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參數資料
| 型號： | MC78BC31NTR |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Micropower Voltage Regulator |
| 中文描述： | FIXED POSITIVE LDO REGULATOR, PDSO5 |
| 封裝： | PLASTIC, SOT-23, 5 PIN |
| 文件頁數： | 3/8頁 |
| 文件大?。?/td> | 60K |
| 代理商： | MC78BC31NTR |
MC78BC00 Series
http://onsemi.com
3
DEFINITIONS
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
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.
10 k
60
0
4.962
0
0.50
2.0
3.2
f, FREQUENCY (Hz)
I
O
, OUTPUT CURRENT (mA)
V
I
O
, OUTPUT CURRENT (mA)
VO
Figure 1. Output Voltage versus Input Voltage
V
in
, INPUT VOLTAGE (V)
Figure 2. Output Voltage versus Output Current
Figure 3. Dropout Voltage versus Output Current
Figure 4. Ripple Rejection as a
Function of Frequency
VO
100
3.0
200
300
4.0
6.0
8.0
9.0
400
600
3.0
2.8
2.6
2.4
2.2
4.958
4.954
4.950
4.942
0.40
0.30
0.10
0.20
0
50
40
30
20
10
0
1.0 k
5.0
7.0
500
200
400
600
800
1000
100 k
1.0 M
10 M
1200
100 M
4.946
R
T
A
= 30
°
C
I
O
= 0 mA
I
O
= 100 mA
I
O
= 500 mA
T
A
= 80
°
C
MC78BC30NTR
T
A
= 25
°
C
MC78BC50NTR
& MJD32C
T
A
= 25
°
C
V
in
= 6.0 V
V
in
= 5.1 V
MC78BC50NTR & MJD32C
C
L
= 10 F
I
O
= 200 mA
T
A
= 25
°
C
MC78BC50NTR & MJD32C
T
A
= 25
°
C
i
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