SC2447 View Datasheet(PDF) - Semtech Corporation

Part Name

Description

Manufacturer

SC2447

Dual-Phase, Single or Dual Output Synchronous Step-Down Controller

Semtech Corporation 

SC2447

POWER MANAGEMENT

Typical Application Circuit Performance

Circuit Conditions: 2-Output Configuration as in Figure 16. VIN = 12V, VOUT1 = 2.5V, VOUT2 = 1.2V, ROSC = 51.1kΩ, SYNC = 0, and TA = 25°C.

Soft-Start Up (VOUT1)

Pre-biased Start Up (VOUT1)

Shutdown (VOUT1)

VOUT1

1V/div

VSS1/EN1

2V/div

IOUT1

10A/div

10ms/div

VOUT1

1V/div

VSS1/EN1

2V/div

IOUT1=0A

10ms/div

VOUT1

1V/div

IOUT1

2A/div

VSS1/EN1

5V/div

VGDL1

5V/div

ROUT1=1Ω

200µs/div

Output Voltage Ripple (VOUT1)

Load Transient Response (VOUT1)

Overload Hiccup (VOUT1)

VOUT1

20mV/div

IOUT1

10A/div

VSW1

10V/div

IOUT1=20A

2µs/DIV

VOUT1

0.1V/div

IOUT1

5A/div

IOUT1=15A to 20A 200µs/div

VOUT1

1V/div

VSS1/EN1

2V/div

IOUT1

20A/div

50ms/div

Soft-Start Up (VOUT2)

VOUT2

0.5V/div

VSS2/EN2

2V/div

IOUT2

20A/div

10ms/div

© 2006 Semtech Corp.

Pre-biased Start Up (VOUT2)

Shutdown (VOUT2)

VOUT2

0.5V/div

VSS2/EN2

2V/div

IOUT2

20A/div

IOUT2=0A

10ms/div

7

VOUT2

0.5V/div

IOUT2

1A/div

VSS2/EN2

5V/div

VGDL2

5V/div

ROUT2=1Ω

200µs/div

www.semtech.com

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