LP87702 datasheet(34/98 Pages) TI

No. de pieza	LP87702

Descripción Electrónicos	LP87702 Dual Buck Converter and 5-V Boost With Diagnostic Functions

PDF	98 Pages

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Fabricante Electrónico	TI [Texas Instruments]

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34 / 98 page

The source for the fault can be read from PGx_FAULT register when PGx signal becomes inactive. If the invalid

output voltage becomes valid again the PGx signal becomes active. Thus the PGx signal shows all the time if

the monitored output voltages are valid. Figure 7-11 shows an example of the PGx pin operation in continuous

mode.

The PGx signal can also be configured so that it maintains the inactive state even when the monitored outputs

are valid, but there are PG_FAULT_x bits pending clearance. This type of operation is selected by setting the

PGOOD_FAULT_GATES_PGx bit to 1.

V(VANA)

VANA_UVLO

State

Shut

down

Read

OTP

Standby

PGx pin

VOUT (Buck1)

VOUT (Boost)

Powergood (Buck1)

Powergood (Boost)

Active

EN (Buck1)

EN (Boost)

4ms

2ms

Figure 7-11. PGx Pin Operation in Continuous Mode

7.3.10.3.3 Summary of PG0, PG1 Gated, and Continuous Operating Modes

Table 7-6 summarizes the PGx behavior in different application scenarios, for the gated and continuous

operating modes.

LP87702

SNVSBU3 – MARCH 2021

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LP87702 Datasheet(PDF) 34 Page - Texas Instruments