LM7918CT

www.fairchildsemi.com LM79XX 3-Terminal 1A Negative Voltage Regulator Features • Output Current in Excess of 1A • Output Voltages of -5, -6, -8 , -9, -10, -12, -15, -18 and 24V • Internal Thermal Overload Protection • Short Circuit Protection • Output Transistor Safe Operating Area Compensation Description The LM79XX series of three terminal negative regulators are available in TO-220 package and with several fixed output voltages, making them useful in a wide range of applications. Each type employs internal current limiting, thermal shut down and safe operating area protection, making it essentially indestructible. TO-220 Vin 1 1. GND 2. Input 3. Output Internal Block Digram GND R1 VOLTAGE REFERENCE R2 Output Out + Q1 Q2 PROTECTION CIRCUITRY Rsc I1 I2 Input In Rev. 1.0.2 ©2009 Fairchild Semiconductor Corporation LM79XX Absolute Maximum Ratings Parameter Input Voltage Thermal Resistance Junction-Case (Note1) Thermal Resistance Junction-Air (Note1, 2) Operating Temperature Range Storage Temperature Range Note: 1. Thermal resistance test board Size: 76.2mm * 114.3mm * 1.6mm(1S0P) JEDEC standard: JESD51-3, JESD51-7 2. Assume no ambient airflow Symbol VI RθJC RθJA TOPR TSTG Value -35 5 65 0 ~ +125 -65 ~ +150 Unit V °C/W °C °C Electrical Characteristics (LM7905) (VI = -10V, IO = 500mA, 0°C ≤TJ ≤ +125°C, CI =2.2μF, CO =1μF, unless otherwise specified.) Parameter Output Voltage Symbol TJ = +25°C VO IO = 5mA to 1A, PO ≤ 15W VI = -7V to -20V TJ = +25°C TJ = +25°C IO = 5mA to 1.5A TJ =+25°C IO = 250mA to 750mA TJ =+25°C IO = 5mA to 1A VI = -8V to -25V IO = 5mA f = 10Hz to 100kHz TA =+25°C f = 120Hz ΔVI = 10V TJ = +25°C I O = 1A TJ =+25°C, VI = -35V TJ =+25°C VI = -7V to -25V VI = -8V to -12V Conditions Min. -4.8 -4.75 54 Typ. -5.0 -5.0 35 8 10 3 3 0.05 0.1 - 0.4 40 60 2 300 2.2 Max. -5.2 -5.25 100 50 100 mV 50 6 0.5 0.8 mA mA mV/°C μV dB V mA A V Unit Line Regulation (Note3) Δ VO mV Load Regulation (Note3) Δ VO Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current IQ ΔIQ ΔVo/ΔT VN RR VD ISC IPK Note 3. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used. 2 LM79XX Electrical Characteristics (LM7906) (Continued) (VI = -11V, IO = 500mA, 0°C ≤TJ ≤ +125°C, CI =2.2μF, CO =1μF, unless otherwise specified.) Parameter Output Voltage Symbol TJ = +25°C VO IO = 5mA to 1A, PO ≤ 15W VI = -9V to -21V TJ = +25°C TJ = +25°C IO = 5mA to 1.5A TJ =+25°C IO = 250mA to 750mA TJ =+25°C IO = 5mA to 1A VI = -8V to -25V IO = 5mA f = 10Hz to 100kHz TA =+25°C f = 120Hz ΔVI = 10V TJ = +25°C I O = 1A TJ = +25°C, VI = -35V TJ = +25°C VI = -8V to -25V VI = -9V to -13V Conditions Min. -5.75 -5.7 54 Typ. -6 -6 10 5 10 3 3 0.05 0.1 -0.5 130 60 2 300 2.2 Max. -6.25 -6.3 120 60 120 mV 60 6 0.5 1.3 mA mA mV/°C μV dB V mA A V Unit Line Regulation (Note1) Δ VO mV Load Regulation (Note1) Δ VO Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current IQ ΔIQ ΔVo/ΔT VN RR VD ISC IPK Note 1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used. 3 LM79XX Electrical Characteristics (LM7908) (Continued) (VI = -14V, IO = 500mA, 0°C ≤TJ ≤ +125°C, CI =2.2μF, CO =1μF, unless otherwise specified.) Parameter Output Voltage Symbol VO Conditions TJ = +25°C IO = 5mA to 1A, PO ≤ 15W VI = -10V to -23V TJ = +25°C VI = -10.5V to -25V VI = -11V to -17V Min. -7.7 -7.6 54 Typ. -8 -8 10 5 12 4 3 0.05 0.1 -0.6 175 60 2 300 2.2 Max. -8.3 -8.4 160 80 160 mV 80 6 0.5 1 mA mA mV/°C μV dB V mA A V Unit Line Regulation (Note1) Δ VO mV Load Regulation (Note1) Δ VO TJ = +25°C IO = 5mA to 1.5A TJ =+25°C IO = 250mA to 750mA TJ =+25°C IO = 5mA to 1A VI = -10.5V to -25V IO = 5mA f = 10Hz to 100kHz TA =+25°C f = 120Hz ΔVI = 10V TJ = +25°C IO = 1A TJ = +25°C, VI = -35V TJ = +25°C Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current IQ ΔI Q ΔVo/ΔT VN RR VD ISC IPK Note 1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used. 4 LM79XX Electrical Characteristics (LM7909) (Continued) (VI = -15V, IO = 500mA, 0°C ≤TJ ≤ +125°C, CI =2.2μF, CO =1μF, unless otherwise specified.) Parameter Output Voltage Symbol TJ = +25°C VO IO = 5mA to 1A, PO ≤ 15W VI = -1.5V to -23V TJ = +25°C TJ = +25°C IO = 5mA to 1.5A TJ = +25°C IO = 250mA to 750mA TJ = +25°C IO = 5mA to 1A VI = -11.5V to -26V IO = 5mA f = 10Hz to 100kHz TA = +25°C f = 120Hz ΔVI = 10V TJ = +25°C I O = 1A TJ = +25°C, VI = -35V TJ = +25°C VI = -11.5V to -26V VI = -12V to -18V Conditions Min. -8.7 -8.6 54 Typ. -9.0 -9.0 10 5 12 4 3 0.05 0.1 -0.6 175 60 2 300 2.2 Max. -9.3 -9.4 180 90 180 mV 90 6 0.5 1 mA mA mV/°C μV dB V mA A V Unit Line Regulation (Note1) Δ VO mV Load Regulation (Note1) Δ VO Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current IQ ΔIQ ΔVo/ΔT VN RR VD ISC IPK Note: 1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used. 5 LM79XX Electrical Characteristics (LM7910) (Continued) (VI = -17V, IO = 500mA, 0°C ≤TJ ≤ +125°C, CI =2.2μF, CO =1μF, unless otherwise specified.) Parameter Output Voltage Symbol TJ = +25°C VO IO = 5mA to 1A, Pd ≤ 15W VI = -12V to -28 TJ = +25°C TJ = +25°C IO = 5mA to 1.5A TJ = +25°C IO = 250mA to 750mA TJ = +25°C IO = 5mA to 1A VI = -12.5V to -28V IO = 5mA 10Hz ≤ f ≤ 100kHz TA =+25°C f = 120Hz ΔVI = 10V TJ = +25°C IO = 1A TJ = +25°C, VI = -35V TJ = +25°C VI = -12.5V to -28V VI = -14V to -20V Conditions Min. -9.6 -9.5 54 Typ. -10 -10 12 6 12 4 3 0.05 0.1 -1 280 60 2 300 2.2 Max. -10.4 -10.5 200 100 200 mV 100 6 0.5 1 mA mA mV/°C μV dB V mA A V Unit Line Regulation (Note1) Δ VO mV Load Regulation (Note1) Δ VO Quiescent Current Quiescent Current Change Temperature Coefficient of VO Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current IQ ΔI Q ΔVo/ΔT VN RR VD ISC IPK Note: 1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used. 6 LM79XX Electrical Characteristics (LM7912) (Continued) (VI = -19V, IO = 500mA, 0°C ≤TJ ≤ +125°C, CI =2.2μF, CO =1μF, unless otherwise specified.) Parameter Output Voltage Symbol TJ = +25°C VO IO = 5mA to 1A, PO ≤ 15W VI = -15.5V to -27V TJ = +25°C TJ = +25°C IO = 5mA to 1.5A TJ = +25°C IO = 250mA to 750mA TJ = +25°C IO = 5mA to 1A VI = -14.5V to -30V IO = 5mA f = 10Hz to 100kHz TA = +25°C f = 120Hz ΔVI = 10V TJ = +25°C I O = 1A TJ = +25°C, VI = -35V TJ = +25°C VI = -14.5V to -30V VI = -16V to -22V Conditions Min. -11.5 -11.4 54 Typ. -12 -12 12 6 12 4 3 0.05 0.1 -0.8 200 60 2 300 2.2 Max. -12.5 -12.6 240 120 240 mV 120 6 0.5 1 mA mA mV/°C μV dB V mA A V Unit Line Regulation (Note1) Δ VO mV Load Regulation (Note1) Δ VO Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current IQ ΔIQ ΔVo/ΔT VN RR VD ISC IPK Note: 1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used. 7 LM79XX Electrical Characteristics (LM7915) (Continued) (VI = -23V, IO = 500mA, 0°C ≤TJ ≤ +125°C, CI =2.2μF, CO =1μF, unless otherwise specified.) Parameter Output Voltage Symbol TJ = +25°C VO IO = 5mA to 1A, PO ≤ 15W VI = -18V to -30V TJ = +25°C TJ = +25°C IO = 5mA to 1.5A TJ = +25°C IO = 250mA to 750mA TJ = +25°C IO = 5mA to 1A VI = -17.5V to -30V IO = 5mA f = 10Hz to 100kHz TA =+25°C f = 120Hz ΔVI = 10V TJ = +25°C IO = 1A TJ = +25°C, VI = -35V TJ = +25°C VI = -17.5V to -30V VI = -20V to -26V Conditions Min. -14.4 -14.25 54 Typ. -15 -15 12 6 12 4 3 0.05 0.1 -0.9 250 60 2 300 2.2 Max. -15.6 -15.75 300 150 300 mV 150 6 0.5 1 mA mA mV/°C μV dB V mA A V Unit Line Regulation (Note1) ΔV O mV Load Regulation (Note1) ΔV O Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current IQ ΔIQ ΔVo/ΔT VN RR VD ISC IPK Note: 1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used. 8 LM79XX Electrical Characteristics (LM7918) (Continued) (VI = -27V, IO = 500mA, 0°C ≤TJ ≤ +125°C, CI =2.2μF, CO =1μF, unless otherwise specified.) Parameter Output Voltage Symbol TJ = +25°C VO IO = 5mA to 1A, PO ≤ 15W VI = -22.5V to -33V TJ = +25°C TJ = +25°C IO = 5mA to 1.5A TJ = +25°C IO = 250mA to 750mA TJ = +25°C IO = 5mA to 1A VI = -21V to -33V IO = 5mA f = 10Hz to 100kHz TA = +25°C f = 120Hz ΔVI = 10V TJ = +25°C IO = 1A TJ = +25°C, VI = -35V TJ = +25°C VI = -21V to -33V VI = -24V to -30V Conditions Min. -17.3 -17.1 54 Typ. Max. -18 -18 15 8 15 5 3 0.05 0.1 -1 300 60 2 300 2.2 -18.7 -18.9 360 180 360 mV 180 6 0.5 1 mA mA mV/°C μV dB V mA A V Unit Line Regulation (Note1) Δ VO mV Load Regulation (Note1) Δ VO Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current IQ ΔIQ ΔVo/ΔT VN RR VD ISC IPK Note: 1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used. 9 LM79XX Electrical Characteristics (LM7924) (Continued) (VI = -33V, IO = 500mA, 0°C ≤TJ ≤ +125°C, CI =2.2μF, CO =1μF, unless otherwise specified.) Parameter Output Voltage Symbol TJ = +25°C VO IO = 5mA to 1A, PO ≤ 15W VI = -27V to -38V TJ = +25°C TJ = +25°C IO = 5mA to 1.5A TJ = +25°C IO = 250mA to 750mA TJ = +25°C IO = 5mA to 1A VI = -27V to -38V IO = 5mA f = 10Hz to 100kHz TA = +25°C f = 120Hz ΔVI = 10V TJ = +25°C I O = 1A TJ = +25°C, VI = -35V TJ = +25°C VI = -27V to -38V VI = -30V to -36V Conditions Min. -23 -22.8 54 Typ. -24 -24 15 8 15 5 3 0.05 0.1 -1 400 60 2 300 2.2 Max. -25 -25.2 480 180 480 mV 240 6 0.5 1 mA mA mV/°C μV dB V mA A V Unit Line Regulation (Note1) Δ VO mV Load Regulation (Note1) Δ VO Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current IQ ΔIQ ΔVo/ΔT VN RR VD ISC IPK Note: 1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used. 10 LM79XX Typical Performance Characteristics 5.1 15 Load Regulation[mV] Ou 5.05 tp 5 ut Vo lta 4.95 ge [- 4.9 V] 4.85 4.8 -40 -25 0 25 50 Output Voltage[-V] Vin=10V Io=40mA Vin=25V Io=100mA Lo 13 ad 11 Re 9 gul 7 ati 5 on 3 [m 1 V] -1 -3 -5 -40 -25 Io=1.5A Io=0.75A 75 100 125 0 25 50 75 100 125 TA, Ambient Temperature [ oC] TA, Ambient Temperature [ oC] Figure 1. Output Voltage Figure 2. Load Regulation 5 4.5 4 3.5 3 2.5 2 1.5 1 0.5 0 -40 -25 0 25 50 75 100 TA, Ambient Temperature [oC] 125 4 3.5 Quiescent Current [mA] Dropout Voltage [V] [V] 3 2.5 2 1.5 1 0.5 0 -40 -25 0 25 50 75 100 125 Vl Io=1A D TA, Ambient Temperature [oC] Figure 3. Quiescent Current Figure 4. Dropout Voltage Short Circuit Current[A] Sh 0.5 ort 0.45 Cir 0.4 cui 0.35 0.3 t 0.25 Cu 0.2 rre 0.15 nt 0.1 [A] 0.05 0.6 0.55 0 -0.05 -0.1 -40 -25 TA, Ambient Temperature [ oC] 0 25 50 75 100 125 Figure 5. Short Circuit Current 11 LM79XX Typical Applications + 2.2μF CI - VI 2 1 KA79XX 3 + 1μ F CO Input LM79XX Output - VO Figure 6. Negative Fixed output regulator + 15V + C1 1 MC7812 KA7812 2 3 + Co 1 μF 1 μF + Co 3 +12V 1N4001 0.33μF + 2.2μF * GND 1N4001 C1 1 2 KA7912 LM7912 * -12V - 15V Figure 7. Split power supply ( ± 12V/1A) Notes: (1) To specify an output voltage, substitute voltage value for "XX " (2) Required for stability. For value given, capacitor must be solid tantalum. If aluminium electronics are used, at least ten times value shown should be selected. CI is required if regulator is located an appreciable distance from power supply filter. (3) To improve transient response. If large capacitors are used, a high current diode from input to output (1N400l or similar) should be introduced to protect the device from momentary input short circuit. 12 LM79XX Mechanical Dimensions Package Dimensions in millimeters TO-220 [ SINGLE GAUGE ] 13 LM79XX Ordering Information Product Number LM7905CT LM7906CT LM7908CT LM7909CT LM7910CT LM7912CT LM7915CT LM7918CT LM7924CT ±4% TO-220 0 ~ +125°C Output Voltage Tolerance Package Operating Temperature 14 LM79XX DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. www.fairchildsemi.com 7/6/09 0.0m 001 Stock#DS400021 © 2009 Fairchild Semiconductor Corporation 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.