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ON Semiconductort
100 mA Negative Voltage Regulators
The MC79L00, A Series negative voltage regulators are inexpensive, easy-to-use devices suitable for numerous applications requiring up to100 mA. Like the higher powered MC7900 Series negative regulators, this series features thermal shutdown and current limiting, making them remarkably rugged. In most applications, no external components are required for operation. The MC79L00 devices are useful for on-card regulation or any other application where a regulated negative voltage at a modest current level is needed. These regulators offer substantial advantage over the common resistor/zener diode approach. * No External Components Required * Internal Short Circuit Current Limiting * Internal Thermal Overload Protection * Low Cost * Complementary Positive Regulators Offered (MC78L00 Series) * Available in Either 5% (AC) or 10% (C) Selections
MC79L00, MC79L00A Series
THREE-TERMINAL LOW CURRENT NEGATIVE FIXED VOLTAGE REGULATORS
SEMICONDUCTOR TECHNICAL DATA
P SUFFIX PLASTIC PACKAGE CASE 29 Pin 1. Ground 2. Input 3. Output
1
2
3
8 1
D SUFFIX PLASTIC PACKAGE CASE 751 (SOP-8)* Vout Vin Vin NC 5. 6. 7. 8. GND Vin Vin NC
Pin 1. 2. 3. 4.
Representative Schematic Diagram
Gnd Q10 Q5 Q4 R7 Q8 Q14 Q9 Q1 R2 Z1 R3 C Q6 R10 R11 Q7 Q2 Q11 R14 R15 Input * Automotive temperature range selections are available with special test conditions and additional tests in 5, 12 and 15 V devices. Contact your local ON Semiconductor sales office for information. R4 Q12 R16 Output Q13 R9 R17
R1
R 5 R18
R6
R8
*SOP-8 is an internally modified SO-8 package. Pins 2, 3, 6, and 7 are electrically common to the die attach flag. This internal lead frame modification decreases package thermal resistance and increases power dissipation capability when appropriately mounted on a printed circuit board. SOP-8 conforms to all external dimensions of the standard SO-8 package.
Device No. 10% MC79L05C MC79L12C MC79L15C MC79L18C MC79L24C
Device No. 5% MC79L05AC MC79L12AC MC79L15AC MC79L18AC MC79L24AC
Nominal Voltage -5.0 -12 -15 -18 -24
ORDERING INFORMATION
Device MC79LXXACD* MC79LXXACP MC79LXXCP MC79LXXABD* MC79LXXABP* TJ = -40 to +125C TJ = 0 to +125C Operating Temperature Range Package SOP-8 Plastic Power Plastic Power SOP-8 Plastic Power
XX indicates nominal voltage
(c) Semiconductor Components Industries, LLC, 2002
1
January, 2002 - Rev. 4
Publication Order Number: MC79L00/D
MC79L00, MC79L00A Series
MAXIMUM RATINGS (TA = +25C, unless otherwise noted.)
Rating Input Voltage (-5 V) Input Voltage (-12, -15, -18 V) Input Voltage (-24 V) Storage Temperature Range Junction Temperature 0C < TJ < +125C (for MC79LXXAC)). MC79L05C, AB Characteristics Output Voltage (TJ = +25C) Input Regulation (TJ = +25C) -7.0 Vdc VI -20 Vdc -8.0 Vdc VI -20 Vdc Load Regulation TJ = +25C, 1.0 mA IO 100 mA 1.0 mA IO 40 mA Output Voltage -7.0 Vdc VI -20 Vdc, 1.0 mA IO 40 mA VI = -10 Vdc, 1.0 mA IO 70 mA Input Bias Current (TJ = +25C) (TJ = +125C) Input Bias Current Change -8.0 Vdc VI -20 Vdc 1.0 mA IO 40 mA Output Noise Voltage (TA = +25C, 10 Hz f 100 kHz) Ripple Rejection (-8.0 VI -18 Vdc, f = 120 Hz, TJ = +25C) Dropout Voltage (IO = 40 mA, TJ = +25C) 0C < TJ < +125C (for MC79LXXAB)). MC79L12C, AB Characteristics Output Voltage (TJ = +25C) Input Regulation (TJ = +25C) -14.5 Vdc VI -27 Vdc -16 Vdc VI -27 Vdc Load Regulation TJ = +25C, 1.0 mA IO 100 mA 1.0 mA IO 40 mA Output Voltage -14.5 Vdc VI -27 Vdc, 1.0 mA IO 40 mA VI = -19 Vdc, 1.0 mA IO 70 mA Input Bias Current (TJ = +25C) (TJ = +125C) Input Bias Current Change -16 Vdc VI -27 Vdc 1.0 mA IO 40 mA Output Noise Voltage (TA = +25C, 10 Hz f 100 kHz) Ripple Rejection (-15 VI -25 Vdc, f = 120 Hz, TJ = +25C) Dropout Voltage (IO = 40 mA, TJ = +25C) Symbol VO Regline - - Regload - - VO -10.8 -10.8 IIB - - IIB - - Vn RR |VI-VO| - 36 - - - 80 42 1.7 1.5 0.2 - - - - - - 37 - - - 80 42 1.7 1.5 0.2 - - - V dB Vdc - - 6.5 6.0 - - - - 6.5 6.0 mA - - -13.2 -13.2 -11.4 -11.4 - - -12.6 -12.6 mA - - 100 50 - - - - 100 50 Vdc - - 250 200 - - - - 250 200 mV Min -11.1 Typ -12 Max -12.9 MC79L12AC, AB Min -11.5 Typ -12 Max -12.5 Unit Vdc mV Symbol VO Regline - - Regload - - VO -4.5 -4.5 IIB - - IIB - - Vn RR |VI-VO| - 40 - - - 40 49 1.7 1.5 0.2 - - - - - - 41 - - - 40 49 1.7 1.5 0.1 - - - V dB Vdc - - 6.0 5.5 - - - - 6.0 5.5 mA - - -5.5 -5.5 -4.75 -4.75 - - -5.25 -5.25 mA - - 60 30 - - - - 60 30 Vdc - - 200 150 - - - - 150 100 mV Min -4.6 Typ -5.0 Max -5.4 MC79L05AC, AB Min -4.8 Typ -5.0 Max -5.2 Unit Vdc mV Symbol VI Value -30 -35 -40 -65 to +150 +150 Unit Vdc
Tstg TJ
C C
ELECTRICAL CHARACTERISTICS (VI = -10 V, IO = 40 mA, CI = 0.33 F, CO = 0.1 F, -40C < TJ +125C (for MC79LXXAB),
ELECTRICAL CHARACTERISTICS (VI = -19 V, IO = 40 mA, CI = 0.33 F, CO = 0.1 F, -40C < TJ +125C (for MC79LXXAC),
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MC79L00, MC79L00A Series
ELECTRICAL CHARACTERISTICS (VI = -23 V, IO = 40 mA, CI = 0.33 F, CO = 0.1 F, -40C < TJ +125C (for MC79LXXAB),
0C < TJ < +125C (for MC79LXXAC)). MC79L15C Characteristics Output Voltage (TJ = +25C) Input Regulation (TJ = +25C) -17.5 Vdc VI -30 Vdc -20 Vdc VI -30 Vdc Load Regulation TJ = +25C, 1.0 mA IO 100 mA 1.0 mA IO 40 mA Output Voltage -17.5 Vdc VI -Vdc, 1.0 mA IO 40 mA VI = -23 Vdc, 1.0 mA IO 70 mA Input Bias Current (TJ = +25C) (TJ = +125C) Input Bias Current Change -20 Vdc VI -30 Vdc 1.0 mA IO 40 mA Output Noise Voltage (TA = +25C, 10 Hz f 100 kHz) Ripple Rejection (-18.5 VI -28.5 Vdc, f = 120 Hz) Dropout Voltage IO = 40 mA, TJ = +25C Symbol VO Regline - - Regload - - VO -13.5 -13.5 IIB - - IIB - - VN RR |VI-VO| - 33 - - - 90 39 1.7 1.5 0.2 - - - - - - 34 - - - 90 39 1.7 1.5 0.1 - - - V dB Vdc - - 6.5 6.0 - - - - 6.5 6.0 mA - - -16.5 -16.5 -14.25 -14.25 - - -15.75 -15.75 mA - - 150 75 - - - - 150 75 Vdc - - 300 250 - - - - 300 250 mV Min -13.8 Typ -15 Max -16.2 MC79L15AC, AB Min -14.4 Typ -15 Max -15.6 Unit Vdc mV
ELECTRICAL CHARACTERISTICS (VI = -27 V, IO = 40 mA, CI = 0.33 F, CO = 0.1 F, 0C < TJ > +125C, unless otherwise noted).
MC79L18C Characteristics Output Voltage (TJ = +25C) Input Regulation (TJ = +25C) -20.7 Vdc VI -33 Vdc -21.4 Vdc VI -33 Vdc -22 Vdc VI -33 Vdc -21 Vdc VI -33 Vdc Load Regulation TJ = +25C, 1.0 mA IO 100 mA 1.0 mA IO 40 mA Output Voltage -20.7 Vdc VI -33 Vdc, 1.0 mA IO 40 mA -21.4 Vdc VI -33 Vdc, 1.0 mA IO 40 mA VI = -27 Vdc, 1.0 mA IO 70 mA Input Bias Current (TJ = +25C) (TJ = +125C) Input Bias Current Change -21 Vdc VI -33 Vdc -27 Vdc VI -33 Vdc 1.0 mA IO 40 mA Output Noise Voltage (TA = +25C, 10 Hz f 100 kHz) Ripple Rejection (-23 VI -33 Vdc, f = 120 Hz, TJ = +25C) Dropout Voltage IO = 40 mA, TJ = +25C Symbol VO Regline - - - - Regload - - VO - -16.2 -16.2 IIB - - IIB - - - Vn RR |VI-VO| - 32 - - - - 150 46 1.7 - 1.5 0.2 - - - - - - - 33 - - - - 150 48 1.7 1.5 - 0.1 - - - V dB Vdc - - 6.5 6.0 - - - - 6.5 6.0 mA - - - - -19.8 -19.8 -17.1 - -17.1 - - - -18.9 - -18.9 mA - - 170 85 - - - - 170 85 Vdc - - - - - 325 275 - - - - - - - - - 325 - - 275 mV Min -16.6 Typ -18 Max -19.4 Min -17.3 MC79L18AC Typ -18 Max -18.7 Unit Vdc mV
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MC79L00, MC79L00A Series
ELECTRICAL CHARACTERISTICS (VI = -33 V, IO = 40 mA, CI = 0.33 F, CO = 0.1 F, 0C < TJ < +125C, unless otherwise noted).
MC79L24C Characteristics Output Voltage (TJ = +25C) Input Regulation (TJ = +25C) -27 Vdc VI -38 Vdc -27.5 Vdc VI -38 Vdc -28 Vdc VI -38 Vdc Load Regulation TJ = +25C, 1.0 mA IO 100 mA 1.0 mA IO 40 mA Output Voltage -27 Vdc VI -38 V, 1.0 mA IO 40 mA -28 Vdc VI -38 Vdc, 1.0 mA IO 40 mA VI = -33 Vdc, 1.0 mA IO 70 mA Input Bias Current (TJ = +25C) (TJ = +125C) Input Bias Current Change -28 Vdc VI -38 Vdc 1.0 mA IO 40 mA Output Noise Voltage (TA = +25C, 10 Hz f 100 kHz) Ripple Rejection (-29 VI -35 Vdc, f = 120 Hz, TJ = +25C) Dropout Voltage IO = 40 mA, TJ = +25C Symbol VO Regline - - - Regload - - VO - -21.4 -21.4 IIB - - IIB - - Vn RR |VI-VO| - 30 - - - 200 43 1.7 1.5 0.2 - - - - - - 31 - - - 200 47 1.7 1.5 0.1 - - - V dB Vdc - - 6.5 6.0 - - - - 6.5 6.0 mA - - - - -26.4 -26.4 -22.8 - -22.8 - - - -25.2 - -25.2 mA - - 200 100 - - - - 200 100 Vdc - - - - 350 300 - - - - - - 350 - 300 mV Min -22.1 Typ -24 Max -25.9 Min -23 MC79L24AC Typ -24 Max -25 Unit Vdc mV
APPLICATIONS INFORMATION
Design Considerations
The MC79L00, A Series of fixed voltage regulators are designed with Thermal Overload Protections that shuts down the circuit when subjected to an excessive power overload condition, Internal Short Circuit Protection that limits the maximum current the circuit will pass. In many low current applications, compensation capacitors are not required. However, it is recommended that the regulator input be bypassed with a capacitor if the regulator is connected to the power supply filter with long wire length, or if the output load capacitance is large. An input bypass capacitor should be selected to provide good
high-frequency characteristics to insure stable operation under all load conditions. A 0.33 F or larger tantalum, mylar, or other capacitor having low internal impedance at high frequencies should be chosen. The bypass capacitor should be mounted with the shortest possible leads directly across the regulator's input terminals. Normally good construction techniques should be used to minimize ground loops and lead resistance drops since the regulator has no external sense lead. Bypassing the output is also recommended.
+Vin 0.33F
MC78LXX 0.1F
+VO
Input CI* 0.33F
MC79LXX CO** 0.1F
Output
0.1F -Vin 0.33F MC79LXX -VO A common ground is required between the input and the output voltages. The input voltage must remain typically 2.0 V above the output voltage even during the low point on the ripple voltage. * CI is required if regulator is located an appreciable * distance from the power supply filter ** CO improves stability and transient response.
Figure 1. Positive and Negative Regulator http://onsemi.com
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Figure 2. Standard Application
MC79L00, MC79L00A Series
TYPICAL CHARACTERISTICS
(TA = +25C, unless otherwise noted.)
V I -V O , INPUT/OUTPUT DIFFERENTIAL VOLTAGE (V) 8.0 VO, OUTPUT VOLTAGE (V) MC79L05C VO = -5.0 V TJ = 25C IO = 1.0 mA IO = 100 mA -2.5 -2.0 -1.5 IO = 1.0 mA -1.0 -0.5 0 Dropout of Regulation is defined when VO = 2% of VO 0 25 50 75 100 TJ, JUNCTION TEMPERATURE (C) 125 IO = 70 mA IO = 40 mA
6.0
4.0
2.0
IO = 40 mA
0
0
-2.0
-4.0 -6.0 Vin, INPUT VOLTAGE (V)
-0.8
-10
Figure 3. Dropout Characteristics
Figure 4. Dropout Voltage versus Junction Temperature
4.2 I IB , INPUT BIAS CURRENT (mA) 4.0 3.8 3.6 3.4 3.2 3.0 0 0 MC79L05C Vin = -10 V VO = -5.0 V IO = 40 mA 25 50 75 100 TA, AMBIENT TEMPERATURE (C) 125 I IB , INPUT BIAS CURRENT (mA)
5.0 4.0 3.0 2.0 1.0 0
MC79L05C VO = -5.0 V IO = 40 mA
0
-5.0
-10
-15 -20 -25 -30 Vin, INPUT VOLTAGE (V)
-35
-40
Figure 5. Input Bias Current versus Ambient Temperature
Figure 6. Input Bias Current versus Input Voltage
RJA , THERMAL RESISTANCE JUNCTION-TO-AIR (C/W)
150 130 110 90 70 50 30 0 10 RJA
P D , POWER DISSIPATION (mW)
PD(max) for TA = +50C
2.8 2.4
1,000
No Heatsink
Graph represents symmetrical layout
2.0 1.6 1.2 0.8 0.4 50
100 RJA = 200C/W PD(max) to 25C = 625 mW 25 50 75 100 125 TA, AMBIENT TEMPERATURE (C) 150
L
2.0 oz. Copper L
3.0 mm
10
20 30 L, LENGTH OF COPPER (mm)
40
Figure 7. Maximum Average Power Dissipation versus Ambient Temperature (TO-92)
Figure 8. SOP-8 Thermal Resistance and Maximum Power Dissipation versus P.C.B. Copper Length
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PD, MAXIMUM POWER DISSIPATION (W)
10,000
170
3.2
III I II IIIIIII IIIII
MC79L00, MC79L00A Series
PACKAGE DIMENSIONS
P SUFFIX PLASTIC PACKAGE CASE 29-11 ISSUE AL
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. CONTOUR OF PACKAGE BEYOND DIMENSION R IS UNCONTROLLED. 4. LEAD DIMENSION IS UNCONTROLLED IN P AND BEYOND DIMENSION K MINIMUM. INCHES MIN MAX 0.175 0.205 0.170 0.210 0.125 0.165 0.016 0.021 0.045 0.055 0.095 0.105 0.015 0.020 0.500 --0.250 --0.080 0.105 --0.100 0.115 --0.135 --MILLIMETERS MIN MAX 4.45 5.20 4.32 5.33 3.18 4.19 0.407 0.533 1.15 1.39 2.42 2.66 0.39 0.50 12.70 --6.35 --2.04 2.66 --2.54 2.93 --3.43 ---
A R P L
SEATING PLANE
B
K
XX G H V
1
D J C SECTION X-X N N
DIM A B C D G H J K L N P R V
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MC79L00, MC79L00A Series
PACKAGE DIMENSIONS
D SUFFIX PLASTIC PACKAGE CASE 751-07 ISSUE W
-X- A
8 5
B
1 4
S
0.25 (0.010)
M
Y
M
-Y- G C -Z- H D 0.25 (0.010)
M SEATING PLANE
K
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSION A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE. 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.127 (0.005) TOTAL IN EXCESS OF THE D DIMENSION AT MAXIMUM MATERIAL CONDITION. DIM A B C D G H J K M N S MILLIMETERS MIN MAX 4.80 5.00 3.80 4.00 1.35 1.75 0.33 0.51 1.27 BSC 0.10 0.25 0.19 0.25 0.40 1.27 0_ 8_ 0.25 0.50 5.80 6.20 INCHES MIN MAX 0.189 0.197 0.150 0.157 0.053 0.069 0.013 0.020 0.050 BSC 0.004 0.010 0.007 0.010 0.016 0.050 0_ 8_ 0.010 0.020 0.228 0.244
N
X 45 _
0.10 (0.004)
M
J
ZY
S
X
S
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MC79L00, MC79L00A Series
ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. "Typical" parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer.
PUBLICATION ORDERING INFORMATION
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MC79L00/D

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