MC78BC30NTR ON, MC78BC30NTR Datasheet - Page 3

• Manufacturer Part Number: MC78BC30NTR
• Description: Micropower Voltage Regulator
• Manufacturer: ON

Dropout Voltage - The input/output voltage differential at
which the regulator output no longer maintains regulation
against further reductions in input voltage. Measured when
the output drops 100 mV below its nominal value (which is
measured at 1.0 V differential), dropout voltage is affected
by junction temperature, load current and minimum input
supply requirements.
Line Regulation - The change in output voltage for a
change in input voltage. The measurement is made under
conditions of low dissipation or by using pulse techniques
0.50
0.40
0.30
0.20
0.10
3.2
3.0
2.8
2.6
2.4
2.2
2.0
0
Figure 3. Dropout Voltage versus Output Current
0
Figure 1. Output Voltage versus Input Voltage
I
O
MC78BC50NTR & MJD32C
= 0 mA
3.0
200
I
O
I
O
= 500 mA
= 100 mA
4.0
I
O
400
V
, OUTPUT CURRENT (mA)
in
, INPUT VOLTAGE (V)
T
A
5.0
= 25 C
600
6.0
T
A
800
T
A
= −30 C
= 80 C
7.0
MC78BC30NTR
T
A
= 25 C
1000
8.0
MC78BC00 Series
http://onsemi.com
DEFINITIONS
1200
9.0
3
such that average chip temperature is not significantly
affected.
Load Regulation - The change in output voltage for a
change in load current at constant chip temperature.
Maximum Power Dissipation - The maximum total device
dissipation for which the regulator will operate within
specifications.
Supply Current - Current which is used to operate the
regulator chip and is not delivered to the load.
4.962
4.958
4.954
4.950
4.946
4.942
60
50
40
30
20
10
1.0 k
0
0
Figure 2. Output Voltage versus Output Current
C
I
T
MC78BC50NTR & MJD32C
O
MC78BC50NTR
& MJD32C
T
A
L
A
= 200 mA
= 25 C
= 10 mF
= 25 C
100
10 k
Figure 4. Ripple Rejection as a
Function of Frequency
I
O
200
, OUTPUT CURRENT (mA)
f, FREQUENCY (Hz)
100 k
300
1.0 M
400
V
in
= 6.0 V
10 M
V
in
500
= 5.1 V
100 M
600