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参数资料
| 型号： | PTH08T261WAZT |
| 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 COMPLIAT PACKAGE-10 |
| 文件页数： | 4/38页 |
| 文件大小： | 1206K |
| 代理商： | PTH08T261WAZT |
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R
SET
=10k
x
W
0.69
V
-0.69
O
-1.43k W
+Sense
PTH08T260W
5
4
3
Sense
GND
+Sense
Sense
GND
9
6
VOAdj
RSET
1%
0.05 W
VO
UDG06080
SLTS272F
– DECEMBER 2006 – REVISED APRIL 2011
APPLICATION INFORMATION
ADJUSTING THE OUTPUT VOLTAGE
The VO Adjust control (pin 7) sets the output voltage of the PTH08T260/261W. The adjustment range 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 the –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 required resistor value can either be calculated using the following formula, or
simply selected from the values given in Table 2. Figure 9 shows the placement of the required resistor.
(1)
Table 1. Preferred Values of RSET for Standard Output Voltages
VO (Standard) (V)
RSET (Standard Value) (k)
VO (Actual) (V)
5.0 (1)
0.169
5.01
3.3
1.2
3.30
2.5
2.37
2.51
1.8
4.7
1.81
1.5
6.98
1.51
1.2 (2)
12.1
1.20
1.0 (2)
20.5
1.01
0.7 (2)
681
0.70
(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 7 and 6, as close to the regulator as possible, using dedicated PCB traces.
(2)
Never connect capacitors from VO Adjust to either GND, VO, or +Sense. Any capacitance added to the VO Adjust pin
affects the stability of the regulator.
Figure 9. VO Adjust Resistor Placement
12
Copyright
2006–2011, Texas Instruments Incorporated
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| PTH-11810-B | 功能描述:罩类、盒类及壳类产品 3.58"x 3.11"x 1.77" 1-way, black RoHS:否 制造商:Bud Industries 产品:Boxes 外部深度:6.35 mm 外部宽度:6.35 mm 外部高度:2.56 mm NEMA 额定值: IP 等级: 材料:Acrylonitrile Butadiene Styrene (ABS) 颜色:Red |
| PTH-11810-G | 功能描述:罩类、盒类及壳类产品 3.58"x 3.11"x 1.77" 1-way, gray RoHS:否 制造商:Bud Industries 产品:Boxes 外部深度:6.35 mm 外部宽度:6.35 mm 外部高度:2.56 mm NEMA 额定值: IP 等级: 材料:Acrylonitrile Butadiene Styrene (ABS) 颜色:Red |
| PTH-11811-B | 功能描述:罩类、盒类及壳类产品 3.58"x 4.80"x 1.77" 2-way, black RoHS:否 制造商:Bud Industries 产品:Boxes 外部深度:6.35 mm 外部宽度:6.35 mm 外部高度:2.56 mm NEMA 额定值: IP 等级: 材料:Acrylonitrile Butadiene Styrene (ABS) 颜色:Red |
| PTH-11811-G | 功能描述:罩类、盒类及壳类产品 3.58"x 4.80"x 1.77" 2-way, gray RoHS:否 制造商:Bud Industries 产品:Boxes 外部深度:6.35 mm 外部宽度:6.35 mm 外部高度:2.56 mm NEMA 额定值: IP 等级: 材料:Acrylonitrile Butadiene Styrene (ABS) 颜色:Red |
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