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参数资料
| 型号： | PTV12010WAH |
| 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： | SIP-8 |
| 文件页数： | 21/22页 |
| 文件大小： | 386K |
| 代理商： | PTV12010WAH |
www.ti.com
APPLICATION INFORMATION
ADJUSTING THE OUTPUT VOLTAGE
PTV12010
+
GND
GN D
GND
VO
VO Adj
VO
CO
100 mF
(Optional)
RSET
1%, 0.05W
SLTS234B – DECEMBER 2004 – REVISED FEBRUARY 2007
The VO Adjust control (pin 8) sets the output voltage of the PTV12010 product. The adjustment range is from
1.2 V to 5.5 V for the W-suffix modules and 0.8 V to 1.8 V for L-suffix modules. The adjustment method requires
the addition of a single external resistor, RSET, that must be connected directly between the VO Adjust and GND
(pin 1 or 2). 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 Equation 1 or simply selected from the range of values given in
Table 3.Figure 11 shows the placement of the required resistor.
Table 1. Standard Values of RSET for Common Output Voltages
PTV12010W
PTV12010L
VO (V)
RSET (k)
VO (V)
RSET (k)
VO (V)
(Required)
(Standard Value)
(Actual)
(Standard Value)
(Actual)
5
0.280
5.009
N/A
3.3
2.0
3.294
N/A
2.5
4.32
2.503
N/A
2
8.06
2.010
N/A
1.8
11.5
1.801
0.130
1.800
1.5
24.3
1.506
3.57
1.499
1.2
Open
1.200
12.1
1.201
1.1
N/A
18.7
1.101
1.0
N/A
32.4
0.999
0.9
N/A
71.5
0.901
0.8
N/A
Open
0.800
(1)
A 0.05-W rated resistor may be used. 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 pin 8 and pins
1 or 2, using dedicated PCB traces.
(2)
Never connect capacitors from VoAdj to either GND or Vo. Any capacitance added to the VoAdj pin affects the
stability of the regulator.
Figure 11. VO Adjust Resistor Placement
8
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