MAX15040 datasheet(4/15 Pages) MAXIM

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EFFICIENCY

vs. OUTPUT CURRENT

OUTPUT CURRENT (A)

100

0.1

VDD = VIN = 3.3V

VOUT = 1.2V

VOUT = 1.8V

VOUT = 1.5V

VOUT = 2.5V

EFFICIENCY

vs. OUTPUT CURRENT

OUTPUT CURRENT (A)

100

0.1

VIN = VDD = 2.5V

VOUT = 1.8V

VOUT = 1.2V

VOUT = 1.5V

High-Efficiency, 4A, Step-Down Regulator with

Integrated Switches in 2mm x 2mm Package

_______________________________________________________________________________________

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

THERMAL SHUTDOWN

Thermal-Shutdown Threshold

Rising

+165

°C

Thermal-Shutdown Hysteresis

°C

POWER-GOOD (PWRGD)

VFB falling, VREFIN/SS = 0.6V

Power-Good Threshold Voltage

VFB rising, VREFIN/SS = 0.6V

92.5

% of

VREFIN/SS

Power-Good Edge Deglitch

VFB falling or rising

Clock

cycles

PWRGD Output-Voltage Low

IPWRGD = 4mA (sinking)

0.03

0.15

PWRGD Leakage Current

VDD = VPWRGD = 3.6V, VFB = 0.9V

0.01

µA

OVERCURRENT LIMIT (HICCUP MODE)

Current-Limit Startup Blanking

112

Clock

cycles

Restart Time

896

Clock

cycles

FB Hiccup Threshold

VFB falling

% of

VREFIN/SS

Hiccup Threshold Blanking Time

VFB falling

µs

Note 3: Specifications are 100% production tested at TA = +25°C. Limits over the operating temperature range are guaranteed by

design and characterization.

Note 4: Guaranteed by design.

ELECTRICAL CHARACTERISTICS (continued)

(VIN = VDD = 3.3V, TA = -40°C to +85°C. Typical values are at TA = +25°C, circuit of Figure 1, unless otherwise noted.) (Note 3)

Typical Operating Characteristics

(VIN = VDD = 3.3V, output voltage = 1.8V, ILOAD = 4A, and TA = +25°C, circuit of Figure 1, unless otherwise noted.)

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