MAX1951A Просмотр технического описания (PDF) - Maxim Integrated

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производитель

MAX1951A

1MHz, 2A, 2.6V to 5.5V Input, PWM DC-DC Step-Down Regulator with Enable

Maxim Integrated 

1MHz, 2A, 2.6V to 5.5V Input, PWM DC-DC

Step-Down Regulator with Enable

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.)

0.50

0.40

0.30

0.20

0.10

0

-0.10

-0.20

-0.30

-0.40

-0.50

0

LOAD REGULATION

VOUT = 2.5V

VOUT = 1.5V

VOUT = 1.8V

0.4 0.8 1.2 1.6 2.0

OUTPUT CURRENT (A)

LOAD TRANSIENT (50% TRANSIENT)

MAX1951A toc05

IOUT

1A/div

VOUT = 2.5V

VOUT

(AC-COUPLED)

500mV/div

40Fs/div

LOAD TRANSIENT (90% TRANSIENT)

MAX1951A toc06

IOUT

1A/div

40Fs/div

VOUT

(AC-COUPLED)

200mV/div

SWITCHING WAVEFORMS

(VIN = 3.3V, VOUT = 1.8V, RL = 1I)

MAX1951A toc07

ILX

500mA/div

LX

2V/div

SOFT-START WAVEFORMS

(VIN = 3.3V, VOUT = 1.8V)

MAX1951A toc08

EN

2V/div

400ns/div

VOUT

(AC-COUPLED)

10mV/div

1ms/div

VOUT

1V/div

SOFT-START WAVEFORMS

(VIN = 3.3V, VOUT = 0.8V)

MAX1951A toc09

STARTUP INTO PREBIASED

OUTPUT

MAX1951A toc10

EN

2V/div

VOUT

500mV/div

VOUT = 1.5V

VOUT = 2.5V

EN

5V/div

LX

5V/div

VOUT

2V/div

1ms/div

1ms/div

4 _______________________________________________________________________________________

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