Document
Negative Voltage Regulators
100 mA
MC79L00A Series
The MC79L00A Series negative voltage regulators are inexpensive, easy−to−use devices suitable for numerous applications requiring up to 100 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 MC79L00A 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.
Features
• No External Components Required • Internal Short Circuit Current Limiting • Internal Thermal Overload Protection • Low Cost • Complementary Positive Regulators Offered (MC78L00 Series) • Pb−Free Packages are Available
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THREE−TERMINAL LOW CURRENT NEGATIVE FIXED
VOLTAGE REGULATORS
8
1 SOIC−8 D SUFFIX CASE 751
Pin 1. Vout 2. Vin 3. Vin 4. NC
5. GND
6. Vin 7. Vin 8. NC
MARKING DIAGRAMS
8 9Lxxx ALYWy G
1
R6 R
R8 Q10
5
Q5
R9
R18
R1
Q4
GND R17
R7
Q1 R4 R2 Z1 R3
Q8 Q14
Q9
R16
Output
Q12
Q13
C
Q2
Q6
Q7 Q11
R10 R11
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.
Figure 1. Representative Schematic Diagram
123 STRAIGHT LEAD
TO−92 P SUFFIX CASE 29−10
1 2 3 BENT LEAD
Pin 1. Ground 2. Input 3. Output
MC79L xxxxx ALYW
xxx = Specific Device Code
A
= Assembly Location
L
= Wafer Lot
Y
= Year
W
= Work Week
y
= B or C
ORDERING INFORMATION
See detailed ordering and shipping information in the package dimensions section on page 7 of this data sheet.
© Semiconductor Components Industries, LLC, 1994
1
April, 2021 − Rev. 11
Publication Order Number: MC79L00/D
MC79L00A Series
MAXIMUM RATINGS (TA = +25°C, unless otherwise noted.)
Rating
Input Voltage
(−5 V) (−12, −15, −18 V) (−24 V)
Symbol
Value
Unit
VI
−30
Vdc
−35
−40
Power Dissipation Case 29 (TO−92 Type) TA = 25°C Thermal Resistance, Junction−to−Ambient Thermal Resistance, Junction−to−Case
PD RqJA RqJC
Internally Limited 160 83
W °C/W °C/W
Case 751 (SOIC−8 Type) (Note 1) TA = 25°C Thermal Resistance, Junction−to−Ambient Thermal Resistance, Junction−to−Case
PD RqJA RqJC
Internally Limited 180 45
W °C/W °C/W
Storage Temperature Range
Tstg
−65 to +150
°C
Junction Temperature
TJ
+150
°C
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. 1. SOIC−8 Junction−to−Ambient Thermal Resistance is for minimum recommended pad size. Refer to Figure 9 for Thermal Resistance variation
versus pad size. *This device series contains ESD protection and exceeds the following tests:
Human Body Model 2000 V per MIL_STD_883, Method 3015 Machine Model Method 200 V.
ELECTRICAL CHARACTERISTICS (VI = −10 V, IO = 40 mA, CI = 0.33 mF, CO = 0.1 mF, −40°C < TJ +125°C (for MC79LXXAB), 0°C < TJ < +125°C (for MC79LXXAC)).
MC79L05AC, AB
Characteristics
Symbol
Min
Typ
Max
Unit
Output Voltage (TJ = +25°C)
VO
−4.8
−5.0
−5.2
Vdc
Input Regulation (TJ = +25°C) −7.0 Vdc ≥ VI ≥ −20 Vdc −8.0 Vdc ≥ VI ≥ −20 Vdc
Regline − −
mV
−
150
−
100
Load Regulation TJ = +25°C, 1.0 mA ≤ IO ≤ 100 mA 1.0 mA ≤ IO ≤ 40 mA
Regload − −
mV
−
60
−
30
Output Voltage −7.0 Vdc ≥ VI ≥ −20 Vdc, 1.0 mA ≤ IO ≤ 40 mA VI = −10 Vdc, 1.0 mA ≤ IO ≤ 70 mA
VO
Vdc
−4.75
−
−5.25
−4.75
−
−5.25
Input Bias Current (TJ = +25°C) (TJ = +125°C)
IIB − −
mA
−
6.0
−
5.5
Input Bias Current Change −8.0 Vdc ≥ VI ≥ −20 Vdc 1.0 mA ≤ IO ≤ 40 mA
IIB − −
mA
−
1.5
−
0.1
Output Noise Voltage (TA = +25°C, 10 Hz ≤ f ≤ 100 kHz)
Vn
−
40
−
mV
Ripple Rejection (−8.0 ≥ VI ≥ −18 Vdc, f = 120 Hz, TJ = +25°C)
RR
41
49
−
dB
Dropout Voltage (IO = 40 mA, TJ = +25°C)
|VI−VO|
−
1.7
−
Vdc
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product performance may not be indicated by the Electrical Characteristics if operated under different conditions.
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MC79L00A Series
ELECTRICAL CHARACTERISTICS (VI = −19 V, IO = 40 mA, CI = 0.33 mF, CO = 0.1 mF, −40°C < TJ +125°C (for MC79LXXAB), 0°C < TJ < +125°C (for MC79LXXAC)).
MC79L12AC, AB
Characteristics
Symbol
Min
Typ
Max
Unit
Output Voltage (TJ = +25°C)
VO
−11.5
−12
−12.5
Vdc
Input Regulation (TJ = +25°C) −14.5 Vdc ≥ VI ≥ −27 Vdc −16 Vdc ≥ VI ≥ −27.