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MC79L00, A Series Three-Terminal Low Current 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
THREE-TERMINAL LOW CURRENT NEGATIVE FIXED VOLTAGE REGULATORS
SEMICONDUCTOR TECHNICAL DATA
* * * * *
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
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 R 5 R18 R6 R8 Q10 Q5 Q4 R7 Q8 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 Motorola sales * office for information. Q14 Q9 R4 Q12 Q13 R16 Output R9 R17
* 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.
R1
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) Motorola, Inc. 1996
Rev 2
MOTOROLA ANALOG IC DEVICE DATA
1
MC79L00, A 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 Min -11.1 Typ -12 Max -12.9 MC79L12AC, AB Min -11.5 Typ -12 Max -12.5 Unit Vdc mV - - 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 Symbol VO Regline Min -4.6 Typ -5.0 Max -5.4 MC79L05AC, AB Min -4.8 Typ -5.0 Max -5.2 Unit Vdc mV - - 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 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),
2
MOTOROLA ANALOG IC DEVICE DATA
MC79L00, A 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
MOTOROLA ANALOG IC DEVICE DATA
3
MC79L00, A 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.
Figure 1. Positive and Negative Regulator
Input +Vin 0.33F MC78LXX 0.1F +VO
Figure 2. Standard Application
MC79LXX CO** 0.1F Output
CI* 0.33F
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.
4
MOTOROLA ANALOG IC DEVICE DATA
MC79L00, A Series
TYPICAL CHARACTERISTICS
(TA = +25C, unless otherwise noted.) Figure 4. Dropout Voltage versus Junction Temperature
V I -V O , INPUT/OUTPUT DIFFERENTIAL VOLTAGE (V) -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
Figure 3. Dropout Characteristics
8.0 VO , OUTPUT VOLTAGE (V) MC79L05C VO = -5.0 V TJ = 25C IO = 1.0 mA IO = 100 mA
6.0
IO = 70 mA IO = 40 mA
4.0
2.0 IO = 40 mA 0
0
-2.0
-4.0 -6.0 Vin, INPUT VOLTAGE (V)
-0.8
-10
0
25
50 75 100 TJ, JUNCTION TEMPERATURE (C)
125
Figure 5. Input Bias Current versus Ambient 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
Figure 6. Input Bias Current versus Input Voltage
MC79L05C VO = -5.0 V IO = 40 mA
0
-5.0
-10
-15 -20 -25 -30 Vin, INPUT VOLTAGE (V)
-35
-40
Figure 7. Maximum Average Power Dissipation versus Ambient Temperature (TO-92)
10,000 RJA , THERMAL RESISTANCE JUNCTION-TO-AIR (C/W)
Figure 8. SOP-8 Thermal Resistance and Maximum Power Dissipation versus P.C.B. Copper Length
170 150 130 110 90 70 50 30 RJA 0 10 PD(max) for TA = +50C 3.2 2.8 2.4 PD, MAXIMUM POWER DISSIPATION (W)
P D , POWER DISSIPATION (mW)
1,000
No Heatsink
L
100 RJA = 200C/W PD(max) to 25C = 625 mW 10 25 50 75 100 125 TA, AMBIENT TEMPERATURE (C) 150
20 30 L, LENGTH OF COPPER (mm)
MOTOROLA ANALOG IC DEVICE DATA
III III III I IIIIIII I III
2.0 oz. Copper L 3.0 mm 40
Graph represents symmetrical layout
2.0 1.6 1.2 0.8
0.4 50
5
MC79L00, A Series
OUTLINE DIMENSIONS
P SUFFIX PLASTIC PACKAGE CASE 29-04 ISSUE AD
A R P
SEATING PLANE
B
F
L K
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. CONTOUR OF PACKAGE BEYOND DIMENSION R IS UNCONTROLLED. 4. DIMENSION F APPLIES BETWEEN P AND L. DIMENSION D AND J APPLY BETWEEN L AND K MINIMUM. LEAD DIMENSION IS UNCONTROLLED IN P AND BEYOND DIMENSION K MINIMUM. DIM A B C D F G H J K L N P R V INCHES MIN MAX 0.175 0.205 0.170 0.210 0.125 0.165 0.016 0.022 0.016 0.019 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 0.41 0.55 0.41 0.48 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 ---
XX G H V
1
D J C SECTION X-X N N D SUFFIX PLASTIC PACKAGE CASE 751-05 (SOP-8) ISSUE R
A
8
D
5
C
E
1 4
H
0.25
M
B
M
h B C e A
SEATING PLANE
X 45 _
NOTES: 1. DIMENSIONING AND TOLERANCING PER ASME Y14.5M, 1994. 2. DIMENSIONS ARE IN MILLIMETERS. 3. DIMENSION D AND E DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE. 5. DIMENSION B DOES NOT INCLUDE MOLD PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.127 TOTAL IN EXCESS OF THE B DIMENSION AT MAXIMUM MATERIAL CONDITION. DIM A A1 B C D E e H h L MILLIMETERS MIN MAX 1.35 1.75 0.10 0.25 0.35 0.49 0.18 0.25 4.80 5.00 3.80 4.00 1.27 BSC 5.80 6.20 0.25 0.50 0.40 1.25 0_ 7_
q
L 0.10 A1 0.25 B
M
CB
S
A
S
q
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6
*MC79L00/D*
MOTOROLA ANALOG IC DEVICE DATA MC79L00/D

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