Használati útmutató Steren MC7812CT
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MC7812CT
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Oldal 1/20
Semiconductor Components Industries, LLC, 2002
April, 2002 – Rev. 10
1Publication Order Number:
MC7800/D
MC7800, MC7800A, LM340,
LM340A Series, NCV7805
1.0 A Positive Voltage
Regulators
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 Oered in 2% and 4% Tolerance
•Available in Surface Mount D 2PAK, DPAK and Standard 3–Lead
Transistor Packages
MAXIMUM RATINGS (TA = 25°C, unless otherwise noted.)
Rating Symbol Value Unit
Input Voltage (5.0 – 18 V) VI35 Vdc
Input Voltage (24 V) 40
Power Dissipation
Case 221A (TO–220)
TA = 25°C PDInternally
Limited
W
Thermal Resistance, Junction–to–Ambient R
θJA 65 C/W°
Thermal Resistance, Junction–to–Case R
θJC 5.0 C/W°
Case 936 (D2PAK)
TA = 25°C PDInternally
Limited
W
Thermal Resistance, Junction–to–Ambient R
θJA See
Figure
14
°C/W
Thermal Resistance, Junction–to–Case R
θJA 5.0 C/W°
Case 369A (DPAK)
TA = 25°C PDInternally
Limited
W
Thermal Resistance, Junction–to–Ambient R
θJA 92 C/W°
Thermal Resistance, Junction–to–Case R
θJC 5.0 C/W°
Storage Junction Temperature Range T
stg –65 to
+150
°C
Operating Junction Temperature T
J+150 C°
NOTE: ESD data available upon request.
TO–220
T SUFFIX
CASE 221A
1
D2PAK
D2T SUFFIX
CASE 936
2
3
See detailed ordering and shipping information in the package
dimensions section on page 16 of this data sheet.
ORDERING INFORMATION
Heatsink surface
connected to Pin 2.
Pin 1. Input
2. Ground
3. Output
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
1
3
STANDARD APPLICATION
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,
MC78XX
Input
Cin
*
0.33 FµCO**
Output
These two digits of the type number
indicate nominal voltage.
Cin is required if regulator is located an
appreciable distance from power supply
lter.
CO is not needed for stability; however,
it does improve transient response. Values
of less than 0.1 µF could cause instability.
*
**
See general marking information in the device marking
section on page 18 of this data sheet.
DEVICE MARKING INFORMATION
1
3
DPAK
DT SUFFIX
CASE 369A
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MC7800, MC7800A, LM340, LM340A Series, NCV7805
http://onsemi.com
2
R15
680
R18
100 k
D1
Zener R1
10.66 k
R2
1.56 k
R17
9.0 k
Q7
QNPN
LAT
Q17
Q9
QNPN 2
Q8
QNPN
Q14
QNPN
Q6
QNPN
Q5
QNPN 2
LAT 3 A
Q18
R5
4.5 k
R6
1.0 k
Q13
QNPN Q2
QNPN 4
SUB
Q11 2
R11
15 k
QNPN 6
Q1
R7
14 k
R3
1.8 k
R8
5.0 k
Diode
Q16
Q4
QNPN
N+
C1
30 P
C2
3.0 P
R9
3.0 k
R16
600
R20
17500
Q15
QNPN
Q10
QNPN
R22
100
Q12
QNPN
R24
50
1.0 P
R21
600 R23
0.2
R19
27.5 k
D2
Zener
Q19
QNPN
R14
1.0 k
Q20
QNPN
R28
9.0 k
R27
9.0 k
R29
9.0 k
R25
6.0 k
R26
3.0 k
R12
3.0 k
R10
3340-(3316ACT)
R30
18 k
Sense
Vout
5.01
Vin
R13
11660
Q3
QNPN
MC7800
C3
Figure 1. Representative Schematic Diagram
This device contains 22 active transistors.
MC7800, MC7800A, LM340, LM340A Series, NCV7805
http://onsemi.com
3
ELECTRICAL CHARACTERISTICS (Vin = 10 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MC7805B, NCV7805 MC7805C/LM340T–5
Characteristic Symbol Min Max Min Max UnitTyp Typ
Output Voltage (TJ = 25°C) VO4.8 5.0 5.2 4.8 5.0 5.2 Vdc
Output Voltage (5.0 mA I≤O ≤ 1.0 A, PD
≤15 W)
VOVdc
7.0 Vdc ≤ Vin – – – 4.75 5.0 5.25≤ 20 Vdc
8.0 Vdc ≤ Vin 4.75 5.0 5.25 – – –≤ 20 Vdc
Line Regulation (Note 2) Reg
line mV
7.5 Vdc ≤ Vin – 5.0 100 – 0.5 20≤ 20 Vdc, 1.0 A
8.0 Vdc ≤ Vin – 1.3 50 – 0.8 10≤ 12 Vdc
Load Regulation (Note 2) Reg
load mV
5.0 mA I≤O – 1.3 100 – 1.3 25≤ 1.0 A
5.0 mA I≤O ≤ 1.5 A (TA = 25°C) – 0.15 50 – 1.3 25
Quiescent Current IB– 3.2 8.0 – 3.2 6.5 mA
Quiescent Current Change ∆IBmA
7.0 Vdc ≤ Vin – – – – 0.3 1.0≤ 25 Vdc
5.0 mA I≤O ≤ 1.0 A (TA = 25°C) – – 0.5 – 0.08 0.8
Ripple Rejection RR – 68 – 62 83 – dB
8.0 Vdc ≤ Vin ≤ 18 Vdc, f = 120 Hz
Dropout Voltage (IO = 1.0 A, TJ = 25°C) VI – VO– 2.0 – – 2.0 – Vdc
Output Noise Voltage (T
A = 25°C) Vn– 10 – – 10 – V/VµO
10 Hz 100 kHz≤ f ≤
Output Resistance f = 1.0 kHz r
O– 0.9 – – 0.9 – mΩ
Short Circuit Current Limit (TA = 25°C) I
SC – 0.2 – – 0.6 – A
Vin = 35 Vdc
Peak Output Current (TJ = 25°C) Imax – 2.2 – – 2.2 – A
Average Temperature Coefficient of
Output Voltage
TCVO– –0.3 – – –0.3 – mV/ C°
ELECTRICAL CHARACTERISTICS (Vin = 10 V, IO = 1.0 A, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MC7805AB/MC7805AC/LM340AT–5
Characteristic Symbol Min Max UnitTyp
Output Voltage (TJ = 25°C) VO4.9 5.0 5.1 Vdc
Output Voltage (5.0 mA I≤O ≤ 1.0 A, PD V≤15 W) O4.8 5.0 5.2 Vdc
7.5 Vdc ≤ Vin ≤ 20 Vdc
Line Regulation (Note 2) Reg
line mV
7.5 Vdc ≤ Vin ≤ 25 Vdc, IO = 500 mA – 0.5 10
8.0 Vdc ≤ Vin ≤ 12 Vdc, IO = 1.0 A – 0.8 12
8.0 Vdc ≤ Vin ≤ 12 Vdc, IO = 1.0 A, TJ = 25°C – 1.3 4.0
7.3 Vdc ≤ Vin ≤ 20 Vdc, IO = 1.0 A, TJ = 25°C – 4.5 10
Load Regulation (Note 2) Reg
load mV
5.0 mA I≤O ≤ 1.5 A, TJ = 25°C – 1.3 25
5.0 mA I≤O – 0.8 25≤ 1.0 A
250 mA ≤ IO – 0.53 15≤ 750 mA
Quiescent Current IB– 3.2 6.0 mA
Quiescent Current Change ∆IBmA
8.0 Vdc ≤ Vin ≤ 25 Vdc, IO = 500 mA – 0.3 0.8
7.5 Vdc ≤ Vin ≤ 20 Vdc, TJ = 25°C – – 0.8
5.0 mA I≤O – 0.08 0.5≤ 1.0 A
1. Tlow = 0°C for MC78XXAC, C, LM340AT–XX, LM340T–XX T
high = +125°C for MC78XXAC, C, LM340AT–XX, LM340T–XX, NCV7805
= 40°C for MC78XXB, MC78XXAB, NCV7805
2. Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
Termékspecifikációk
| Márka: | Steren |
| Kategória: | nincs kategorizálva |
| Modell: | MC7812CT |
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