RT8284N
Parameter
Maximum Duty Cycle
Symbol
DMAX
tON
Test Conditions
Min
Typ
Max
Unit
%
V
= 0.7V
--
93
--
FB
Minimum On-Time
--
2.7
--
100
--
--
5.5
0.4
4.5
--
ns
Logic-High
Logic-Low
V
V
V
IH
EN Input Threshold
Voltage
V
--
IL
Input Under Voltage Lockout Threshold
V
V
Rising
3.8
--
4.2
320
6
V
mV
μA
ms
°C
UVLO
IN
Input Under Voltage Lockout Hysteresis ΔV
UVLO
SS
SS
Soft-Start Current
I
t
= 0V
--
--
SS
Soft-Start Period
C
= 0.1μF
--
15.5
150
--
SS
Thermal Shutdown (Note 5)
T
--
--
SD
Note 1. Stresses beyond those listed “Absolute Maximum Ratings” may cause permanent damage to the device. These are
stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in
the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions may
affect device reliability.
Note 2. θJA is measured at TA = 25°C on a high effective thermal conductivity four-layer test board per JEDEC 51-7. θJC is
measured at the exposed pad of the package.
Note 3. Devices are ESD sensitive. Handling precaution is recommended.
Note 4. The device is not guaranteed to function outside its operating conditions..
Note 5. Guaranteed by design.
Copyright 2012 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS8284N-03 May 2012
www.richtek.com
5
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
