L9950 datasheet(11/39 Pages) STMICROELECTRONICS

11 / 39 page

L9950 - L9950XP

Electrical specifications

Doc ID 10311 Rev 10

11/39

Table 8.

Overvoltage and under voltage detection

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

VSUV ON VS UV-threshold voltage

VS increasing

5.9

7.2

VSUV OFF VS UV-threshold voltage

VS decreasing

5.5

6.5

VSUV hyst VS UV-hysteresis

VSUV ON - VSUV OFF

-0.5

VSOV OFF VS OV-threshold voltage

VS increasing

24.5

VSOV ON VS OV-threshold voltage

VS decreasing

17.5

VSOV hyst VS OV-hysteresis

VSOV OFF - VSOV ON

-1

VPOR OFF Power-on-reset threshold

VCC increasing

4.4

VPOR ON Power-on-reset threshold

VCC decreasing

3.1

VPOR hyst Power-on-reset hysteresis

VPOR OFF - VPOR ON

-0.3

Table 9.

Current monitor output

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

VCM

Functional voltage range

VCC = 5 V

ICM,r

Current monitor output

ratio:

ICM /IOUT1,4,5,6,11

≤ VCM ≤ 4V, VCC=5V

ICM acc

Current monitor accuracy

≤ VCM ≤ 3.8 V,

VCC = 5 V, IOut,min=500 mA,

IOut4,5,11,max = 5.9 A

IOut1,6,max = 2.9 A

(FS = full scale= 600 µA)

4% +

1%FS

8% +

2%FS

Table 10.

Charge pump output

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

VCP

Charge pump output

voltage

VS = 8 V, ICP = -60 µA

VS = 10 V, ICP = -80 µA

VS ≥ 12 V, ICP = -100 µA

ICP

Charge pump output

current

VCP = VS+10 V, VS =13.5 V

150

300

µA

10.000

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