These voltage regulators are monolithic integrated circuits designed as
fixed–voltage regulators for a wide variety of applications including local,
on–card regulation. These regulators employ internal current limiting,
thermal shutdown, and safe–area compensation. With adequate heatsinking
they can deliver output currents in excess of 1.0 A. Although designed
primarily as a fixed voltage regulator, these devices can be used with
external components to obtain adjustable voltages and currents.
• Output Current in Excess of 1.0 A
• No External Components Required
• Internal Thermal Overload Protection
• Internal Short Circuit Current Limiting
• Output Transistor Safe–Area Compensation
• Output Voltage Of fered in 2% and 4% Tolerance
• Available in Surface Mount D
Packages
• Previous Commercial Temperature Range has been Extended to a
MC78XXACT
LM340AT–XX
MC78XXACD2T
MC78XXCT
LM340T–XX
MC78XXCD2TSurface Mount
XX indicates nominal voltage.
Tolerance
2%
4%
Operating
Temperature Range
–
J
= –
°
°
Package
Surface Mount
MOTOROLA ANALOG IC DEVICE DATA
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.
XX,
These two digits of the type number
indicate nominal 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. Values
of less than 0.1 µF could cause instability.
Motorola, Inc. 1997Rev 5
1
MC7800, MC7800A, LM340, LM340A Series
MAXIMUM RATINGS (T
= 25°C, unless otherwise noted.)
A
RatingSymbolValueUnit
Input Voltage (5.0 – 18 V)V
I
Input Voltage (24 V)40
Power Dissipation
Case 221A
TA = 25°CP
Thermal Resistance, Junction–to–AmbientR
Thermal Resistance, Junction–to–CaseR
θJA
θJC
Internally LimitedW
D
Case 936 (D2PAK)
TA = 25°CP
Thermal Resistance, Junction–to–AmbientR
Thermal Resistance, Junction–to–CaseR
Storage Junction Temperature RangeT
Operating Junction TemperatureT
NOTE: ESD data available upon request.
θJA
θJA
stg
Internally LimitedW
D
See Figure 13°C/W
–65 to +150°C
J
Representative Schematic Diagram
R18
100 k
D1
Zener
Q7
QNPN
R17
9.0 k
R1
10.66 k
R2
1.56 k
Q8
QNPN
LAT
Q17
Q6
QNPN
Q9
QNPN 2
Q14
QNPN
Q5
QNPN 2
R6
1.0 k
MC7800
R11
15 k
R5
4.5 k
C2
3.0 P
Q13
QNPN
R24
50
LAT 3 A
Q18
Q1
QNPN 6
R7
14 kR31.8 kR85.0 k
Q10
QNPN
Q15
QNPN
Q2
QNPN 4
C3
R22
100
R20
17500
N+
Q4
QNPN
Q16
Diode
35Vdc
65°C/W
5.0°C/W
5.0°C/W
+150°C
Q19
QNPN
1.0 P
Q12
QNPN
R16
3340–(3316ACT)
600
R9
3.0 k
SUB
C1
30 P
Q3
QNPN
Q11 2
R21
600
D2
Zener
R19
27.5 k
R10
R14
1.0 k
R12
3.0 k
R25
6.0 k
R26
3.0 k
R13
11660
R15
680
Q20
QNPN
R23
0.2
V
R29
9.0 k
R28
9.0 k
R27
9.0 k
in
V
out
5.01
R30
18 k
Sense
This device contains 22 active transistors.
2
MOTOROLA ANALOG IC DEVICE DATA
MC7800, MC7800A, LM340, LM340A Series
ELECTRICAL CHARACTERISTICS (V
CharacteristicSymbolMinTypMaxUnit
Output Voltage (TJ = 25°C)V
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W)V
7.0 Vdc ≤ Vin ≤ 20 Vdc4.755.05.25
8.0 Vdc ≤ Vin ≤ 20 Vdc–––
Line Regulation (Note 2)Reg
7.5 Vdc ≤ Vin ≤ 20 Vdc, 1.0 A–0.520
8.0 Vdc ≤ Vin ≤ 12 Vdc–0.810
Load Regulation (Note 2)Reg
5.0 mA ≤ IO ≤ 1.0 A–1.325
5.0 mA ≤ IO ≤ 1.5 A (TA = 25°C)-1.325
Quiescent CurrentI
Quiescent Current Change∆I
7.0 Vdc ≤ Vin ≤ 25 Vdc–0.31.0
5.0 mA ≤ IO ≤ 1.0 A (TA = 25°C)–0.080.8
Ripple RejectionRR6283–dB
8.0 Vdc ≤ Vin ≤ 18 Vdc, f = 120 Hz
Dropout Voltage (IO = 1.0 A, TJ = 25°C)VI – V
Output Noise Voltage (TA = 25°C)V
10 Hz ≤ f ≤ 100 kHz
Output Resistance f = 1.0 kHzr
Short Circuit Current Limit (TA = 25°C)I
Vin = 35 Vdc
Peak Output Current (TJ = 25°C)I
Average Temperature Coef ficient of Output VoltageTCV
= 10 V, IO = 500 mA, TJ = T
in
low
to T
[Note 1], unless otherwise noted.)
high
MC7805C/LM340T–5
O
O
line
load
B
B
O
n
O
SC
max
O
4.85.05.2Vdc
–3.26.5mA
–2.0–Vdc
–10–µV/V
–0.9–mΩ
–0.6–A
–2.2–A
––0.3–mV/°C
Vdc
mV
mV
mA
O
ELECTRICAL CHARACTERISTICS (V
CharacteristicSymbolMinTypMaxUnit
Output Voltage (TJ = 25°C)V
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W)V
250 mA ≤ IO ≤ 750 mA–0.5315
Quiescent CurrentI
Quiescent Current Change∆I
8.0 Vdc ≤ Vin ≤ 25 Vdc, IO = 500 mA–0.30.8
7.5 Vdc ≤ Vin ≤ 20 Vdc, TJ = 25°C––0.8
5.0 mA ≤ IO ≤ 1.0 A–0.080.5
Ripple RejectionRR6883–dB
8.0 Vdc ≤ Vin ≤ 18 Vdc, f = 120 Hz, IO = 500 mA
Dropout Voltage (IO = 1.0 A, TJ = 25°C)VI – V
NOTES: 1. T
= –40°C for MC78XXAC, C, LM340AT–XX, LM340T–XXT
low
2.Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
= 10 V, IO = 1.0 A, TJ = T
in
to T
low
= +125°C for MC78XXAC, C, LM340AT–XX, LM340T–XX
high
[Note 1], unless otherwise noted.)
high
MC7805AC/LM340AT–5
O
O
line
load
B
B
O
4.95.05.1Vdc
4.85.05.2Vdc
–3.26.0mA
–2.0–Vdc
mV
mV
mA
MOTOROLA ANALOG IC DEVICE DATA
3
MC7800, MC7800A, LM340, LM340A Series
ELECTRICAL CHARACTERISTICS (continued)
(Vin = 10 V, IO = 1.0 A, TJ = T
low
to T
[Note 1], unless otherwise noted.)
high
MC7805AC/LM340AT–5
CharacteristicSymbolMinTypMaxUnit
Output Noise Voltage (TA = 25°C)V
n
–10–µV/V
10 Hz ≤ f ≤ 100 kHz
Output Resistance (f = 1.0 kHz)r
Short Circuit Current Limit (TA = 25°C)I
O
SC
–0.9–mΩ
–0.2–A
Vin = 35 Vdc
Peak Output Current (TJ = 25°C)I
Average Temperature Coef ficient of Output VoltageTCV
NOTES: 1. T
ELECTRICAL CHARACTERISTICS (V
= –40°C for MC78XXAC, C, LM340AT–XX, LM340T–XXT
low
2.Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
= 11 V, IO = 500 mA, TJ = T
in
high
max
O
= +125°C for MC78XXAC, C, LM340AT–XX, LM340T–XX
low
to T
[Note 1], unless otherwise noted.)
high
–2.2–A
––0.3–mV/°C
MC7806C
CharacteristicSymbolMinTypMaxUnit
Output Voltage (TJ = 25°C)V
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W)V
O
O
5.756.06.25Vdc
8.0 Vdc ≤ Vin ≤ 21 Vdc5.76.06.3
9.0 Vdc ≤ Vin ≤ 21 Vdc–––
Line Regulation, TJ = 25°C (Note 2)Reg
line
8.0 Vdc ≤ Vin ≤ 25 Vdc–0.524
9.0 Vdc ≤ Vin ≤ 13 Vdc–0.812
Load Regulation, TJ = 25°C (Note 2)Reg
load
–1.330mV
5.0 mA ≤ IO ≤ 1.5 A
Quiescent Current (TJ = 25°C)I
Quiescent Current Change∆I
B
B
–3.38.0mA
8.0 Vdc ≤ Vin ≤ 25 Vdc–0.31.3
5.0 mA ≤ IO ≤ 1.0 A–0.080.5
Ripple RejectionRR5865–dB
9.0 Vdc ≤ Vin ≤ 19 Vdc, f = 120 Hz
Dropout Voltage (IO = 1.0 A, TJ = 25°C)VI – V
Output Noise Voltage (TA = 25°C)V
O
n
–2.0–Vdc
–10–µV/V
10 Hz ≤ f ≤ 100 kHz
Output Resistance f = 1.0 kHzr
Short Circuit Current Limit (TA = 25°C)I
O
SC
–0.9–mΩ
–0.2–A
Vin = 35 Vdc
Peak Output Current (TJ = 25°C)I
Average Temperature Coef ficient of Output VoltageTCV
NOTES: 1. T
= –40°C for MC78XXAC, C T
low
2.Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account
separately . Pulse testing with low duty cycle is used.
= +125°C for MC78XXAC, C
high
max
O
–2.2–A
––0.3–mV/°C
O
Vdc
mV
mA
O
4
MOTOROLA ANALOG IC DEVICE DATA
MC7800, MC7800A, LM340, LM340A Series
ELECTRICAL CHARACTERISTICS (V
CharacteristicSymbolMinTypMaxUnit
Output Voltage (TJ = 25°C)V
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W)V
8.6 Vdc ≤ Vin ≤ 21 Vdc
Line Regulation (Note 2)Reg
8.6 Vdc ≤ Vin ≤ 25 Vdc, IO = 500 mA–5.012
9.0 Vdc ≤ Vin ≤ 13 Vdc, IO = 1.0 A–1.415
Load Regulation (Note 2)Reg
5.0 mA ≤ IO ≤ 1.5 A, TJ = 25°C–1.325
5.0 mA ≤ IO ≤ 1.0 A–0.925
250 mA ≤ IO ≤ 750 mA–0.215
Quiescent CurrentI
Quiescent Current Change∆I
5.0 mA ≤ IO ≤ 1.5 A
Quiescent CurrentI
Quiescent Current Change∆I
10.5 Vdc ≤ Vin ≤ 25 Vdc––1.0
5.0 mA ≤ IO ≤ 1.0 A––0.5
Ripple RejectionRR5662–dB
11.5 Vdc ≤ Vin ≤ 18 Vdc, f = 120 Hz
Dropout Voltage (IO = 1.0 A, TJ = 25°C)VI – V
Output Noise Voltage (TA = 25°C)V
10 Hz ≤ f ≤ 100 kHz
NOTES: 1. T
= –40°C for MC78XXAC, C T
low
2.Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account
separately . Pulse testing with low duty cycle is used.
= 14 V, IO = 500 mA, TJ = T
in
= +125°C for MC78XXAC, C
high
low
to T
[Note 1], unless otherwise noted.)
high
MC7808C
O
O
line
load
B
B
O
n
7.78.08.3Vdc
7.68.08.4Vdc
–1.435mV
–3.38.0mA
–2.0–Vdc
–10–µV/V
mV
mA
O
MOTOROLA ANALOG IC DEVICE DATA
5
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