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参数资料
| 型号： | PTH05T210WAZT |
| 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-14 |
| 文件页数： | 30/31页 |
| 文件大小： | 1135K |
| 代理商： | PTH05T210WAZT |
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APPLICATION INFORMATION
ADJUSTING THE OUTPUT VOLTAGE
R
SET +
30.1 kW
0.7
V
O *
0.7
* 6.49 kW
(1)
5
9
3
4
7
8
10
11
GND
12
GND
+Sense
VO
Sense
VOAdj
Sense
RSET
1%
0.05 W
CO
PTH05T210W
SLTS263I – AUGUST 2007 – REVISED MARCH 2009 ...................................................................................................................................................... www.ti.com
The VO Adjust control (pin 12) sets the output voltage of the PTH05T210W. The adjustment range of the
PTH05T210W is 0.7V to 3.6V. The adjustment method requires the addition of a single external resistor, RSET,
that must be connected directly between the Vo Adjust and GND 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 6 shows the placement of the required
resistor.
Table 1. Standard Values of RSET for Standard Output Voltages
VO (Standard) (V)
RSET (Standard Value) ()
VO (Actual) (V)
3.3
1.62 k
3.298
2.5
5.23 k
2.498
2
9.76 k
1.997
1.8
12.7 k
1.798
1.5
19.6 k
1.508
1.2
35.7 k
1.199
1
63.4 k
1.001
0.7
Open
0.700
(1)
Use a 0.05 W resistor. The tolerance should be 1%, with temperature stability of 100 ppm/°C (or better). Place the
resistor as close to the regulator as possible. Connect the resistor directly between pins 12 and 8 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.
Figure 6. VO Adjust Resistor Placement
8
Copyright 2007–2009, Texas Instruments Incorporated
Product Folder Link(s): PTH05T210W
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相关代理商/技术参数 |
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