NCP5425DB datasheet(5/22 Pages) ONSEMI

Part #	NCP5425DB

Description	Dual Synchronous Buck Controller

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Manufacturer	ONSEMI [ON Semiconductor]

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NCP5425

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5

ELECTRICAL CHARACTERISTICS (continued) (0

°C < TJ < 125°C; ROSC = 30.9 k, CCOMP1,2 = 0.1 mF, 4.75 V < VCC

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

Characteristic

Test Condition

Min

Typ

Max

Unit

OSCILLATOR

Switching Frequency

ROSC = 61.9 k; Measure GATE(H)1

112

150

188

kHz

Switching Frequency

ROSC = 30.9 k; Measure GATE(H)1

224

300

376

kHz

Switching Frequency

ROSC = 11.8 k; Measure GATE(H)1

562

750

938

kHz

ROSC Voltage

ROSC = 30.9 k

0.970

1.000

1.030

V

Phase Difference

−

180

−

°

Low Noise Disable

Guaranteed By Design

−

3.1

3.5

V

OVERCURRENT PROTECTION

OVC Comparator Offset Voltage

0 V < IS+1(2) < 5.5 V

0 V < IS−1(2) < 5.5 V

55

70

85

mV

IS+1(2) Bias Current

IS−1(2) Bias Current

0 V < IS+1(2) < 5.5 V

0 V < IS−1(2) < 5.5 V

−1.0

0.1

1.0

mA

OVC Common Mode Range

−

0

−

5.5

V

SUPPLY CURRENTS

VCC Current

COMP = 0 V (No Switching)

−

16

22

mA

BST Current

COMP = 0 V (No Switching)

−

3.5

6.0

mA

UNDERVOLTAGE LOCKOUT

Start Threshold

GATE(H) Switching; COMP1(2) Charging

3.8

4.2

4.6

V

Stop Threshold

GATE(H) Not Switching; COMP1(2) Discharging

3.6

4.0

4.4

V

Hysteresis

Start−Stop

0.1

0.2

0.45

V

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