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

Efficiency vs Output Current

100.0

95.0

90.0

85.0

80.0

75.0

70.0

Vin=5V, Vo=3.3V,

LOUT: DS86C-B992AS-2R0N,

COUT=22PFx2

RTON = 80.6kOhm

Red: PSAVE Mode

Blue: Forced Continuous PWM Mode

65.0

0

1

2

3

4

Output Current (A)

Efficiency vs Output Current

95.0

90.0

85.0

80.0

75.0

70.0

65.0

60.0

Vin=5V, Vo=1.2V,

LOUT: DS86C-B992AS-2R0N

COUT=22PF

RTON = 54.9kOhm

Red: PSAVE Mode

Blue: Forced Continuous PWM Mode

55.0

0

1

2

3

4

Output Current (A)

Efficiency vs Output Current

95.0

90.0

85.0

80.0

75.0

70.0

Vo=1.2V, RTON = 54.9kOhm

65.0

60.0

LOUT: DS86C-B992AS-2R0N

COUT:22PF

Forced Continuous Mode

Red:Vin = 3.5V

55.0

50.0

Green: Vin = 4.0V

Blue: Vin = 5.0V

0

1

2

3

4

Output Current (A)

© 2010 Semtech Corporation

SC174

Output Voltage vs Output Current

3.340

3.331

3.323

Vin=5V, Vo=3.3V,

LOUT: DS86C-B992AS-2R0N,

COUT=22PFx2

RTON = 80.6kOhm

Red: PSAVE Mode

Blue: Forced Continuous PWM Mode

3.314

3.306

3.297

0

1

2

3

4

Output Current (A)

Output Voltage vs Output Current

1.215

1.210

Vin=5V, Vo=1.2V,

LOUT: DS86C-B992AS-2R0N

COUT=22PF

RTON = 54.9kOhm

Red: PSAVE Mode

Blue: Forced Continuous PWM Mode

1.205

1.200

1.195

0

1

2

3

4

Output Current (A)

Output Voltage vs Output Current

1.210

1.208

1.205

Vo=1.205V, RTON = 54.9kOhm

LOUT: DS86C-B992AS-2R0N

COUT:22PF

Forced Continuous Mode

Black: Vin = 5V

Red: Vin = 4V

Blue: Vin = 3.5V

1.203

1.200

0

1

2

3

4

Output Current (A)



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