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APPLICATION INFORMATION

ADJUSTING THE OUTPUT VOLTAGE

R

0.69

V

* 1.43 kW

(1)

UDG−06043

1%

0.05 W

+Sense

−Sense

VoAdj

GND

3

4

5

6

7

+Sense

−Sense

GND

PTH04T230/231W

PTH04T230W, PTH04T231W

SLTS271A – SEPTEMBER 2006 – REVISED OCTOBER 2006

PTH04T230/231W is 0.69 V to 3.6 V. The adjustment method requires the addition of a single external resistor,

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 9 shows the placement of the required

resistor.

1.21

3.304

2.37

2.506

4.75

1.807

6.98

1.510

1.2

12.1

1.200

1.0

20.5

1.004

0.7

681

0.700

(1)

(1)

resistor directly between pins 7 and 6, as close to the regulator as possible, using dedicated PCB traces.

(2)

affects the stability of the regulator.

11

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