MAX17543 datasheet(7/19 Pages) MAXIM

7 / 19 page

(VIN = VEN/UVLO = 24V, VPGND = VSGND = 0V, CVIN = CVCC = 2.2µF, CBST = 0.1µF, CSS = 5600pF, RT = MODE = open, TA = -40°C to

+125°C, unless otherwise noted. Typical values are at TA = +25°C. All voltages are referenced to GND, unless otherwise noted.)

Typical Operating Characteristics (continued)

5V OUTPUT, 2.5A LOAD CURRENT

STEADY-STATE SWITCHING WAVEFORMS,

FIGURE 4a CIRCUIT

MAX17543 toc18

ILX

1A/div

VLX

10V/div

VOUT (AC)

50mV/div

1µs/div

5V OUTPUT, PFM MODE, 25mA LOAD

STEADY-STATE SWITCHING WAVEFORMS,

FIGURE 4a CIRCUIT

MAX17543 toc20

ILX

500mA/div

VLX

10V/div

VOUT (AC)

100mV/div

10µs/div

MODE = OPEN

5V OUTPUT, PWM MODE

(LOAD CURRENT STEPPED FROM 1A TO 2A),

FIGURE 4a CIRCUIT

MAX17543 toc22

IOUT

1A/div

VOUT (AC)

100mV/div

40µs/div

MODE = SGND

5V OUTPUT, PWM MODE, NO LOAD

STEADY-STATE SWITCHING WAVEFORMS,

FIGURE 4a CIRCUIT

MAX17543 toc19

ILX

500mA/div

VLX

10V/div

VOUT (AC)

50mV/div

1µs/div

MODE = SGND

5V OUTPUT, DCM MODE, 25mA LOAD

STEADY-STATE SWITCHING WAVEFORMS,

FIGURE 4a CIRCUIT

MAX17543 toc21

ILX

200mA/div

VLX

10V/div

VOUT (AC)

20mV/div

1µs/div

MODE = VCC

3.3V OUTPUT, PWM MODE

(LOAD CURRENT STEPPED FROM 1A TO 2A),

FIGURE 4b CIRCUIT

MAX17543 toc23

IOUT

1A/div

VOUT (AC)

50mV/div

40µs/div

MODE = SGND

Maxim Integrated │ 7

www.maximintegrated.com

MAX17543

4.5V–42V, 2.5A, High-Efficiency,

Synchronous Step-Down DC-DC Converter

with Internal Compensation

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