PM8908 datasheet(11/28 Pages) STMICROELECTRONICS

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DocID027688 Rev 3

11/28

PM8908

Electrical specifications

Soft-end

RDS

Phase discharge resistance



Overcurrent protection

IOCL

Positive overcurrent threshold

LS sourcing, RM = 47 k

47.6

IOCLN

Negative overcurrent threshold LS sourcing, RM = 47 k

-11

- 7.6

- 4

Bootstrap switch

RBSS

Boot switch on-resistance

IBOOT = 10 mA, TA = 25 °C



Over and undervoltage protection

OVP

OVP threshold

VOUT rising

117

120

123

VREFIN

tOVPd

OVP delay

Time from the VOUT pinout of + 20% of

REFIN to OVP fault

s

UVP

UVP threshold

VOUT falling

VREFIN

tUVPd

UVP delay

Time from the VOUT pinout of -30% of

REFIN to UVP fault

256

s

Undervoltage fault enable

delay

Time from EN = H to undervoltage ready

2.4

External tracking

Time from EN = H to undervoltage ready

9ms

Overtemperature protection

OTP

Thermal shutdown threshold(1)

145

°C

Thermal shutdown

hysteresis(1)

°C

PGOOD

Upper threshold

VOUT rising

116

VREFIN

Hysteresis

Lower threshold

VOUT falling

Hysteresis

VPGOOD,L

PGOOD voltage low

impedance

IPGOOD_SINK = 4 mA, VCC = 4.5 V

0.3

IPGOOD,H

PGOOD leakage high

impedance

VPGOOD = 5.5 V

A

tPGd

PGOOD startup delay time

External tracking

Time from EN = H to PGOOD high

tPGHd

PGOOD high delay time

Rising edge

0.8

1.2

tPGLd

PGOOD low delay time

Falling edge(2)

s

Table 5. Electrical characteristics (continued)

Symbol

Parameter

Test conditions

Min. Typ. Max.

Unit

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