NCP1596A datasheet(3/12 Pages) ONSEMI

Part #	NCP1596A

Description	1.5 A, 1.5 MHz Current Mode PWM Buck Down Converter

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Manufacturer	ONSEMI [ON Semiconductor]

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NCP1596A

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ELECTRICAL CHARACTERISTICS

(VIN = 5.0 V, VOUT = 1.2 V, TA = 25°C for typical value, −40°C ≤ TA ≤ 85°C for min/max values unless otherwise noted)

Characteristic

Symbol

Min

Typ

Max

Unit

Operating Voltage

VIN

4.0

−

5.5

V

Under Voltage Lockout Threshold

VUVLO

3.2

3.5

3.8

V

Under Voltage Lockout hysteresis

VUVLO_HYS

−

180

−

mV

PFET Leakage Current (Pins 5, 4)

TA = 25°C

TA = −40°C to 85°C

ILEAK−P

−

1.0

−

10

15

mA

FEEDBACK VOLTAGE

FB Input Threshold (TA = −40°C to 85°C)

VFB

0.788

0.800

0.812

V

FB Input Current

IFB

−

10

100

nA

THERMAL SHUTDOWN

Thermal Shutdown Threshold (Note 5)

TSHDN

−

160

−

°C

Hysteresis (Note 5)

TSDHYS

−

30

−

°C

PWM SMPS MODE

Switching Frequency (TA = −40°C to 85°C)

FOSC

1.27

1.5

1.725

MHz

Internal PFET ON−Resitance (ILX = 100 mA, VIN = 5.0 V, TA = 25°C) (Note 5)

RDS(on)_P

−

0.2

0.3

Ohm

Minimum Duty Cycle

DMIN

−

0

−

%

Maximum Duty Cycle

DMAX

−

100

−

%

Soft−Start Time (VIN = 5.0 V, Vo = 1.2 V, ILOAD = 0 mA, TA = 25°C)

TSS

0.8

1.0

1.2

ms

Main PFET Switch Current Limit (Note 5)

ILIM

2.0

2.5

−

A

ENABLE

Enable Threshold High

VEN_H

1.8

−

V

Enable Threshold Low

VEN_L

−

0.4

V

Enable bias current (EN = 0 V)

IEN

−

500

−

nA

EFFICIENCY

Output Load Current 10 mA @ 1.2 V (Note 5)

h

−

50

−

%

Output Load Current 100 mA to 1.2 A @ 1.2 V (Note 5)

h

−

70

−

%

TOTAL DEVICE

Quiescent Current Into VCCP (VIN = 5 V, VFB = 1.0 V, TA = 25°C)

ICCP

−

10

−

mA

Quiescent Current Into VCC (VIN = 5 V, VFB = 1.0 V, TA = 25°C)

ICC

−

500

−

mA

Shutdown Quiescent Current into VCC and VCCP

(EN = 0, VIN = 5 V, VFB = 1.0 V, TA = 25°C)

ICC_SD

−

1.0

3.0

mA

5. Values are design guaranteed.

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