MAX17543 datasheet(8/19 Pages) MAXIM

8 / 19 page

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

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

5V OUTPUT, PWM MODE (LOAD CURRENT

STEPPED FROM NO-LOAD TO 1A),

FIGURE 4a CIRCUIT

MAX17543 toc24

IOUT

1A/div

VOUT (AC)

100mV/div

40µs/div

MODE = SGND

5V OUTPUT, PFM MODE (LOAD CURRENT

STEPPED FROM 5mA TO 1A),

FIGURE 4a CIRCUIT

MAX17543 toc26

IOUT

500mA/div

VOUT (AC)

100mV/div

2ms/div

MODE = OPEN

5V OUTPUT, DCM MODE (LOAD CURRENT

STEPPED FROM 50mA TO 1A),

FIGURE 4a CIRCUIT

MAX17543 toc28

IOUT

500mA/div

VOUT (AC)

100mV/div

200µs/div

MODE = VCC

3.3V OUTPUT, PWM MODE (LOAD CURRENT

STEPPED FROM NO-LOAD TO 1A),

FIGURE 4b CIRCUIT

MAX17543 toc25

IOUT

1A/div

VOUT (AC)

50mV/div

40µs/div

MODE = SGND

3.3V OUTPUT, PFM MODE (LOAD CURRENT

STEPPED FROM 5mA TO 1A),

FIGURE 4b CIRCUIT

MAX17543 toc27

IOUT

500mA/div

VOUT (AC)

50mV/div

2ms/div

MODE = OPEN

3.3V OUTPUT, DCM MODE (LOAD CURRENT

STEPPED FROM 50mA TO 1A),

FIGURE 4b CIRCUIT

MAX17543 toc29

IOUT

500mA/div

VOUT (AC)

100mV/div

200µs/div

MODE = VCC

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MAX17543

4.5V–42V, 2.5A, High-Efficiency,

Synchronous Step-Down DC-DC Converter

with Internal Compensation

Typical Operating Characteristics (continued)

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