RT8074 datasheet(3/10 Pages) RICHTEK

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RT8074

DS8074-07

November 2012

www.richtek.com

is a registered trademark of Richtek Technology Corporation.

Absolute Maximum Ratings

(Note 1)

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

−0.3V to 6.5V

LX Pin Switch Voltage --------------------------------------------------------------------------------------------

−0.3V to (VIN + 0.3V)

<10ns ----------------------------------------------------------------------------------------------------------------

−5V to 8.5V

Other I/O Pin Voltages -------------------------------------------------------------------------------------------

−0.3V to (VIN + 0.3V)

LX Pin Switch Current -------------------------------------------------------------------------------------------- 5A

Power Dissipation, PD @ TA = 25

°C

SOP-8 (Exposed Pad) ------------------------------------------------------------------------------------------- 1.33W

Package Thermal Resistance (Note 2)

SOP-8 (Exposed Pad),

θJA -------------------------------------------------------------------------------------- 75°C/W

SOP-8 (Exposed Pad),

θJC ------------------------------------------------------------------------------------- 15°C/W

Junction Temperature --------------------------------------------------------------------------------------------- 150

°C

Lead Temperature (Soldering, 10 sec.) ----------------------------------------------------------------------- 260

°C

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

−65°C to 150°C

ESD Susceptibility (Note 3)

HBM (Human Body Model) -------------------------------------------------------------------------------------- 2kV

Electrical Characteristics

(VIN = 3.3V, TA = 25

°C, unless otherwise specified)

Recommended Operating Conditions

(Note 4)

Supply Input Voltage, VIN --------------------------------------------------------------------------------------- 2.7V to 5.5V

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

−40°C to 125°C

Ambient Temperature Range ------------------------------------------------------------------------------------

−40°C to 85°C

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

Feedback Reference Voltage

VREF

0.784

0.8

0.816

Active , VFB = 0.78V,

Not Switching

460

DC Bias Current

Shutdown

μA

Output Voltage Line Regulation

VIN = 2.7V to 5.5V

0.1

%/V

Output Voltage Load Regulation

0A < ILOAD < 4A

0.25

Error Amplifier

Trans-conductance

400

μA/V

Current Sense Trans-resistance

0.3

ROSC = 330kΩ

0.8

1.2

Switching Frequency

fSW

Switching

0.2

MHz

Logic-High

VIH

1.6

EN Input

Voltage

Logic-Low

VIL

0.4

Switch On Resistance, High

RDS(ON)_P

ILX = 0.5A

110

180

Switch On Resistance, Low

RDS(ON)_N ILX = 0.5A

120

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