L9001 datasheet(17/38 Pages) STMICROELECTRONICS

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DS12089 Rev 2

17/38

L9001

Power supply

Table 10. VDD2 regulator parameters

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

VR2

Nominal output voltage -

0.8

Iload2

Output current

Application info, Buck

Iload2_lin

Application info, LDO

0.3

dVSR2_ac

Line transient

response(1)

Not tested, guaranteed by

design, Buck, SR < 1 V/μs

-8

dVSR2_ac_lin

Not tested, guaranteed by

design, LDO, SR < 1 V/μs

-5

dVLR2_ac

Load transient

response(1)

Not tested, guaranteed by

design, Buck , VR2 < 2.5 V, 0.4

A > Iload2 > ILIM_BP2,

dt = 10 μs

-8

Not tested, guaranteed by

design, Buck, VR2 ≥ 2.5 V,

Iload2 > ILIM_BP2, dt = 10 μs

-8

dVLR2_ac_lin

Not tested, guaranteed by

design, LDO, Iload2 > ILIM_BP2,

dt = 10 μs

-8

Ilim2

Current limitation

2.2

2.8

Ilim2_lin

0.3

FB2

Feedback reference

voltage

1 A > Iload2 Buck > ILIM_BP2

0.776

0.8

0.824

0.3 A > Iload2 LDO > ILIM_BP2

0.776

0.8

0.824

Rfb2UP

Feedback resistor

Application info

100

kΩ

FB2_byp

Feedback reference

voltage in bypass

mode

Iload2 < ILIM_BP2

0.788

0.812

0.836

SwFreq2

Switching frequency

465

KHz

RDSon2

High side RDSon

0.5

SS2

Soft start control

Buck (20%-80% of VR2)

V/ms

LDO (20%-80% of VR2)

10.5

V/ms

ICMP2_l

LPM current-low

threshold

-3

ICMP2_h

LPM current

-high

threshold

ILIM_BP2

Bypass LDO current

limitation

183045

Cout2

Capacitor at VR2

Buck, VR2 < 2.5 V, Application

info

-47-

μF

Buck, VR2 ≥ 2.5 V, Application

info

-22-

μF

LDO, Application info

μF

Lout2

Inductor at VR2

VR2 < 2.5 V

μH

VR2 ≥ 2.5 V

μH

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