MIC2132YML datasheet(13/48 Pages) MICROCHIP

13 / 48 page

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DS20006654B-page 13

MIC2132

Note: Unless otherwise indicated, VIN =12V; VOUT =5V; fSW = 500 kHz/phase; L1 = L2 = L3 = L4 = 4.7 µH;

RILIM = 63.4 kΩ; HS-FETs = N-ch 80V 30A 24 mΩ; LS-FETs = N-ch 80V 46A 16 mΩ; VBST – VSW =5V; TA = +25°C.

FIGURE 2-19:

Soft Start with Enable

(VOUT = 5V, IOUT = 0A).

FIGURE 2-20:

Soft Start with Enable

(VOUT = 5V, IOUT = 12A).

FIGURE 2-21:

Soft Start with Enable

(VOUT = 12V, IOUT = 0A).

FIGURE 2-22:

Soft Start with Enable

(VOUT = 28V, IOUT = 0A).

FIGURE 2-23:

Pre-Biased Start-Up

(VOUT = 5V, VPREBIAS = 1V).

FIGURE 2-24:

Pre-Biased Start-Up

(VOUT = 5V, VPREBIAS = 2.5V).

VEN

5V/div

VOUT

5V/div

IL1

5A/div

IL3

5A/div

VIN = 48V

VOUT = 5V

IOUT = 0A

2 ms/div

VEN

5V/div

VOUT

5V/div

IL1

5A/div

IL3

5A/div

VIN = 48V

VOUT = 5V

IOUT = 12A

2 ms/div

VEN

5V/div

VOUT

10V/div

VSW1

50V/div

VSW3

50V/div

VIN = 48V

VOUT = 12V

IOUT = 0A

2 ms/div

VEN

5V/div

VOUT

20V/div

VSW1

50V/div

VSW3

50V/div

VIN = 48V

VOUT = 28V

IOUT = 0A

2 ms/div

VEN

5V/div

VOUT

5V/div

VSW1

50V/div

VSW3

50V/div

VIN = 48V

VOUT = 5V

IOUT = 0.1A

2 ms/div

VPREBIAS = 1V

VEN

5V/div

VOUT

5V/div

VSW1

50V/div

VSW3

50V/div

VIN = 48V

VOUT = 5V

IOUT = 0.1A

2 ms/div

VPREBIAS = 2.5V

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