MAXM17543_V01 datasheet(4/20 Pages) MAXIM

4 / 20 page

(VIN = VEN = 24V, RRT = 40.2kΩ (500kHz) to SGND, VPGND = VMODE = VSYNC = VSGND = 0V, VCC = LX = SS = RESET = OUT =

open, VBST to VLX = 5V, VFB = 1V, TA = TJ = -40ºC to +125ºC, unless otherwise noted. Typical values are at TA = +25°C. All voltages

are referenced to SGND, unless otherwise noted.) (Note 4)

Note 4: All limits are 100% tested at TA = +25°C. Maximum and minimum limits are guaranteed by design and characterized over

temperature.

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

MODE

MODE Threshold

VM_DCM MODE = VCC (DCM mode)

VCC - 1.6

VM_PFM MODE = open (PFM mode)

VCC/2

VM_PWM MODE = GND (PWM mode)

1.4

CURRENT LIMIT

Average Current-Limit Threshold IAVG_LIMIT VOUT = VFB = 0.8V, fSW = 200kHz

3.45

RESET

Output Level Low

IRESET = 10mA

0.4

RESET

Output Leakage Current

VRESET = 5.5V, TA = TJ = +25°C

-0.1

+0.1

µA

FB Threshold for RESET

Assertion

VFB_OKF VFB falling

90.5

94.6

FB Threshold for RESET

Deassertion

VFB_OKR VFB rising

93.8

97.8

RESET

Deassertion Delay After

FB Reaches 95% Regulation

1024

Cycles

THERMAL SHUTDOWN

Thermal-Shutdown Threshold

Temperature rising

+165

°C

Thermal-Shutdown Hysteresis

°C

Electrical Characteristics (continued)

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MAXM17543

4.5V to 42V, 2.5A High-Efficiency, DC-DC Step-Down

Power Module with Integrated Inductor

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