參數(shù)資料
型號: PTH03000WAST
廠商: TEXAS INSTRUMENTS INC
元件分類: 電源模塊
英文描述: 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
封裝: SMT-5
文件頁數(shù): 11/13頁
文件大?。?/td> 375K
代理商: PTH03000WAST
Application Notes
For technical support and further information visit http://power.ti.com
PTH03000W
Adjusting the Output Voltage of the PTH03000W
Wide-Output Adjust Power Modules
The Vo Adjust control (pin 4) sets the output voltage of
the PTH03000Wproduct. The adjustment range is
from 0.9 V to 2.5 V. The adjustment method requires
the addition of a single external resistor, Rset, that must
be connected directly between the Vo Adjust and GND
pins 1. Table 2-1 gives the preferred 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 2-2.
Figure 2-1 shows the placement of the required resistor.
Rset
= 10 k
0.891 V
– 4.99 k
Vout – 0.9 V
Figure 2-1; V
o
Adjust Resistor Placement
Notes:
1. Use a 0.1 W resistor. 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 1
using dedicated PCB traces.
2. Never connect capacitors from Vo Adjust to either GND or
Vout. Any capacitance added to the Vo Adjust pin will affect
the stability of the regulator.
0.900
Open
0.92535
1 k
0.950
173 k
0.975114 k
1.000
84.1 k
1.02566.3 k
1.050
54.4 k
1.07545
.9 k
1.100
39.6 k
1.12534.6 k
1.150
30.7 k
1.17527.4 k
1.200
24.7 k
1.22522.4 k
1.250
20.5 k
1.27518.8 k
1.300
17.3 k
1.32516.0 k
1.350
14.8 k
1.37513.8 k
1.400
12.8 k
1.42512.0 k
1.450
11.2 k
1.47510.5
k
Vout (Standard)
Rset (Pref’d Value)
Vout (Actual)
2.5 V
576
2.501V
2 V
3.09 k
2.003 V
1.8 V
4.87 k
1.804 V
1.5 V
9.76 k
1.504 V
1.2 V
24.3 k
1.204 V
1 V
82.5 k
1.002 V
0.9 V
Open
0.9 V
Table 2-1; Preferred Values of R
set
for Standard Output Voltages
Table 2-2; Output Voltage Set-Point Resistor Values
Va Req’dRset
1.50
9.86 k
1.55
8.72 k
1.60
7.74 k
1.656.89 k
1.70
6.15 k
1.755
.49 k
1.80
4.91 k
1.854.39 k
1.90
3.92 k
1.953.5
0 k
2.00
3.11 k
2.052.76 k
2.10
2.44 k
2.152.14 k
2.20
1.86 k
2.251.61 k
2.30
1.37 k
2.351.15
k
2.40
950
2.4575
8
2.50
579
PTH03000W
V
IN
1
4
5
2
3
C
IN
100F
(Required)
+
C
OUT
100F
(Optional)
+
Inhibit
GND
V
OUT
R
SET
0.1 W, 1 %
V
O Adj
GND
Inhibit
V
IN
V
O
相關PDF資料
PDF描述
PTH03050WAD 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
PTH03050WAST 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
PTH03050WAS 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
PTH03050WAH 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
PTH04000WAH 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
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