NCP1403_05 datasheet(4/18 Pages) ONSEMI

Part #	NCP1403

Description	15 V/50 mA PFM Step?뭊p DC?묭C Converter

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Manufacturer	ONSEMI [ON Semiconductor]

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NCP1403

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ELECTRICAL CHARACTERISTICS (V

OUT = 15 V, TA =25

°C, for min/max values unless otherwise noted.)

Characteristic

Symbol

Min

Typ

Max

Unit

ON/OFF TIMING CONTROL

Minimum Off Time (VDD = 3.0 V, VFB = 0 V)

toff

0.8

1.3

1.5

ms

Maximum On Time (Current not asserted)

ton

4.0

6.0

8.4

ms

Maximum Duty Cycle

DMAX

75

83

91

%

Minimum Startup Voltage (IOUT = 0 mA)

Vstart

−

1.3

1.8

V

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

DVstart

−

1.6

−

mV/

°C

Minimum Supply Voltage (IOUT = 0 mA)

Vhold

−

1.2

1.7

V

Soft−Start Time

tSS

0.5

10

−

ms

LX (PIN 5)

Internal Switch Voltage (Note 4)

VLX

0.5

−

16

V

LX Pin On−State Sink Current (VLX = 0.4 V, VDD = 3.0 V)

ILX

100

130

−

mA

Voltage Limit (When VLX reaches VLXLIM, the LX switch is turned off by the LX

switch protection circuit)

VLXLIM

0.55

0.75

1.0

V

Off−State Leakage Current (VLX = 16 V)

ILKG

−

0.1

1.0

mA

CE (PIN 1)

CE Input Voltage (VDD = 3.0 V, VFB = 0 V)

High State, Device Enabled

Low State, Device Enabled

VCE(high)

VCE(low)

0.9

−

0.3

V

CE Input Current

High State, Device Enabled (VDD = VCE = 5.5 V)

Low State, Device Enabled (VDD = 5.5 V, VCE = VFB = 0 V)

ICE(high)

ICE(low)

−0.5

0

−0.1

0.5

mA

TOTAL DEVICE

Supply Voltage

VDD

1.2

−

5.5

V

Feedback Voltage

VFB

0.76

0.8

0.84

V

Feedback Pin Bias Current (VFB = 0.8 V)

IFB

−

15

30

nA

Operating Current 1 (VFB = 0 V, VDD = VCE = 3.0 V)

IDD1

−

130

200

mA

Operating Current 2 (VDD = VCE = VFB = 3.0 V, Not switching)

IDD2

−

19

25

mA

Off−state Current (VDD = 5.0 V, VCE = 0 V, internal 100 nA pullup current source)

IOFF

−

0.3

0.8

mA

4. Recommend maximum VOUT up to 15 V.

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NCP1403 Datasheet(PDF) 4 Page - ON Semiconductor

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