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参数资料
| 型号： | PTH08080WAS |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 2.25 A SWITCHING REGULATOR, 300 kHz SWITCHING FREQ-MAX, PDMA5 |
| 封装： | ROHS COMPLIANT PACKAGE-5 |
| 文件页数： | 15/17页 |
| 文件大小： | 520K |
| 代理商： | PTH08080WAS |
www.ti.com
APPLICATION INFORMATION
Adjusting the Output Voltage of the PTH08080W Wide-Output Adjust Power Modules
R
=10k
x
SET
W
0.891 V
V
-0.9V
out
-1.82kW
VI
GND
VO
RSET
0.05W
1%
PTH08080W
2
4
3
1
5
V Adj
O
GND
Inhibit
VI
VO
CI
CO
D1(SeeNote3)
SLTS235C – FEBRUARY 2005 – REVISED FEBRUARY 2008
The VO Adjust control (pin 4) sets the output voltage of the PTH08080W product. The adjustment range is from
0.9 V to 5.5 V. The adjustment method requires the addition of a single external resistor, RSET, that must be
connected directly between the VO Adjust 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 10 shows the placement of the required
resistor.
Table 1. Standard Values of RSET for Common Output
Voltages
VO
Rset
VO
(Required)
(Standard Value)
(Actual)
5 V(1)
348
5.010 V
3.3 V
1.87 k
3.315 V
2.5 V
3.74 k
2.503 V
2 V
6.19 k
2.012 V
1.8 V
8.06 k
1.802 V
1.5 V(2)
13.0 k
1.501 V
1.2 V(2)
27.4 k
1.205 V
1 V(2)
86.6 k
1.001 V
0.9 V(2)
Open
0.9 V
(1)
The minimum input voltage is 4.5 V or (VO + 1.1) V, whichever is
greater.
(2)
The maximum input voltage is 18 V or (VO × 10) V, whichever is
lesser.
(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 VO Adjust to either GND or VO. Any capacitance added to the VO Adjust pin affects the
stability of the regulator.
(3)
The protection diode, D1, is required whenever the output voltage setpoint is adjusted to 5.25 V (or higher) and VI is
16 V or greater.
Figure 10. VO Adjust Resistor Placement
Copyright 2005–2008, Texas Instruments Incorporated
7
Product Folder Link(s) :PTH08080W
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PTH08080WAST | 功能描述:DC/DC转换器 2.25A Wide Input/ Out Adj Mini Pwr Mdl RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸: |
| PTH08080WAZ | 功能描述:DC/DC转换器 2.25A Wide Input/ Out Adj Mini Pwr Mdl RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸: |
| PTH08080WAZT | 功能描述:DC/DC转换器 2.25A Wide Input/ Out Adj Mini Pwr Mdl RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸: |
| PTH08080WBH | 功能描述:DC/DC转换器 2.25A,4.5-18Vin Wide Adjust Mini Pwr Mod RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸: |
| PTH08082WAS | 制造商:Texas Instruments 功能描述: |
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