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MC78L00A Series Three-Terminal Low Current Positive Voltage Regulators
The MC78L00A Series of positive voltage regulators are inexpensive, easytouse devices suitable for a multitude of applications that require a regulated supply of up to 100 mA. Like their higher powered MC7800 and MC78M00 Series cousins, these regulators feature internal current limiting and thermal shutdown making them remarkably rugged. No external components are required with the MC78L00 devices in many applications. These devices offer a substantial performance advantage over the traditional zener dioderesistor combination, as output impedance and quiescent current are substantially reduced. · Wide Range of Available, Fixed Output Voltages · Low Cost · Internal Short Circuit Current Limiting · Internal Thermal Overload Protection · No External Components Required · Complementary Negative Regulators Offered (MC79L00A Series)
Representative Schematic Diagram
Input Q12 Q1 Q10 3.8k Q4 Q6 5.0k 3.0 025k Output
8 1
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Pin: 1. Output 2. Ground 3. Input
2 3
TO92 P SUFFIX CASE 29
SOP8* D SUFFIX CASE 751
15k
Q3
Q5
Q11
*SOP8 is an internally modified SO8 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. SOP8 conforms to all external dimensions of the standard SO8 package.
PIN CONNECTIONS
VOUT 1 8 7 6 5 (Top View) Ground VIN GND GND NC
1.2k Q2
1.9k
19k C
2.2k Q9 Q8 2.85k
GND 2 GND 3 NC 4
Z1 420
Q7 1.0k
Standard Application
Input Cin* 0.33µF MC78LXXA Output CO**
DEVICE TYPE/NOMINAL VOLTAGE
5% Output Voltage Accuracy MC78L05AC MC78L08AC MC78L09AC MC78L12AC MC78L15AC MC78L18AC MC78L24AC Voltage 5.0 8.0 9.0 12 15 18 24
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 input ripple voltage. *Cin is required if regulator is located an *appreciable distance from power supply filter. **CO is not needed for stability; however, it does *improve transient response.
ORDERING INFORMATION
See detailed ordering and shipping information in the package dimensions section on page 7 of this data sheet.
© Semiconductor Components Industries, LLC, 1999
1
October, 1999 Rev. 0
Publication Order Number: MC78L00A/D
MC78L00A Series
MAXIMUM RATINGS (TA = +125°C, unless otherwise noted.)
Rating Input Voltage (2.6 V8.0 V) Input Voltage (12 V18 V) Input Voltage (24 V) Storage Temperature Range Operating Junction Temperature Range Symbol VI Value 30 35 40 65 to +150 0 to +150 Unit Vdc
Tstg TJ
°C °C
ELECTRICAL CHARACTERISTICS (VI = 10 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF, 40°C < TJ < +125°C (for MC78LXXAB),
0°C < TJ < +125°C (for MC78LXXAC), unless otherwise noted.) MC78L05AC, AB Characteristics Output Voltage (TJ = +25°C) Line Regulation (TJ = +25°C, IO = 40 mA) 7.0 Vdc VI 20 Vdc 8.0 Vdc VI 20 Vdc Load Regulation (TJ = +25°C, 1.0 mA IO 100 mA) (TJ = +25°C, 1.0 mA IO 40 mA) Output Voltage (7.0 Vdc VI 20 Vdc, 1.0 mA IO 40 mA) (VI = 10 V, 1.0 mA IO 70 mA) Input Bias Current (TJ = +25°C) (TJ = +125°C) Input Bias Current Change (8.0 Vdc VI 20 Vdc) (1.0 mA IO 40 mA) Output Noise Voltage (TA = +25°C, 10 Hz f 100 kHz) Ripple Rejection (IO = 40 mA, f = 120 Hz, 8.0 Vdc VI 18 V, TJ = +25°C) Dropout Voltage (TJ = +25°C) Symbol VO Regline Min 4.8 Typ 5.0 Max 5.2 Unit Vdc mV Regload VO 4.75 4.75 IIB IIB Vn RR VI VO 41 40 49 1.7 1.5 0.1 µV dB Vdc 3.8 6.0 5.5 mA 5.25 5.25 mA 11 5.0 60 30 Vdc 55 45 150 100 mV
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MC78L00A Series
ELECTRICAL CHARACTERISTICS (VI = 14 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF, 40°C < TJ < +125°C (for MC78LXXAB), 0°C < TJ < +125°C (for MC78LXXAC), unless otherwise noted.)
MC78L08AC, AB Characteristics Output Voltage (TJ = +25°C) Line Regulation (TJ = +25°C, IO = 40 mA) 10.5 Vdc VI 23 Vdc 11 Vdc VI 23 Vdc Load Regulation (TJ = +25°C, 1.0 mA IO 100 mA) (TJ = +25°C, 1.0 mA IO 40 mA) Output Voltage (10.5 Vdc VI 23 Vdc, 1.0 mA IO 40 mA) (VI = 14 V, 1.0 mA IO 70 mA) Input Bias Current (TJ = +25°C) (TJ = +125°C) Input Bias Current Change (11 Vdc VI 23 Vdc) (1.0 mA IO 40 mA) Symbol VO Regline Min 7.7 Typ 8.0 Max 8.3 Unit Vdc mV Regload VO 7.6 7.6 IIB IIB 1.5 0.1 3.0 6.0 5.5 mA 8.4 8.4 mA 15 8.0 80 40 Vdc 20 12 175 125 mV
Output Noise Voltage Vn 60 µV (TA = +25°C, 10 Hz f 100 kHz) Ripple Rejection (IO = 40 mA, RR 37 57 dB f = 120 Hz, 12 V VI 23 V, TJ = +25°C) Dropout Voltage (TJ = +25°C) VI VO 1.7 Vdc ELECTRICAL CHARACTERISTICS (VI = 15 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF, 40°C < TJ < +125°C (for MC78LXXAB), 0°C < TJ < +125°C (for MC78LXXAC), unless otherwise noted.) MC78L09AC, AB Characteristics Output Voltage (TJ = +25°C) Line Regulation (TJ = +25°C, IO = 40 mA) 11.5 Vdc VI 24 Vdc 12 Vdc VI 24 Vdc Load Regulation (TJ = +25°C, 1.0 mA IO 100 mA) (TJ = +25°C, 1.0 mA IO 40 mA) Output Voltage (11.5 Vdc VI 24 Vdc, 1.0 mA IO 40 mA) (VI = 15 V, 1.0 mA IO 70 mA) Input Bias Current (TJ = +25°C) (TJ = +125°C) Input Bias Current Change (11 Vdc VI 23 Vdc) (1.0 mA IO 40 mA) Output Noise Voltage (TA = +25°C, 10 Hz f 100 kHz) Ripple Rejection (IO = 40 mA, f = 120 Hz, 13 V VI 24 V, TJ = +25°C) Dropout Voltage (TJ = +25°C) Symbol VO Regline Regload VO 8.5 8.5 IIB IIB Vn RR VI VO 37 60 57 1.7 1.5 0.1 µV dB Vdc 3.0 6.0 5.5 mA 9.5 9.5 mA 15 8.0 90 40 Vdc 20 12 175 125 mV Min 8.6 Typ 9.0 Max 9.4 Unit Vdc mV
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MC78L00A Series
ELECTRICAL CHARACTERISTICS (VI = 19 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF, 40°C < TJ < +125°C (for MC78LXXAB), 0°C < TJ < +125°C (for MC78LXXAC), unless otherwise noted.)
MC78L12AC, AB Characteristics Output Voltage (TJ = +25°C) Line Regulation (TJ = +25°C, IO = 40 mA) 14.5 Vdc VI 27 Vdc 16 Vdc VI 27 Vdc Load Regulation (TJ = +25°C, 1.0 mA IO 100 mA) (TJ = +25°C, 1.0 mA IO 40 mA) Output Voltage (14.5 Vdc VI 27 Vdc, 1.0 mA IO 40 mA) (VI = 19 V, 1.0 mA IO 70 mA) Input Bias Current (TJ = +25°C) (TJ = +125°C) Input Bias Current Change (16 Vdc VI 27 Vdc) (1.0 mA IO 40 mA) Output Noise Voltage (TA = +25°C, 10 Hz f 100 kHz) Ripple Rejection (IO = 40 mA, f = 120 Hz, 15 V VI 25 V, TJ = +25°C) Dropout Voltage (TJ = +25°C) Symbol VO Regline Regload VO 11.4 11.4 IIB IIB Vn RR VI VO 37 80 42 1.7 1.5 0.1 µV dB Vdc 4.2 6.5 6.0 mA 12.6 12.6 mA 20 10 100 50 Vdc 120 100 250 200 mV Min 11.5 Typ 12 Max 12.5 Unit Vdc mV
ELECTRICAL CHARACTERISTICS (VI = 23 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF, 40°C < TJ < +125°C (for MC78LXXAB), S 0°C < TJ < +125°C (for MC78LXXAC), unless otherwise noted.)
MC78L15AC, AB Characteristics Output Voltage (TJ = +25°C) Line Regulation (TJ = +25°C, IO = 40 mA) 17.5 Vdc VI 30 Vdc 20 Vdc VI 30 Vdc Load Regulation (TJ = +25°C, 1.0 mA IO 100 mA) (TJ = +25°C, 1.0 mA IO 40 mA) Output Voltage (17.5 Vdc VI 30 Vdc, 1.0 mA IO 40 mA) (VI = 23 V, 1.0 mA IO 70 mA) Input Bias Current (TJ = +25°C) (TJ = +125°C) Input Bias Current Change (20 Vdc VI 30 Vdc) (1.0 mA IO 40 mA) Output Noise Voltage (TA = +25°C, 10 Hz f 100 kHz) Ripple Rejection (IO = 40 mA, f = 120 Hz, 18.5 V VI 28.5 V, TJ = +25°C) Dropout Voltage (TJ = +25°C) Symbol VO Regline Min 14.4 Typ 15 Max 15.6 Unit Vdc mV Regload VO 14.25 14.25 IIB IIB Vn RR VI VO 34 90 39 1.7 1.5 0.1 µV dB Vdc 4.4 6.5 6.0 mA 15.75 15.75 mA 25 12 150 75 Vdc 130 110 300 250 mV
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MC78L00A Series
ELECTRICAL CHARACTERISTICS (VI = 27 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF, 0°C < TJ < +125°C, unless otherwise noted.)
MC78L18AC Characteristics Output Voltage (TJ = +25°C) Line Regulation (TJ = +25°C, IO = 40 mA) 21.4 Vdc VI 33 Vdc 20.7 Vdc VI 33 Vdc 22 Vdc VI 33 Vdc 21 Vdc VI 33 Vdc Load Regulation (TJ = +25°C, 1.0 mA IO 100 mA) (TJ = +25°C, 1.0 mA IO 40 mA) Output Voltage (21.4 Vdc VI 33 Vdc, 1.0 mA IO 40 mA) (20.7 Vdc VI 33 Vdc, 1.0 mA IO 40 mA) (VI = 27 V, 1.0 mA IO 70 mA) (VI = 27 V, 1.0 mA IO 70 mA) Input Bias Current (TJ = +25°C) (TJ = +125°C) Input Bias Current Change (22 Vdc VI 33 Vdc) (21 Vdc VI 33 Vdc) (1.0 mA IO 40 mA) Output Noise Voltage (TA = +25°C, 10 Hz f 100 kHz) Ripple Rejection (IO = 40 mA, f = 120 Hz, 23 V VI 33 V, TJ = +25°C) Dropout Voltage (TJ = +25°C) Symbol VO Min 17.3 Typ 18 Max 18.7 Unit Vdc
Regline
45 35 30 15
325 275
mV
Regload VO 17.1 17.1 IIB IIB Vn RR VI VO 33 150 48 1.7 1.5 0.1 3.1 6.5 6.0 18.9 18.9 170 85
mV
Vdc
mA
mA
µV dB Vdc
ELECTRICAL CHARACTERISTICS (VI = 33 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF, 0°C < TJ < +125°C, unless otherwise noted.)
MC78L24AC Characteristics Output Voltage (TJ = +25°C) Line Regulation (TJ = +25°C, IO = 40 mA) 27.5 Vdc VI 38 Vdc 28 Vdc VI 80 Vdc 27 Vdc VI 38 Vdc Load Regulation (TJ = +25°C, 1.0 mA IO 100 mA) (TJ = +25°C, 1.0 mA IO 40 mA) Output Voltage (28 Vdc VI 38 Vdc, 1.0 mA IO 40 mA) (27 Vdc VI 38 Vdc, 1.0 mA IO 40 mA) (28 Vdc VI = 33 Vdc, 1.0 mA IO 70 mA) (27 Vdc VI 33 Vdc, 1.0 mA IO 70 mA) Input Bias Current (TJ = +25°C) (TJ = +125°C) Input Bias Current Change (28 Vdc VI 38 Vdc) (1.0 mA IO 40 mA) Output Noise Voltage (TA = +25°C, 10 Hz f 100 kHz) Ripple Rejection (IO = 40 mA, f = 120 Hz, 29 V VI 35 V, TJ = +25°C) Dropout Voltage (TJ = +25°C) Symbol VO Regline Min 23 Typ 24 Max 25 Unit Vdc mV Regload VO 22.8 22.8 IIB IIB Vn RR VI VO 31 200 45 1.7 1.5 0.1 µV dB Vdc 3.1 6.5 6.0 mA 25.2 25.2 mA 40 20 200 100 Vdc 50 60 300 350 mV
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MC78L00A Series
Figure 2. Dropout Voltage versus Junction Temperature
2.5 2.0 1.5 1.0 0.5 0 0 25 50 75 100 TJ, JUNCTION TEMPERATURE (°C) 125 IO = 40 mA IO = 1.0 mA Dropout of Regulation is defined as when VO = 2% of VO IO = 70 mA
8.0 VO , OUTPUT VOLTAGE (V) MC78L05AC Vout = 5.0 V TJ = 25°C IO = 1.0 mA
6.0
4.0
IO = 40 mA 2.0
IO = 100 mA
0
0
2.0
4.0 6.0 VI, INPUT VOLTAGE (V)
8.0
10
Figure 3. 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 25 50 75 100 TA, AMBIENT TEMPERATURE (°C) 125 MC78L05AC VI = 10 V VO= 5.0 V IO = 40 mA I IB , INPUT BIAS CURRENT (mA) 5.0 4.0 3.0 2.0 1.0 0 0 5.0
V I V O , INPUT/OUTPUT DIFFERENTIAL VOLTAGE (V)
Figure 1. Dropout Characteristics
Figure 4. Input Bias Current versus Input Voltage
MC78L05AC Vout = 5.0 V IO = 40 mA TJ = 25°C
10
15 20 25 VI, INPUT VOLTAGE (V)
30
35
40
Figure 5. Maximum Average Power Dissipation versus Ambient Temperature TO92 Type Package
10,000 PD, POWER DISSIPATION (mW) R JA, THERMAL RESISTANCE JUNCTION-TO-AIR (°C/W)
Figure 6. SOP8 Thermal Resistance and Maximum Power Dissipation versus P.C.B. Copper Length
PD, MAXIMUM POWER DISSIPATION (W) 170 150 130 110 90 70 50 30 RJA 0 10 Graph represents symmetrical layout PD(max) for TA = 50°C 3.2 2.8 2.4 2.0 1.6 1.2 0.8 0.4 50
No Heatsink
1000
100 RJA = 200°C/W PD(max) to 25°C = 625 mW 10 25 50 75 100 125 150
20
TA, AMBIENT TEMPERATURE (°C)
L, LENGTH OF COPPER (mm)
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ÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎ ÎÎÎÎ
L 2.0 oz. Copper L 30 40
3.0 mm
MC78L00A Series
APPLICATIONS INFORMATION
Design Considerations
The MC78L00A Series of fixed voltage regulators are designed with Thermal Overload Protection that shuts down the circuit when subjected to an excessive power overload condition. Internal Short Circuit Protection 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 lengths, or if the output load capacitance is large. The
Figure 7. Current Regulator
input bypass capacitor should be selected to provide good highfrequency characteristics to insure stable operation under all load conditions. A 0.33 µF 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 regulators input terminals. 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 8. ± 15 V Tracking Voltage Regulator
+20V MC78L15A 2 MC1741 3 + 4 MPS A70 VO 7 +VO 10k
Input 0.33µF
MC78L05A R Constant Current to Grounded Load
0.33µF 6
IO
10k
0.33µF The MC78L00 regulators can also be used as a current source when connected as above. In order to minimize dissipation the MC78L05C is chosen in this application. Resistor R determines the current as follows: 5.0 V IO = + IB R IIB = 3.8 mA over line and load changes For example, a 100 mA current source would require R to be a 50 , 1/2 W resistor and the output voltage compliance would be the input voltage less 7 V. 6.5 20V MPS U55
Figure 9. Positive and Negative Regulator
+VI 0.33µF VI 0.33µF MC79LXXA 0.1µF VO MC78LXXA 0.1µF +VO
ORDERING INFORMATION
Device MC78LXXACD* MC78LXXACDR2* MC78LXXACP MC78LXXACPRA / MC78LXXACPRE MC78LXXACPRM / MC78LXXACPRP MC78LXXABD* MC78LXXABDR2* MC78LXXABP* MC78LXXABPRA / MC78LXXABPRE MC78LXXABPRM / MC78LXXABPRP
XX indicates nominal voltage *Available in 5, 8, 9, 12 and 15 V devices.
Operating Temperature Range
Package SOP8 SOP8 / Tape & Reel
Shipping 98 Units / Rail 2500 Units / Tape & Reel 2000 Units / Bag 2000 Units / Tape & Reel 2000 Units / Ammo Pack 98 Units / Rail 2500 Units / Tape & Reel 2000 Units / Bag 2000 Units / Tape & Reel 2000 Units / Ammo Pack
TJ = 0° to +125°C
TO92 TO92 / Tape & Reel TO92 / Ammo Pack SOP8 SOP8 / Tape & Reel
TJ = 40° to +125°C
TO92 TO92 / Tape & Reel TO92 / Ammo Pack
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MC78L00A Series
PACKAGE DIMENSIONS
A R P
SEATING PLANE
B
P SUFFIX PLASTIC PACKAGE CASE 2904 ISSUE AD
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
X X G H V
1
D J C SECTION XX N N (SOP8) D SUFFIX PLASTIC PACKAGE CASE 75105 ISSUE R
A
8
D
5
C
E
1 4
H
0.25
M
B
M
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_
h B C e A
SEATING PLANE
X 45 _
q
L 0.10 A1 0.25 B
M
q
C B
S
A
S
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.
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MC78L00A/D