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| RT8055 Datasheet, PDF (4/14 Pages) Richtek Technology Corporation – 3A, 2MHz, Synchronous Step-Down Converter | |||
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RT8055
Absolute Maximum Ratings (Note 1)
z Supply Input Voltage, VDD, PVDD ---------------------------------------------------------------------------- â0.3V to 6.5V
z LX Pin Switch Voltage -------------------------------------------------------------------------------------------- â0.3V to (PVDD + 0.3V)
<10ns ---------------------------------------------------------------------------------------------------------------- â5V to 8.5V
z Other I/O Pin Voltages ------------------------------------------------------------------------------------------- â0.3V to 6.5V
z LX Pin Switch Current -------------------------------------------------------------------------------------------- 4A
z Power Dissipation, PD @ TA = 25°C
WDFN-10L 3x3 ----------------------------------------------------------------------------------------------------- 1.667W
SOP-8 (Exposed Pad) ------------------------------------------------------------------------------------------- 1.333W
z 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
z Junction Temperature --------------------------------------------------------------------------------------------- 150°C
z Lead Temperature (Soldering, 10 sec.) ----------------------------------------------------------------------- 260°C
z Storage Temperature Range ------------------------------------------------------------------------------------ â65°C to 150°C
z ESD Susceptibility (Note 3)
HBM (Human Body Model) -------------------------------------------------------------------------------------- 2kV
Recommended Operating Conditions (Note 4)
z Supply Input Voltage ---------------------------------------------------------------------------------------------- 2.6V to 5.5V
z Junction Temperature Range ------------------------------------------------------------------------------------ â40°C to 125°C
z Ambient Temperature Range ------------------------------------------------------------------------------------ â40°C to 85°C
Electrical Characteristics
(VDD = 3.3V, TA = 25°C, unless otherwise specified)
Parameter
Symbol
Test Conditions
Input Voltage Range
VDD
Feedback Reference Voltage
Feedback Leakage Current
DC Bias Current
VREF
IFB
VFB = 3.3V
Active , VFB = 0.7V, Not Switching
Shutdown
Output Voltage Line Regulation ÎVLINE
Output Voltage Load Regulation ÎVLOAD
Error Amplifier
Transconductance
gm
VIN = 2.6V to 5.5V
VIN = 5V, VOUT = 3.3V,
IOUT = 0A to 3A
Current Sense Transresistance RS
RT Leakage Current
SHDN/RT = VIN = 5.5V
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
Copyright ©2012 Richtek Technology Corporation. All rights reserved.
www.richtek.com
4
is a registered trademark of Richtek Technology Corporation.
DS8055-05 November 2012
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