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參數(shù)資料
| 型號： | NCV8509 |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | Sequenced Linear Dual-Voltage Regulator |
| 中文描述： | 連續(xù)線性雙電壓調(diào)節(jié)器 |
| 文件頁數(shù)： | 11/16頁 |
| 文件大小： | 123K |
| 代理商： | NCV8509 |
NCV8509 Series
http://onsemi.com
11
Figure 30. Power Shunt
R
EX
V
IN1
V
IN2
V
OUT2
Voltage
Regulator
Figure 31. Power On Chip
0
0
V
IN
0.2
0.4
0.6
0.8
1.0
1.2
1.8
W
5
10
15
20
25
1.4
1.6
R
EX
> 138
R
EX
= 138
R
EX
< 138
I
OUT2
= 100 mA
Figure 32.
135
V
IN1
18 V
V
IN2
4.5 V
R
LOAD
V
OUT2
2.5 V
100 mA
135
V
IN1
6.0 V
V
IN2
3.1 V
R
LOAD
V
OUT2
2.5 V
21.5 mA
135
V
IN1
6.0 V
V
IN2
4.5 V
R
LOAD
V
OUT2
2.5 V
100 mA
78.5 mA
+
600 mV
Figure 33.
Figure 34.
21.5 mA
100 mA
21.5 mA
Why Use a Power Shunt
The power shunt circuitry helps manage and optimize
power dissipation on the integrated circuit.
Figure 32 shows a 100 mA load. A 135
resistor
dissipates 1.35 W as shown.
Without the power shunt, the 135
resistor would run
into head room issues at 6.0 V and would only be able to
drive 21.5 mA as shown in Figure 33 before causing the
2.5 V output to collapse.
Figure 34 shows the power shunt circuitry adding the
current back in at low voltage operation. So the power is
moved off chip at high voltage where it is needed most.
To further clarify, Figure 35 shows the maximum allowed
resistor value (29
) without the power shunt for 6.0 V
operation.
Figure 36 shows the scenario at high voltage. Only 290 mW
of power is dissipated off chip compared to Figure 32 with
1.35 W.
Figure 35.
29
V
IN1
18 V
V
IN2
15.1 V
R
LOAD
V
OUT2
2.5 V
100 mA
Figure 36.
29
V
IN1
6.0 V
V
IN2
3.1 V
R
LOAD
V
OUT2
2.5 V
100 mA
+
600 mV
100 mA
100 mA
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| NCV8509PDW18 | Sequenced Linear Dual-Voltage Regulator |
| NCV8509PDW18R2 | Sequenced Linear Dual-Voltage Regulator |
| NCV8509PDW25 | Sequenced Linear Dual-Voltage Regulator |
| NCV8509PDW25R2 | Sequenced Linear Dual-Voltage Regulator |
| NCV8509PDW26 | Sequenced Linear Dual-Voltage Regulator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| NCV8509/D | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Sequenced Linear Dual-Voltage Regulator |
| NCV8509_06 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Sequenced Linear Dual−Voltage Regulator |
| NCV8509PDW18 | 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) 1.8V 100mA Sequenced 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(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| NCV8509PDW18G | 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) 1.8V 100mA Sequenced Dual 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(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| NCV8509PDW18R2 | 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) 1.8V 100mA Sequenced 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(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
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