SC174 View Datasheet(PDF) - Semtech Corporation

Part Name

Description

Manufacturer

SC174

4A EcoSpeed™ Synchronous Step-Down Regulator with Optional Ultrasonic Power Save

Semtech Corporation 

Typical Characteristics

OCP Valley Threshold vs Temperature

5.5

5.3

VDD=5.0V

5.0

4.8

4.5

4.3

VDD=3.0V

4.0

3.8

3.5

-50 -25

0 25 50 75 100 125

Temperature (°C)

IVIN Input Current In Shutdown vs Temperature

3.5

3.0

2.5

2.0

VIN=5V

1.5

Blue: VLX=GND

Black: VLX=VIN

1.0

0.5

0.0

-50 -25

0 25 50 75 100 125

Temperature (°C)

IBST Leakage Current vs Temperature

0.5

0.0

-0.5

-1.0

-1.5

-2.0

VIN=5V

VBST=VIN

-2.5

-3.0

-50 -25

0 25 50 75 100 125

Temperature (°C)

© 2010 Semtech Corporation

SC174

Start up waveform ( VIN=5V, VOUT=1.2V, IOUT=4A,

Channel 1: 500mV/Div, Channel 4: 2A/Div, Time: 0.5ms/Div )

Load Transient Test (VIN=5V, VOUT=1.2V, IOUT= 0A to 4A,

Forced Continuous Conduction Mode, LOUT=1.3PH,

COUT=3x22PF, Channel 1: 50mV/Div, Channel

2:5V/Div,Channel 4: 2A/Div, Time:10Ps/Div)

Load Transient Test (VIN=5V, VOUT=1.2V, IOUT= 4A to 0A,

Forced Continuous Conduction Mode, LOUT=1.3PH,

COUT=3x22PF, Channel 1: 50mV/Div, Channel

2:5V/Div,Channel 4: 2A/Div, Time:10Ps/Div)



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