L9788 datasheet(75/264 Pages) STMICROELECTRONICS

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DS12308 Rev 4

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L9788

Multi-voltage regulator supplies

263

6.5

VDD5 linear regulator with external MOSFET

VDD5 voltage is generated by a linear controller with internal pre-driver and external MOS

FET.

Electrical characteristics are available in Table 34 and Table 35. VB_IN_OV fault can trigger

the turn OFF of VDD5 regulator, as specified into reset matrix. This effect can be masked

with bit VB_IN_OV_RST_EN in CONFIG_REG 12.

VB_IN_UV fault triggers the turn OFF of VDD5 regulator, as specified into reset matrix. This

effect can be masked with bit VDD5_OFF_SEL in CONFIG_REG 11.

VDD5_OV fault has effects into the device specified into reset matrix. These effects can be

masked with bit VDD5_OV_RST_EN in CONFIG_REG 12.

Conditions:

5.5 V< VB_IN_SW ≤ 18 V, 5.5 V < VB_IN ≤ 18 V, Tj -40 to 175°C unless otherwise specified.

Table 34. VDD5 linear controller pre-driver electrical characteristics

Symbol

Parameter

Test condition

Min

Typ

Max

Unit

VVDD5

5 V regulated

voltage including

static load / line

regulation

Iload = 10 mA, 1 A

4.9

5.1

VDD5_IN

SRp-up_VDD5

Output voltage

slew rate at

power-up

Cvdd5 = 10 µF; from

VDD5*10% to VDD5*90%

V/ms

VDD5_IN

IVDD5

Controller

stability over

VDD5 output

current range

VDD5_IN

Vline_VDD5

Line regulation

voltage

5.6 V < VPre < 18 V Iload

10mA, 1A Cvdd5 = 10 µF (1)

-25

VDD5_IN

Vload_VDD5

Load regulation

voltage

VPre 5.6 V, 18 V 10 mA <

Iload < 1 A Cvdd5 = 10 µF (1)

-25

VDD5_IN

Vline_VDD5_tran

Line transient



regulation

voltage

Vpre from 5.6 V to 7 V by 1 µs

Iload = 10 mA, 800 mA



Cvdd5 =10µF Ext MOS

STD20NF06L Guaranteed by

design (1)

300

VDD5_IN

Vload_VDD5_tran

Load transient

regulation

voltage

VPre = 6 V Iload from 10 mA

to 800 mA by 1.5us

Cvdd5=10µF Ext MOS

STD20NF06L Guaranteed by

design (1)

280

VDD5_IN

Vdrift_Vdd5

Total VDD5

voltage aging drift

-0.8

0.8

VDD5_IN

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