RT8055 datasheet(4/14 Pages) RICHTEK

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RT8055

DS8055-05

November 2012

www.richtek.com

is a registered trademark of Richtek Technology Corporation.

Absolute Maximum Ratings

(Note 1)

Supply Input Voltage, VDD, PVDD ----------------------------------------------------------------------------

−0.3V to 6.5V

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

−0.3V to (PVDD+ 0.3V)

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

−5V to 8.5V

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

−0.3V to 6.5V

LX Pin Switch Current -------------------------------------------------------------------------------------------- 4A

Power Dissipation, PD @ TA = 25

°C

WDFN-10L 3x3 ----------------------------------------------------------------------------------------------------- 1.667W

SOP-8 (Exposed Pad) ------------------------------------------------------------------------------------------- 1.333W

Package Thermal Resistance (Note 2)

WDFN-10L 3x3,

θJA ----------------------------------------------------------------------------------------------- 60°C/W

WDFN-10L 3x3,

θJC ----------------------------------------------------------------------------------------------- 7.8°C/W

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

(VDD = 3.3V, TA = 25

°C, unless otherwise specified)

Recommended Operating Conditions

(Note 4)

Supply Input Voltage ---------------------------------------------------------------------------------------------- 2.6V 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

Input Voltage Range

VDD

2.6

5.5

Feedback Reference Voltage

VREF

0.784

0.8

0.816

Feedback Leakage Current

IFB

VFB = 3.3V

0.1

μA

Active , VFB = 0.7V, Not Switching

500

μA

DC Bias Current

Shutdown

μA

Output Voltage Line Regulation

ΔV

LINE

VIN = 2.6V to 5.5V

0.1

%/V

Output Voltage Load Regulation

ΔV

LOAD

VIN = 5V, VOUT = 3.3V,

IOUT = 0A to 3A

0.4

Error Amplifier

Transconductance

400

μA/V

Current Sense Transresistance

0.4

RT Leakage Current

SHDN/RT = VIN = 5.5V

μA

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