RT8056
3
DS8056-02 April 2011 www.richtek.com
Absolute Maximum Ratings (Note 1)
z Supply Input Voltage, V
IN
-----------------------------------------------------------------------------------------------------------------------------------
−0.3V to 6.5V
z LX1, LX2 Pin Voltages ----------------------------------------------------------------------------------------------- −0.3V to (V
IN
+0.3V)
z Other I/O Pin Voltages ---------------------------------------------------------------------------------------------- −0.3V to 6.5V
z Power Dissipation, P
D
@ T
A
= 25°C
WDFN-10L 3x3 -------------------------------------------------------------------------------------------------------- 1.429W
z Package Thermal Resistance (Note 2)
WDFN-10L 3x3, θ
JA
-------------------------------------------------------------------------------------------------- 70°C/W
WDFN-10L 3x3, θ
JC
-------------------------------------------------------------------------------------------------- 8.2°C/W
z Lead Temperature (Soldering, 10 sec.) -------------------------------------------------------------------------- 260°C
z Junction Temperature ------------------------------------------------------------------------------------------------ 150°C
z Storage Temperature Range --------------------------------------------------------------------------------------- −65°C to 150°C
z ESD Susceptibility (Note 3)
HBM --------------------------------------------------------------------------------------------------------------------- 2kV
MM ----------------------------------------------------------------------------------------------------------------------- 200V
Recommended Operating Conditions (Note 4)
z Supply Input Voltage, V
IN
------------------------------------------------------------------------------------------- 2.8V to 5.5V
z Junction Temperature Range --------------------------------------------------------------------------------------- −40°C to 125°C
z Ambient Temperature Range --------------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
Parameter Symbol Test Conditions Min Typ Max Unit
Quiescent Current I
Q
-- 300 -- μA
Feedback Reference Voltage V
REF
0.588 0.6 0.612 V
V
IN
Rising -- 2.1 -- V
Under Voltage Lockout Threshold V
UVLOH
Hysteresis -- 0.18 -- V
Shutdown Current I
SHDN
-- 0.1 1 μA
Switching Frequency 1.2 1.5 1.8 MHz
Logic High V
IH
1.5 -- V
IN
V
ENx Threshold
Voltage
Logic Low V
IL
-- -- 0.4 V
Peak Current Limit I
LIM
V
IN
= 2.8V to 5.5V 1.1 1.5 -- A
Output Voltage Line Regulation V
IN
= 2.8V to 5.5V -- 0.04 0.4 %V
Output Voltage Load Regulation 0mA < I
LOAD
< 1A (Note5) -- 1 -- %
Switch On-Resistance, High R
DS(ON)_H
I
SW
= 0.2A -- 280 -- mΩ
Switch On Resistance, Low R
DS(ON)_L
I
SW
= 0.2A -- 290 -- mΩ
Thermal Shutdown Temperature T
SD
-- 138 -- °C
Thermal Shutdown Hysteresis -- 18 -- °C
(V
IN
= 3.6V, T
A
= 25°C unless otherwise specified)
