RT8055B 查看數據表（PDF） - Richtek Technology

零件编号

产品描述 (功能)

比赛名单

RT8055B

3A, 2MHz, Synchronous Step-Down Converter

Richtek Technology 

RT8055B

Absolute Maximum Ratings (Note 1)

z Supply Input Voltage, VDD, PVDD ---------------------------------------------------------------------------- −0.3V to 6.5V

z LX Pin Switch Voltage -------------------------------------------------------------------------------------------- −0.3V to (PVDD + 0.3V)

<30ns ---------------------------------------------------------------------------------------------------------------- −5V to 7.5V

z Other I/O Pin Voltages ------------------------------------------------------------------------------------------- −0.3V to 6.5V

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

z Power Dissipation, PD @ TA = 25°C

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

z Package Thermal Resistance (Note 2)

WDFN-10L 3x3, θJA ----------------------------------------------------------------------------------------------- 60°C/W

WDFN-10L 3x3, θJC ----------------------------------------------------------------------------------------------- 7.8°C/W

z Junction Temperature --------------------------------------------------------------------------------------------- 150°C

z Lead Temperature (Soldering, 10 sec.) ----------------------------------------------------------------------- 260°C

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

z ESD Susceptibility (Note 3)

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

MM (Machine Mode) ---------------------------------------------------------------------------------------------- 200V

Recommended Operating Conditions (Note 4)

z Supply Input Voltage ---------------------------------------------------------------------------------------------- 2.6V to 5.5V

z Junction Temperature Range ------------------------------------------------------------------------------------ −40°C to 125°C

z Ambient Temperature Range ------------------------------------------------------------------------------------ −40°C to 85°C

Electrical Characteristics

(VDD = 3.3V, TA = 25°C, unless otherwise specified)

Parameter

Symbol

Test Conditions

Input Voltage Range

Feedback Reference Voltage

Feedback Leakage Current

DC Bias Current

VDD

VREF

IFB

VFB = 3.3V

Active, VFB = 0.7V, Not Switching

Shutdown

Output Voltage Line Regulation ΔVLINE

Output Voltage Load Regulation ΔVLOAD

Error Amplifier Transconductance gm

VIN = 2.6V to 5.5V

VIN = 5V, VOUT = 3.3V,

IOUT = 0A to 3A

Current Sense Transresistance

RT Leakage Current

Switching Frequency

Switch On Resistance, High

Switch On Resistance, Low

RS

SHDN/RT = VIN = 5.5V

ROSC = 180kΩ

Adjustable Switching Frequency

Range

RDS(ON)_P ISW = 0.3A

RDS(ON)_N ISW = 0.3A

Min Typ Max Unit

2.6 -- 5.5 V

0.784 0.8 0.816 V

-- -- 0.1 μA

-- 500 -- μA

--

--

1 μA

-- 0.1 -- %/V

-- 0.4 -- %

-- 400 -- μA/V

-- 0.4 -- Ω

--

--

1 μA

1.44 1.8 2.16 MHz

0.3 --

2 MHz

-- 100 160 mΩ

-- 100 170 mΩ

www.richtek.com

4

To be continued

DS8055B-03 April 2011

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