L99VR02XP datasheet(29/50 Pages) STMICROELECTRONICS

29 / 50 page

•

“OR” mode (TC_CONF = VS_LDO1): two clusters are linked to each other;

–

If LDO1 is in thermal shutdown, LDO2 also is switched off.

–

If LDO2 is in thermal shutdown, LDO1 keeps the normal activity.

•

”DEFAULT” mode (TC_CONF = GND): only the cluster which reached protection temperature is switched

off;

–

LDO1 and LDO2 are fully independent of each other and monitored by two different thermal clusters.

–

In tracking mode: if LDO1 is in thermal shutdown and TRK_MODE = GND (see the Table 19), LDO2

is untied by LDO1 and keeps the normal activity.

Figure 47. Thermal clusters identification

CURRENT LIMITER

POWER DRIVER

START - UP

VS_LDO1

E N _LDO2

SEL3 _LDO2

SEL2 _LDO2

VO_LDO1

SEL1 _LDO2

Ishort_LDO2

VS_LDO2

VO_LDO2

OUTPUT

VOLTAGE

SELECTOR

THERMAL

CURRENT LIMITER

VOLTAGE

REFERENCE

POWER DRIVER

START - UP

E N _LDO1

SEL3 _LDO1

SEL2 _LDO1

SEL1 _LDO1

Ishort_LDO1

LOW VOLTAGE RESET

LOGIC DRIVER

WATCHDOG

ADVANCED THERMAL WARNING

TW _LDO1

Vcw_LDO1

Wi_LDO1

LOW VOLTAGE RESET

TW _LDO2

TC _ CONF

RST_LDO1

RST_LDO2

GND

Vcr_LDO2

Vcr_LDO1

WATCHDOG

Vcw_LDO2

Wi_LDO2

R FD = 75

OV Detectio n

on Vo_LDO1

VOLTAGE

REFERENCE

SHUTDOWN

THERMAL

SHUTDOWN

TRK_MODE

IN_TRK

R FD = 75

TRK_STAT

L99VR02XP

Application information

DS14686 - Rev 1

page 29/50

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