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Axelite Confidential Materials, do not copy or distribute without written consent.

Rev.1.1 Nov.01, 2019

AX3703A



ELECTRICAL CHARACTERISTICS

TA = 25°C, VIN=5V, unless otherwise noted. Typical values are at VIN = VEN = 5V.

Characteristics

Conditions

Min

Typ

Max

Units

Input Voltage Range VIN

2.5

6.0

V

Shutdown Current

VEN = 0V, VIN = 5.5V

0.1

1

µA

Input Under Voltage Lockout

Threshold

VIN Increasing

2.3

2.4

2.5

V

Input Under Voltage Lockout

Hysteresis

280

mV

Quiescent Current IQ

VFB = 0.63V

15

20

µA

Feedback Voltage VFB

588

600

612

mV

Feedback Current IFB

-50

1

+50

nA

HS Switch Current Limit

5

A

HS Main Switch On Resistance

AX3703ACA, VIN=5V

94

mΩ

LS Synchronous Switch On

Resistance

AX3703ACA, VIN=5V

76

mΩ

HS Main Switch On Resistance

AX3703AZ8A, VIN=5V

90

mΩ

LS Synchronous Switch On

Resistance

AX3703AZ8A, VIN=5V

60

mΩ

HS Leakage Current

VIN = 5.5V, VEN = VSW = 0V

0.1

2

µA

LS Leakage Current

VIN = VSW = 5.5V, VEN = 0V

0.1

2

µA

Min Off Time

AX3703ACA

95

ns

Min Off Time

AX3703AZ8A

70

ns

PWM Switching Frequency

IIOUT = 1A

1.5

MHz

PGOOD Output Low Voltage

VFB =0.5V, sink 1mA

0.2

0.3

V

PGOOD Output Leakage Current

VFB = 0.63V , VPGOOD =

VIN = 5.5V

0.01

0.2

µA

PGOOD Under Voltage Rise

Threshold

VFB ramp up from under

voltage

-13

-10

-7

%

PGOOD Under Voltage Fall

Threshold

VFB ramp down from

regulation

-15

%

PGOOD Delay

PGOOD going High to

Low

30

µs

EN On Threshold

VEN ramp up

1.18

1.21

1.24

V

EN Off Threshold

VEN ramp down

1.11

EN Internal Pull Down Resistor

700

1000

1300

kΩ

Thermal Shutdown

160

℃

Thermal Shutdown Hysteresis

30

℃