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KA79XX/KA79XXA
3-Terminal 1A Negative Voltage Regulator r
Features
* * * * * Output Current in Excess of 1A Output Voltages of-5, -6, -8, -9, -10, -12, -15, -18 , -24V 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
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. 1.0.0
(c)2001 Fairchild Semiconductor Corporation
KA79XX/KA79XXA
Absolute Maximum Ratings
Parameter Input Voltage Thermal Resistance Junction-Cases Junction-Air Operating Temperature Range Storage Temperature Range Symbol VI RJC RJA TOPR TSTG Value -35 5 65 0 ~ +125 - 65 ~ +150 Unit V C/ W
oC o
C
Electrical Characteristics (KA7905)
(VI = -10V, IO = 500mA, 0C TJ +125C, CI =2.2F, CO =1F, unless otherwise specified.) Parameter Output Voltage Symbol TJ=+25C VO IO = 5mA to 1A, PO 15W VI = -7V to -20V VI = -7V to -20V IO=1A VI = -8V to -12V IO=1A Conditions Min. Typ. Max. - 4.8 - 5.0 - 5.2 - 4.75 -5.0 - 5.25 54 5 2 7 7 10 3 3 0.05 0.1 - 0.4 40 60 2 300 2.2 50 25 50 50 100 mV 50 6 0.5 0.8 mA mA mV/C V dB V mA A V Unit
TJ=+25C Line Regulation (Note1) VO VI = -7.5V to -25V VI= -8V to -12V IO=1A VO TJ = +25C IO = 5mA to 1.5A
mV
Load Regulation (Note1)
TJ =+25C IO = 250mA to 750mA TJ =+25C IO = 5mA to 1A VI = -8V to -25V IO = 5mA f = 10Hz to 100KHz TA =+25C f = 120Hz VI = 10V TJ=+25C IO = 1A TJ =+25C, VI = -35V TJ =+25C
Quiescent Current Quiescent Current Change
IQ IQ
Temperature Coefficient of VD Vo/T Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current 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.
2
KA79XX/KA79XXA
Electrical Characteristics (KA7906)
(VI = -11V, IO = 500mA, 0C TJ +125C, CI =2.2F, CO =1F, unless otherwise specified.) Parameter Output Voltage Symbol TJ=+25C VO IO = 5mA to 1A, PO 15W VI = - 9V to - 21V TJ=+25C TJ=+25C IO = 5mA to 1.5A TJ =+25C IO = 250mA to 750mA TJ =+25C IO = 5mA to 1A VI = -9V to -25V IO = 5mA f = 10Hz to 100KHz TA =+25C f = 120Hz VI = 10V TJ=+25C IO = 1A TJ =+25C, VI = -35V TJ =+25C VI = - 8V to - 25V VI = - 9V to -12V Conditions Min. - 5.75 - 5.7 54 Typ. -6 -6 10 5 10 3 3 -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 V dB V mA A V Unit
Line Regulation (Note1)
VO
mV
Load Regulation (Note1)
VO
Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current
IQ IQ Vo/T 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
KA79XX/KA79XXA
Electrical Characteristics (KA7908)
(VI = -14V, IO = 500mA, 0C TJ +125C, CI =2.2F, CO =1F, unless otherwise specified.) Parameter Output Voltage Symbol TJ=+25C VO IO = 5mA to 1A, PO 15W VI = -10V to -23V TJ=+25C VI = -10.5V to -25V VI= -11V to -17V Conditions 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 - 8.4 100 80 160 mV 80 6 0.5 1 mA mA mV/C V dB V mA A V Unit
Line Regulation (Note1)
VO
mV
Load Regulation (Note1)
VO
TJ=+25C IO = 5mA to 1.5A TJ =+25C IO = 250mA to 750mA TJ =+25C IO = 5mA to 1A VI = -11.5V to -25V IO = 5mA f = 10Hz to 100KHz TA =+25C f = 120Hz VI = 10V TJ=+25C IO = 1A TJ =+25C, VI = -35V TJ =+25C
Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current
IQ IQ Vo/T 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
KA79XX/KA79XXA
Electrical Characteristics (KA7909)
(VI = -14V, IO = 500mA, 0C TJ +125C, CI =2.2F, CO =1F, unless otherwise specified.) Parameter Output Voltage Symbol TJ=+25C VO IO = 5mA to 1A, PO 15W VI = -1.5V to -23V TJ=+25C TJ=+25C IO = 5mA to 1.5A TJ =+25C IO = 250mA to 750mA TJ =+25C IO = 5mA to 1A VI = -11.5V to -25V IO = 5mA f = 10Hz to 100KHz TA =+25C f = 120Hz VI = 10V TJ=+25C IO = 1A TJ =+25C, VI = -35V TJ =+25C VI = -10.5V to -25V VI = -11V to -17V 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 V dB V mA A V Unit
Line Regulation (Note1)
VO
mV
Load Regulation (Note1)
VO
Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current
IQ IQ Vo/T 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
KA79XX/KA79XXA
Electrical Characteristics (KA7910)
(VI = -17V, IO = 500mA, 0C TJ +125C, CI =2.2F, CO =1F, unless otherwise specified.) Parameter Output Voltage Symbol TJ=+25C VO IO = 5mA to 1A, PO15W VI = -12V to -28 TJ=+25C TJ=+25C IO = 5mA to 1.5A TJ =+25C IO = 250mA to 750mA TJ =+25C IO = 5mA to 1A VI = -13 to -28V IO = 5mA 10Hz f 100KHz TA =+25C f = 120Hz VI = 10V TJ=+25C IO = 1A TJ =+25C, VI = -35V TJ =+25C VI = -12.5V to -28V VI = -14V to -20V Conditions Min. - 10.5 - 10.4 54 Typ. - 10 - 10 12 6 12 4 3 0.05 0.1 -1 280 60 2 300 2.2 Max. - 11.5 - 11.6 200 100 200 mV 100 6 0.5 1 mA mA mV/C V dB V mA A V Unit
Line Regulation (Note1)
VO
mV
Load Regulation (Note1)
VO
Quiescent Current Quiescent Current Change Temperature Coefficient of VO Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current
IQ IQ Vo/T 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
KA79XX/KA79XXA
Electrical Characteristics (KA7912)
(VI = -18V, IO = 500mA, 0C TJ +125C, CI =2.2F, CO =1F, unless otherwise specified.) Parameter Output Voltage Symbol TJ=+25C VO IO = 5mA to 1A, PO 15W VI = -15.5V to -27V TJ=+25C TJ=+25C IO = 5mA to 1.5A TJ =+25C IO = 250mA to 750mA TJ =+25C IO = 5mA to 1A VI = -15V to -30V IO = 5mA f = 10Hz to 100KHz TA =+25C f = 120Hz VI = 10V TJ=+25C IO = 1A TJ =+25C, VI = -35V TJ =+25C 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 V dB V mA A V Unit
Line Regulation (Note1)
VO
mV
Load Regulation (Note1)
VO
Quiescent Current Quiescent Current Change
IQ IQ
Temperature Coefficient of VD Vo/T Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current 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
KA79XX/KA79XXA
Electrical Characteristics (KA7915)
(VI = -23V, IO = 500mA, 0C TJ +125C, CI =2.2F, CO =1F, unless otherwise specified.) Parameter Output Voltage Symbol TJ=+25C VO IO = 5mA to 1A, PO 15W VI = -18V to -30V TJ=+25C TJ=+25C IO = 5mA to 1.5A TJ =+25C IO = 250mA to 750mA TJ =+25C IO = 5mA to 1A VI = -18.5V to -30V IO = 5mA f = 10Hz to 100KHz TA =+25C f = 120Hz VI = 10V TJ=+25C IO = 1A TJ =+25C, VI = -35V TJ =+25C 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 V dB V mA A V Unit
Line Regulation (Note1)
VO
mV
Load Regulation (Note1)
VO
Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current
IQ IQ Vo/T 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
KA79XX/KA79XXA
Electrical Characteristics (KA7918)
(VI = -27V, IO = 500mA, 0C TJ +125C, CI =2.2F, CO =1F, unless otherwise specified.) Parameter Output Voltage Symbol TJ=+25C VO IO = 5mA to 1A, PO 15W VI = -22.5V to -33V TJ=+25C VI = -21V to -33V VI = -24V to -30V Conditions Min. -17.3 -17.1 54 Typ. -18 -18 15 8 15 5 3 -1 300 60 2 300 2.2 Max. -18.7 -18.9 360 180 360 mV 180 6 0.5 1 mA mA mV/C V dB V mA A V Unit
Line Regulation (Note1)
VO
mV
Load Regulation (Note1)
VO
TJ=+25C IO = 5mA to 1.5A TJ =+25C IO = 250mA to 750mA TJ =+25C IO = 5mA to 1A VI = -22V to -33V IO = 5mA f = 10Hz to 100KHz TA =+25C f = 120Hz VI = 10V TJ=+25C IO = 1A TJ =+25C, VI = -35V TJ =+25C
Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current
IQ IQ Vo/T 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
KA79XX/KA79XXA
Electrical Characteristics (KA7924)
(VI = -33V, IO = 500mA, 0C TJ +125C, CI =2.2F, CO =1F, unless otherwise specified.) Parameter Output Voltage Symbol TJ=+25C VO IO = 5mA to 1A, PO 15W VI = -27V to -38V TJ=+25C TJ=+25C IO = 5mA to 1.5A TJ =+25C IO = 250mA to 750mA TJ =+25C IO = 5mA to 1A VI = -27V to -38V IO = 5mA f = 10Hz to 100KHz TA =+25C f = 120Hz VI = 10V TJ=+25C IO = 1A TJ =+25C, VI = -35V TJ =+25C VI = - 27V to - 38V VI = - 30V to - 36V Conditions Min. Typ. Max. Unit - 23 - 24 - 25 V
- 22.8 - 24 - 25.2 54 15 8 15 5 3 -1 400 60 2 300 2.2 480 180 480
Line Regulation (Note1)
VO
mV
Load Regulation (Note1)
VO
mV 240 6 0.5 1 mA mA mV/ C V dB V mA A
Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current
IQ IQ Vo/T 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
KA79XX/KA79XXA
Electrical Characteristics (KA7905A)
(VI = -10V, IO = 500mA, 0C TJ +125C, CI =2.2F, CO =1F, unless otherwise specified.) Parameter Output Voltage Symbol TJ=+25C VO IO = 5mA to 1A, PO 15W VI = -7V to -20V VI = -7V to -20V IO=1A VI = -8V to -12V IO=1A Conditions Min. - 4.9 - 4.8 54 Typ. - 5.0 -5.0 5 2 7 7 10 3 3 0.05 0.1 - 0.4 40 60 2 300 2.2 Max. - 5.1 - 5.2 50 25 mV 50 50 100 50 6 0.5 0.8 mV mA mA mV/C V dB V mA A V Unit
TJ=+25C Line Regulation (Note1) VO
TJ=+25C VI = -7.5V to -25V VI= -8V to -12V IO=1A IO = 5mA to 1.5A
Load Regulation (Note1) Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current
VO IQ IQ Vo/T VN RR VD ISC IPK
TJ =+25C IO = 250mA to 750mA TJ =+25C IO = 5mA to 1A VI = -8V to -25V IO = 5mA f = 10Hz to 100KHz TA =+25C f = 120Hz VI = 10V TJ=+25C IO = 1A TJ =+25C, VI = -35V TJ =+25C
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.
11
KA79XX/KA79XXA
Electrical Characteristics (KA7912A)
(VI = -18V, IO = 500mA, 0C TJ +125C, CI =2.2F, CO =1F, unless otherwise specified.) Parameter Output Voltage Symbol TJ=+25C VO IO = 5mA to 1A, PO 15W VI = -15.5V to -27V TJ=+25C TJ=+25C IO = 5mA to 1.5A TJ =+25C IO = 250mA to 750mA TJ =+25C IO = 5mA to 1A VI = -15V to -30V IO = 5mA f = 10Hz to 100KHz TA =+25C f = 120Hz VI = 10V TJ=+25C IO = 1A TJ =+25C, VI = -35V TJ =+25C VI = -14.5V to -30V VI= -16V to -22V Conditions Min. -11.75 -11.5 54 Typ. -12 -12 12 6 12 4 3 0.05 0.1 -0.8 200 60 2 300 2.2 Max. -12.25 -12.5 240 120 240 mV 120 6 0.5 1 mA mA mV/C V dB V mA A V Unit
Line Regulation (Note1)
VO
mV
Load Regulation (Note1)
VO
Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current
IQ IQ Vo/T 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.
12
KA79XX/KA79XXA
Electrical Characteristics (KA7915A)
(VI = -18V, IO = 500mA, 0C TJ +125C, CI =2.2F, CO =1F, unless otherwise specified.) Parameter Output Voltage Symbol TJ=+25C VO IO = 5mA to 1A, PO 15W VI = -18V to -30V TJ=+25C TJ=+25C IO = 5mA to 1.5A TJ =+25C IO = 250mA to 750mA TJ =+25C IO = 5mA to 1A VI = -18.5V to -30V IO = 5mA f = 10Hz to 100KHz TA =+25C f = 120Hz VI = 10V TJ=+25C IO = 1A TJ =+25C, VI = -35V TJ =+25C VI = -17.5V to -30V VI = -20V to -26V Conditions Min. Typ. Max. -14.7 -15 -15.3 -14.4 -15 -15.6 54 12 6 12 4 3 0.05 0.1 -0.9 250 60 2 300 2.2 300 150 300 mV 150 6 0.5 1 mA mA mV/C V dB V mA A V Unit
Line Regulation (Note1)
VO
mV
Load Regulation (Note1)
VO
Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current
IQ IQ Vo/T 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.
13
KA79XX/KA79XXA
Typical Perfomance Characteristics
5.1
15
Ou 5.05 tp 5 ut Vo lta 4.95 ge [- 4.9 V]
4.85 4.8 -40 -25 0 25 50
Vin=25V Io=100mA
Load Regulation[mV]
Output Voltage[-V]
Vin=10V Io=40mA
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
5
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
t V lt
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
14
KA79XX/KA79XXA
Typical Applications
+ 2.2F + 1F CO
CI - VI 2
1 KA79XX 3
Input
Output
- VO
Figure 6. Negative Fixed output regulator
+ 15V
C1
1 +
KA7812 2
3
Co+
+12V
1N4001
0.33F
+ 2.2F
1F 1F +
*
GND
1N4001
C1
1 2 KA7912
Co
- 15V
3
*
-12V
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.
15
KA79XX/KA79XXA
Mechanical Dimensions
Package
TO-220
9.90 0.20
1.30 0.10 2.80 0.10
4.50 0.20
(8.70) o3.60 0.10
(1.70)
1.30 -0.05
+0.10
9.20 0.20
(1.46)
13.08 0.20
(1.00)
(3.00)
15.90 0.20
1.27 0.10
1.52 0.10
0.80 0.10 2.54TYP [2.54 0.20] 2.54TYP [2.54 0.20]
10.08 0.30
18.95MAX.
(3.70)
(45 )
0.50 -0.05
+0.10
2.40 0.20
10.00 0.20
16
KA79XX/KA79XXA
Ordering Information
Product Number KA7905 KA7906 KA7908 KA7909 KA7910 KA7912 KA7915 KA7918 KA7924 KA7905A KA7912A KA7915A 2% 4% TO-220 0 ~ + 125C Output Voltage Tolerance Package Operating Temperature
17
KA79XX/KA79XXA
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 6/1/01 0.0m 001 Stock#DSxxxxxxxx 2001 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.

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