EUP2571 datasheet(4/14 Pages) EUTECH

Part #	EUP2571

Description	White LED Step-Up Converter In Tiny SOT-23 Package

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Manufacturer	EUTECH [Eutech Microelectronics Inc]

Direct Link	http://www.eutechmicro.com

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EUP2571

DS2571

Ver1.1

May. 2007

4

Absolute Maximum Ratings

Supply Voltage ,VIN -----------------------------------------------------------------

-0.3V to 6V

LX,OUT

-----------------------------------------------------------------------------

-0.3V to 30V

The Other Pins

----------------------------------------------------------------------

-0.3V to 6V

Power dissipation, PD@ TA=25°C

SOT23-6 -------------------------------------------------------------------------------

0.4W

Package Thermal Resistance

SOT23-6,θJA -------------------------------------------------------------------------

250°C/W

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

125°C

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

260°C

Storage Temperature Range ------------------------------------------------------- -65°C to 150°C

Operating Conditions

Junction Temperature Range ---------------------------------------------------

-40°C to 125°C

Supply Voltage , VIN-----------------------------------------------------------------

2.6V to 5.5V

Electrical Characteristics

(VIN =3.6V, VOUT=12V, COUT=1µF, CIN=1µF, RSENSE=12Ω, TA=-40°C to 85°C. Unless otherwise noted.

Typical values are at TA= 25°C)

EUP2571

Symbol

Parameter

Conditions

Min

Typ

Max.

Unit

Supply Voltage

--

6

V

UVLO

Under voltage Lock Out

VIN rising or falling

2.2

2.4

2.6

V

Maximum Output Voltage

--

26

V

ICC1

Supply Current

VCC=6V, Continuous Switching

--

0.8

1.5

mA

ICC2

Quiescent Current

VCC=6V, FB=1.3V, No Switching

--

115

250

µA

ICC3

Shut Down current

VCC=6V, VEN<0.4V

--

0.1

1

µA

Oscillator

Fosc

Operation Frequency

0.8

1.1

1.3

MHz

Dmax

Maximum Duty Cycle

89

92

96

%

Reference Voltage

TA=25℃

237

250

263

VFB

Feedback Voltage

TA=-40°C to 85°C

230

250

270

mV

MOSFET

Rds (on) On resistance of MOSFET

--

1.05

1.5

Ω

ILX

Current Limit

0.4

0.75

1.2

A

Control and Protection

VEN1

Shut Down Voltage

0.4

0.7

--

V

VEN2

Enable Voltage

--

0.7

1.2

V

IEN

EN Pin Pull Low Current

--

0.1

µA

Falling

24.5

25.7

26.5

OVP

OVP Threshold

Rising

26.1

27.3

28.1

V

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