MAX1544 데이터 시트보기 (PDF) - Maxim Integrated

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MAX1544

Dual-Phase, Quick-PWM Controller for AMD Hammer CPU Core Power Supplies

Maxim Integrated 

Dual-Phase, Quick-PWM Controller for

AMD Hammer CPU Core Power Supplies

Typical Operating Characteristics (continued)

(Circuit of Figure 1, VIN = 12V, VCC = VDD = 5V, SHDN = SKIP = VCC, D0–D4 set for 1.5V (SUS = GND), S0–S1 set for 1V

(SUS = VCC), OFS = GND, TA = +25°C, unless otherwise specified.)

POWER-UP SEQUENCE

MAX1544 toc18

5V

A

0

2V

1V

B

0

5V

C

0

1ms/div

A. SHDN, 5V/div

B. 1.5V OUTPUT, 1V/div

C. VROK, 5V/div

RTIME = 64.9kΩ

SOFT-START

MAX1544 toc19

5V

A

0

1.5V

B

0

10A

C

0

D

0

100µs/div

A. SHDN, 5V/div

B. 1.5V OUTPUT, 1V/div

C. IL1, 10A/div

D. IL2, 10A/div

RLOAD = 75mΩ, RTIME = 64.9kΩ

SOFT-SHUTDOWN

MAX1544 toc20

5V

A

0

1.5V

B

0

10A

C

10A

0

D

200µs/div

A. SHDN, 5V/div

B. 1.5V OUTPUT, 1V/div

C. IL1, 10A/div

D. IL2, 10A/div

RLOAD = 75mΩ, RTIME = 64.9kΩ

1.50V LOAD TRANSIENT

(10A TO 50A LOAD)

MAX1544 toc21

50A

A

10A

1.5V

B

20A

20A

0

C

0

D

20µs/div

A. LOAD CURRENT, (ILOAD = 10A TO 50A), 50A/div

B. OUTPUT VOLTAGE (1.50V NO LOAD), 100mV/div

C. IL1, 10A/div

D. IL2, 10A/div

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