VNI8200XP-32 datasheet(16/43 Pages) STMICROELECTRONICS

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Electrical characteristics

VNI8200XP-32

16/43

DocID027849 Rev 3

5.6

Step-down switching regulator

10.5 V < VCC < 36 V; -40 °C < TJ < 125 °C; unless otherwise specified

Table 10: Step-down switching regulator

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

VDC_out

Regulated output voltage

IREG from 0 to 100 mA

VREG 3.3 V, see Figure

10: "Typical circuit for

switching regulation

VDC-out = 3.3 V"

3.1

3.3

3.5

IREG from 0 to 100 mA

VREG 5 V, see Figure 11:

"Typical circuit for

switching regulation

VDC-out = 5 V"

VFB

Voltage feedback

3.1

3.3

3.5

RDS(on)

MOSFET on-resistance

1.5

Ilim

Limitation current

0.55

0.9

Iqop

Total operating quiescent

current

0.6

Iqst-by

Total standby quiescent

current

Regulator standby

15.8

µA

Switching frequency

400

kHz

Dmax

Maximum duty cycle

80%

Tonmin

Minimum on-time

150

fsc

Frequency in short-circuit

condition

kHz

5.7

LED driving array

10.5 V < VCC < 36 V; -40 °C < TJ < 125 °C; unless otherwise specified

Table 11: LED driving array

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

VCOL

Output source

voltage on COL

pins

Output current 0

to 7 mA

VREG-0.3

VREG-0.2

VROW

Open drain voltage

on ROW pins

Output current 0

to 15 mA

0.2

0.3

Fsw

Row refresh

frequency with

duty=25%

780

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