Maxim Integrated Products 7

AC-DC and DC-DC Peak-Current-Mode Converters

with Integrated Step-Down Regulator

MAX17497A/MAX17497B

Typical Operating Characteristics (continued)

LXF AND PRIMARY

CURRENT WAVEFORM

MAX17497A/B toc10

2µs/div

100V/div

1A/div

MAX17497A/B toc12

4ms/div

ENABLE SHUTDOWN WAVEFORM

(FULL LOAD)

200V/div

10V/div

2V/div

EN/UVLO

5V/div

PEAK CURRENT LIMIT (ILIMF)

vs. RLIMF AT ROOM TEMPERATURE

RLIMF AT ROOM TEMPERATURE (kI)

70

60

40

50

20

30

10

200

400

600

800

1000

1200

1400

1600

1800

0

080

ENABLE STARTUP WAVEFORM

(FULL LOAD)

MAX17497A/B toc11

4ms/div

200V/div

10V/div

2V/div

EN/UVLO

5V/div

RESETN WAVEFORM

MAX17497A/B toc13

2ms/div

5V/div

5V/div

2V/div

PEAK-CURRENT LIMIT AT RLIMF = 100kI

vs. TEMPERATURE

MAX17497A/B toc15

TEMPERATURE (°C)

100

80

60

40

20

0

-20

1.95

1.96

1.97

1.98

1.99

2.00

1.94

-40

120