VIPER20B datasheet(5/17 Pages) STMICROELECTRONICS

5 / 17 page

ELECTRICAL CHARACTERISTICS (continued)

ERROR AMPLIFIER SECTION

Symb ol

Parameter

Test Cond ition s

Mi n.

Typ .

Max.

Un it

VDDreg

VDD Regulation Point

ICOMP = 0 mA

(see fig. 1)

12. 61313.4

∆VDDreg

Total Variation

TJ = 0 to 100

oC2

GBW

Unity G ain Bandwidt h

From Input = VDD to Output = VCOMP

CO MP pin is open (see fig. 8)

150

KHz

AVOL

Open Loop Voltage

Gain

CO MP pin is open (see fig. 8)

TBD

DC T ransconductance

VCOMP = 2.5 V

(see fig. 1)

TBD

1.5

T BD

mA/V

VCOMPL O

Output Low Level

ICOMP =-400

µAVDD =14 V

0.2

VCOMPHI

Output High Level

ICOMP =400

µAVDD =12 V

4.5

ICOMPLO

Output Low Current

Capabilit y

VCOMP =2.5 V

VDD =14 V

-600

µA

ICOMPHI

Output High Current

Capabilit y

VCOMP =2.5 V

VDD = 12 V

600

µA

PWM COMPARATOR SECTION

Symb ol

Parameter

Test Cond ition s

Mi n.

Typ .

Max.

Un it

HID

∆VCOMP/∆IDpeak

VCOMP = 1 to 3 V

TBD

2.3

T BD

V/A

VCOMPoff

VCOMP offset

IDp eak =10 mA

0.5

IDpeak

Peak Current Limit ation VDD = 12 V

COMP pin open

1. 3

T BD

Current Sense Delay

to turn-off

ID = 0. 4 A

250

Blanking Time

300

SHUTDOWN AND OVERTEMPERATURE SECTION

Symb ol

Parameter

Test Cond ition s

Mi n.

Typ .

Max.

Un it

VCOMPth

Restart threshold

(see fig. 4)

0.5

tDISsu

Disable Set Up T ime

(see fig. 4)

1.7

µs

Ttsd

Thermal Shutdown

Temperature

(see fig. 6)

140

160

Thyst

Thermal Shutdown

Hysteresis

(see fig. 6)

VIPer20B / VIPer20BSP

5/17

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