IR3575 datasheet(11/23 Pages) IRF

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June 20, 2012 | FINAL DATASHEET | V1.1

IR3575

60A Exposed Top Integrated PowIRstage®

TYPICAL OPERATING CHARACTERISTICS (CONTINUED)

Circuit of Figure 32, VIN=12V, VOUT=1.2V, ƒSW = 400kHz, L=150nH (0.29mΩ), VCC=7V, TAMBIENT = 25°C, no heat sink, no air flow,

8-layer PCB board of 3.7” (L) x 2.6” (W), no PWM controller loss, no inductor loss, unless specified otherwise.

Figure 13: Normalized Power Loss vs. VCC Voltage

Figure 14: Power Loss vs. Output Inductor

Figure 15: VCC Current vs. Switching Frequency

Figure 16: Switching Waveform, IOUT = 0A

Figure 17: Switching Waveform, IOUT = 50A

Figure 18: PWM to SW Delays, IOUT = 10A

PWM

2V/div

5V/div

40ns/div

PWM

5V/div

GATEL

10V/div

400ns/div

PWM

5V/div

GATEL

10V/div

400ns/div

0.85

0.90

0.95

1.00

1.05

1.10

1.15

120

130

140

150

160

170

180

190

200

210

Output Inductor (nH)

-2.25

-1.50

-0.75

0.00

0.75

1.50

2.25

0.85

0.90

0.95

1.00

1.05

1.10

1.15

1.20

5.00

5.25

5.50

5.75

6.00

6.25

6.50

6.75

7.00

VCC Voltage (V)

-2.25

-1.50

-0.75

0.00

0.75

1.50

2.25

3.00

200

300

400

500

600

700

800

900

1000

fsw (kHz)

Vcc=6.8V

Vcc=5V

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