NCP1442T datasheet(3/20 Pages) ONSEMI

Part #	NCP1442T

Description	4.0 A 280 kHz/560 kHz Boost Regulators

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Manufacturer	ONSEMI [ON Semiconductor]

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ELECTRICAL CHARACTERISTICS (2.7 V < VCC < 30 V; 0°C < TA < 85°C; 0°C < TJ < 125°C; For all NCP1442/3/4/5 specifications

unless otherwise stated.) (See Note 2)

Characteristic

Test Conditions

Min

Typ

Max

Unit

Positive and Negative Error Amplifiers

FB Reference Voltage (NCP1442/4 only)

VC tied to FB; measure at FB

1.246

1.276

1.300

V

NFB Reference Voltage (NCP1443/5 only)

VC = 1.25 V

−2.60

−2.475

−2.40

V

FB Input Current (NCP1442/4 only)

FB = VREF

−1.0

0.1

1.0

mA

NFB Input Current (NCP1443/5 only)

NFB = NVREF

−16

−10

−5.0

mA

FB Reference Voltage Line Regulation

(NCP1442/4 only)

VC = FB

−0.03

0.01

0.03

%/V

NFB Reference Voltage Line Regulation

(NCP1443/5 only)

VC = 1.25 V

−0.05

0.01

0.05

%/V

Positive Error Amp Transconductance

IVC = ± 25 mA

300

550

800

mMho

Negative Error Amp Transconductance

IVC = ± 5.0 mA

115

160

225

mMho

Positive Error Amp Gain

(Note 3)

200

500

−

V/V

Negative Error Amp Gain

(Note 3)

100

180

320

V/V

VC Source Current

FB = 1.0 V or NFB = −1.9 V, VC = 1.25 V

−90

−50

−25

mA

VC Sink Current

FB = 1.5 V or NFB = −3.1 V, VC = 1.25 V

200

460

1500

mA

VC High Clamp Voltage

FB = 1.0 V or NFB = −1.9 V; VC sources 25 mA

1.5

1.64

1.9

V

VC Low Clamp Voltage

FB = 1.5 V or NFB = −3.1 V, VC sinks 25 mA

0.30

0.47

0.70

V

VC Threshold

Reduce VC from 1.5 V until switching stops

0.70

1.05

1.30

V

Oscillator

Base Operating Frequency

NCP1442/3, FB = 1.0 V or NFB = −1.9 V

240

280

320

kHz

Reduced Operating Frequency

NCP1442/3, FB = 0 V or NFB = 0 V

30

68

120

kHz

Maximum Duty Cycle

NCP1442/3

90

96

−

%

Base Operating Frequency

NCP1444/5, FB = 1.0 V or NFB = −1.9 V

480

560

640

kHz

Reduced Operating Frequency

NCP1444/5, FB = 0 V or NFB = 0 V

60

120

160

kHz

Maximum Duty Cycle

NCP1444/5

82

92

−

%

FB Frequency Shift Threshold

Frequency drops to reduced operating frequency

0.36

0.40

0.44

V

NFB Frequency Shift Threshold

Frequency drops to reduced operating frequency

−0.80

−0.68

−0.50

V

Sync/Shutdown

Sync Range

NCP1442/3

−

500

−

kHz

Sync Range

NCP1444/5

−

1000

−

kHz

Sync Pulse Transition Threshold

Rise time = 20 ns

−

2.5

−

V

SS Bias Current

SS = 0 V

SS = 3.0 V

−10

−

−1.0

0.2

−

4.0

mA

Shutdown Threshold

−

0.50

0.85

1.20

V

Shutdown Delay

2.7 V

≤ VCC ≤ 12 V

12 V < VCC ≤ 30 V

12

100

40

500

400

ms

2. For the FR4 suffix parts, production testing is performed at 25

°C and 85°C; limits at 0°C are guaranteed by design.

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

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