PM8804TR datasheet(10/27 Pages) STMICROELECTRONICS

10 / 27 page

Electrical specifications

PM8804

10/27

DocID031629 Rev 1

Soft-start / soft-stop

TSS

Soft-start time

CSS = 33 nF; over CTL full

range (0.7 V to 1.7 V)(3)

-16.5

ISS_PRECHARGE

Soft-start pre-charge

current

From SS = 0 V to SS = 0.7 V

A

TSS_PRECHARGE

Soft-start pre-charge

delay

From SS = 0 V to SS = 0.7 V;

CSS = 33 nF(3)

-2.3

ISS_CHARGE

Soft-start

charge/discharge

current

For SS > 0.7 V

1.3

2.7

A

ISS_DISCHARGE

Soft off discharge

current

From CTL set point to 0.7 V

6.5

13.5

A

Blanking time BLK

Blanking time

RBLK = 20 k

-15

RBLK = 390 k(3)

195

BLK voltage

1.20

1.25

1.30

Current limit CS

Delay to output

(3)

-20

OC1TH

Cycle by cycle current

Limit threshold voltage

0.22

0.25

0.28

OC2TH

4-times retry current

Limit threshold voltage

0.32

0.35

0.38

Slope compensation

peak current

Sourced by CS pin at 80% duty

cycle

21.5

µA

PWM comparator CTL

Delay to output

Guaranteed by design

Minimum duty cycle

CTL = 0, CS = 0

Maximum duty cycle

CTL = 2 V, CS = 0,

FOSC = 250 kHz

CTL to PWM gain

(3)

-1:4

CTL operative range

(3)

0.7

1.7

Internal CTL pull-up

resistance

To internal 3V3 ref. voltage

3.3

3.8



Table 5. Electrical characteristic(1) (continued)

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

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