Power dissipation depends on input voltage and load conditions. Power dissipation (PD) is equal to the product

of the output current multiplied by the voltage drop across the output pass transistor (VIN to VOUT). The following

equation calculates power dissipation (PD).

(

)

D

IN

OUT

OUT

P

V

V

I

=

-

´

(6)

Minimize power dissipation by using the lowest possible input voltage necessary to provide the required output

voltage.

7.4.2 Layout Examples

NR/FB

EN

1

2

3

4

8

7

6

5

GND PLANE

GND PLANE

CIN

COUT

R

1

R

2

C

FF

N/C

N/C

N/C

VOUT

VIN

TPS73601DRB

Figure 7-7. Adjustable Output Voltage Option Layout (DRB Package)

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TPS737-Q1

SBVS123C – DECEMBER 2008 – REVISED MARCH 2025

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