RT8284N 查看數據表（PDF） - Richtek Technology
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RT8284N Datasheet PDF : 15 Pages
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RT8284N
Absolute Maximum Ratings (Note 1)
Supply Voltage, VIN ----------------------------------------------------------------------------------------------- −0.3V to 25V
Input Voltage, SW -------------------------------------------------------------------------------------------------- −0.3V to (VIN + 0.3V)
<20ns ----------------------------------------------------------------------------------------------------------------- −3V to (VIN + 3V)
VBOOT − VSW --------------------------------------------------------------------------------------------------------- −0.3V to 6V
Other Pins Voltages ----------------------------------------------------------------------------------------------- −0.3V to 6V
Power Dissipation, PD @ TA = 25°C
SOP-8 ----------------------------------------------------------------------------------------------------------------- 1.111W
SOP-8 (Exposed Pad) -------------------------------------------------------------------------------------------- 1.333W
Package Thermal Resistance (Note 2)
SOP-8, θJA ----------------------------------------------------------------------------------------------------------- 90°C/W
SOP-8 (Exposed Pad), θJA --------------------------------------------------------------------------------------- 75°C
SOP-8 (Exposed Pad), θJC -------------------------------------------------------------------------------------- 15°C
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 Model) --------------------------------------------------------------------------------------- 2kV
Recommended Operating Conditions (Note 4)
Supply Voltage, VIN ----------------------------------------------------------------------------------------------- 4.5V to 23V
Junction Temperature Range ------------------------------------------------------------------------------------- −40°C to 125°C
Ambient Temperature Range ------------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(VIN = 12V, TA = 25°C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Shutdown Supply Current
VEN = 0V
--
Supply Current
ICC
VEN = 3 V, VFB = 1V
--
Feedback Voltage
VFB
4.5V ≤ VIN ≤ 23V
0.909
Error Amplifier Transconductance GEA
ΔIC = ±10μA
--
High Side Switch-On Resistance RDS(ON)1
--
Low Side Switch-On Resistance RDS(ON)2
--
High Side Switch Leakage Current
VEN = 0V, VSW = 0V
--
Upper Switch Current Limit
Min.Duty Cycle, VBOOT−SW = 4.8V --
Low Switch Current Limit
From Drain to Source
--
COMP to Current Sense
Transconductance
GCS
--
Oscillator Frequency
fOSC1
300
Short Circuit Oscillation
Frequency
fOSC2
VFB = 0V
--
Typ
0.5
0.8
0.923
940
130
130
0
4.3
1.3
4
340
100
Max
3
1.2
0.937
--
--
--
10
--
--
--
380
--
Unit
μA
mA
V
μA/V
mΩ
mΩ
μA
A
A
A/V
kHz
kHz
Copyright ©2012 Richtek Technology Corporation. All rights reserved.
www.richtek.com
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is a registered trademark of Richtek Technology Corporation.
DS8284N-03 May 2012
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