AN1518 datasheet(21/30 Pages) STMICROELECTRONICS

Part #	AN1518

Description	The L5973D is a step-down monolithic power switching regulator capable

PDF	30 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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21 / 30 page

AN1518

Application information

21/30

Figure 15.

Short-circuit current VIN = 30 V

In Figure 14 and Figure 15, for example, it can be observed that when the input voltage

increases for a given component list, the current peak increases also. The current limit is

immediately triggered but the current peak increases until the current ripple during TOFF is

equal to the current ripple during TON.

9.5

Application circuit

Figure 16 shows the evaluation board application circuit, where the input supply voltage,

VCC, can range from 4.4 V to 25 V due to the voltage rating of the input capacitor, and the

output voltage is adjustable from 1.235 V to VCC.

Figure 16.

Evaluation board application circuit

Table 6.

Component list

Reference

Part number

Description

Manufacturer

GRM32DR61E106KA12L

10 µF, 25 V

Murata

POSCAP 6TPB330M

330 µF, 6.3 V

Sanyo

AN1518 Datasheet(PDF) 21 Page - STMicroelectronics