The MC78XX/MC78XXA series of three-terminal positive regulators are available in
the TO-220 package and with several fixed output voltaes, making it useful in a
wide range of applicationes. These regulaators can provide local oncard regulation,
eliminating the distribution problems assciated with single point regulation. Each
type employs internal current limiting, thermal shut-down and safe area protection,
making it essentially indestructible. If adequate heat sinking is provided, they can
delive over aA output corrent. Although designed primarily as fixed voltage
regulators, these devices can be used with external components to obtain
adjustable voltages and currents. MC78XXI is characterized for operation from -40°
°Cto +125°c, and MC78XXC from 0°c to +125°c
TO-220 1 2 3 1 : Input 2 : GND 3 : Output
FEATURES
• UOutput Current up to 1.5A
• UOutput voltages of 5;6;8;9;10;11;12;15;18;24V
• UThermal Overload Protection
• UShort Circuit Protection
• UOutput Transistor SOA Protection
• UNo external components required
• UOutput current in excess of 1A
• UIndustrial and commercial temperature range
BLOCK DIAGRAM
ORDERING INFORMATION
Device
Device
MC78XXCT
MC78XXCT
MC78XXACT
MC78XXACT
MC78XXT
MC78XXT
Package
TO-220
TO-220
TO-220
Operating Temperature
0~+125°C
-40~+125°C
ABSOLUTE MAXIMUM RATINGS
Characteristic
Input Voltage (for Vo = 5V to 18V)
(for Vo = 24V)
Thermal Resistance Junction - Cases
Thermal Resistance Junction - Air
Operating Temperature Range MC78XXC/AC
MC78XXI
Storage Temperature Range
Symbol
VIN
VIN
θJC
θ♣JA
Topr
Tstg
Rating
35
40
5
65
0 ~ +125
-40 ~ +125
-65 ~ +150
Unit
V
V
°C/W
θ/W
°C
°C
°C
Samsung Electronics59
Page 2
2) REGULATOR(MC7812C)
ELECTRICAL CHARACTERISTICS MC7812
(Refer to test circuit, Tmin < Ti < Tmax, Vi = 500mA, Vi = 19V, Ci = 0.33µF, Co = 1.0µFunless otherwise specified)
Characteristic
Output Voltage
Line Regulation
Load Regulation
Quiescent Current
Quiescent Current Change
Output Voltage Drift
Output Noise Boltage
Ripple
Rejection
Dropout Voltage
Output Resistance
Short Circuit Current
Peak Current
* Load and line regulation are specified at constant junction temperature. Changes in Vo due to heating effects must be taken into
account separately. Pulse testint with low duty is used.
˚C
˚C
Samsung Electronics61
Page 4
HIGH-VOLTAGE, HIGH-CURRENT
SOURCE DRIVERS
Series UDS2980H and UDS2980R hermetically sealed source
drivers link standard low-power digital logic and relays, solenoids,
magnetic print hammers, stepping motors, LEDs, and lamps in
applications requiring separate logic and load grounds, load supply
voltages to +80V, and load currents to 500 mA.
Types UDS2981H/R and UDS2983H/R are intended for use
with 5v logic systems(TTL, Schottky TTL. DTL and 5V CMOS).
UDS2982H/R and UDS2984H/R integrated circuits are intended for
MOS interface (PMOS and CMOS) operating from supply voltages
of from 6 to 16V.
Types UDS2981H/R and UDS2982H/R will withstand an output
OFF voltage of 50 V. UDS2983H/R and UDS2984H/R drivers will
withstand a maximum output OFF voltage of 80V.
Under normal operating conditions, the devices will sustain 50
mA continuously on each of the eight outputs at an ambient
temperature of +85°c and with a supply voltage of 15V. All types
include input current-limiting resistors and output transientsuppression diodes. In all cases, outputs are swiched ON by an
active high input level.
Note that the maximum current rating may not be obtained at 55°c because of reduced beta, or at +125°c because of package
power limitations.
Dwg No A 10243
ABSOLUTE MAXIMUM RATINGS
at +25°c Free-Air Temperature
Cutput Voltage Range, VCE
(UDS298t and
UDS2982H/R).......................................5V to 50V
(UDS2983 and
UDS2984H/R).....................................35V to 80V
*All inputs simultaneously.
**Pused test.
*Complete part number includes a terminal letter that indicates package (H = ceramic/metal side-brazed. R = ceramic/glass cer-DIP).
Collector-Base Voltage
Collector-Emitter Voltage
Emitter-Base Voltage
Collector Current
Collector Dissipation
Junction Temperature
Storage Temperature
Symbol
VCBO
VCBO
VCBO
IC
PC
TI
Tstg
Rating
50
50
10
100
300
150
-55-150
ELECTRICAL CHARACTERISTICS (Ta=25˚C)
Characteristic
Collector-Base Breakdown Voltage
Collector-Emitter Breakdown Voltage
Collector Cutoff Current
DC Current Gain
Collector-Emitter Saturation Voltage
Output Capacitance
Current Gain-Bandwidth Product
Input Off Voltage
Input On Voltage
Input Resistor
Resistor Ratio