Application Notes

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PT6510 Series

Adjusting the Output Voltage of the

PT6510 5V/3.3V Bus Converters

The output voltage of the PT6510 series switching regula-

tors may be adjusted higher or lower than the factory

trimmed pre-set voltage with the addition of a single

external resistor. Table 4-1 gives the allowable adjust-

Adjust Up:

An increase in the output voltage is obtained

GND (pins 7-10).

Adjust Down:

Refer to Figure 4-1 and Table 4-2 for both the placement and

Notes:

location. Place the resistor as close to the ISR as

possible.

the ISR.

3. If the remote sense feature is used, connecting the

(pin 1) can benefit load regulation.

4. The minimum input voltage required by the part is

higher.

Figure 4-1

also be calculated using the following formulae.

=

=

Table 4-1

PT6510 ADJUSTMENT AND FORMULA PARAMETERS

Series Pt #

PT6515

PT6512

PT6516

PT6513

PT6511

PT6514

1.2

1.5

1.8

2.5

3.3

3.6

1.14

1.27

1.4

1.8

2.25

2.5

2.35

2.65

2.95

3.5

4.2

4.3

Ω

Ω

Ω

Ω

Ω)

2.49

2.49

2.49

4.99

12.1

10

Ω

Ω

Ω

Ω

Ω)

2

2

2

4.22

12.1

12.1

3.1

3.1

3.1

4.5

4.5

4.5

C

in

+

C

out

+

(R1)

Adj Down

R2

Adjust Up

V

out

COM

Vin

COM

PT6510

11–13

14

7–10

4–6

V

in

V

out

GND

V

STBY

3

V

1

L

O

A

D