MAX1875-MAX1876 查看數據表（PDF） - Maxim Integrated

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MAX1875-MAX1876

Dual 180° Out-of-Phase PWM Step-Down Controllers with POR

Maxim Integrated 

Dual 180° Out-of-Phase PWM Step-

Down Controllers with POR

Typical Operating Characteristics (continued)

(Circuit of Figure 1, VIN = 12V, TA = +25°C, unless otherwise noted.)

SOFT-START AND SOFT-STOP WAVEFORM

MAX1875 toc07

5V

EN

0V

VOUT2

1V/div

0V

VOUT2

1V/div

0V

RESET TIMEOUT (MAX1876 ONLY)

MAX1875 toc08

5V/div

EN

0

VOUT2

0V

VOUT1

0V

VRST

0V

OUT-OF-PHASE WAVEFORM

MAX1875 toc09

VOUT1

20mV/div

12V

VLX1

0V

12V

VLX2

0V

VOUT2

20mV/div

1ms/div

100ms/div

1µs/div

EXTERNALLY SYNCHRONIZED

SWITCHING WAVEFORM

5V MAX1875 toc10

VSYNC

0V

5V

VCK0

0V

10V

VLX1

0V

VOUT1

10mV/div

AC-COUPLED

400ns/div

CKO OUTPUT WAVEFORM

MAX1875 toc11

SYNC = GND

400ns/div

5V

VCK0

0V

10V

VLX1

0V

VOUT1

10mV/div

AC-COUPLED

CKO OUTPUT WAVEFORM

MAX1875 toc12

SYNC = VL

5V

VCK0

0V

10V

VLX1

0V

VOUT1

10mV/div

400ns/div

SHORT-CIRCUIT CURRENT FOLDBACK

AND RECOVERY

MAX1875 toc13

IOUT1 = 10A(5A/div)

VOUT1 = 1.8V(1V/div)

SHORT

VOUT2

VOUT2 = 2.5V(1V/div)

IOUT2 = 10A(5A/div)

4ms/div

_______________________________________________________________________________________ 5

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