NCP1550SN19T1 datasheet(3/18 Pages) ONSEMI

Part #	NCP1550SN19T1

Description	600 kHz PWM/PFM Step-Down DC-DC Controller

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Manufacturer	ONSEMI [ON Semiconductor]

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ELECTRICAL CHARACTERISTICS (VIN = 5.0 V, TA = 25°C for typical value, −40°C v TA v 85°C for min/max values unless

otherwise noted.)

Characteristic

Symbol

Min

Typ

Max

Unit

TOTAL DEVICE

Input Voltage

VIN

2.45

−

5.50

V

Output Voltage (ILOAD = 0 mA, TA = 25°C)

NCP1550SN18T1

NCP1550SN19T1

NCP1550SN25T1

NCP1550SN27T1

NCP1550SN30T1

NCP1550SN33T1

VOUT

1.764

1.862

2.450

2.646

2.940

3.234

1.8

1.9

2.5

2.7

3.0

3.3

1.836

1.938

2.550

2.754

3.060

3.366

V

Input Current into VOUT Pin

NCP1550SN18T1

NCP1550SN19T1

NCP1550SN25T1

NCP1550SN27T1

NCP1550SN30T1

NCP1550SN33T1

IVOUT

−

2.5

4.0

mA

Temperature Coefficient

DVOUT/DVT

−

100

−

ppm/

°C

Operating Current (VIN = 5.0 V, VCE = 5.0 V, No External Components)

NCP1550SN18T1

NCP1550SN19T1

NCP1550SN25T1

NCP1550SN27T1

NCP1550SN30T1

NCP1550SN33T1

IDD

−

50

80

mA

Off−State Current (VIN = 5.0 V, VCE = 0 V, TA = 25°C)

NCP1550SN18T1

NCP1550SN19T1

NCP1550SN25T1

NCP1550SN27T1

NCP1550SN30T1

NCP1550SN33T1

IOFF

−

0.3

0.5

mA

OSCILLATOR

Frequency

FOSC

510

600

690

kHz

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

DFOSC/DTA

−

0.11

−

%/

°C

Maximum Duty Cycle

DMAX

100

−

%

PWM/PFM Switchover ON Time Threshold (Note 4)

TON(PFM)

167

320

500

ns

Soft−Start Delay Time (Note 4)

Tss

−

8.0

−

ms

Protection Delay Time (Auto Restart)

Tprot

−

8.0

−

ms

OUTPUT DRIVE (PIN 4)

EXT “H” Output Current (VEXT = VIN – 0.4 V)

IEXTH

−

−60

−

mA

EXT “L” Output Current (VEXT = 0.4 V)

IEXTL

−

100

−

mA

EXT “L−H” Rise Time (CLOAD = 1000 pF) (VIN = 5.0 V)

Tr

−

65

−

ns

EXT “H−L” Fall Time (CLOAD = 1000 pF) (VIN = 5.0 V)

Tf

−

40

−

ns

EXT “L−H” Rise Time (CLOAD = 5.0 nF) (VIN = 5.0 V)

Tr

−

140

−

ns

EXT “H−L” Fall Time (CLOAD = 5.0 nF) (VIN = 5.0 V)

Tf

−

90

−

ns

4. PWM/PFM Switchover ON Time Threshold min/max guaranteed by design only.

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NCP1550SN19T1 Datasheet(PDF) 3 Page - ON Semiconductor

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