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參數(shù)資料
| 型號(hào)： | PTH04070WAST |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 3 A SWITCHING REGULATOR, PDMA5 |
| 封裝： | DIP-5 |
| 文件頁數(shù)： | 15/17頁 |
| 文件大小： | 409K |
| 代理商： | PTH04070WAST |
www.ti.com
APPLICATION INFORMATION
Adjusting the Output Voltage of the PTH04070W Wide-Output Adjust Power Modules
Rset + 10 kW
0.891 V
Vout * 0.9 V
* 3.24 kW
Inhibit
GND
RSET
0.05 W
1%
C1
Ceramic
C2
Ceramic
PTH04070W
2
4
3
1
5
VO Adj
GND
VO
VIN
47-
F
47-
F
VI
VO
Inhibit
SLTS227B – SEPTEMBER 2004 – REVISED OCTOBER 2007
The VOAdjust control (pin 4) sets the output voltage of the PTH04070W product. The adjustment range is from
0.9 V to 3.6 V. The adjustment method requires the addition of a single external resistor, RSET, that must be
connected directly between the VOAdjust and GND pin 2. Table 1 gives the standard external resistor for a
number of common bus voltages, along with the actual voltage the resistance produces.
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 Rset for Common Output
Voltages
VO (V)
RSET (k)
VO(V)
(Required)
(Standard Value)
(Actual)
3.3(1)
0.475
3.298
2.5(1)
2.32
2.502
2
4.87
1.999
1.8
6.65
1.801
1.5
11.5
1.504
1.2
26.1
1.204
1
84.5
1.001
0.9
Open
0.9
(1)
The minimum input voltage is 3 V or (VO + 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 4 and 2
using dedicated PCB traces.
(2)
Never connect capacitors from VOAdjust to either GND or VO. Any capacitance added to the VOAdjust pin will affect
the stability of the regulator.
Figure 9. VO Adjust Resistor Placement
Copyright 2004–2007, Texas Instruments Incorporated
7
Product Folder Link(s): PTH04070W
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| PTH04070WAZ | 功能描述:DC/DC轉(zhuǎn)換器 3-A 3.3/5-V Input Adj Swtch 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: |
| PTH04070WAZ | 制造商:Texas Instruments 功能描述:IC 制造商:Texas Instruments 功能描述:IC, ADJ SWITCHING REGULATOR, SMT MODULE |
| PTH04070WAZT | 功能描述:DC/DC轉(zhuǎn)換器 3-A 3.3/5-V Input Adj Swtch 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: |
| PTH04T220W | 制造商:TI 制造商全稱:Texas Instruments 功能描述:16-A, 2.2-V to 5.5-V INPUT, NON-ISOLATED, WIDE-OUTPUT, ADJUSTABLE POWER MODULE WITH TURBOTRANS |
| PTH04T220WAD | 功能描述:DC/DC轉(zhuǎn)換器 16-A 2.2-V to 5.5-V Input 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: |
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