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參數資料
| 型號： | MC78T05C |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | THREE-TERMINAL POSITIVE FIXED VOLTAGE REGULATORS |
| 中文描述： | 三端固定電壓調節器 |
| 文件頁數： | 6/12頁 |
| 文件大小： | 162K |
| 代理商： | MC78T05C |
MC78T00 Series
6
MOTOROLA ANALOG IC DEVICE DATA
VOLTAGE REGULATOR PERFORMANCE
The performance of a voltage regulator is specified by its
immunity to changes in load, input voltage, power dissipation,
and temperature. Line and load regulation are tested with a
pulse of short duration (< 100
μ
s) and are strictly a function of
electrical gain. However, pulse widths of longer duration (>
1.0 ms) are sufficient to affect temperature gradients across
the die. These temperature gradients can cause a change in
the output voltage, in addition to changes caused by line and
load regulation. Longer pulse widths and thermal gradients
make it desirable to specify thermal regulation.
Thermal regulation is defined as the change in output
voltage caused by a change in dissipated power for a
specified time, and is expressed as a percentage output
voltage change per watt. The change in dissipated power
can be caused by a change in either the input voltage or the
load current. Thermal regulation is a function of IC layout and
die attach techniques, and usually occurs within 10 ms of a
change in power dissipation. After 10 ms, additional changes
in the output voltage are due to the temperature coefficient of
the device.
Figure 1 shows the line and thermal regulation response of
a typical MC78T05AC to a 20 W input pulse. The variation of
the output voltage due to line regulation is labeled
and the
thermal regulation component is labeled
. Figure 2 shows
the load and thermal regulation response of a typical
MC78T05AC to a 20 W load pulse. The output voltage
variation due to load regulation is labeled
and the thermal
regulation component is labeled
.
2
1
2
1
Figure 1. MC78T05AC Line and Thermal Regulation
Figure 2. MC78T05AC Load and Thermal Regulation
V
Vout = 5.0 V
Vin = 15
Iout = 0 A
→
2.0 A
→
0 A
t, TIME (2.0 ms/DIV)
I
O
C
V
(
O
,
,
1
2
2.0
0
Vout = 5.0 V
Vin = 8.0 V
→
18 V
→
8.0 V
Iout = 2.0 A
= Regline = 2.4 mV
= Regtherm = 0.0015%VO/W
t, TIME (2.0 ms/DIV)
V
i
V
V
V
(
O
,
,
1
2
18
8.0
2
2
= Regline = 4.4 mV
= Regtherm = 0.0015%VO/W
Representative Schematic Diagram
Q1
Q2
Q4
Q5
Q8
Q9
Q10
Q12
Q13
Q6
Q7
Q11
3.9k
Q14
Q15
Q17
Q18
Q16
Q20
Q19
Q23
Q22
Q24
Q21
Q25
Q26
Q27
Q3
1.0k
210
Input
16k
6.7V
300
1.0k
100
200
3.6k
6.4k
520
3.0k
5.6k
10pF
300
13
0.12
Output
200
50
2.6k
6.0k
40
pF
Gnd
2.8k
2.0k
6.0k
1.0k
8.0–15 VO
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MC78T05CT | 功能描述:線性穩壓器 - 標準 Positive Voltage Reg 3Terminal 3a RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負載調節: 最大輸入電壓:5.5 V 線路調整率: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| MC78T05CTBU | 功能描述:線性穩壓器 - 標準 RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負載調節: 最大輸入電壓:5.5 V 線路調整率: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| MC78T08CT | 制造商:ON Semiconductor 功能描述:IC, LDO VOLT REG, 8V, 3A, TO-220, Primary Input Voltage:23V, Output Voltage Fixe |
| MC78T12ACT | 功能描述:IC REG LDO 12V 3A TO220AB RoHS:否 類別:集成電路 (IC) >> PMIC - 穩壓器 - 線性 系列:- 產品變化通告:Heatsink Pkg Change 09/Oct/2007 標準包裝:50 系列:- 穩壓器拓撲結構:正，固定式 輸出電壓:24V 輸入電壓:最高 40 V 電壓 - 壓降（標準）:2V @ 1A 穩壓器數量:1 電流 - 輸出:1A 電流 - 限制（最小）:- 工作溫度:0°C ~ 125°C 安裝類型:通孔 封裝/外殼:TO-220-3 供應商設備封裝:TO-220-3 包裝:管件 |
| MC78T12BT | 制造商:ON Semiconductor 功能描述:IC, LDO VOLT REG, 12V, 3A, TO-220, Primary Input Voltage:22V, Output Voltage Fix |
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