L9678P datasheet(178/203 Pages) STMICROELECTRONICS

178 / 203 page

Electrical characteristics

L9678P, L9678P-S

178/203

DocID029274 Rev 3

15.14

VSUP regulator

All electrical characteristics are valid for the following conditions unless otherwise noted.

-40 °C

 Ta  +95 °C, VINGOOD2(max)  VIN  35 V.

Table 41. VSUP regulator DC specifications

N°

Symbol

Parameter

Condition

Min

Typ

Max

Unit

1VO_VSUP

Output voltage

Across all line and load,

steady state

6.5

6.8

7.1

2IO_BVSUP

Base driver current limit

3IO_VSUP

Output load current

0.5

200

4dVSR_ac

Line transient response

All load IO_VDD5;

VIN = 6 V to 18 V @ dt = 1 µs;

Design Info

6.2

7.4

5dVLR_ac

Load transient response

All line;

IO_VDD5= 1mA to 100mA @dt = 1µs;

Design Info

6.2

7.4

VSUPOV

Over voltage detection

7.6

VSUPUV

Under voltage detection

1.8

2.2

Table 42. VSUP AC specifications

N°

Symbol

Parameter

Condition

Min

Typ

Max

Unit

1TSOFTST_VSUP Soft start time

From 10% to 90%

2TFLT_VSUPOV

Over voltage

deglitch filter time

-27

µs

3TFLT_VSUPUV

Under voltage

deglitch filter time

-27

µs

Table 43. VSUP regulator external components (Design Info)

N°

Symbol

Component

Conditions

Min

Typ

Max

Unit

1hFE_PNP

Output transistor gain

250

500

A/A

2Ft_PNP

Output transistor

transit frequency

-30

MHz

3RVSUPBE

Output transistor Base-

Emitter

Pull-up Resistance

kΩ

4CBLK_VSUP

Output Bulk Capacitance

Min 4.7µF nominal

µF

ESRCBLK_VSUP Bulk Capacitor ESR

mΩ

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