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Rev.1.1 Nov.05, 2019

AX3984



ELECTRICAL CHARACTERISTICS

TA = +25°C, VIN = 12V, unless otherwise noted.

Characteristics

Conditions

Min

Typ

Max

Units

Supply Voltage

4.5

23

V

Shutdown Supply Current

VEN = 0V

10

μA

Regulated Feedback Voltage

4.5V≦VIN≦23V

0.9

0.925

0.95

V

Error Amplifier Transconductance

△ICOMP = ±10μA

700

μA/V

Current Sense to COMP

Transconductance

2.2

A/V

Current Limit

4.3

A

SW Leakage Current

VEN = 0V, VSW = 0V

10

μA

High Side On Resistance

0.13

Ω

Low Side On Resistance

0.10

Ω

Oscillation Frequency

260

330

400

KHz

Short Circuit Oscillation

Frequency

VFB=0V

82.5

kHz

Maximum Duty Cycle

VFB=0.7V

90

%

Minimum Duty Cycle

VFB=1.1V

0

%

Minimum On Time

100

ns

Under Voltage Lockout Threshold

VIN Rising

3.85

4.1

4.35

V

Under Voltage Lockout Threshold

Hysteresis

250

mV

Thermal Shutdown Threshold

155

℃

EN High Level

2.8

V

EN Low Level

0.6

V

EN Input Current

VEN = 0V

3

3.6

μA

Soft-Start Current

VSS=0V

5.3

uA

Soft-Start Period

Css=0.1uF

28

mS