LP3918TLSLASHNOPB datasheet(19/38 Pages) TI2

Part #	LP3918TL/NOPB

Description	LP3918 Battery Charge Management and Regulator Unit

PDF	38 Pages

Scroll/Zoom	100%

Manufacturer	TI2 [Texas Instruments]

Direct Link	https://www.ti.com

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19 / 38 page

LDO2 - 7

PS_HOLD

LDO1

If PS_HOLD is low 35 ms after initially going low,

then LDO2-7 are shutdown

LDO1 is shutdown 40 Ps after other

LDO's are shutdown

35 ms

40 Ps

RESET

CHG_IN

HF_PWR

PS_HOLD

LDO1

LDO2

320 ms

87%

87% Reg

PS_HOLD needs to be asserted within 1200 ms

after HF_PWR, or CHG_IN rising edge has been

detected.

If charger is connected (CHG_IN) or HF_PWR is

applied, then both events are filtered for 320 ms

before enabling LDO1

60 ms

1.2s

If no enabling signal is high on

the rising edge of PS_HOLD,

shutdown will occur.

RESET

200 Ps

Either HF_PWR or CHG_IN will enable LDO1

LP3918

www.ti.com

SNVS476D – AUGUST 2007 – REVISED MAY 2013

Figure 6. LP3918 Power On Behaviour (Failed PS_Hold)

Figure 7. LP3918 Normal Shutdown Behaviour

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LP3918TL/NOPB Datasheet(PDF) 19 Page - Texas Instruments