SC461 datasheet(7/31 Pages) SEMTECH

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SC461

Efficiency vs. Load — Power Save Mode

20%

30%

40%

50%

60%

70%

80%

90%

100%

IOUT (ADC)

12V

24V

Characteristics in this section are based on using the Detailed Application Circuit.

Efficiency vs. Load — Forced Continuous Mode

20%

30%

40%

50%

60%

70%

80%

90%

100%

(ADC)

IOUT

12V

24V

Load Regulation — Forced Continuous Mode

1.75

1.76

1.77

1.78

1.79

1.80

1.81

1.82

1.83

1.84

1.85

12V

24V

IOUT (ADC)

Efficiency vs Load - 5V output

IOUT (ADC)

20%

30%

40%

50%

60%

70%

80%

90%

100%

12V

24V

Inductor: Cyntec PCMB135T-3R3MF

High-side MOSFET: IRF7811

Low-side MOSFET: IRF7832

Frequency 360kHz

Efficiency vs Load - 12V output

20%

30%

40%

50%

60%

70%

80%

90%

100%

IOUT (ADC)

18V

24V

Inductor: Cyntec PCMB104E-4R7MS

High-side MOSFET: IRF7811

Low-side MOSFET: IRF7832

Frequency 400kHz

Load Regulation — Power Save Mode

1.75

1.76

1.77

1.78

1.79

1.80

1.81

1.82

1.83

1.84

1.85

IOUT (ADC)

12V

24V

Typical Characteristics

Internal 5V LDO bias, PSV enabled

Internal 5V LDO bias, FCM enabled

External 5V bias, PSV enabled

External 5V bias, FCM enabled

External 5V bias, PSV enabled

External 5V bias, FCM enabled

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