KA79XX/KA79XXA. 3-Terminal 1A Negative Voltage Regulator. Features. Description. Internal Block Digram.
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1 3-Terminal 1A Negative oltage Regulator Features Output Current in Excess of 1A s of -5, -6, -8, -9, -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 (Dual Gauge) in 1 1. GND 2. Input 3. Output Internal Block Digram GND R1 LTAGE REFERENCE R2 + - Q1 Q2 Output I1 I2 PROTECTION CIRCUITRY Rsc In Input Rev Fairchild Semiconductor Corporation
2 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, JESD Assume no ambient airflow Electrical Characteristics (KA7905) (I = -10, IO = 500, 0 C TJ +125 C, CI =2.2μF, CO =1μF, unless otherwise specified.) Line Regulation (3) Δ TJ = +25 C TJ = +25 C IO = 5 to 1A, PO 15W I = -7 to I = -7 to I = -8 to TJ = +25 C, IO = 5 to 1.5A Load Regulation (3) Δ TJ =+25 C, IO = 250 to Quiescent Current IQ TJ =+25 C IO = 5 to 1A I = -8 to Temperature Coefficient of D Δo/ΔT IO = / C Output Noise oltage N f = 10Hz to 100kHz, TA = +25 C μ Dropout oltage D TJ =+25 C, IO = 1A Short Circuit Current ISC TJ =+25 C, I = Peak Current IPK TJ =+25 C A 3. Load and line regulation are specified at constant junction temperature. Changes in due to heating effects must be taken 2
3 Electrical Characteristics (KA7906) (Continued) (I = -11, IO = 500, 0 C TJ +125 C, CI =2.2μF, CO = 1μF, unless otherwise specified.) Line Regulation (1) Δ TJ = +25 C TJ =+25 C IO = 5 to 1A, PO 15W I = -9 to I = -8 to I = -9 to TJ = +25 C, IO = 5 to 1.5A Load Regulation (1) Δ TJ = +25 C, IO = 250 to Quiescent Current IQ TJ = +25 C IO = 5 to 1A I = -8 to Temperature Coefficient of D Δo/ΔT IO = / C Output Noise oltage N f = 10Hz to 100kHz, TA =+25 C μ Dropout oltage D TJ = +25 C, IO = 1A Short Circuit Current ISC TJ = +25 C, I = Peak Current IPK TJ = +25 C A 1. Load and line regulation are specified at constant junction temperature. Changes in due to heating effects must be taken 3
4 Electrical Characteristics (KA7908) (Continued) (I = -14, IO = 500, 0 C TJ +125 C, CI =2.2μF, CO =1μF, unless otherwise specified.) Line Regulation (1) Δ TJ = +25 C TJ =+25 C IO = 5 to 1A, PO 15W I = -10 to I = to I = -11 to TJ = +25 C, IO = 5 to 1.5A Load Regulation (1) Δ TJ = +25 C, IO = 250 to Quiescent Current IQ TJ = +25 C IO = 5 to 1A I = to Temperature Coefficient of D Δo/ΔT IO = / C Output Noise oltage N f = 10Hz to 100kHz, TA = +25 C μ Dropout oltage D TJ =+25 C, IO = 1A Short Circuit Current ISC TJ =+25 C, I = Peak Current IPK TJ = +25 C A 1. Load and line regulation are specified at constant junction temperature. Changes in due to heating effects must be taken 4
5 Electrical Characteristics (KA7909) (Continued) (I = -15, IO = 500, 0 C TJ +125 C, CI =2.2μF, CO =1μF, unless otherwise specified.) Line Regulation (1) Δ TJ =+25 C TJ = +25 C IO = 5 to 1A, PO 15W I = -1.5 to I = to I = -12 to TJ =+25 C, IO = 5 to 1.5A Load Regulation (1) Δ TJ =+25 C, IO = 250 to Quiescent Current IQ TJ = +25 C IO = 5 to 1A I = to Temperature Coefficient of D Δo/ΔT IO = / C Output Noise oltage N f = 10Hz to 100kHz, TA = +25 C μ Dropout oltage D TJ = +25 C, IO = 1A Short Circuit Current ISC TJ = +25 C, I = Peak Current IPK TJ = +25 C A 1. Load and line regulation are specified at constant junction temperature. Changes in due to heating effects must be taken 5
6 Electrical Characteristics (KA7912) (Continued) (I = -19, IO = 500, 0 C TJ +125 C, CI =2.2μF, CO =1μF, unless otherwise specified.) Line Regulation (1) Δ TJ = +25 C TJ = +25 C IO = 5 to 1A, PO 15W I = to I = to I = -16 to TJ = +25 C, IO = 5 to 1.5A Load Regulation (1) Δ TJ =+25 C, IO = 250 to Quiescent Current IQ TJ =+25 C IO = 5 to 1A I = to Temperature Coefficient of D Δo/ΔT IO = / C Output Noise oltage N f = 10Hz to 100kHz, TA =+25 C μ Dropout oltage D TJ = +25 C, IO = 1A Short Circuit Current ISC TJ = +25 C, I = Peak Current IPK TJ = +25 C A 1. Load and line regulation are specified at constant junction temperature. Changes in due to heating effects must be taken 6
7 Electrical Characteristics (KA7915) (Continued) (I = -23, IO = 500, 0 C TJ +125 C, CI =2.2μF, CO =1μF, unless otherwise specified.) Line Regulation (1) Δ TJ = +25 C TJ = +25 C IO = 5 to 1A, PO 15W I = -18 to I = to I = -20 to TJ = +25 C, IO = 5 to 1.5A Load Regulation (1) Δ TJ =+25 C, IO = 250 to Quiescent Current IQ TJ =+25 C IO = 5 to 1A I = to Temperature Coefficient of D Δo/ΔT IO = / C Output Noise oltage N f = 10Hz to 100kHz, TA = +25 C μ Dropout oltage D TJ = +25 C, IO = 1A Short Circuit Current ISC TJ = +25 C, I = Peak Current IPK TJ = +25 C A 1. Load and line regulation are specified at constant junction temperature. Changes in due to heating effects must be taken 7
8 Electrical Characteristics (KA7918) (Continued) (I = -27, IO = 500, 0 C TJ +125 C, CI =2.2μF, CO =1μF, unless otherwise specified.) Line Regulation (1) Δ TJ = +25 C TJ = +25 C IO = 5 to 1A, PO 15W I = to I = -21 to I = -24 to TJ = +25 C, IO = 5 to 1.5A Load Regulation (1) Δ TJ = +25 C, IO = 250 to Quiescent Current IQ TJ = +25 C IO = 5 to 1A I = -21 to Temperature Coefficient of D Δo/ΔT IO = / C Output Noise oltage N f = 10Hz to 100kHz, TA = +25 C μ Dropout oltage D TJ = +25 C, IO = 1A Short Circuit Current ISC TJ = +25 C, I = Peak Current IPK TJ =+25 C A 1. Load and line regulation are specified at constant junction temperature. Changes in due to heating effects must be taken 8
9 Electrical Characteristics (KA7924) (Continued) (I = -33, IO = 500, 0 C TJ +125 C, CI =2.2μF, CO =1μF, unless otherwise specified.) Line Regulation (1) Δ TJ =+25 C TJ = +25 C IO = 5 to 1A, PO 15W I = -27 to I = -27 to I = -30 to TJ = +25 C, IO = 5 to 1.5A Load Regulation (1) Δ TJ = +25 C, IO = 250 to Quiescent Current IQ TJ = +25 C IO = 5 to 1A I = -27 to Temperature Coefficient of D Δo/ΔT IO = / C Output Noise oltage N f = 10Hz to 100kHz, TA =+25 C μ Dropout oltage D TJ =+25 C, IO = 1A Short Circuit Current ISC TJ =+25 C, I = Peak Current IPK TJ =+25 C A 1. Load and line regulation are specified at constant junction temperature. Changes in due to heating effects must be taken 9
10 Electrical Characteristics (KA7912A) (Continued) (I = -19, IO = 500, 0 C TJ +125 C, CI =2.2μF, CO =1μF, unless otherwise specified.) Line Regulation (1) Δ TJ =+25 C IO = 5 to 1A, PO 15W I = to -27 TJ = +25 C I = to -27 Io = 1A I= -16 to -22 Io = 1A I = to I = -16 to -22, Io = 1A TJ =+25 C, IO = 5 to 1.5A Load Regulation (1) Δ TJ =+25 C, IO = 250 to Quiescent Current IQ TJ =+25 C IO = 5 to 1A I = -15 to Temperature Coefficient of D Δo/ΔT IO = / C Output Noise oltage N f = 10Hz to 100kHz, TA =+25 C μ Dropout oltage D TJ =+25 C, IO = 1A Short Circuit Current ISC TJ =+25 C, I = Peak Current IPK TJ =+25 C A 1. Load and line regulation are specified at constant junction temperature. Changes in due to heating effects must be taken 10
11 Electrical Characteristics (KA7915A) (Continued) (I = -23, IO = 500, 0 C TJ +125 C, CI =2.2μF, CO =1μF, unless otherwise specified.) Line Regulation (1) Δ TJ = +25 C IO = 5 to 1A, PO 15W I = -18 to -30 TJ =+25 C I = to -30 Io = 1A I = -20 to -26 Io = 1A I = to I = -20 to -26, Io = 1A TJ = +25 C, IO = 5 to 1.5A Load Regulation (1) Δ TJ = +25 C, IO = 250 to Quiescent Current IQ TJ =+25 C IO = 5 to 1A I = to Temperature Coefficient of D Δo/ΔT IO = / C Output Noise oltage N f = 10Hz to 100kHz, TA =+25 C μ Dropout oltage D TJ = +25 C, IO = 1A Short Circuit Current ISC TJ =+25 C, I = Peak Current IPK TJ =+25 C A 1. Load and line regulation are specified at constant junction temperature. Changes in due to heating effects must be taken 11
12 Typical Performance Characteristics Ou tp ut [-] o lta ge [- 4.9 ] in=10 Io=40 in=25 Io= TA, Ambient Temperature [ o C] 5 Load Regulation[] Lo ad 11 Re 9 gul 7 ati 5 on 3 [m 1 ] Io=1.5A Io=0.75A TA, Ambient Temperature [ o C] Figure 1. Figure 2. Load Regulation Quiescent Current [] T A, Ambient Temperature [ o C] D l [] Dropout oltage [] Io=1A T A, Ambient Temperature [ o C] Figure 3. Quiescent Current Figure 4. Dropout oltage Short Circuit Current[A] Sh 0.5 ort 0.45 Cir 0.4 cui t 0.25 Cu 0.2 rre0.15 nt 0.1 [A] TA, Ambient Temperature [ o C] Figure 5. Short Circuit Current 12
![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.](/docs-images/46/21773937/images/page_12.jpg "5 0-40 -25 0 25 50 75 100 125 T A, Ambient Temperature [ o C] D l [] 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 T A, Ambient Temperature [ o C] Figure 3.")
13 Typical Applications Input 2.2uF + + CI KA79XX 1uF Co Output Figure 6. Negative Fixed output regulator KA C uF 2 Co + 1uF 1N4001 * GND -15 C uF 1uF Co KA N4001 * -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. 13
14 Mechanical Dimensions Package Dimensions in millimeters TO-220 [DUAL GAUGE] 9.90 ± ±0.20 (1.70) 1.30 ±0.10 (8.70) ø3.60 ± ± ± ±0.20 (1.46) (1.00) 1.27 ±0.10 (45 ) (3.00) (3.70) ± ± ± MAX. 2.54TYP [2.54 ±0.20] 0.80 ± TYP [2.54 ±0.20] ± ±
15 Ordering Information Product Number Tolerance Package Operating Temperature KA7905TU KA7906TU KA7908TU KA7909TU ±4% KA7912TU TO-220 (Dual Gauge) 0 ~ +125 C KA7915TU KA7918TU KA7924TU KA7912ATU KA7915ATU ±2% 15
16 DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROE 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 CONEY 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 DEICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROAL 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. 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. 6/14/12 0.0m 001 Stock#DS Fairchild Semiconductor Corporation
17 Mouser Electronics Authorized Distributor Click to iew Pricing, Inventory, Delivery & Lifecycle Information: Fairchild Semiconductor: KA7912ATU
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