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参数资料
| 型号： | PTH08T220WAZ |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 封装： | ROHS COMPLIANT, PLASTIC, DIP-11 |
| 文件页数： | 3/38页 |
| 文件大小： | 1290K |
| 代理商： | PTH08T220WAZ |
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APPLICATION INFORMATION
ADJUSTING THE OUTPUT VOLTAGE
R
=10k
x
SET
W
0.69
V
-0.69
O
-1.43kW
(1)
5
3
4
6
7
GND
8
GND
+Sense
VO
Sense
V Adj
O
PTH08T220W/221W
RSET
1%
0.05W
+Sense
VO
Sense
CO
www.ti.com................................................................................................................................................... SLTS252K – NOVEMBER 2005 – REVISED JUNE 2009
The Vo Adjust control (pin 8) sets the output voltage of the PTH08T220/221W. The adjustment range of the
PTH08T220/221W is 0.69 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 – Sense pins. Table 1 gives the standard value
of the external resistor for a number of standard voltages, along with the actual output voltage that this resistance
value provides.
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 12 shows the placement of the required
resistor.
Table 1. Standard Values of RSET for Standard Output Voltages
VO (Standard)
RSET (Standard Value)
VO (Actual)
5.0 V (1)
169
5.005 V
3.3 V
1.21 k
3.304 V
2.5 V
2.37 k
2.506 V
1.8 V
4.75 k
1.807 V
1.5 V
6.98 k
1.510 V
1.2 V (2)
12.1 k
1.200 V
1.0 V (2)
20.5 k
1.004 V
0.7 V (2)
681 k
0.700 V
(1)
For VO > 3.6 V, the minimum input voltage is (VO + 2) V.
(2)
For output voltages
≤ 1.2V, at nominal operating frequency, the output ripple may increase (typically
2×) when operating at input voltages greater than (VO × 11). When using the SmartSync feature,
review the SmartSync application section for further guidance.
(1)
RSET: Use a 0.05 W resistor with a tolerance of 1% and temperature stability of 100 ppm/°C (or better). Connect the
resistor directly between pins 8 and 7, as close to the regulator as possible, using dedicated PCB traces.
(2)
Never connect capacitors from VO Adjust to either + Sense, GND, or VO. Any capacitance added to the VO Adjust pin
affects the stability of the regulator.
Figure 12. VO Adjust Resistor Placement
Copyright 2005–2009, Texas Instruments Incorporated
11
Product Folder Link(s): PTH08T220W PTH08T221W
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| PTH08T221WAZT | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| PTH08T220WAST | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PTH08T220WAZ | 制造商:Texas Instruments 功能描述:DC/DC Converter (DC-DC) / Switching Regu |
| PTH08T220WAZT | 功能描述:DC/DC转换器 16A 4.5-14V-Input Wide-Out Adj 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: |
| PTH08T221W | 制造商:TI 制造商全称:Texas Instruments 功能描述:16-A, 4.5-V to 14-V INPUT, NON-ISOLATED, WIDE-OUTPUT, ADJUSTABLE POWER MODULE WITH TurboTrans |
| PTH08T221WAD | 功能描述:DC/DC转换器 16A 4.5V to 14V Inp Ceramic Cap Version 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: |
| PTH08T221WAD | 制造商:Texas Instruments 功能描述:Power Module |
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