Samsung SG648, SG688, SG606, BG606, BG60 Glossary

15. Main components specifications

1) REGULATOR

3-TERMINAL 1A POSITIVE VOLTAGE GRGULATORS

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 Electronics 59

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

Symbol

Vo

∆Vo

∆Vo

Id

∆Id

∆Vo/∆T

Vn

RR

VD
RO

ISC

Ipeak

Ti = 25°C

Ti = 25°C

Test Conditions

Ti = 25°C

5.0mA≤Io≤1.0A, P≤15W
Vin = 14.5V to 27V

Vi = 15.5V to 27V
Vi = 14.5V to 30V

Vi = 16V to 22V

Io = 5.0mA to 1.5V

Io = 250mA to 750mA

Ti = 25°C

Io = 5mA to 1.0A

Vi = 14.5V to 30V

Vi = 15V to 30V

Io = 5mA

f = 10Hz to 100KHz Ti = 25°C

fF = 120Hz

Vi = 15 to 25V

Io = 1A, Ti = 25°C

f = 1KHz

Vi = 35V, Ti = 25°C

Ti = 25°C

Min

11.5

11.4

55

MC7805C

Typ

12

12

10

3.0
12

4.0

5.1

-1

75

71

2

18

250

2.2

Max

12.5

12.6

240
120
240
120

8

0.5

1.0

Unit

V

mV

mV

mA

mA

mV/°C

µ/V

dB

V
mΩ
mA

A

* Tmin < Ti < Tmax

MC78XXI : Tmin = -40°C, Tmax = 125C
MC78XXC, Tmin = 0°C, Tmax = 125°C

* 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.

60 Samsung Electronics