EUP2539

DS2539

Ver1.1

Apr. 2009

4

Absolute Maximum Ratings (1)

IN, EN, FB to GND ------------------------------------------------------------------

-0.3V to 6V

SW to GND ---------------------------------------------------------------------------

-0.3V to 40V

TSOT23-5 -----------------------------------------------------------------------------

0.4W

Package Thermal Resistance

220°C/W

Maximum Junction Temperature ---------------------------------------------------

125°C

Lead Temperature (Soldering, 10sec.) ---------------------------------------------

260°C

Storage Temperature Range ---------------------------------------------------------

-65°C to +150°C

Operating Conditions (2)

Operating Temperature Range ----------------------------------------------------

-40°C to +85°C

2.6V to 5.5V

Note (1): Stress beyond those listed under “Absolute Maximum Ratings” may damage the device.

Note (2): The device is not guaranteed to function outside the recommended operating conditions.

Electrical Characteristics

EUP2539

Symbol

Parameter

Conditions

Min

Typ

Max.

Unit

UVLO

Under Voltage Lock Out

Rising

2.2

2.4

2.6

V

Maximum Output Voltage

No Switching

40

V

Supply Current

1.7

2.6

mA

Quiescent Current

130

170

µA

Shutdown current

0.1

1

µA

Oscillator

Fosc

Operation Frequency

0.8

1

1.3

MHz

Dmax

Maximum Duty Cycle

92

%

Reference Voltage

Feedback Voltage

285

300

315

mV

MOSFET

Rds (on) On resistance of MOSFET

1

2

Ω

ILX

Current Limit

0.5

0.75

1.6

A

Control and Protection

Shutdown Voltage

0.4

0.7

V

Enable Voltage

0.7

1.2

V

EN Pin Pull Low Current

0.1

1

µA

OVP

OVP Threshold

37

38.5

40

V