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Electrical characteristics (continued) – Rainbow Electronics MAX15038 User Manual

Page 4

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MAX15038

4A, 2MHz Step-Down Regulator
with Integrated Switches

4

_______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(V

IN

= V

EN

= 5V, C

VDD

= 2.2µF, T

A

= T

J

= -40°C to +85°C, typical values are at T

A

= +25°C, circuit of Figure 1, unless otherwise

noted.) (Note 3)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

R

FREQ

= 49.9k

0.9

1

1.1

LX Switching Frequency

V

IN

= 2.9V to 5V

R

FREQ

= 23.6k

1.8

2

2.2

MHz

Switching Frequency Range

500

2000

kHz

LX Minimum Off-Time

78

ns

LX Maximum Duty Cycle

R

FREQ

= 49.9k

92

95

%

LX Minimum Duty Cycle

R

FREQ

= 49.9k

5

15

%

Average Short-Circuit IN Supply
Current

OUT connected to GND, V

IN

= 5V

0.15

A

RMS LX Output Current

4

A

ENABLE

EN Input Logic-Low Threshold

EN falling

0.9

V

EN Input Logic-High Threshold

EN rising

1.5

V

EN Input Current

V

EN

= 0 or 5V, V

IN

= 5V

0.01

µA

MODE

Logic-low, falling

26

Logic V

DD

/2 or floating, rising

50

MODE Input-Logic Threshold

Logic-high, rising

74

% V

DD

MODE Input-Logic Hysteresis

MODE falling

5

% V

DD

MODE = GND

-5

MODE Input Bias Current

MODE = V

DD

5

µA

SS

SS Current

V

SS

= 0.45V, V

REFIN

= 0.6V, sourcing

6.7

8

9.3

µA

THERMAL SHUTDOWN

Thermal-Shutdown Threshold

Rising

165

°C

Thermal-Shutdown Hysteresis

25

°C

POWER-GOOD (PWRGD)

V

FB

falling, V

REFIN

= 0.6V

88

90

92

Power-Good Threshold Voltage

V

FB

rising, V

REFIN

= 0.6V

92.5

%

V

REFIN

Power-Good Edge Deglitch

V

FB

rising or falling

48

Clock

cycles

PWRGD Output Voltage Low

I

PWRGD

= 4mA

0.03

0.1

V

PWRGD Leakage Current

V

IN

= V

PWRGD

= 5V, V

FB

= 0.7V, V

REFIN

= 0.6V

0.01

µA

HICCUP OVERCURRENT LIMIT

Current-Limit Startup Blanking

112

Clock

cycles

Autoretry Restart Time

896

Clock

cycles