NCP5424D datasheet(5/20 Pages) ONSEMI

Part #	NCP5424D

Description	Dual Synchronous Buck Controller with Input Current Sharing

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Manufacturer	ONSEMI [ON Semiconductor]

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NCP5424

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5

ELECTRICAL CHARACTERISTICS (continued) (0

°C < TA < 70°C; 0°C < TJ < 125°C; ROSC = 30.9 k, CCOMP1,2 = 0.1 µF,

10.8 V < VCC < 13.2 V; 10.8 V < BST < 20 V, CGATE(H)1,2 = CGATE(L)1,2 = 1.0 nF, VFB+2 = 1.0 V; unless otherwise specified.)

Characteristic

Unit

Max

Typ

Min

Test Conditions

Oscillator

Switching Frequency

ROSC = 61.9 k; Measure GATE(H)1; Note 3

112

150

188

kHz

Switching Frequency

ROSC = 30.9 k; Measure GATE(H)1

250

300

350

kHz

Switching Frequency

ROSC = 15.1 k; Measure GATE(H)1; Note 3

450

600

750

kHz

ROSC Voltage

ROSC = 30.9 k, Note 3

0.970

1.000

1.030

V

Phase Difference

-

180

-

°

Supply Currents

VCC Current

COMP1,2 = 0 V (No Switching)

-

13

17

mA

BST Current

COMP1,2 = 0 V (No Switching)

-

3.5

6.0

mA

Undervoltage Lockout

Start Threshold

GATE(H) Switching; COMP1,2 charging

7.8

8.6

9.4

V

Stop Threshold

GATE(H) not switching; COMP1,2 discharging

7.0

7.8

8.6

V

Hysteresis

Start-Stop

0.5

0.8

1.5

V

Hiccup Mode Overcurrent Protection (Controller 1)

OVC Comparator Offset Voltage

0 V < IS+ 1 < 5.5 V, 0 V < IS- < 5.5 V

55

70

85

mV

Discharge Threshold

-

0.20

0.25

0.30

V

IS+ 1 Bias Current

0 V < IS+ 1 < 5.5 V

-1.0

0.1

1.0

µA

IS- Bias Current

0 V < IS- < 5.5 V

-2.0

0.2

2.0

µA

OVC Common Mode Range

-

0

-

5.5

V

OVC Latch COMP1 Discharge Current

COMP1 = 1.0 V

2.0

5.0

8.0

µA

Cycle-to-Cycle Current Limit (Controller 2)

OVC Comparator Offset Voltage

0 V < IS+ 2 < 5.5 V, 0 V < IS- < 5.5 V

55

70

85

mV

IS+ 2 Bias Current

0 V < IS+ 2 < 5.5 V

-1.0

0.1

1.0

µA

OVC Common Mode Range

-

0

-

5.5

V

OVC Latch COMP2 Discharge Current

COMP = 1.0 V

0.3

1.2

3.5

mA

3. Guaranteed by design, not 100% tested in production.

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