rt8070 Richtek Technology Corporation, rt8070 Datasheet - Page 4

• Manufacturer Part Number: rt8070
• Description: 4a, 2mhz, Synchronous Step-down Converter
• Manufacturer: Richtek Technology Corporation

Absolute Maximum Ratings
RT8070
Recommended Operating Conditions
Electrical Characteristics
(V
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4
Feedback Reference
Voltage
DC Bias Current
Output Voltage Line
Regulation
Output Voltage Load
Regulation
Error Amplifier
Trans-conductance
Current Sense
Trans-resistance
Switching Frequency
Enable Threshold Voltage
Switch On-Resistance, High R
Switch On-Resistance, Low R
SOP-8 (Exposed Pad) ---------------------------------------------------------------------------------------------- 1.333W
WDFN-8L 3x3 --------------------------------------------------------------------------------------------------------- 1.429W
Supply Input Voltage, V
LX Pin Switch Voltage ----------------------------------------------------------------------------------------------- −0.3V to (V
Other I/O Pin Voltages ---------------------------------------------------------------------------------------------- −0.3V to (V
LX Pin Switch Current ----------------------------------------------------------------------------------------------- 5A
Power Dissipation, P
Package Thermal Resistance (Note 2)
SOP-8 (Exposed Pad), θ
SOP-8 (Exposed Pad), θ
WDFN-8L 3x3, θ
WDFN-8L 3x3, θ
Junction Temperature ------------------------------------------------------------------------------------------------ 150°C
Lead Temperature (Soldering, 10 sec.) -------------------------------------------------------------------------- 260°C
Storage Temperature Range --------------------------------------------------------------------------------------- −65°C to 150°C
ESD Susceptibility (Note 3)
HBM (Human Body Mode) ----------------------------------------------------------------------------------------- 2kV
MM (Machine Mode) ------------------------------------------------------------------------------------------------- 200V
Supply Input Voltage, V
Junction Temperature Range --------------------------------------------------------------------------------------- −40°C to 125°C
Ambient Temperature Range --------------------------------------------------------------------------------------- −40°C to 85°C
IN
= 3.3V, T
Parameter
A
= 25°C, unless otherwise specified)
JA
JC
---------------------------------------------------------------------------------------------------- 70°C/W
---------------------------------------------------------------------------------------------------- 8.2°C/W
D
@ T
IN
IN
JA
JC
------------------------------------------------------------------------------------------- −0.3V to 6V
------------------------------------------------------------------------------------------- 2.7V to 5.5V
A
----------------------------------------------------------------------------------------- 75°C/W
---------------------------------------------------------------------------------------- 15°C/W
= 25°C
V
R
V
V
gm
Symbol
REF
IH
IL
T
DS(ON)_P
DS(ON)_N
Active, V
Shutdown
V
0A < I
R
Switching
EN Rising
EN Falling
I
I
LX
LX
(Note 1)
IN
OSC
= 0.5A
= 0.5A
= 2.7V to 5.5V
LOAD
= 300k
Test Conditions
FB
< 4A
= 0.78V, Not Switching
(Note 4)
0.784
Min
0.8
0.2
1.6
--
--
--
--
--
--
--
--
--
0.25
Typ
460
400
110
0.8
0.1
0.3
70
--
1
--
--
--
DS8070-03 March 2011
0.816
To be continued
Max
180
120
1.2
0.4
10
--
--
--
--
--
--
2
IN
IN
+ 0.3V)
+ 0.3V)
μA/V
Unit
MHz
%/V
mΩ
mΩ
μA
%
V
Ω
V