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PDF T7812CT Data sheet ( Hoja de datos )
| Número de pieza | T7812CT | |
| Descripción | MCT7812CT | |
| Fabricantes | Motorola Semiconductors | |
| Logotipo |  |
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 1. 12V, Voltage Regulator - MCT7812CT  Hay una vista previa y un enlace de descarga de T7812CT (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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Order this document by MCT7800/D
ThreeĆTerminal 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 fixed voltage regulators, 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 Offered with a 4% Tolerance
• Available in Surface Mount D2PAK and Standard 3-Lead Transistor
Packages
MCT7800
Series
THREE-TERMINAL
POSITIVE FIXED
VOLTAGE REGULATORS
T SUFFIX
PLASTIC PACKAGE
CASE 221A
Heatsink surface
connected to Pin 2.
1
2
3
Pin 1. Input
2. Ground
3. Output
This MCT-prefixed device is intended to be a possible replacement for the similar
device with the MC-prefix. Because the MCT device originates from different source
material, there may be subtle differences in typical parameter values or
characteristic curves. Due to the diversity of potential applications, Motorola can not
assure identical performance in all circuits. Motorola recommends that the
customer qualify the MCT-prefixed device in each potential application.
DEVICE TYPE/NOMINAL OUTPUT VOLTAGE
MCT7805
MCT7806
MCT7808
MCT7809
5.0 V
6.0 V
8.0 V
9.0 V
MCT7812
MCT7815
MCT7818
MCT7824
12 V
15 V
18 V
24 V
ORDERING INFORMATION
Device
Output Voltage Tested Operating
Tolerance
Temperature Range
Package
MCT78XXBD2T
Surface Mount
MCT78XXBT
TJ = – 40° to +125°C
Insertion Mount
4%
MCT78XXCD2T
Surface Mount
MCT78XXCT
TJ = 0° to +125°C
Insertion Mount
XX indicates nominal voltage.
MOTOROLA
D2T SUFFIX
PLASTIC PACKAGE
CASE 936
(D2PAK)
12
3
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
STANDARD APPLICATION
Input
Cin*
0.33 µF
MCT78XX
Output
CO**
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.
** Some CO is recommended for stability; it does
improve transient response. Values less than
0.1 µF could cause instability.
© Motorola, Inc. 1994
Rev 3
MCT7800
1
Free Datasheet http://www.datasheet4u.net/
1 page  
MCT7800
ELECTRICAL CHARACTERISTICS (Vin = 15 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MCT7809B
MCT7809C
Characteristics
Symbol Min Typ Max Min Typ Max
Output Voltage (TJ = +25°C)
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PO ≤15 W)
11.5 Vdc ≤ Vin ≤ 24 Vdc
12.5 Vdc ≤ Vin ≤ 24 Vdc
Line Regulation, TJ = +25°C (Note 2)
11.5 Vdc ≤ Vin ≤ 26 Vdc
11.5 Vdc ≤ Vin ≤ 17 Vdc
Load Regulation, TJ = +25°C (Note 2)
5.0 mA ≤ IO ≤ 1.5 A
250 mA ≤ IO ≤ 750 mA
Quiescent Current (TJ = +25°C)
Quiescent Current Change
11.5 Vdc ≤ Vin ≤ 26 Vdc
12.5 Vdc ≤ Vin ≤ 26 Vdc
5.0 mA ≤ IO ≤ 1.0 A
Ripple Rejection
11.5 Vdc ≤ Vin ≤ 21.5 Vdc, f = 120 Hz
Dropout Voltage (IO = 1.0 A, TJ = +25°C)
Output Noise Voltage (TA = +25°C)
10 Hz ≤ f ≤ 100 kHz
VO 8.65 9.0 9.35 8.65 9.0 9.35
VO
— — — 8.55 9.0 9.45
8.55 9.0 9.45
—
—
—
Regline
— 8.0 50 — 8.0 50
— 4.0 25 — 4.0 25
Regload
— 3.0 50 — 3.0 50
— 2.0 25 — 2.0 25
IB — 5.5 8.0 — 5.5 8.0
∆IB
— — — — — 1.0
— — 1.0 — — —
— — 0.5 — — 0.5
RR
— 62 — — 62 —
VI – VO
—
2.0 —
—
2.0
—
Vn
— 10 — — 10 —
Output Resistance f = 1.0 kHz
Short Circuit Current Limit (TA = +25°C)
Vin = 35 Vdc
Peak Output Current (TJ = +25°C)
Average Temperature Coefficient of Output Voltage
rO — 18 —
ISC
— 0.2 —
Imax — 2.2 —
TCVO — –1.0 —
— 18 —
— 0.2 —
— 2.2 —
— –1.0 —
Unit
Vdc
Vdc
mV
mV
mA
mA
dB
Vdc
µV/VO
mΩ
A
A
mV/°C
ELECTRICAL CHARACTERISTICS (Vin = 19 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MCT7812B
MCT7812C
Characteristics
Symbol Min Typ Max Min Typ Max Unit
Output Voltage (TJ = +25°C)
VO 11.5 12 12.5 11.5 12 12.5 Vdc
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PO ≤15 W)
14.5 Vdc ≤ Vin ≤ 27 Vdc
15.5 Vdc ≤ Vin ≤ 27 Vdc
VO Vdc
— — — 11.4 12 12.6
11.4 12 12.6 — — —
Line Regulation, TJ = +25°C (Note 2)
14.5 Vdc ≤ Vin ≤ 30 Vdc
16 Vdc ≤ Vin ≤ 22 Vdc
Regline
—
—
10 240
5.0 120
—
—
mV
10 240
5.0 120
Load Regulation, TJ = +25°C (Note 2)
5.0 mA ≤ IO ≤ 1.5 A
250 mA ≤ IO ≤ 750 mA
Regload
—
—
3.0 240
2.0 120
—
—
mV
3.0 240
2.0 120
Quiescent Current (TJ = +25°C)
IB — 5.5 8.0 — 5.5 8.0 mA
Quiescent Current Change
14.5 Vdc ≤ Vin ≤ 30 Vdc
15 Vdc ≤ Vin ≤ 30 Vdc
5.0 mA ≤ IO ≤ 1.0 A
∆IB mA
— — — — — 1.0
— — 1.0 — — —
— — 0.5 — — 0.5
NOTES: 1. Tlow = 0°C for MCT78XXC
= – 40°C for MCT78XXB
Thigh = +125°C for MCT78XXB, C. When the junction temperature exceeds +125°C, internal current limiting
will reduce the output current to less than 1.0 A at a VI–VO of 15 V or
greater. The MC7800 die will supply more current under the same conditions.
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.
MOTOROLA
MCT7800
5
Free Datasheet http://www.datasheet4u.net/
5 Page 
MCT7800
NOTES
MOTOROLA
MCT7800
11
Free Datasheet http://www.datasheet4u.net/
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet T7812CT.PDF ] | |
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