DocID028553 Rev 3

5/49

L5963

List of figures

5

List of figures

Figure 1.

Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 2.

Example of a typical application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 3.

Example of usage of two regulators in the same application . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 4.

PowerSSO-36 pinout configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 5.

VQFPN-48 pinout configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Figure 6.

PSRR LDO 50 mA load vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 7.

Efficiency vs. output current (VIN = 14 V, fsw = 2 MHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 8.

Efficiency vs. output current (VIN = 14 V, fsw = 250 kHz) . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 9.

Low voltage warning monitor & delay schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 10.

Linear regulator diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 11.

Enable timing for standby regulator (ENLDO pin connect to supply directly) . . . . . . . . . . . 22

Figure 12.

Enable timing for linear regulator (pin ENLDO isn't connected to VINLDO) . . . . . . . . . . . . 23

Figure 13.

Switching regulators diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Figure 14.

Closed loop system with TYPE III network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Figure 15.

TYPE III compensated network diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Figure 16.

PowerSSO-36 (exposed pad) package outline. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Figure 17.

PowerSSO-36 (slug-up) package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Figure 18.

VFQFPN-48 (7x7x1.0 - opt. D) package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Figure 19.

PowerSSO-36 (exp. pad) marking information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Figure 20.

PowerSSO-36 (slug up) marking information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Figure 21.

VFQFPN-48 (7x7x1.0) marking information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47