MAX1705C データシートの表示（PDF） - Maxim Integrated

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MAX1705C

1- to 3-Cell, High-Current, Low-Noise, Step-Up DC-DC Converters with Linear Regulator

Maxim Integrated 

1- to 3-Cell, High-Current, Low-Noise,

Step-Up DC-DC Converters with Linear Regulator

____________________________Typical Operating Characteristics (continued)

(Circuit of Figure 2, TA = +25°C, unless otherwise noted.)

LINEAR-REGULATOR POWER-SUPPLY

REJECTION RATIO vs. FREQUENCY

60

LINEAR-REGULATOR

REGION OF STABLE C6 ESR

vs. LOAD CURRENT

100

C6 = 22µF

50

10

UNCOMPENSATED

40

C2 = 22pF (FEED FORWARD)

30

1

20

10

0

100

VOUT = 4V TO 5V

VLDO = 3.3V

ILDO = 200mA

C5 = 0.33µF

STABLE REGION

0.1

1k

10k 100k 1M

FREQUENCY (Hz)

0

10M

1 50 100 150 200 250 300

MAX1705

LOAD CURRENT (mA)

NOISE SPECTRUM AT POUT

(VOUT = 4.5V, VIN = 1.2V, 200mA LOAD)

0V

1k

10k

100k

1M

10M

FREQUENCY (Hz)

MAX1705

LINEAR-REGULATOR OUTPUT NOISE SPECTRUM

(VLDO = 3.3V, VOUT = 4.5V, VIN = 1.2V, ILDO = 200mA)

0V

1k

10k

100k

1M

10M

FREQUENCY (Hz)

_______________________________________________________________________________________ 7

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