RT8857 데이터 시트보기 (PDF) - Richtek Technology

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RT8857

4/3/2/1-Phase PWM Controller with Embedded Drivers for CPU Core Power Supply

Richtek Technology 

RT8857/A

Absolute Maximum Ratings (Note 1)

z Supply Input Voltage -------------------------------------------------------------------------------------------- −0.3V to 15V

z BOOTx to PHASEx --------------------------------------------------------------------------------------------- −0.3V to 15V

z BOOTx to GND

DC ------------------------------------------------------------------------------------------------------------------- −0.3V to 30V

< 200ns ------------------------------------------------------------------------------------------------------------ −0.3V to 42V

z PHASEx to GND

DC ------------------------------------------------------------------------------------------------------------------- −2V to 15V

< 200ns ------------------------------------------------------------------------------------------------------------ −5V to 30V

z Input/Output Voltage -------------------------------------------------------------------------------------------- −0.3V to (VCC5 +0.3)V

z Power Dissipation, PD @ TA = 25°C

WQFN−48L 7x7 -------------------------------------------------------------------------------------------------- 3.226W

z Package Thermal Resistance (Note 2)

WQFN−48L 7x7, θJA -------------------------------------------------------------------------------------------- 31°C/W

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

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

z ESD Susceptibility (Note 3)

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

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

Recommended Operating Conditions (Note 4)

z Supply Voltage, VCC12 ---------------------------------------------------------------------------------------- 12V ± 10%

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

z Ambient Temperature Range ---------------------------------------------------------------------------------- 0°C to 70°C

Electrical Characteristics

(VCC12 = 12V, VGND = 0V, TA = 25°C, unless otherwise specified)

Parameter

Symbol

Test Conditions

VCC12 Supply Input

VCC12 Supply Voltage

VCC12

VCC12 Supply Current

ICC

VCC5 Power

VCC5 Supply Voltage

VCC5 Output Sourcing

Power-On Reset

VCC5

IVCC5

ILOAD = 10mA (Note 5)

VCC12 Rising Threshold

VCC12 Hysteresis

Load Current Monitor

IMON Maximum Output

Voltage

EN/VTT

EN/VTT Rising Threshold

Enable Hysteresis

VVCC12TH VCC12 Rising

VVCC12HY VCC12 Falling

VENVTT EN/VTT Rising

VENVTTHY EN/VTT Falling

Min Typ Max Unit

10.8 12 13.2 V

--

6

-- mA

4.75 5.0 5.25 V

10

--

-- mA

9.2

9.6 10.0 V

--

0.9

--

V

--

VTT

--

V

(Note 6)

0.80 0.85 0.90 V

--

100

-- mV

DS8857/A-01 April 2011

To be continued

www.richtek.com

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