RT8064
4
DS8064-07 November 2012www.richtek.com
©
Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
Absolute Maximum Ratings (Note 1)
z Supply Input Voltage, VIN --------------------------------------------------------------------------------------- −0.3V to 6V
z LX Pin Switch Voltage -------------------------------------------------------------------------------------------- −0.3V to (V
IN
+ 0.3V)
<10ns ---------------------------------------------------------------------------------------------------------------- −5V to 8.5V
z Other I/O Pin Voltages ------------------------------------------------------------------------------------------- −0.3V to (V
IN
+ 0.3V)
z LX Pin Switch Current -------------------------------------------------------------------------------------------- 5A
z Power Dissipation, P
D
@ T
A
= 25°C
SOP-8 (Exposed Pad) ------------------------------------------------------------------------------------------- 1.333W
WDFN-8L 3x3 ------------------------------------------------------------------------------------------------------ 1.429W
z Package Thermal Resistance (Note 2)
SOP-8 (Exposed Pad), θ
JA
-------------------------------------------------------------------------------------- 75°C/W
SOP-8 (Exposed Pad), θ
JC
------------------------------------------------------------------------------------- 15°C/W
WDFN-8L 3x3, θ
JA
------------------------------------------------------------------------------------------------- 70°C/W
WDFN-8L 3x3, θ
JC
------------------------------------------------------------------------------------------------- 8.2°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 Model)-------------------------------------------------------------------------------------- 2kV
Electrical Characteristics
(V
IN
= 3.3V, T
A
= 25°C, unless otherwise specified)
Recommended Operating Conditions (Note 4)
z Supply Input Voltage, VIN ---------------------------------------------------------------------------------------2.7V to 5.5V
z Junction Temperature Range ------------------------------------------------------------------------------------
−40°C to 125°C
z Ambient Temperature Range------------------------------------------------------------------------------------
−40°C to 85°C
Parameter Symbol Test Conditions Min Typ Max Unit
Feedback Reference Voltage V
REF
0.784 0.8 0.816 V
Active , V
FB
= 0.78V, Not Switching -- 460 --
DC Bias Current
Shutdown -- -- 10
μA
Output Voltage Line Regulation V
IN
= 2.7V to 5.5V -- 0.1 -- %/V
Output Voltage Load Regulation 0A < I
LOAD
< 2A -- 0.25 -- %
Error Amplifier Trans-conductance gm -- 400 -- μA/V
Current Sense Trans-resistance -- 0.3 -- Ω
R
OSC
= 330kΩ 0.8 1 1.2
Switching Frequency
Switching 0.2 -- 2
MHz
Logic-High V
IH
1.6 -- --
EN Input Voltage
Logic-Low V
IL
-- -- 0.4
V
