MAX1763 데이터 시트보기 (PDF) - Maxim Integrated

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MAX1763

1.5A, Low-Noise, 1MHz, Step-Up DC-DC Converter

Maxim Integrated 

1.5A, Low-Noise, 1MHz, Step-Up

DC-DC Converter

Typical Operating Characteristics (continued)

(Circuit of Figure 2, VIN = +3.6V, VOUT = +5V, TA = +25°C, unless otherwise noted.)

LIGHT-LOAD SWITCHING WAVEFORMS

LOAD-TRANSIENT RESPONSE

LINE-TRANSIENT RESPONSE

A

A

A

B

B

C

B

200ns/div

VIN = 1.1V, VOUT = 3.3V, IOUT = 20mA

A: LX NODE, 5V/div

B: INDUCTOR CURRENT, 0.1A/div, AC COUPLED

C: OUTPUT RIPPLE, 0.1V/div, AC COUPLED

100μs/div

VIN = 2.4V, VOUT = 3.3V, IOUT = 0.2A TO 1.35A

A: IOUT, 0.5A/div

B: VOUT, 100mV/div, AC-COUPLED

POWER-ON DELAY

ONA

5V/div

VOUT

2V/div

40μs/div

VIN = 2.4V TO 1.4V, IOUT = 70mA

A: VIN, 1V/div

B: VOUT, 5mV/div, AC-COUPLED

STARTUP WAVEFORMS

NO SOFT-START

VOUT

2V/div

IIN

1A/div

IIN

0.5A/div

VOUT

2V/div

100μs/div

IL = 10mA

STARTUP WAVEFORMS

USING SOFT-START

IIN

1A/div

ONA

5V/div

2ms/div

VIN = 1.2V, VOUT = 3.3V, RSS = 510kΩ, CSS = 0.1μF, RLOAD = 3kΩ

ONA

5V/div

2ms/div

VIN = 1.2V, VOUT = 3.3V, RLOAD = 3kΩ

NOISE SPECTRUM

8

VIN = 2.4V

VOUT = 3.3V

6

4

2

0

0.01

0.1

1

10

FREQUENCY (MHz)

_______________________________________________________________________________________ 7

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