NCP1450ASN27T1 datasheet(4/22 Pages) ONSEMI

Part #	NCP1450ASN27T1

Description	PWM Step?뭫p DC?묭C Controller

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Manufacturer	ONSEMI [ON Semiconductor]

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NCP1450A

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ELECTRICAL CHARACTERISTICS (For all values TA = 25°C, unless otherwise noted.)

Characteristic

Symbol

Min

Typ

Max

Unit

OSCILLATOR

Frequency (VOUT = VSET

0.96, Note 5)

fOSC

144

180

216

kHz

Frequency Temperature Coefficient (TA = −40°C to 85°C)

Df

−

0.11

−

%/

°C

Maximum PWM Duty Cycle (VOUT = VSET

0.96)

DMAX

70

80

90

%

Minimum Startup Voltage (IO = 0 mA)

Vstart

−

0.8

0.9

V

Minimum Startup Voltage Temperature Coefficient (TA = −40°C to 85°C)

DVstart

−

−1.6

−

mV/

°C

Minimum Operation Hold Voltage (IO = 0 mA)

Vhold

−

0.6

0.7

V

Soft−Start Time (VOUT = VSET, Note 6)

tSS

−

100

250

ms

CE (PIN 1)

CE Input Voltage (VOUT = VSET

0.96)

High State, Device Enabled

Low State, Device Disabled

VCE(high)

VCE(low)

0.9

−

0.3

V

CE Input Current (Note 6)

High State, Device Enabled (VOUT = VCE = 5.0 V)

Low State, Device Disabled (VOUT = 5.0 V, VCE = 0 V)

ICE(high)

ICE(low)

−0.5

0

0.15

0.5

mA

EXT (PIN 5)

EXT “H” Output Current (VEXT = VOUT −0.4 V)

Device Suffix:

19T1

27T1

30T1

33T1

50T1

IEXTH

−

−25.0

−35.0

−37.7

−40.0

−53.7

−20.0

−30.0

−35.0

mA

EXT “L” Output Current(VEXT = 0.4 V)

Device Suffix:

19T1

27T1

30T1

33T1

50T1

IEXTL

20.0

30.0

35.0

38.3

48.0

50.8

52.0

58.2

−

mA

TOTAL DEVICE

Output Voltage

Device Suffix:

19T1

27T1

30T1

33T1

50T1

VOUT

1.853

2.633

2.925

3.218

4.875

1.9

2.7

3.0

3.3

5.0

1.948

2.768

3.075

3.383

5.125

V

Output Voltage Temperature Coefficient (TA = −40 to +85°C)

DVOUT

−

150

−

ppm/

°C

Operating Current (VOUT = VCE = VSET

0.96, Note 5)

Device Suffix:

19T1

27T1

30T1

33T1

50T1

IDD

−

55

93

98

103

136

90

140

150

160

220

mA

Standby Current (VOUT = VCE = VSET +0.5 V)

ISTB

−

15

20

mA

Off−State Current (VOUT = 5.0 V, VCE = 0 V, TA = −40 to +85°C, Note 7)

IOFF

−

0.6

1.5

mA

5. VSET means setting of output voltage.

6. This parameter is guaranteed by design.

7. CE pin is integrated with an internal 150 nA pullup current source.

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