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PTH05050WAD Datasheet(PDF) 6 Page - Texas Instruments

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Part # PTH05050WAD
Description  6-A, 5-V INPUT NON-ISOLATED WIDE OUTPUT ADJUST POWER MODULE
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

PTH05050WAD Datasheet(HTML) 6 Page - Texas Instruments

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APPLICATION INFORMATION
ADJUSTING THE OUTPUT VOLTAGE
Rset + 10 kW
0.8 V
Vout * 0.8 V
*2.49 kW
(1)
VIN
CIN
100
µF
(Required)
COUT
100
µF
(Optional)
GND
VOUT
RSET
1 %
0.1 W
PTH05050W
1
6
3
4
2
Track
V IN
VO
GND
Inhibit
5
PTH05050W
SLTS213D – MAY 2003 – REVISED JUNE 2007
The Vo Adjust control (pin 5) sets the output voltage to value higher than 0.8 V. The adjustment range of the
PTH05050W is from 0.8 V to 3.6 V. The adjustment method requires the addition of a single external resistor,
RSET, that must be connected directly between the VOAdjust 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 5 shows the placement of the required
resistor.
Table 1. Values of RSET for Standard Output Voltages
VO (Standard) (V)
RSET (Standard Value) (kΩ)
VO (Actual) (V)
3.3
0.698
3.309
2.5
2.21
2.502
2
4.12
2.010
1.8
5.49
1.803
1.5
8.87
1.504
1.2
17.4
1.202
1
36.5
1.005
0.8
Open
0.8
Figure 5. VO Adjust Resistor Placement
NOTES:
1. A 0.05-W 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 pins
5 and 1 using dedicated PCB traces.
2. Never connect capacitors from VOAdjust to either GND or VO. Any capacitance added to the VOAdjust pin
will affect the stability of the regulator.
6
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