PM8908 datasheet(10/28 Pages) STMICROELECTRONICS

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Electrical specifications

PM8908

10/28

DocID027688 Rev 3

4.2

Electrical characteristics

VCC = 5.0 V ± 5%, TA = 25 °C (unless otherwise specified).

Table 5. Electrical characteristics

Symbol

Parameter

Test conditions

Min. Typ. Max.

Unit

Supply current and undervoltage lockout

IIN

VIN shutdown current

Shutdown, EN = 0 V

0.3

A

ICC

VCC supply current

EN = H, VBOOT = 4.5 V, VCC = 4.5 V,

VIN = 3.5V, VM = GND

23.6

ICCSD

VCC shutdown current

Shutdown, EN = 0 V

A

IBSS

Boot input current

VBOOT = 9 V, VPHASE = 3.5 V,

VCC = 5.5 V

150

A

VCC

VCC supply voltage

4.5

5.0

5.5

VCC UVLO

VCC turn-on

VCC rising

4.2

4.37

4.5

Hysteresis

440

REF UVLO

VREF turn-on

REF rising

1.8

Hysteresis

100

Oscillator, off-time and on-time

fSW

Oscillator accuracy

RM = 100 k

MHz

RM = 47 k

0.6

tOFF-min

Minimum off-time

VIN = 1.5 V, VOUT = 0.9 V, VREFIN = 1 V,

fSW = 1 MHz / 0.6 MHz

170

Reference and GM amplifier

VOUT

Output voltage accuracy

VREFIN = 1 V, no droop

-1

VREF

Voltage reference

IREF = 0

1.95

2.0

2.05

Transconductance(1)

1.00

ICSK

COMP pin maximum sinking

current

VCOMP = 2 V, VREFIN - VOUT = -80 mV

A

ICSR

COMP pin maximum sourcing

current

VCOMP = 2 V, VREFIN - VOUT = 80 mV

-80

A

VCM

Common mode input voltage

range(1)

VDM

Differential mode input voltage

range(1)

080

VOSet

Input offset

F-3dB

-3 dB frequency(1)

4.5

6.0

7.5

MHz

ACS

Current sense gain

Gain from the current of the LS to PWM

comp when PWM = OFF

mV/A

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