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MC79XX/MC79XXA/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 MC79XX / MC79XXA/ 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. 1.0.1
(c)2002 Fairchild Semiconductor Corporation
MC79XX/MC79XXA/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 RJC RJA TOPR TSTG
Value -35 5 65 0 ~ +125 -65 ~ +150
Unit V C/W C C
Electrical Characteristics (MC7905/LM7905)
(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 TJ = +25C TJ = +25C IO = 5mA to 1.5A 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 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 V dB V mA A V Unit
Line Regulation (Note3)
VO
mV
Load Regulation (Note3)
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 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
MC79XX/MC79XXA/LM79XX
Electrical Characteristics (MC7906) (Continued)
(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 = -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 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 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
MC79XX/MC79XXA/LM79XX
Electrical Characteristics (MC7908) (Continued)
(VI = -14V, IO = 500mA, 0C TJ +125C, CI =2.2F, CO =1F, unless otherwise specified.) Parameter Output Voltage Symbol VO Conditions TJ = +25C IO = 5mA to 1A, PO 15W VI = -10V to -23V TJ = +25C 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 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 = -10.5V 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
MC79XX/MC79XXA/LM79XX
Electrical Characteristics (MC7909) (Continued)
(VI = -15V, 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 -26V IO = 5mA f = 10Hz to 100kHz TA = +25C f = 120Hz VI = 10V TJ = +25C IO = 1A TJ = +25C, VI = -35V TJ = +25C 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 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
MC79XX/MC79XXA/LM79XX
Electrical Characteristics (MC7910) (Continued)
(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, Pd 15W 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 = -12.5V 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. -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 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
MC79XX/MC79XXA/LM79XX
Electrical Characteristics (MC7912) (Continued)
(VI = -19V, 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 = -14.5V 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 = -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 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.
7
MC79XX/MC79XXA/LM79XX
Electrical Characteristics (MC7915) (Continued)
(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 = -17.5V 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
MC79XX/MC79XXA/LM79XX
Electrical Characteristics (MC7918) (Continued)
(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 TJ = +25C IO = 5mA to 1.5A TJ = +25C IO = 250mA to 750mA TJ = +25C IO = 5mA to 1A VI = -21V to -33V IO = 5mA f = 10Hz to 100kHz TA = +25C f = 120Hz VI = 10V TJ = +25C IO = 1A TJ = +25C, VI = -35V TJ = +25C 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 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.
9
MC79XX/MC79XXA/LM79XX
Electrical Characteristics (MC7924) (Continued)
(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. -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 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.
10
MC79XX/MC79XXA/LM79XX
Electrical Characteristics (MC7905A) (Continued)
(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 TJ = +25C Line Regulation (Note1) VO VI = -7.5V to -25V VI = -8V to -12V , IO=1A TJ =+25C, 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 VI = -7V to -20V IO=1A VI = -8V to -12V IO=1A Conditions Min. Typ. Max. -4.9 - 4.8 54 -5.0 -5.0 5 2 7 7 10 3 3 0.05 0.1 - 0.4 40 60 2 300 2.2 -5.1 -5.2 50 25 50 50 100 50 6 0.5 0.8 mV mA mA mV/C V dB V mA A mV V Unit
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
MC79XX/MC79XXA/LM79XX
Electrical Characteristics (MC7912A) (Continued)
(VI = -19V, 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 VI = -14.5V to -27V Io = 1A VI = -16V to -22V Io = 1A Conditions Min. -11.75 -11.5 54 Typ. -12 -12 12 6 12 12 12 4 3 0.05 0.1 -0.8 200 60 2 300 2.2 Max. -12.25 -12.5 120 60 120 120 150 mV 75 6 0.5 1 mA mA mV/C V dB V mA A mV V Unit
Line Regulation (Note1)
TJ = +25C VO
VI = -14.8V to -30V VI = -16V to -22V, Io = 1A VO 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
Load Regulation (Note1)
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
MC79XX/MC79XXA/LM79XX
Electrical Characteristics (MC7915A) (Continued)
(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 VI = -17.5V to -30V Io = 1A VI = -20V to -26V Io = 1A Conditions Min. -14.7 -14.4 54 Typ. -15 -15 12 6 12 6 12 4 3 0.05 0.1 -0.9 250 60 2 300 2.2 Max. -15.3 -15.6 150 75 150 150 150 mV 75 6 0.5 1 mA mA mV/C V dB V mA A mV V Unit
TJ = +25C Line Regulation (Note1) VO
VI = -17.9V to -30V VI = -20V to -26V, Io = 1A VO 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
Load Regulation (Note1)
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.
13
MC79XX/MC79XXA/LM79XX
Typical Perfomance 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
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
MC79XX/MC79XXA/LM79XX
Typical Applications
+ 2.2F + 1F CO
CI - VI 2
1
Input
MC79XX 3 KA79XX LM79XX
Output
- VO
Figure 6. Negative Fixed output regulator
+ 15V + C1
1
MC7812 KA7812
2
3 + Co 1F 1F + Co 3
+12V
1N4001
0.33F
+ 2.2F
*
GND
1N4001
C1 - 15V 2
1 KA7912 MC7912
*
-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
MC79XX/MC79XXA/LM79XX
Mechanical Dimensions
Package Dimensions in millimeters
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
MC79XX/MC79XXA/LM79XX
Ordering Information
Product Number LM7905CT Product Number MC7905CT MC7906CT MC7908CT MC7909CT MC7910CT MC7912CT MC7915CT MC7918CT MC7924CT MC7905ACT MC7912ACT MC7915ACT 2% 4% TO-220 0 ~ +125C Output Voltage Tolerance 4% Output Voltage Tolerance Package TO-220 Package Operating Temperature 0 ~ +125C Operating Temperature
17
MC79XX/MC79XXA/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 11/12/02 0.0m 001 Stock#DSxxxxxxxx 2002 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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