MOTOROLA MC79L12CP Three-terminal low current negative fixed voltage regulator Datasheet

Order this document by MC79L00/D
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
THREE–TERMINAL LOW
CURRENT NEGATIVE FIXED
VOLTAGE REGULATORS
SEMICONDUCTOR
TECHNICAL DATA
P SUFFIX
PLASTIC PACKAGE
CASE 29
Pin 1. Ground
2. Input
3. Output
Low Cost
Complementary Positive Regulators Offered (MC78L00 Series)
1
2
3
Available in Either ±5% (AC) or ±10% (C) Selections
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SOP–8)*
8
1
Pin 1.
2.
3.
4.
Representative Schematic Diagram
Gnd
R
5
R18
R1
R8
R6
R9
R17
Q4
Q8
Q14
Q9
R16
R4
Output
GND
Vin
Vin
NC
* 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.
C
Q7
R10
R11
Device No.
5%
Nominal
Voltage
MC79L05C
MC79L12C
MC79L15C
MC79L18C
MC79L24C
MC79L05AC
MC79L12AC
MC79L15AC
MC79L18AC
MC79L24AC
–5.0
–12
–15
–18
–24
Q13
Q2
Q6
Device No.
±10%
ORDERING INFORMATION
Q12
R2
Z1
R3
5.
6.
7.
8.
Q10
Q5
R7
Q1
Vout
Vin
Vin
NC
Device
Q11
R14
Operating
Temperature Range
MC79LXXACD*
R15
MC79LXXACP
Input
SOP–8
TJ = 0° to +125°C
MC79LXXCP
MC79LXXABP*
SOP–8
TJ = –40° to +125°C
Plastic Power
XX indicates nominal voltage
 Motorola, Inc. 1996
MOTOROLA ANALOG IC DEVICE DATA
Plastic Power
Plastic Power
MC79LXXABD*
* 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.
Package
Rev 2
1
MC79L00, A Series
MAXIMUM RATINGS (TA = +25°C, unless otherwise noted.)
Rating
Input Voltage (–5 V)
Input Voltage (–12, –15, –18 V)
Input Voltage (–24 V)
Storage Temperature Range
Junction Temperature
Symbol
Value
Unit
VI
–30
–35
–40
Vdc
Tstg
TJ
–65 to +150
°C
+150
°C
ELECTRICAL CHARACTERISTICS (VI = –10 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF, –40°C < TJ +125°C (for MC79LXXAB),
0°C < TJ < +125°C (for MC79LXXAC)).
MC79L05C, AB
Characteristics
Output Voltage (TJ = +25°C)
Input Regulation
(TJ = +25°C)
–7.0 Vdc ≥ VI ≥ –20 Vdc
–8.0 Vdc ≥ VI ≥ –20 Vdc
Load Regulation
TJ = +25°C, 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 = +25°C)
(TJ = +125°C)
MC79L05AC, AB
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
VO
Regline
–4.6
–5.0
–5.4
–4.8
–5.0
–5.2
Vdc
mV
–
–
–
–
200
150
–
–
–
–
150
100
–
–
–
–
60
30
–
–
–
–
60
30
–4.5
–4.5
–
–
–5.5
–5.5
–4.75
–4.75
–
–
–5.25
–5.25
–
–
–
–
6.0
5.5
–
–
–
–
6.0
5.5
–
–
–
–
1.5
0.2
–
–
–
–
1.5
0.1
Regload
mV
VO
Vdc
IIB
mA
Input Bias Current Change
–8.0 Vdc ≥ VI ≥ –20 Vdc
1.0 mA ≤ IO ≤ 40 mA
IIB
Output Noise Voltage
(TA = +25°C, 10 Hz ≤ f ≤ 100 kHz)
Vn
–
40
–
–
40
–
µV
Ripple Rejection
(–8.0 ≥ VI ≥ –18 Vdc, f = 120 Hz, TJ = +25°C)
RR
40
49
–
41
49
–
dB
|VI–VO|
–
1.7
–
–
1.7
–
Vdc
Dropout Voltage (IO = 40 mA, TJ = +25°C)
mA
ELECTRICAL CHARACTERISTICS (VI = –19 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF, –40°C < TJ +125°C (for MC79LXXAC),
0°C < TJ < +125°C (for MC79LXXAB)).
MC79L12C, AB
Characteristics
Output Voltage (TJ = +25°C)
Input Regulation
(TJ = +25°C)
–14.5 Vdc ≥ VI ≥ –27 Vdc
–16 Vdc ≥ VI ≥ –27 Vdc
Load Regulation
TJ = +25°C, 1.0 mA ≤ IO ≤ 100 mA
1.0 mA ≤ IO ≤ 40 mA
MC79L12AC, AB
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
VO
Regline
–11.1
–12
–12.9
–11.5
–12
–12.5
Vdc
mV
–
–
–
–
250
200
–
–
–
–
250
200
–
–
–
–
100
50
–
–
–
–
100
50
–10.8
–10.8
–
–
–13.2
–13.2
–11.4
–11.4
–
–
–12.6
–12.6
–
–
–
–
6.5
6.0
–
–
–
–
6.5
6.0
–
–
–
–
1.5
0.2
–
–
–
–
1.5
0.2
Regload
mV
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 = +25°C)
(TJ = +125°C)
Input Bias Current Change
–16 Vdc ≥ VI ≥ –27 Vdc
1.0 mA ≤ IO ≤ 40 mA
VO
Output Noise Voltage
(TA = +25°C, 10 Hz ≤ f ≤ 100 kHz)
Ripple Rejection
(–15 ≤ VI ≤ –25 Vdc, f = 120 Hz, TJ = +25°C)
Dropout Voltage (IO = 40 mA, TJ = +25°C)
Vn
–
80
–
–
80
–
µV
RR
36
42
–
37
42
–
dB
|VI–VO|
–
1.7
–
–
1.7
–
Vdc
2
Vdc
IIB
mA
IIB
mA
MOTOROLA ANALOG IC DEVICE DATA
MC79L00, A Series
ELECTRICAL CHARACTERISTICS (VI = –23 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF, –40°C < TJ +125°C (for MC79LXXAB),
0°C < TJ < +125°C (for MC79LXXAC)).
MC79L15C
Characteristics
MC79L15AC, AB
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
Output Voltage (TJ = +25°C)
VO
–13.8
–15
–16.2
–14.4
–15
–15.6
Vdc
Input Regulation
(TJ = +25°C)
–17.5 Vdc ≥ VI ≥ –30 Vdc
–20 Vdc ≥ VI ≥ –30 Vdc
Regline
Load Regulation
TJ = +25°C, 1.0 mA ≤ IO ≤ 100 mA
1.0 mA ≤ IO ≤ 40 mA
Regload
Output Voltage
–17.5 Vdc ≥ VI ≥ –Vdc, 1.0 mA ≤ IO ≤ 40 mA
VI = –23 Vdc, 1.0 mA ≤ IO ≤ 70 mA
VO
Input Bias Current
(TJ = +25°C)
(TJ = +125°C)
IIB
mV
–
–
–
–
300
250
–
–
–
–
300
250
–
–
–
–
150
75
–
–
–
–
150
75
–13.5
–13.5
–
–
–16.5
–16.5
–14.25
–14.25
–
–
–15.75
–15.75
–
–
–
–
6.5
6.0
–
–
–
–
6.5
6.0
–
–
–
–
1.5
0.2
–
–
–
–
1.5
0.1
mV
Vdc
mA
Input Bias Current Change
–20 Vdc ≥ VI ≥ –30 Vdc
1.0 mA ≤ IO ≤ 40 mA
∆IIB
Output Noise Voltage
(TA = +25°C, 10 Hz ≤ f ≤ 100 kHz)
VN
–
90
–
–
90
–
µV
Ripple Rejection
(–18.5 ≤ VI ≤ –28.5 Vdc, f = 120 Hz)
RR
33
39
–
34
39
–
dB
|VI–VO|
–
1.7
–
–
1.7
–
Vdc
Dropout Voltage
IO = 40 mA, TJ = +25°C
mA
ELECTRICAL CHARACTERISTICS (VI = –27 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF, 0°C < TJ > +125°C, unless otherwise noted).
MC79L18C
Characteristics
MC79L18AC
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
Output Voltage (TJ = +25°C)
VO
–16.6
–18
–19.4
–17.3
–18
–18.7
Vdc
Input Regulation
(TJ = +25°C)
–20.7 Vdc ≥ VI ≥ –33 Vdc
–21.4 Vdc ≥ VI ≥ –33 Vdc
–22 Vdc ≥ VI ≥ –33 Vdc
–21 Vdc ≥ VI ≥ –33 Vdc
Regline
Load Regulation
TJ = +25°C, 1.0 mA ≤ IO ≤ 100 mA
1.0 mA ≤ IO ≤ 40 mA
Regload
mV
–
–
–
–
–
–
–
–
–
325
275
–
–
–
–
–
–
–
–
–
325
–
–
275
–
–
–
–
170
85
–
–
–
–
170
85
–
–
–
–
–19.8
–19.8
–17.1
–
–17.1
–
–
–
–18.9
–
–18.9
–
–
–
–
6.5
6.0
–
–
–
–
6.5
6.0
–
–
–
–
–
–
–
1.5
0.2
–
–
–
–
–
–
1.5
–
0.1
mV
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
VO
Input Bias Current
(TJ = +25°C)
(TJ = +125°C)
IIB
Input Bias Current Change
–21 Vdc ≥ VI ≥ –33 Vdc
–27 Vdc ≥ VI ≥ –33 Vdc
1.0 mA ≤ IO ≤ 40 mA
IIB
Output Noise Voltage
(TA = +25°C, 10 Hz ≤ f ≤ 100 kHz)
Vn
–
150
–
–
150
–
µV
Ripple Rejection
(–23 ≤ VI ≤ –33 Vdc, f = 120 Hz, TJ = +25°C)
RR
32
46
–
33
48
–
dB
|VI–VO|
–
1.7
–
–
1.7
–
Vdc
Dropout Voltage
IO = 40 mA, TJ = +25°C
MOTOROLA ANALOG IC DEVICE DATA
Vdc
–
–16.2
–16.2
mA
mA
3
MC79L00, A Series
ELECTRICAL CHARACTERISTICS (VI = –33 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF, 0°C < TJ < +125°C, unless otherwise noted).
MC79L24C
Characteristics
MC79L24AC
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
Output Voltage (TJ = +25°C)
VO
–22.1
–24
–25.9
–23
–24
–25
Vdc
Input Regulation
(TJ = +25°C)
–27 Vdc ≥ VI ≥ –38 Vdc
–27.5 Vdc ≥ VI ≥ –38 Vdc
–28 Vdc ≥ VI ≥ –38 Vdc
Regline
Load Regulation
TJ = +25°C, 1.0 mA ≤ IO ≤ 100 mA
1.0 mA ≤ IO ≤ 40 mA
Regload
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
VO
Input Bias Current
(TJ = +25°C)
(TJ = +125°C)
IIB
mV
–
–
–
–
–
–
–
350
300
–
–
–
–
–
–
350
–
300
–
–
–
–
200
100
–
–
–
–
200
100
–
–21.4
–21.4
–
–
–
–
–26.4
–26.4
–22.8
–
–22.8
–
–
–
–25.2
–
–25.2
–
–
–
–
6.5
6.0
–
–
–
–
6.5
6.0
–
–
–
–
1.5
0.2
–
–
–
–
1.5
0.1
mV
Vdc
mA
∆IIB
Input Bias Current Change
–28 Vdc ≥ VI ≥ –38 Vdc
1.0 mA ≤ IO ≤ 40 mA
mA
Output Noise Voltage
(TA = +25°C, 10 Hz ≤ f ≤ 100 kHz)
Vn
–
200
–
–
200
–
µV
Ripple Rejection
(–29 ≤ VI ≤ –35 Vdc, f = 120 Hz, TJ = +25°C)
RR
30
43
–
31
47
–
dB
|VI–VO|
–
1.7
–
–
1.7
–
Vdc
Dropout Voltage
IO = 40 mA, TJ = +25°C
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 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 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
Figure 2. Standard Application
Input
+Vin
+VO
MC78LXX
0.1µF
0.33µF
CI*
0.33µF
Output
MC79LXX
CO**
0.1µF
0.1µF
–Vin
0.33µF
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 = +25°C, unless otherwise noted.)
Figure 4. Dropout Voltage versus
Junction Temperature
Figure 3. Dropout Characteristics
MC79L05C
VO = –5.0 V
TJ = 25°C
6.0
IO = 1.0 mA
4.0
IO = 100 mA
2.0
IO = 40 mA
0
0
–2.0
–4.0
–6.0
Vin, INPUT VOLTAGE (V)
–0.8
–2.5
V I –V O , INPUT/OUTPUT DIFFERENTIAL
VOLTAGE (V)
–2.0
IO = 70 mA
IO = 40 mA
–1.5
IO = 1.0 mA
–1.0
Dropout of Regulation is
defined when
∆VO = 2% of VO
–0.5
0
–10
0
25
Figure 5. Input Bias Current versus
Ambient Temperature
I IB , INPUT BIAS CURRENT (mA)
I IB , INPUT BIAS CURRENT (mA)
5.0
4.0
3.8
3.6
3.4
MC79L05C
Vin = –10 V
VO = –5.0 V
IO = 40 mA
3.2
3.0
0
0
25
50
75
100
TA, AMBIENT TEMPERATURE (°C)
4.0
3.0
MC79L05C
VO = –5.0 V
IO = 40 mA
2.0
1.0
0
125
Figure 7. Maximum Average Power Dissipation
versus Ambient Temperature (TO–92)
0
–5.0
–10
–15
–20
–25
–30
Vin, INPUT VOLTAGE (V)
–35
170
RθJA , THERMAL RESISTANCE
JUNCTION–TO–AIR (°C/W)
1,000
No Heatsink
100
RΘJA = 200°C/W
PD(max) to 25°C = 625 mW
25
50
75
100
125
TA, AMBIENT TEMPERATURE (°C)
MOTOROLA ANALOG IC DEVICE DATA
3.2
150
2.8
PD(max) for TA = +50°C
130
2.4
ÎÎÎ
ÎÎÎ
ÎÎÎ
ÎÎÎ
ÎÎÎ
ÎÎÎ ÎÎÎ
110
Graph represents symmetrical layout
90
L
70
2.0 oz.
Copper
L
50
0
10
20
30
L, LENGTH OF COPPER (mm)
2.0
1.6
1.2
3.0 mm
RθJA
30
150
–40
Figure 8. SOP–8 Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
10,000
P D , POWER DISSIPATION (mW)
125
Figure 6. Input Bias Current versus
Input Voltage
4.2
10
50
75
100
TJ, JUNCTION TEMPERATURE (°C)
40
0.8
0.4
50
PD, MAXIMUM POWER DISSIPATION (W)
VO , OUTPUT VOLTAGE (V)
8.0
5
MC79L00, A Series
OUTLINE DIMENSIONS
A
P SUFFIX
PLASTIC PACKAGE
CASE 29–04
ISSUE AD
B
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.
R
P
L
F
SEATING
PLANE
K
DIM
A
B
C
D
F
G
H
J
K
L
N
P
R
V
D
X X
G
J
H
V
C
SECTION X–X
1
N
N
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
–––
D SUFFIX
PLASTIC PACKAGE
CASE 751–05
(SOP–8)
ISSUE R
D
A
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.
C
8
5
0.25
H
E
M
B
M
1
4
h
B
X 45 _
e
q
A
C
SEATING
PLANE
L
0.10
A1
B
0.25
M
C B
S
A
S
DIM
A
A1
B
C
D
E
e
H
h
L
q
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_
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How to reach us:
USA / EUROPE / Locations Not Listed: Motorola Literature Distribution;
P.O. Box 20912; Phoenix, Arizona 85036. 1–800–441–2447 or 602–303–5454
JAPAN: Nippon Motorola Ltd.; Tatsumi–SPD–JLDC, 6F Seibu–Butsuryu–Center,
3–14–2 Tatsumi Koto–Ku, Tokyo 135, Japan. 03–81–3521–8315
MFAX: [email protected] – TOUCHTONE 602–244–6609
INTERNET: http://Design–NET.com
ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park,
51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298
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MOTOROLA ANALOG IC DEVICE
DATA
MC79L00/D