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參數(shù)資料
| 型號(hào)： | PTH04000WAS1 |
| 廠商： | Texas Instruments, Inc. |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| 中文描述： | 抗輻射高效，5安培開關(guān)穩(wěn)壓器 |
| 文件頁數(shù)： | 7/20頁 |
| 文件大小： | 1347K |
| 代理商： | PTH04000WAS1 |
www.ti.com
APPLICATION INFORMATION
Adjusting the Output Voltage of the PTH04000W Wide-Output Adjust Power Modules
The
V
Adjust
control (pin 5) sets the output voltage of the PTH04000W product. The adjustment range is from
0.9 V to 3.6 V. The adjustment method requires the addition of a single external resistor, R
SET
, that must be
connected directly between the
V
O
Adjust
and
GND
pin 1.
Table 1
gives the standard external resistor for a
number of common bus voltages, along with the actual voltage the resistance produces.
R
SET
=10k
x
W
0
.
8
9
1
V
V -0.9V
O
-3.24k
W
V
I
+
GND
GND
1
5
6
3
4
2
Track
V
I
V
O
V
O
GND
Inhibit
V Adj
O
C
47 F
(Required)
I
μ
PTH04000W
C
47 F
(Optional)
O
μ
R
0.05W
SET
1%
PTH04000W
SLTS247A–JUNE 2005–REVISED JULY 2005
For other output voltages, the value of the required resistor can either be calculated using the following formula,
or simply selected from the range of values given in
Table 2
.
Figure 9
shows the placement of the required
resistor.
Table 1. Standard Values of R
set
for Common Output
Voltages
V
R
V
(Required)
3.3 V
(1)
2.5 V
(1)
2 V
1.8 V
1.5 V
1.2 V
1 V
0.9 V
(Standard Value)
475
2.32 k
4.87 k
6.65 k
11.5 k
26.1 k
84.5 k
Open
(Actual)
3.298 V
2.502 V
1.999 V
1.801 V
1.504 V
1.204 V
1.001 V
0.9 V
(1)
The minimum input voltage is 3 V or (V
O
+ 1.1) V, whichever is
greater.
(1)
A 0.05-W rated resistor may be used. The tolerance should be 1%, with a temperature stability of 100 ppm/°C (or
better). Place the resistor as close to the regulator as possible. Connect the resistor directly between pins 5 and 1
using dedicated PCB traces.
Never connect capacitors from
V
O
Adjust
to either
GND
or
V
O
. Any capacitance added to the
V
O
Adjust
pin affects the
stability of the regulator.
Figure 9. V
O
Adjust Resistor Placement
(2)
7
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|---|---|
| PTH04000WAST | 功能描述:DC/DC轉(zhuǎn)換器 3A 3.3/5V Input Adj Switching Regulator RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸: |
| PTH04000WAZ | 功能描述:DC/DC轉(zhuǎn)換器 3A 3.3/5V Input Adj Switching Regulator RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸: |
| PTH04000WAZ1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:3-A, 3.3/5-V INPUT, ADJUSTABLE SWITCHING REGULATOR |
| PTH04000WAZT | 功能描述:DC/DC轉(zhuǎn)換器 3A 3.3/5V Input Adj Switching Regulator RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸: |
| PTH04040 | 制造商:ARTESYN 制造商全稱:Artesyn Technologies 功能描述:DC-DC CONVERTERS POLA Non-isolated |
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