L6566B datasheet(41/51 Pages) STMICROELECTRONICS

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L6566B

Application information

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5.14

Summary of L6566B power management functions

It has been seen that the device is provided with a number of power management functions:

multiple operating mode upon loading conditions and protection functions. To help the

designer familiarize with these functions, in the following tables all of theme are summarized

with their respective activation mechanism and the resulting status of the most important

pins. This can be useful not only for a correct use of the IC but also for diagnostic purposes:

especially at prototyping/debugging stage, it is quite common to bump into unwanted

activation of some function, and these tables can be used as a sort of quick troubleshooting

guide.

Table 6. L6566B light load management features

Feature Description

Caused

behavior

Vcc_restart

(V)

Consump.

(Iqdis,mA)

VREF

(V)

VCOMP

(V)

OSC

(V)

FMOD

Burst

mode

Controlled

ON-OFF

operation for

low power

consumptio

n at light

load

VCOMP <

VCOMPBM -

Hys

Pulse

skipping

operation

N.A.

1.34mA

uncha

nged

VCOMPB

M-HYS to

VCOMPB

0/1

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