1ch High Side Switch ICs

0.5A Current Limit High Side Switch ICs

BD2045AFJ

BD2055AFJ

General Description

BD2045AFJ and BD2055AFJ are single channel high

side switch ICs with over-current protection for

Universal Serial Bus (USB) power supply line. These

ICs have low ON-Resistance N-Channel power

MOSFETs with low supply current, built-in over-current

protection circuit, thermal shutdown circuit, under

voltage lockout and soft-start circuit.

Features



Built-In Low ON-Resistance Nch MOSFET

( Typ=80mΩ )



Control Input Logic



Active-Low:

BD2045AFJ



Active-High:

BD2055AFJ



Soft-Start Circuit



Over-Current Protection



Thermal Shutdown



Under Voltage Lockout Function



Open Drain Error Flag Output



Reverse-Current Protection when Switch Off



Flag Output Delay

Applications

USB Hub in Consumer Appliances, PC, PC Peripheral

Equipment, and so forth

Key Specifications



Input Voltage Range:

2.7V to 5.5V



ON-Resistance:

80mΩ(Typ)



Continuous Current Load:

0.25A



Over-Current Threshold:

0.3A (Min), 0.8A (Max)



Standby Current:

0.01μA (Typ)



Output Rise Time:

1.2ms(Typ)



Operating Temperature Range:

-40°C to +85°C

Package

W(Typ) D(Typ) H (Max)

Typical Application Circuit

Lineup

Over-Current Threshold

Control Input

Logic

Package

Orderable Part Number

Min

Typ

Max

0.3A

0.5A

0.8A

Low

SOP-J8

Reel of 2500

BD2045AFJ-E2

0.3A

0.5A

0.8A

High

SOP-J8

Reel of 2500

BD2055AFJ-E2

SOP-J8

4.90mm x 6.00mm x 1.65mm

OUT

OUT

OUT

IN

IN

/OC

GND

VBUS

D-

D+

GND

5V(Typ)

-

+

EN( /EN )

○

Product structure：Silicon monolithic integrated circuit ○This product has not designed protection against radioactive rays

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TSZ22111･14･001

TSZ02201-0E3E0H300130-1-2

21.Aug.2014 Rev.002

Datasheet