MAX1952ESA 데이터 시트보기 (PDF) - Maxim Integrated

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MAX1952ESA

1MHz, All-Ceramic, 2.6V to 5.5V Input, 2A PWM Step-Down DC-to-DC Regulators

Maxim Integrated 

1MHz, All Ceramic, 2.6V to 5.5V Input,

2A PWM Step-Down DC-to-DC Regulators

Typical Operating Characteristics (continued)

(Typical values are at VIN = VCC = 5V, VOUT = 1.5V, IOUT = 1.5A, and TA = +25°C, unless otherwise noted. See Figure 2.)

SWITCHING WAVEFORMS

MAX1951 toc08

INDUCTOR CURRENT

1A/div

0A

0V

VLX

5V/div

200ns/div

VIN = 3.3V

VOUT = 1.8V

ILOAD = 1.5A

OUTPUT VOLTAGE

10mV/div,

AC-COUPLED

SOFT-START WAVEFORMS

MAX1951 toc09

VCOMP

2V/div

OUTPUT VOLTAGE

1V/div

VIN = VCC = 3.3V

VOUT = 2.5V

ILOAD = 1.5A

1ms/div

SOFT-START WAVEFORMS

MAX1951 toc10

VCOMP

2V/div

OUTPUT VOLTAGE

0.5V/div

VIN = VCC = 3.3V

VOUT = 0.8V

1ms/div

SHUTDOWN WAVEFORMS

MAX1951 toc11

0V

VCOMP

2V/div

0V

VLX

5V/div

VIN = VCC = 3.3V

VOUT = 2.5V

ILOAD = 1.5A

OUTPUT VOLTAGE

1V/div

0V

20μs/div

SHUTDOWN CURRENT

vs. INPUT VOLTAGE

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0

2.5 3.0 3.5 4.0 4.5 5.0 5.5

INPUT VOLTAGE (V)

6 _______________________________________________________________________________________

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