Philips BUK205-50Y ユーザーズマニュアル

Philips Semiconductors

Product specification

 TOPFET high side switch

BUK205-50Y 

 SMD version of BUK201-50Y

 

Truth table for normal, open-circuit load and overload conditions and abnormal supply voltages.

Normal on-state

1

1

1

Normal off-state

0

1

0

I

L(OC)

Open circuit load

1

1

0

1

100

350

600

mA

Open circuit load

0

1

0

T

j(TO)

Over temperature

2

1

0

0

150

175

-

˚C

Over temperature

3

0

0

0

V

BL(TO)

Short circuit load

4

1

0

0

9

10.5

12

V

Short circuit load

0

1

0

V

BG(TO)

Low supply voltage

5

X

1

0

3

4

5

V

V

BG(LP)

High supply voltage

6

X

1

0

40

45

50

V

For input ‘0’ equals low, ‘1’ equals high, ‘X’ equals don’t care.
For status ‘0’ equals low, ‘1’ equals open or high.
For output switch ‘0’ equals off, ‘1’ equals on.

T

mb

 = 25 ˚C.

The status output is an open drain transistor, and requires an external pull-up circuit to indicate a logic high.

V

SG

Status clamping voltage

I

S

 = 100 

µ

A; V

IG

 = 0 V

6

7

8

V

V

SG

Status low voltage

I

S

 = 50 

µ

A; V

BG

 = 13 V; V

IG

 = 5 V

-

0.7

0.8

V

I

S

Status leakage current

V

SG

 = 5 V

-

0.1

1

µ

A

I

S

Status saturation current

7

V

SS

 = 5 V; R

S

 = 0 

Ω

; V

BG

 = 13 V

-

5

-

mA

R

S

External pull-up resistor

8

V

SS

 = 5 V

-

100

-

k

Ω

1 In the on-state, the switch detects whether the load current is less than the quoted open load threshold current.  This is for status indication

only.  Typical hysteresis equals 140 mA.  The thresholds are specified for supply voltage within the normal working range.

2 After cooling below the reset temperature the switch will resume normal operation.  The reset temperature is lower than the trip temperature by

typically 10 ˚C.

3 If the overtemperature protection has operated, status remains low to indicate the overtemperature condition even if the input is taken low,

providing the device has not cooled below the reset temperature.

4 After short circuit protection has operated, the input voltage must be toggled low for the switch to resume normal operation.

5 Undervoltage sensor causes the device to switch off.  Typical hysteresis equals 0.7 V.

6 Overvoltage sensor causes the device to switch off to protect the load.  Typical hysteresis equals 1.3 V.

7 In a fault condition with the pull-up resistor short circuited while the status transistor is conducting.

8 The pull-up resistor also protects the status pin during reverse battery conditions.

July 1996

4

Rev 1.000