LP87322ESLASHF datasheet(30/75 Pages) TI1

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Time

Voltage

VOUTx

350mV

Time

Current

ILIMx

INT_BUCK(BUCKx_ILIM_INT)

20Ps

nINT

BUCK_STAT(BUCKx_STAT)

Resistive

pull-down

Regulator disabled

by digital

Host clearing the interrupt by writing to flags

New startup if

enable is valid

1ms

INT_BUCK(BUCKx_SC_INT)

LP87322B-Q1, LP87322D-Q1, LP87322E-Q1, LP87322F-Q1

SNVSAC5 – SEPTEMBER 2017

www.ti.com

Product Folder Links: LP87322B-Q1 LP87322D-Q1 LP87322E-Q1 LP87322F-Q1

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Figure 16. Buck Regulator Overload Situation

The LDO regulators include also current limit circuitry. If the load current is increased so that the current limit is

triggered, the regulator limits the output current to the threshold level. The voltage may decrease if the load

current is higher than the current limit. If the current regulation continues for 20 µs, the LP87322B/D/E/F-Q1

device sets the LDOx_ILIM_INT bit in INT_LDO register and pulls the nINT pin low. The host processor can read

LDOx_ILIM_STAT bits in LDO_STAT register to see if the regulator is still in current regulation mode and the

interrupt is cleared by writing 1 to LDOx_ILIM_INT bit. The current limit interrupt can be masked by setting

LDOx_ILIM_MASK bit in LDO_MASK register to 1. The LDO overload situation is shown in Figure 17.

LP87322E/F Datasheet(PDF) 30 Page - Texas Instruments