40° 20 –50° –60° –70° 10 –80° 0 100 1k 10 k 100 k –90° 1M f – Frequency – Hz Vref + – 39 kΩ Cx Rref Cref 39 kΩ Test Circuit Figure 20 www.ti.com 17 
   
 
 
 
   SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999 TYPICAL CHARACTERISTICS CLOSED-LOOP GAIN AND PHASE SHIFT vs FREQUENCY 70 50 0° 40 Closed-Loop Gain (Left Scale) Phase Shift (Right Scale) 30 –10° –20° –30° –40° 20 –50° –60° –70° 10 –80° 0 100 1k 10 k 100 k f – Frequency – Hz Vref + – 39 kΩ Cref 39 kΩ Test Circuit Figure 21 18 www.ti.com –90° 1M Phase Shift Closed-Loop Gain – dB 60 VCC = 5 V Cref = 470 pF TA = 25°C 
   
 
 
 
   SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999 TYPICAL CHARACTERISTICS OUTPUT SINK CURRENT vs COLLECTOR OUTPUT SATURATION VOLTAGE 120 TA = –20°C 110 TA = 25°C Output Sink Current – mA 100 90 TA = 85°C 80 70 60 50 40 30 20 VCC = 3.6 V 10 0 0 15 5 10 Collector Output Saturation Voltage – V 20 Figure 22 VO(ref) –0.01 1 VO(ref) –0.02 0.9 Maximum Output Voltage Swing (Right Scale) VO(ref) –0.03 0.8 VO(ref) –0.04 0.7 Maximum Output Voltage Swing (Right Scale) VO(ref) –0.05 0.6 VO(ref) –0.06 0.5 Vref VOM – Maximum Output Voltage Swing – V VOM – Maximum Output Voltage Swing – V MAXIMUM OUTPUT VOLTAGE SWING vs FREE-AIR TEMPERATURE 33 kΩ + 33 kΩ – RL 100 kΩ Vvom – 1 VCC = 3.6 V RL = 100 kΩ VOM+1 = 1.25 V VOM –1 = 1.15 V (Right Scale) VOM –1 = 1.35 V (Left Scale) TEST CIRCUIT VO(ref) –0.07 –25 0 25 50 75 TA – Free-Air Temperature – °C 100 Figure 23 www.ti.com 19 
   
 
 
 
   SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999 TYPICAL CHARACTERISTICS OUTPUT TRANSISTOR ON DUTY CYCLE vs DEAD-TIME INPUT VOLTAGE STANDBY CURRENT vs SUPPLY VOLTAGE VCC = 3.6 V RT = 10kΩ CT = 330 pF 10 20 IICC CC (Standby) – Standby Current – mA Output Transistor “On” Duty Cycle – % 0 30 40 50 60 70 ÁÁ ÁÁ 80 90 100 0 0.5 1 1.5 2 2.5 3 3.5 TA = 25°C 2 1.75 1.5 1.25 1 0.75 0.5 0.25 0 4 0 10 20 30 VCC – Supply Voltage – V Dead-Time Input Voltage – V Figure 24 40 Figure 25 MAXIMUM CONTINUOUS POWER DISSIPATION vs FREE-AIR TEMPERATURE STANDBY CURRENT vs FREE-AIR TEMPERATURE I CC – Supply Current – mA ICC 2 ÁÁ ÁÁ 1.75 1.5 Maximum Continuous Power Dissipation – mW 1200 Average Supply Current VCC = 6 V, RT = 10 kΩ, CT = 330 pF Stand-By Current, VCC = 40 V, No Load 1.25 1 Stand-By Current, VCC = 3.6 V, No Load 0.75 0.5 0.25 0 –25 0 25 50 75 TA – Free-Air Temperature – °C 100 Figure 26 20 1100 16-Pin N Plastic Dip 1000 Thermal Resistance 125°C/W 900 800 700 600 16-Pin NS Plastic SO 500 400 Thermal Resistance 250°C/W 300 200 100 0 –25 0 75 25 50 TA – Free-Air Temperature Figure 27 www.ti.com 100 
   
 
 
 
   SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999 APPLICATION INFORMATION VCC 220 kΩ 0.47 µF 150 Ω 470 Ω 50 kΩ 33 kΩ L1 330 pF R1 R2 33 kΩ R3 33 kΩ 33 kΩ Step-Up C2 Output R4 C1 500 pF Vref 16 15 14 13 12 11 10 9 TL1451A 1 2 3 4 5 6 7 8 470 Ω 470 Ω R5 C5 220 Ω 500 pF 1 µF L2 R6 470 Ω 33 kΩ Step-Down C4 Output R7 33 kΩ NOTE A: Values for R1 through R7, C1 through C4, and L1 and L2 depend upon individual application. Figure 28. High-Speed Dual Switching Regulator www.ti.com 21 PACKAGE OPTION ADDENDUM www.ti.com 14-Oct-2022 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan (2) Lead finish/ Ball material MSL Peak Temp Op Temp (°C) Device Marking (3) Samples (4/5) (6) TL1451ACD ACTIVE SOIC D 16 40 RoHS & Green NIPDAU Level-1-260C-UNLIM -20 to 85 TL1451AC Samples TL1451ACDBR ACTIVE SSOP DB 16 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM -20 to 85 T1451A Samples TL1451ACDR ACTIVE SOIC D 16 2500 RoHS & Green NIPDAU Level-1-260C-UNLIM -20 to 85 TL1451AC Samples TL1451ACN ACTIVE PDIP N 16 25 RoHS & Green NIPDAU N / A for Pkg Type -20 to 85 TL1451ACN Samples TL1451ACNS ACTIVE SO NS 16 50 RoHS & Green NIPDAU Level-1-260C-UNLIM 0 to 0 TL1451A Samples TL1451ACNSR ACTIVE SO NS 16 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM -20 to 85 TL1451A Samples TL1451ACPW ACTIVE TSSOP PW 16 90 RoHS & Green NIPDAU Level-1-260C-UNLIM -20 to 85 T1451A Samples TL1451ACPWR ACTIVE TSSOP PW 16 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM -20 to 85 T1451A Samples TL1451ACPWRG4 ACTIVE TSSOP PW 16 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM -20 to 85 T1451A Samples TL1451AQD ACTIVE SOIC D 16 40 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 125 TL1451AQ Samples TL1451AQDR ACTIVE SOIC D 16 2500 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 125 TL1451AQ Samples TL1451CN ACTIVE PDIP N 16 25 RoHS & Green NIPDAU N / A for Pkg Type -20 to 85 TL1451CN Samples TL1451CNS ACTIVE SO NS 16 50 RoHS & Green NIPDAU Level-1-260C-UNLIM -20 to 85 TL1451 Samples TL1451CNSR ACTIVE SO NS 16 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM -20 to 85 TL1451 Samples TL1451INSR ACTIVE SO NS 16 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM -20 to 85 TL1451I Samples (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. Addendum-Page 1 PACKAGE OPTION ADDENDUM www.ti.com 14-Oct-2022 (2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of