Rainbow-electronics MAX15058 Bedienungsanleitung PDF herunterladen (Seite 3)

High-Efficiency, 3A, Current-Mode

Synchronous, Step-Down Switching Regulator

MAX15058

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ELECTRICAL CHARACTERISTICS (continued)

= 5V, T

= -40NC to +85NC, unless otherwise noted. Typical values are at T

= +25NC.) (Note 3)

Note 3: Specifications are 100% production tested at T

= +25NC. Limits over the operating temperature range are guaranteed by

design and characterization.

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

LX Leakage Current V

= 0V 10

RMS LX Output current 3 A

OSCILLATOR

Switching Frequency f

850 1000 1150 kHz

Maximum Duty Cycle D

MAX

94 %

Minimum Controllable On-Time 70 ns

Slope Compensation Ramp

Valley

1.15 V

Slope Compensation Ramp

Amplitude

SLOPE

Extrapolated to 100% duty cycle 320 mV

ENABLE

EN Input High Threshold Voltage V

rising 1.45 V

EN Input Low Threshold Voltage V

falling 0.4 V

EN Input Leakage Current V

= 5V 0.025

SKIP Input Leakage Current V

SKIP

= V

= 5V 25

SOFT-START, PREBIAS, REFIN

Soft-Start Current I

SS/REFIN

= 0.45V, sourcing 10

SS/REFIN Discharge Resistance R

SS/REFIN

= 10mA, sinking 8.3

SS/REFIN Prebias Mode Stop

Voltage

SS/REFIN

rising 0.58 V

External Reference Input Range 0 IN - 1.8 V

HICCUP

Number of Consecutive Current-

Limit Events to Hiccup

8 Events

Timeout 1024

Clock

Cycles

POWER-GOOD OUTPUT

PGOOD Threshold V

rising 0.535 0.555 0.575 V

PGOOD Threshold Hysteresis V

falling 28 mV

PGOOD V

PGOOD

= 5mA, V

= 0.5V 20 60 mV

PGOOD Leakage V

PGOOD

= 5V, V

= 0.65V 0.013

THERMAL SHUTDOWN

Thermal Shutdown Threshold 150

Thermal Shutdown Hysteresis Temperature falling 20

1 2 3 4 5 6 7 8 ... 20 21

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