A3908 View Datasheet(PDF) - Allegro MicroSystems

Part Name

Description

View to exact match

A3908

Low Voltage DC Motor Driver

Allegro MicroSystems 

A3908

Low Voltage DC Motor Driver

ELECTRICAL CHARACTERISTICS at TA =25°C, and VDD = 3 to 5.5 V, unless otherwise noted

Characteristics

Symbol

Test Conditions

Min.

Supply Current

UVLO Enable Threshold

UVLO Hysteresis

Thermal Shutdown Temperature

Thermal Shutdown Hysteresis

Logic Input Low Level

Logic Input High Level

Input Hysteresis

Logic Input Current

Output Driver

IDD

IDDSTB

VDDUVLO

VUVHYS

TJTSD

TJHYS

VIL

VIH

VHYS

IIN

Standby mode

VDD rising

Temperature increasing.

Recovery = TJTSD – TJHYS

VIN = 0 to 5 V

–

–

–

–

–

–

–

VDD x 55%

–

–1

Sink Driver Output Resistance

Source Driver On Resistance

Bandgap Reference

RDS

RDS(on)

VBG

VDD = 5 V, IOUT = 500 mA

VDD = 3 V, IOUT = 500 mA

VDD = 5 V, IOUT = 500 mA

VDD = 3 V, IOUT = 500 mA

–

–

–

–

1.235

VOUT Accuracy (VOUTA –VOUTB)

VOUT

VSET = 1.2 V

VSET = 825 mV

VSET = 500 mV

4.608

3.135

1.84

Typ.

0.5

–

–

120

165

15

–

–

VDD x 7%

0

0.6

0.8

0.6

0.65

1.285

4.8

3.3

2

Max.

2

500

2.6

–

–

–

VDD x 20%

–

–

1

Units

mA

nA

V

mV

°C

°C

V

V

mV

μA

–

Ω

–

Ω

–

Ω

–

Ω

1.335

V

4.992

V

3.465

V

2.16

V

THERMAL CHARACTERISTICS

Characteristics

Symbol

Test Conditions

Package Thermal Resistance*

RθJA

Measured on 4-layer board based on JEDEC

standard

*Additional thermal information is available on the Allegro Web site.

Rating

49

Unit

°C/W

Allegro MicroSystems, Inc.

4

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

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