NCV97310 datasheet(9/25 Pages) ONSEMI

Part #	NCV97310

Description	3 Buck Regulators

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NCV97310

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Table 4. ELECTRICAL CHARACTERISTICS (VBAT = VINL = 4.5 V to 28 V, VEN = VSTBYB = VEN2 = VEN3 = 5 V, VBSTx = VSWx +

3.0 V, CDRV1 = 0.1 mF, CDRV2 = 0.47 mF. Min/Max values are valid for the temperature range −40°C ≤ TJ ≤ 150°C unless noted otherwise,

and are guaranteed by test, design or statistical correlation.)

Parameter

Unit

Max

Typ

Min

Conditions

Symbol

OSCILLATOR

Switching Frequency − switcher 1

fSW1

fSW1(HV)

4.5 < VBAT < 18 V, ROSC = open

20 V < VBAT < 28 V, ROSC = open

1.8

0.9

2.0

1.0

2.2

1.1

MHz

Switching Frequency − switchers 2 & 3

fSW2, fSW3

ROSC = open

1.8

2.0

2.2

MHz

Switching Frequency − ROSC

fROSC

ROSC = 12.5 kW

2.3

2.5

2.8

MHz

ROSC reference voltage

VROSC

ROSC = 25 kW

0.9

1.0

1.1

V

VBAT OVERVOLTAGE SHUTDOWN MONITOR

Overvoltage Stop Threshold

VOV1SP

36

V

Overvoltage Start Threshold

VOV1ST

30

V

Overvoltage Hysteresis

VOV1HY

0.6

1.4

2.4

V

VBAT FREQUENCY FOLDBACK MONITOR

Frequency Foldback Threshold

VFL1U

VFL1D

VBAT rising

VBAT falling

18.4

18

20

19.8

V

Frequency Foldback Hysteresis

VFL1HY

0.2

0.3

0.4

V

SOFT−START

Soft−Start Completion Time

tSS1, tSS2, tSS3

0.8

1.4

2.0

ms

SLOPE COMPENSATION

Ramp Slope (Note 2) – switcher 1

(With respect to switch current)

Sramp1

Sramp1(HV)

4.5 < VBAT < 18 V

20 V < VBAT < 28 V

1.8

0.8

3.4

1.6

A/

ms

Ramp Slope (Note 2) – switchers 2 & 3

Sramp2

1.9

3.7

A/

ms

POWER SWITCH − SWITCHER 1

ON Resistance

RDS1ON

VBST1 = VSW1 + 3.0 V, ISW1 = 500 mA

185

360

m

W

Leakage current VBAT to SW1

ILKSW1

VEN = 0 V, VSW1 = 0, VBAT = 18 V

10

mA

Minimum ON Time

tON1MIN

Measured at SW1 pin

45

70

ns

Minimum OFF Time

tOFF1MIN

Measured at SW1 pin

30

50

70

ns

POWER SWITCHES − SWITCHER 2

High−Side ON Resistance

RHS2ON

VBST2 = VSW2 + 3.0 V,

ISW2 = 500 mA

165

300

m

W

Low−Side ON Resistance

RLS2ON

ISW2 = 500 mA

130

230

m

W

Leakage current high−side switch

ILKSW2

VEN2 = 0 V, VSW2 = 0, VIN2 = 5.5 V

5

mA

Minimum ON Time

tON2MIN

Measured at SW2 pin

60

80

95

ns

Minimum OFF Time

tOFF2MIN

Measured at SW2 pin

35

55

75

ns

Non−overlap time

tNOVLP

10

ns

POWER SWITCHES − SWITCHER 3

High−Side ON Resistance

RHS3ON

VBST3 = VSW3H + 3.0 V,

ISW3H = 500 mA

140

250

m

W

Low−Side ON Resistance

RLS3ON

ISW3L = 500 mA

130

230

m

W

Leakage current high−side switch

ILKSW3

VEN3 = 0 V, VSW3H = 0, VIN3 = 5.5 V

5

mA

Minimum ON Time

tON3MIN

Measured at SW3x pin

60

80

95

ns

Minimum OFF Time

tOFF3MIN

Measured at SW3x pin

35

55

75

ns

Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product

performance may not be indicated by the Electrical Characteristics if operated under different conditions.

2. Not tested in production. Limits are guaranteed by design.

3. Minimum load parameters are only valid for the 5.0 V version, OPN: NCV97310MW50R2G

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