L6902

Test and application circuit

Doc ID 7332 Rev 9

3/11

1

Test and application circuit

Figure 1.

Test and application circuit

2

Pin connection

Figure 2.

Pin connection

Table 2.

Pin description

N°

Pin

Function

1

OUT

Regular output

2

CS+

Current error amplifier input (current sense at higher voltage)

3

CS-

Current error amplifier input (current sense at lower voltage)

4

COMP E/A output to be used for frequency compensation

5FB

Stepdown feedback input. Connecting directly to this pin results in an output voltage of

1.235 V. An external resistive divider is required for higher output voltages. In this case:

6

VREF

3.3 V VREF. No cap is need for stability.

7

GND

Ground

8

VCC

Unregulated DC input voltage.

V

out

V

FB

1

R1

R2

--------

+

⎝⎠

⎛⎞

⋅

1.235V 1

R1

R2

--------

+

⎝⎠

⎛⎞

==