ROHM BD2051AFJ, BD2041AFJ, BD6519FJ Technical data

t

Datashee

1 Channel High Side Switch ICs

1.0A Current Limit High Side Switch ICs

BD2041AFJ BD2051AFJ

●General Description

Single channel high side switch IC for USB port is a
high side switch having over current protection used in
power supply line of universal serial bus (USB).
N-channel power MOSFET of low on resistance and
low supply current are realized in this IC.
And, over current detection circuit, thermal shutdown
circuit, under voltage lockout and soft start circuit are
built in.

●Features

 Built-in low on resistance Nch MOS FET

Switch.( Typ = 80mΩ)

 Continuous current load 0.5A
 Control input logic

¾ Active-Low : BD2041AFJ

¾ Active-High: BD2051AFJ
 Soft start circuit
 Over current detection
 Thermal shutdown
 Under voltage lockout
 Open drain error flag output
 Reverse-current protection when power switch off

●Applications

USB hub in consumer appliances, Car accessory, PC,
PC peripheral equipment, and so forth

●Ty pical A pplication Circuit

C

IN

●Lineup

Over current detection

Min. Typ. Max.

0.7A 1.0A 1.6A Low SOP-J8 Reel of 2500 BD2041AFJ-E2

0.7A 1.0A 1.6A High SOP-J8 Reel of 2500 BD2051AFJ-E2

●Key Specifications

 Input voltage range: 2.7V to 5.5V
 Continuous current load: 0.5A(Typ.)
 ON resistance : 80mΩ(Typ.)
 Over current threshold: 0.7A min., 1.6A max.
 Standby current: 0.01μA (Typ.)
 Operating temperature range: -40℃ to +85℃

●Package W(Typ.) D(Typ.) H (Max.)
SOP-J8 4.90mm x 6.00mm x 1.65mm

5V(typ.)

GND

IN
IN

EN(/EN)

Control input logic Package Orderable Part Number

OUT
OUT
OUT

/OC

+

C

L

-

VBUS
D+
D-

GND

SOP-J8

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

BD2041AFJ BD2051AFJ

/

●Block Diagram

GND

EN(/EN)

●Pin Configurations

1

GND

2

IN
IN

3

/EN

4

BD2041AFJ

TOP VIEW

●Pin Description

Pin No. Symbol I / O Pin function

1 GND I Ground.

2, 3 IN I

4 EN (/EN) I

5 /OC O

6, 7, 8 OUT O

IN

IN

Datasheet

OUT

UVLO

OUT

8

OUT

7

OUT

/OC

6

5

Charge

pump

Gate logic

TSD

OCD

1

2

3

4

Power supply input.
Input terminal to the power switch and power supply input terminal of the
internal circuit.
At use, connect each pin outside.
Enable input.
Power switch on at Low level. (BD2041AFJ)
Power switch on at High level. (BD2051AFJ)
High level input > 2.0V, Low level input < 0.8V.
Error flag output.
Low at over current, thermal shutdown.
Open drain output.
Power switch output.
At use, connect each pin outside.

OUT

OUT

/OC

BD2051AFJ

TOP VIEW

GND

IN
IN

EN

OUT

OUT

OUT

OC

8

7

6

5

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Datasheet

BD2041AFJ BD2051AFJ

●Absolute Maximum Ratings

Parameter Symbol Limits Unit
Supply voltage VIN -0.3 to 6.0 V
Enable voltage VEN, V/EN -0.3 to 6.0 V
/OC voltage V/OC -0.3 to 6.0 V
/OC current IS/OC 10 mA
OUT voltage VOUT -0.3 to 6.0 V
Storage temperature TSTG -55 to 150 °C
Power dissipation PD 560*1 mW

*1 In the case of exceeding Ta = 25°C, 4.48mW should be reduced per 1°C.

●Recommended Operating Ratings

Parameter Symbol Limits Unit
Operating voltage VIN 2.7 to 5.5 V
Operating temperature TOPR -40 to 85 °C
Continuous output current ILO 0 to 500 mA

●Electrical Characteristics

◎BD2041AFJ (Unless otherwise specified, V

Parameter Symbol

Operating Current IDD - 90 120 μA V/EN = 0V, OUT = OPEN
Standby Current ISTB - 0.01 1 μA V/EN = 5V, OUT = OPEN

V

/EN 2.0 - - V High input

/EN input voltage

/EN input current I/EN -1.0 .01 1.0 μA V/EN = 0V or V/EN = 5V
/OC output LOW voltage V/OC - - 0.5 V I/OC = 5mA
/OC output leak current IL/OC - 0.01 1 μA V/OC = 5V
ON resistance RON - 80 100 mΩ IOUT = 500mA
Over-current Threshold ITH 0.7 1.0 1.6 A

Output current at short ISC 0.7 1.0 1.3 A
Output rise time TON1 - 1.2 10 ms

Output turn on time TON2 - 1.5 20 ms
Output fall time TOFF1 - 1 20 μs
Output turn off time TOFF2 - 3 40 μs

UVLO threshold

V/EN

V

TUVH 2.1 2.3 2.5 V Increasing VIN

VTUVL 2.0 2.2 2.4 V Decreasing VIN

IN = 5.0V, Ta = 25°C)

Limits

Min. Typ. Max.

- - 0.8 V Low input

- - 0.4 V Low input 2.7V≤ VIN ≤4.5V

Unit Condition

VIN = 5V, VOUT = 0V,
C

L = 100μF (RMS)

RL = 10Ω, CL = OPEN

Datasheet

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Datasheet

BD2041AFJ BD2051AFJ

●Electrical Characteristics-Continued

◎BD2051AFJ (Unless otherwise specified, VIN = 5.0V, Ta = 25°C)

Parameter Symbol

Min. Typ. Max.

Limits

Unit Condition

Operating Current IDD - 90 120 μA VEN = 5V, OUT = OPEN
Standby Current I

EN input voltage

- 0.01 1 μA VEN = 0V, OUT = OPEN

STB

V

2.0 - - V High input

EN

VEN

- - 0.8 V Low input

- - 0.4 V Low input 2.7V≤ VIN ≤4.5V
EN input current IEN -1.0 0.01 1.0 μA VEN = 0V or VEN = 5V
/OC output LOW voltage V
/OC output leak current IL

- - 0.5 V I/OC = 5mA

/OC

- 0.01 1 μA V/OC = 5V

/OC

ON resistance RON - 80 100 mΩ IOUT = 500mA

IN = 5V, VOUT = 0V,

Output current at short ISC 0.7 1.0 1.3 A
Output rise time T

Output turn on time T
Output fall time T
Output turn off time T

- 1.2 10 ms

ON1

- 1.5 20 ms

ON2

- 1 20 μs

OFF1

- 3 40 μs

OFF2

V

L = 100μF (RMS)

C

L = 10Ω, CL = OPEN

R

Over-current Threshold ITH 0.7 1.0 1.6 A

V

2.1 2.3 2.5 V Increasing VIN

UVLO threshold

TUVH

V

2.0 2.2 2.4 V Decreasing VIN

TUVL

Datasheet

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Datasheet

BD2041AFJ BD2051AFJ

A

●Measurement Circuit

V

IN

Datasheet

V

IN

1uF

VEN(V

GND

IN
IN

EN(/EN)

)

/EN

OUT

OUT
OUT

/OC

A. Operating current B. EN, /EN input voltage, Output rise, fall time

V

IN

1uF

VEN(V

GND

IN
IN

EN(/EN)

)

/EN

OUT

OUT
OUT

/OC

C. ON resistance, Over current detection D. /OC output LOW voltage

●Timing Diagram

T

ON1

1uF

VEN(V

C

L

10k

V

IN

I

OUT

Figure 1. Measurement circuit

T

OFF1

/EN

1uF

)

VEN(V

GND

IN
IN

EN(/EN)

OUT

OUT
OUT

/OC

R

C

L

L

V

IN

GND

IN
IN

EN(/EN)

)

/EN

OUT

OUT
OUT

/OC

V

IN

I

/OC

T

OFF1

T

ON1

V

V

OUT

/EN

90%

10%

T

ON2

50% 50%

90%

10%

T

OFF2

V

OUT

V

EN

90%

10%

T

ON2

50% 50%

Figure 2. Timing diagram Figure 3. Timing diagram

BD2041AFJ BD2051AFJ

90%

10%

T

OFF2

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Datasheet

BD2041AFJ BD2051AFJ

●Typical Performance Curves

Datasheet

120

Ta=25°C

100

80

[μA]

60

DD

I

40

OPERATING CURRENT :

20

0

23456

SUPPLY VOLTAGE : V

Figure 4. Operating current

EN,/EN Enable

[V]

IN

120

VIN=5.0V

100

80

[μA]

60

DD

I

40

OPERATING CURRENT :

20

0

-50 0 50 100
AMBIENT TEMPERATURE : Ta[℃]

Figure 5. Operating current

EN,/EN Enable

1.0

Ta=25°C

0.8

0.6

[μA]

STB

I

0.4

0.2

OPERATING CURRENT :

0.0
23456

SUPPLY VOLTAGE : V

Figure 6. Operating current

EN,/EN Disable

IN

[V]

1.0

VIN=5.0V

0.8

0.6

[μA]

STB

I

0.4

0.2

OPERATING CURRENT :

0.0

-50 0 50 100
AMBIENT TEMPERATURE : Ta[℃]

Figure 7. Operating current

EN,/EN Disable

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Datasheet

BD2041AFJ BD2051AFJ

w

●Typical Performance Curves – Continued

Datasheet

2.0

Ta=25°C

1.5

Low to High

[V] 0

/EN

1.0

V

EN,

V

0.5

ENABLE INPUT VOLTAGE :

0.0
23456

SUPPLY VOLTAGE : V

Figure 8. EN,/EN input voltage

High to Low

[V]

IN

2.0

VIN=5.0V

1.5

[V]

/EN

1.0

, V

EN

V

Low to High

High to Lo

0.5

ENABLE INPUT VOLTAGE :

0.0

-50 0 50 100
AMBIENT TEMPERATURE : Ta[℃]

Figure 9. EN,/EN input voltage

0.5

Ta=25°C

0.4

0.3

[V]

/OC

V

0.2

0.1

/OC OUTPUT LOW VOLTAGE :

0.0
23456

SUPPLY VOLTAGE : V

Figure 10. /OC output LOW voltage

0.5

VIN=5.0V

0.4

0.3

[V]

/OC

V

0.2

0.1

/OC OUTPUT LOW VOLTAGE :

0.0

-50 0 50 100

[V]

IN

AMBIENT TEMPERATURE : Ta[℃]

Figure 11. /OC output LOW voltage

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Datasheet

BD2041AFJ BD2051AFJ

●Typical Performance Curves – Continued

Datasheet

ON RESISTANCE :

200

Ta=25°C

150

mΩ]

100

ON[

R

50

0

23456

SUPPLY VOLTAGE : V

Figure 12. ON resistance

[V]

IN

200

VIN=5.0V

150

[mΩ]

100

ON

R

ON RESISTANCE :

50

0

-50 0 50 100
AMBIENT TEMPERATURE : Ta[℃]

Figure 13. ON resistance

2.0

Ta=25°C

1.5

[A]

1.0

SC

I

0.5

SHORT CIRCUIT CURRENT :

0.0
23456

SUPPLY VOLTAGE : V

Figure 14. Output current at shortcircuit

(BD2041AFJ/51AFJ)

[V]

IN

2.0

VIN=5.0V

1.5

[A]

1.0

SC

I

0.5

SHORT CIRCUIT CURRENT :

0.0

-50 0 50 100
AMBIENT TEMPERATURE : Ta[℃]

Figure 15. Output current at shortcircuit

(BD2041AFJ/51AFJ)

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