NCP1400ASN27T1 datasheet(3/16 Pages) ONSEMI

Part #	NCP1400ASN27T1

Description	100mA, Fixed Frequency PWM Step-Up Micropower Switching Regulator

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NCP1400A

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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 x 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 x 0.96)

DMAX

68

75

82

%

Minimum Start−up Voltage (IO = 0 mA)

Vstart

−

0.8

0.95

V

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

DVstart

−

−1.6

−

mV/

°C

Minimum Operation Hold Voltage (IO = 0 mA)

Vhold

0.3

−

V

Soft−Start Time (VOUT u 0.8 V)

tSS

0.5

2.0

−

ms

LX (PIN 5)

LX Pin On−State Sink Current (VLX = 0.4 V)

Device Suffix:

19T1

22T1

25T1

27T1

30T1

33T1

38T1

45T1

50T1

ILX

80

100

90

120

125

130

135

145

155

160

−

mA

Voltage Limit (VOUT = VCE = VSET x 0.96, VLX “L’’ Side)

VLXLIM

0.65

0.8

1.0

V

Off−State Leakage Current (VLX = 5.0 V, TA = −40°C to 85°C)

ILKG

−

0.5

1.0

mA

CE (PIN 1)

CE Input Voltage (VOUT = VSET x 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

5. VSET means setting of output voltage.

6. CE pin is integrated with an internal 150 nA pull−up current source.

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