3-Terminal 1A Negative oltage Regulator www.fairchildsemi.com Features Output Current in Excess of 1A s of -5, -6, -8, -9, -10, -12, -15, -18, -24 Internal Thermal Overload Protection Short Circuit Protection Output Transistor Safe Operating Area Compensation Description The KA79XX/KA79XXA 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 shutdown and safe operating area protection, making it essentially indestructible. TO-220 in 1 1. GND 2. Input 3. Output Internal Block Digram GND R1 OLTAGE REFERENCE R2 + - Q1 Q2 Output I1 I2 PROTECTION CIRCUITRY Rsc In Input Rev. 1.0.1 2002 Fairchild Semiconductor Corporation
Absolute Maximum Ratings Parameter Symbol alue Unit Input oltage I -35 Thermal Resistance Junction-Case (1) RθJC 5 C/W Thermal Resistance Junction-Air (1, 2) RθJA 65 C/W Operating Temperature Range TOPR 0 ~ +125 C Storage Temperature Range TSTG - 65 ~ +150 C : 1. Thermal resistance test board Size: 76.2mm * 114.3mm * 1.6mm(1S0P) JEDEC standard: JESD51-3, JESD51-7 2. Assume no ambient airflow Electrical Characteristics (KA7905) (I = -10, IO = 500, 0 C TJ +125 C, CI =2.2µF, CO =1µF, unless otherwise specified.) TJ = +25 C -4.8-5.0-5.2 O IO = 5 to 1A, PO 15W -4.75-5.0-5.25 I = -7 to -20 Line Regulation (3) O TJ = +25 C I = -7 to -25-35 100 I = -8 to -12-8 50 TJ = +25 C, IO = 5 to 1.5A - 10 100 Load Regulation (3) O TJ =+25 C, IO = 250 to 750-3 50 Quiescent Current IQ TJ =+25 C - 3 6 I = -8 to -25-0.1 0.8 Temperature Coefficient of D o/ T IO = 5 - -0.4 - / C Output Noise oltage N f = 10Hz to 100kHz, TA = +25 C - 40 - µ Dropout oltage D TJ =+25 C, IO = 1A - 2 - Short Circuit Current ISC TJ =+25 C, I = -35-300 - Peak Current IPK TJ =+25 C - 2.2 - A 3. Load and line regulation are specified at constant junction temperature. Changes in O due to heating effects must be taken 2
Electrical Characteristics (KA7906) (Continued) (I = -11, IO = 500, 0 C TJ +125 C, CI =2.2µF, CO = 1µF, unless otherwise specified.) TJ =+25 C -5.75-6 -6.25 O IO = 5 to 1A, PO 15W -5.7-6 -6.3 I = -9 to -21 Line Regulation (1) O TJ = +25 C I = -8 to -25-10 120 I = -9 to -13-5 60 TJ = +25 C, IO = 5 to 1.5A - 10 120 Load Regulation (1) O TJ = +25 C, IO = 250 to 750-3 60 Quiescent Current IQ TJ = +25 C - 3 6 I = -8 to -25-0.1 1.3 Temperature Coefficient of D o/ T IO = 5 - -0.5 - / C Output Noise oltage N f = 10Hz to 100kHz, TA =+25 C - 130 - µ Dropout oltage D TJ = +25 C, IO = 1A - 2 - Short Circuit Current ISC TJ = +25 C, I = -35-300 - Peak Current IPK TJ = +25 C - 2.2 - A 1. Load and line regulation are specified at constant junction temperature. Changes in O due to heating effects must be taken 3
Electrical Characteristics (KA7908) (Continued) (I = -14, IO = 500, 0 C TJ +125 C, CI =2.2µF, CO =1µF, unless otherwise specified.) TJ =+25 C -7.7-8 -8.3 O IO = 5 to 1A, PO 15W -7.6-8 -8.4 I = -10 to -23 Line Regulation (1) O TJ = +25 C I = -10.5 to -25-10 160 I = -11 to -17-5 80 TJ = +25 C, IO = 5 to 1.5A - 12 160 Load Regulation (1) O TJ = +25 C, IO = 250 to 750-4 80 Quiescent Current IQ TJ = +25 C - 3 6 I = -10.5 to -25-0.1 1 Temperature Coefficient of D o/ T IO = 5 - -0.6 - / C Output Noise oltage N f = 10Hz to 100kHz, TA = +25 C - 175 - µ Dropout oltage D TJ =+25 C, IO = 1A - 2 - Short Circuit Current ISC TJ =+25 C, I = -35-300 - Peak Current IPK TJ = +25 C - 2.2 - A 1. Load and line regulation are specified at constant junction temperature. Changes in O due to heating effects must be taken 4
Electrical Characteristics (KA7909) (Continued) (I = -15, IO = 500, 0 C TJ +125 C, CI =2.2µF, CO =1µF, unless otherwise specified.) TJ = +25 C -8.7-9.0-9.3 O IO = 5 to 1A, PO 15W -8.6-9.0-9.4 I = -1.5 to -23 Line Regulation (1) O TJ =+25 C I = -11.5 to -26-10 180 I = -12 to -18-5 90 TJ =+25 C, IO = 5 to 1.5A - 12 180 Load Regulation (1) O TJ =+25 C, IO = 250 to 750-4 90 Quiescent Current IQ TJ = +25 C - 3 6 I = -11.5 to -26-0.1 1 Temperature Coefficient of D o/ T IO = 5 - -0.6 - / C Output Noise oltage N f = 10Hz to 100kHz, TA = +25 C - 175 - µ Dropout oltage D TJ = +25 C, IO = 1A - 2 - Short Circuit Current ISC TJ = +25 C, I = -35-300 - Peak Current IPK TJ = +25 C - 2.2 - A 1. Load and line regulation are specified at constant junction temperature. Changes in O due to heating effects must be taken 5
Electrical Characteristics (KA7910) (Continued) (I = -17, IO = 500, 0 C TJ +125 C, CI =2.2µF, CO =1µF, unless otherwise specified.) TJ = +25 C -9.6-10 -10.4 O IO = 5 to 1A, PO 15W -9.5-10 -10.5 I = -12 to -28 Line Regulation (1) O TJ = +25 C I = -12.5 to -28-12 200 I = -14 to -20-6 100 TJ = +25 C, IO = 5 to 1.5A - 12 200 Load Regulation (1) O TJ = +25 C, IO = 250 to 750-4 100 Quiescent Current IQ TJ = +25 C - 3 6 I = -12.5 to -28-0.1 1 Temperature Coefficient of O o/ T IO = 5 - -1 - / C Output Noise oltage N 10Hz f 100kHz, TA = +25 C - 280 - µ Dropout oltage D TJ = +25 C, IO = 1A - 2 - Short Circuit Current ISC TJ = +25 C, I = -35-300 - Peak Current IPK TJ = +25 C - 2.2 - A 1. Load and line regulation are specified at constant junction temperature. Changes in O due to heating effects must be taken 6
Electrical Characteristics (KA7912) (Continued) (I = -19, IO = 500, 0 C TJ +125 C, CI =2.2µF, CO =1µF, unless otherwise specified.) TJ = +25 C -11.5-12 -12.5 O IO = 5 to 1A, PO 15W -11.4-12 -12.6 I = -15.5 to -27 Line Regulation (1) O TJ = +25 C I = -14.5 to -30-12 240 I = -16 to -22-6 120 TJ = +25 C, IO = 5 to 1.5A - 12 240 Load Regulation (1) O TJ =+25 C, IO = 250 to 750-4 120 Quiescent Current IQ TJ =+25 C - 3 6 I = -14.5 to -30-0.1 1 Temperature Coefficient of D o/ T IO = 5 - -0.8 - / C Output Noise oltage N f = 10Hz to 100kHz, TA =+25 C - 200 - µ Dropout oltage D TJ = +25 C, IO = 1A - 2 - Short Circuit Current ISC TJ = +25 C, I = -35-300 - Peak Current IPK TJ = +25 C - 2.2 - A 1. Load and line regulation are specified at constant junction temperature. Changes in O due to heating effects must be taken 7
Electrical Characteristics (KA7915) (Continued) (I = -23, IO = 500, 0 C TJ +125 C, CI =2.2µF, CO =1µF, unless otherwise specified.) TJ = +25 C -14.4-15 -15.6 O IO = 5 to 1A, PO 15W -14.25-15 -15.75 I = -18 to -30 Line Regulation (1) O TJ = +25 C I = -17.5 to -30-12 300 I = -20 to -26-6 150 TJ = +25 C, IO = 5 to 1.5A - 12 300 Load Regulation (1) O TJ =+25 C, IO = 250 to 750-4 150 Quiescent Current IQ TJ =+25 C - 3 6 I = -17.5 to -30-0.1 1 Temperature Coefficient of D o/ T IO = 5 - -0.9 - / C Output Noise oltage N f = 10Hz to 100kHz, TA = +25 C - 250 - µ Dropout oltage D TJ = +25 C, IO = 1A - 2 - Short Circuit Current ISC TJ = +25 C, I = -35-300 - Peak Current IPK TJ = +25 C - 2.2 - A 1. Load and line regulation are specified at constant junction temperature. Changes in O due to heating effects must be taken 8
Electrical Characteristics (KA7918) (Continued) (I = -27, IO = 500, 0 C TJ +125 C, CI =2.2µF, CO =1µF, unless otherwise specified.) TJ = +25 C -17.3-18 -18.7 O IO = 5 to 1A, PO 15W -17.1-18 -18.9 I = -22.5 to -33 Line Regulation (1) O TJ = +25 C I = -21 to -33-15 360 I = -24 to -30-8 180 TJ = +25 C, IO = 5 to 1.5A - 15 360 Load Regulation (1) O TJ = +25 C, IO = 250 to 750-5 180 Quiescent Current IQ TJ = +25 C - 3 6 I = -21 to -33-0.1 1 Temperature Coefficient of D o/ T IO = 5 - -1 - / C Output Noise oltage N f = 10Hz to 100kHz, TA = +25 C - 300 - µ Dropout oltage D TJ = +25 C, IO = 1A - 2 - Short Circuit Current ISC TJ = +25 C, I = -35-300 - Peak Current IPK TJ =+25 C - 2.2 - A 1. Load and line regulation are specified at constant junction temperature. Changes in O due to heating effects must be taken 9
Electrical Characteristics (KA7924) (Continued) (I = -33, IO = 500, 0 C TJ +125 C, CI =2.2µF, CO =1µF, unless otherwise specified.) TJ = +25 C -23-24 -25 O IO = 5 to 1A, PO 15W -22.8-24 -25.2 I = -27 to -38 Line Regulation (1) O TJ =+25 C I = -27 to -38-15 480 I = -30 to -36-8 180 TJ = +25 C, IO = 5 to 1.5A - 15 480 Load Regulation (1) O TJ = +25 C, IO = 250 to 750-5 240 Quiescent Current IQ TJ = +25 C - 3 6 I = -27 to -38-0.1 1 Temperature Coefficient of D o/ T IO = 5 - -1 - / C Output Noise oltage N f = 10Hz to 100kHz, TA =+25 C - 400 - µ Dropout oltage D TJ =+25 C, IO = 1A - 2 - Short Circuit Current ISC TJ =+25 C, I = -35-300 - Peak Current IPK TJ =+25 C - 2.2 - A 1. Load and line regulation are specified at constant junction temperature. Changes in O due to heating effects must be taken 10
Electrical Characteristics (KA7905A) (Continued) (I = -10, IO = 500, 0 C TJ +125 C, CI =2.2µF, CO =1µF, unless otherwise specified.) TJ = +25 C -4.9-5.0-5.1 O IO = 5 to 1A, PO 15W -4.8-5.0-5.2 I = -7 to -20 Line Regulation (1) O TJ = +25 C I = -7 to -20 IO = 1A - 5 50 I = -8 to -12 IO = 1A - 2 25 I = -7.5 to -25-7 50 I = -8 to -12, IO=1A - 7 50 IO = 5 to 1.5A - 10 100 Load Regulation (1) O TJ = +25 C TJ =+25 C, IO = 250 to 750-3 50 Quiescent Current IQ TJ =+25 C - 3 6 I = -8 to -25-0.1 0.8 Temperature Coefficient of D o/ T IO = 5 - -0.4 - / C Output Noise oltage N f = 10Hz to 100kHz, TA =+25 C - 40 - µ Dropout oltage D TJ = +25 C, IO = 1A - 2 - Short Circuit Current ISC TJ = +25 C, I = -35-300 - Peak Current IPK TJ = +25 C - 2.2 - A 1. Load and line regulation are specified at constant junction temperature. Changes in O due to heating effects must be taken 11
Electrical Characteristics (KA7912A) (Continued) (I = -19, IO = 500, 0 C TJ +125 C, CI =2.2µF, CO =1µF, unless otherwise specified.) TJ =+25 C -11.75-12 -12.25 O IO = 5 to 1A, PO 15W -11.5-12 -12.5 I = -15.5 to -27 Line Regulation (1) O TJ = +25 C I = -14.5 to -27 Io = 1A - 12 120 I= -16 to -22 Io = 1A - 6 60 I = -14.8 to -30-12 120 I = -16 to -22, Io = 1A - 12 120 TJ =+25 C, IO = 5 to 1.5A - 12 150 Load Regulation (1) O TJ =+25 C, IO = 250 to 750-4 75 Quiescent Current IQ TJ =+25 C - 3 6 I = -15 to -30-0.1 1 Temperature Coefficient of D o/ T IO = 5 - -0.8 - / C Output Noise oltage N f = 10Hz to 100kHz, TA =+25 C - 200 - µ Dropout oltage D TJ =+25 C, IO = 1A - 2 - Short Circuit Current ISC TJ =+25 C, I = -35-300 - Peak Current IPK TJ =+25 C - 2.2 - A 1. Load and line regulation are specified at constant junction temperature. Changes in O due to heating effects must be taken 12
Electrical Characteristics (KA7915A) (Continued) (I = -23, IO = 500, 0 C TJ +125 C, CI =2.2µF, CO =1µF, unless otherwise specified.) TJ = +25 C -14.7-15 -15.3 O IO = 5 to 1A, PO 15W -14.4-15 -15.6 I = -18 to -30 Line Regulation (1) O TJ =+25 C I = -17.5 to -30 Io = 1A - 12 150 I = -20 to -26 Io = 1A - 6 75 I = -17.9 to -30-12 150 I = -20 to -26, Io = 1A - 6 150 TJ = +25 C, IO = 5 to 1.5A - 12 150 Load Regulation (1) O TJ = +25 C, IO = 250 to 750-4 75 Quiescent Current IQ TJ =+25 C - 3 6 I = -18.5 to -30-0.1 1 Temperature Coefficient of D o/ T IO = 5 - -0.9 - / C Output Noise oltage N f = 10Hz to 100kHz, TA =+25 C - 250 - µ Dropout oltage D TJ = +25 C, IO = 1A - 2 - Short Circuit Current ISC TJ =+25 C, I = -35-300 - Peak Current IPK TJ =+25 C - 2.2 - A 1. Load and line regulation are specified at constant junction temperature. Changes in O due to heating effects must be taken 13
Typical Performance Characteristics Ou tp ut [-] o lta 5.1 5.05 4.95 5 ge [- 4.9 ] 4.85 4.8 in=10 Io=40 in=25 Io=100-40 -25 0 25 50 75 100 125 TA, Ambient Temperature [ o C] 5 Load Regulation[] 15 13 Lo ad 11 Re 9 gul 7 ati 5 on 3 [m 1 ] -1-3 -5 Io=1.5A Io=0.75A -40-25 0 25 50 75 100 125 TA, Ambient Temperature [ o C] Figure 1. Figure 2. Load Regulation Quiescent Current [] 5 4.5 4 3.5 3 2.5 2 1.5 1 0.5 0-40 -25 0 25 50 75 100 125 TA, Ambient Temperature [ o C] D t lt [] Dropout oltage [] 4 3.5 3 2.5 2 1.5 Io=1A 1 0.5 0-40 -25 0 25 50 75 100 125 TA, Ambient Temperature [ o C] Figure 3. Quiescent Current Figure 4. Dropout oltage Short Circuit Current[A] 0.6 0.55 Sh 0.5 ort 0.45 Cir 0.4 cui0.35 0.3 t 0.25 Cu 0.2 rre0.15 nt 0.1 [A] 0.05 0-0.05-0.1-40 -25 0 25 50 75 100 125 TA, Ambient Temperature [ o C] Figure 5. Short Circuit Current 14
Typical Applications Input 2.2uF + + CI 1 2 3 KA79XX 1uF Co Output Figure 6. Negative Fixed output regulator +15 1 3 KA7812 +12 C1 + 0.33uF 2 Co + 1uF 1N4001 * GND -15 C1 + 2.2uF 1uF Co 1 2 3 KA7912 + 1N4001 * -12 Figure 7. Split power supply ( ± 12/1A) : (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. 15
Mechanical Dimensions Package Dimensions in millimeters TO-220 9.90 ±0.20 4.50 ±0.20 (1.70) 1.30 ±0.10 (8.70) ø3.60 ±0.10 2.80 ±0.10 1.30 +0.10 0.05 9.20 ±0.20 13.08 ±0.20 (1.46) (1.00) 1.27 ±0.10 (45 ) (3.00) (3.70) 15.90 ±0.20 1.52 ±0.10 10.08 ±0.30 18.95MAX. 2.54TYP [2.54 ±0.20] 0.80 ±0.10 2.54TYP [2.54 ±0.20] 0.50 +0.10 0.05 2.40 ±0.20 10.00 ±0.20 16
Ordering Information Product Number Tolerance Package Operating Temperature KA7905 KA7906 KA7908 KA7909 KA7910 ±4% KA7912 KA7915 KA7918 KA7924 KA7905A TO-220 0 ~ +125 C KA7912A ±2% KA7915A 17
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