Maxim Integrated Products 9

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

with Integrated Step-Down Regulator

MAX17497A/MAX17497B

Typical Operating Characteristics (continued)

LXB AND INDUCTOR WAVEFORM

MAX17497A/B toc22

400ns/div

0.5A/div

5V/div

LOAD STEP ON BUCK REGULATOR

MAX17497A/B toc24

1ms/div

50mV/div

0.2A/div

EFFICIENCY GRAPH vs. LOAD CURRENT

(FLYBACK REGULATOR)

LOAD CURRENT (A)

0

10

20

30

40

50

60

70

80

90

100

00.2

0.40.6

0.81.0

1.21.4

3.310

3.315

3.320

3.325

3.33

00.1

0.20.3

0.40.5

0.6

BODE PLOT (BUCK REGULATOR)

MAX17497A/B toc25

0dBm

67 8912 34 56 7891

23 4

GAIN

10dB/div

PHASE

36°/div

BW = 110kHz

PM = 57°

EFFICIENCY vs. LOAD CURRENT

(BUCK REGULATOR)

LOAD CURRENT (A)

0.5

0.4

0.3

0.2

0.1

10

20

30

40

50

60

70

80

90

100

0

0

0.6

MAX17497A/B toc27