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
VEN = 0V
= 3 V, V = 1V
Min
--
Typ
0.5
0.8
Max
3
Unit
μA
mA
V
Shutdown Supply Current
Supply Current
I
V
--
1.2
CC
EN
FB
Feedback Voltage
V
FB
4.5V ≤ V ≤ 23V
0.909 0.923 0.937
IN
Error Amplifier Transconductance
High Side Switch-On Resistance
Low Side Switch-On Resistance
High Side Switch Leakage Current
Upper Switch Current Limit
Low Switch Current Limit
G
ΔIC = ±10μA
--
--
--
--
--
--
940
130
130
0
--
--
μA/V
mΩ
mΩ
μA
A
EA
R
DS(ON)1
DS(ON)2
R
--
V
= 0V, V
= 0V
10
--
EN
SW
Min.Duty Cycle, V
= 4.8V
4.3
1.3
BOOT−SW
From Drain to Source
--
A
COMP to Current Sense
Transconductance
G
--
4
--
A/V
kHz
CS
Oscillator Frequency
f
f
300
340
380
OSC1
Short Circuit Oscillation
Frequency
V
= 0V
FB
--
100
--
kHz
OSC2
Copyright 2012 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
4
DS8284N-03 May 2012
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
