Rev. M 12/21

37

TOP252-262

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NOTES:

A. For specifications with negative values, a negative temperature coefficient corresponds to an increase in magnitude with increas-

ing temperature, and a positive temperature coefficient corresponds to a decrease in magnitude with increasing temperature.

B. Guaranteed by characterization. Not tested in production.

C. For externally adjusted current limit values, please refer to Figures 55a and 55b (Current Limit vs. External Current Limit Resis-

tance) in the Typical Performance Characteristics section. The tolerance specified is only valid at full current limit.

D. I2f calculation is based on typical values of I

LIMIT and fOSC, i.e. ILIMIT(TYP)

2

× f

OSC, where fOSC = 66 kHz or 132 kHz depending on package

/ F pin connection. See f

OSC specification for detail.

E. The TOPSwitch-HX will start up at 18 V

DC drain voltage. The capacitance of electrolytic capacitors drops significantly at tempera-

tures below 0 °C. For reliable start up at 18 V in sub zero temperatures, designers must ensure that circuit capacitors meet

recommended capacitance values.

F. Breakdown voltage may be checked against minimum BV

DSS specification by ramping the DRAIN pin voltage up to but not

exceeding minimum BV

DSS.

Parameter

Symbol

Conditions

SOURCE = 0 V; T

J = -40 to 125 °C

(Unless Otherwise Specified)

Min

Typ

Max

Units

Output (cont.)

ON-State

Resistance

R

DS(ON)

TOP259

I

D = 600 mA

T

J = 25 °C

1.45

1.70

W

T

J = 100 °C

2.25

2.60

TOP260

I

D = 700 mA

T

J = 25 °C

1.20

1.40

T

J = 100 °C

1.80

2.10

TOP261

I

D = 800 mA

T

J = 25 °C

1.05

1.20

T

J = 100 °C

1.55

1.80

TOP262

I

D = 900 mA

T

J = 25 °C

0.90

1.05

T

J = 100 °C

1.35

1.55

DRAIN Supply Voltage

T

J ≤ 85 °C, See Note E

18

V

36

OFF-State Drain

Leakage Current

I

DSS

V

V, VM = Floating, IC = 4 mA,

V

DS = 560 V, TJ = 125 °C

470

mA

Breakdown

Voltage

BV

DSS

V

V, VM = Floating, IC = 4 mA,

T

J = 25 °C

See Note F

700

V

Rise Time

t

R

Measured in a Typical Flyback

Converter Application

100

ns

Fall Time

t

F

50

ns

Supply Voltage Characteristics

Control Supply/

Discharge Current

I

CD1

Output

MOSFET

Enabled

V

X, VV, VM =

0 V

66 kHz

Operation

TOP252-255

0.6

1.2

2.0

mA

TOP256-258

0.9

1.4

2.3

TOP259-262

1.1

1.6

2.5

132 kHz

Operation

TOP252-255

0.8

1.3

2.2

TOP256-258

1.1

1.6

2.5

TOP259-262

1.5

2.2

2.9

I

CD2

Output MOSFET Disabled

V

X, VV, VM = 0 V

0.3

0.6

1.3