RT8074 查看數據表（PDF） - Richtek Technology
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RT8074 Datasheet PDF : 10 Pages
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RT8074
Absolute Maximum Ratings (Note 1)
z Supply Input Voltage, VIN --------------------------------------------------------------------------------------- −0.3V to 6.5V
z LX Pin Switch Voltage -------------------------------------------------------------------------------------------- −0.3V to (VIN + 0.3V)
<10ns ---------------------------------------------------------------------------------------------------------------- −5V to 8.5V
z Other I/O Pin Voltages ------------------------------------------------------------------------------------------- −0.3V to (VIN + 0.3V)
z LX Pin Switch Current -------------------------------------------------------------------------------------------- 5A
z Power Dissipation, PD @ TA = 25°C
SOP-8 (Exposed Pad) ------------------------------------------------------------------------------------------- 1.33W
z Package Thermal Resistance (Note 2)
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 ------------------------------------------------------------------------------------ −65°C to 150°C
z ESD Susceptibility (Note 3)
HBM (Human Body Model) -------------------------------------------------------------------------------------- 2kV
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
Electrical Characteristics
(VIN = 3.3V, TA = 25°C, unless otherwise specified)
Parameter
Symbol
Test Conditions
Feedback Reference Voltage VREF
DC Bias Current
Active , VFB = 0.78V,
Not Switching
Shutdown
Output Voltage Line Regulation
Output Voltage Load Regulation
Error Amplifier
Trans-conductance
gm
VIN = 2.7V to 5.5V
0A < ILOAD < 4A
Current Sense Trans-resistance RT
Switching Frequency
fSW
ROSC = 330kΩ
Switching
EN Input
Logic-High
VIH
Voltage
Logic-Low
VIL
Switch On Resistance, High
RDS(ON)_P ILX = 0.5A
Switch On Resistance, Low
RDS(ON)_N ILX = 0.5A
Min Typ
0.784 0.8
--
460
--
--
--
0.1
--
0.25
--
400
--
0.3
0.8
1
0.2
--
1.6
--
--
--
--
110
--
70
Max
0.816
--
10
--
--
--
--
1.2
2
--
0.4
180
120
Unit
V
μA
%/V
%
μA/V
Ω
MHz
V
mΩ
mΩ
Copyright ©2012 Richtek Technology Corporation. All rights reserved.
DS8074-07 November 2012
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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