RT8287A 查看數據表（PDF） - Richtek Technology
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RT8287A Datasheet PDF : 14 Pages
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RT8287A
Absolute Maximum Ratings (Note 1)
z Supply Input Voltage, VIN ---------------------------------------------------------------------------------- −0.3V to 26V
z Switch Voltage, SW ----------------------------------------------------------------------------------------- −0.3V to (VIN + 0.3V)
z Boot Voltage, BOOT ----------------------------------------------------------------------------------------- (SW − 0.3V) to (SW + 6V)
z Other Pins ------------------------------------------------------------------------------------------------------ −0.3V to 6V
z Power Dissipation, PD @ TA = 25°C
WDFN-14L 4x3 ------------------------------------------------------------------------------------------------ 1.667W
z Package Thermal Resistance (Note 2)
WDFN-14L 4x3, θJA ------------------------------------------------------------------------------------------ 60°C/W
WDFN-14L 4x3, θJC ------------------------------------------------------------------------------------------ 7°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 ---------------------------------------------------------------------------------- 4.5V to 21V
z Junction Temperature Range ------------------------------------------------------------------------------- −40°C to 125°C
z Ambient Temperature Range ------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(VIN = 12V, TA = 25°C unless otherwise specified)
Parameter
Symbol
Shutdown Current
ISHDN
Quiescent Current
IQ
Upper Switch On Resistance RDS(ON)1
Lower Switch On Resistance RDS(ON)2
Switch Leakage
ILEAK
Current Limit
ILIMIT
Oscillator Frequency
fSW
Short Circuit Frequency
Maximum Duty Cycle
DMAX
Minimum On Time
tON
Feedback Voltage
VFB
Feedback Current
IFB
EN Threshold Logic-High VIH
Voltage
Logic-Low
VIL
Enable Current
Test Conditions
VEN = 0
VEN = 2V, VFB = 1V
VEN = 0V, VSW = 0V or 12V
VBOOT − VSW = 4.8V
VFB = 0.75V
VFB = 0V
VFB = 0.8V
4.5V ≤ VIN ≤ 21V
VEN = 2V
VEN = 0V
Min Typ Max Unit
--
0
1 μA
-- 0.7 -- mA
-- 120 -- mΩ
-- 40 -- mΩ
--
0
10 μA
6.2 7
--
A
425 500 575 kHz
-- 150 -- kHz
--
90
--
%
-- 100 -- ns
0.796 0.808 0.82 V
-- 10 50 nA
2
-- 5.5
V
--
-- 0.4
--
1
--
μA
--
0
--
Copyright ©2012 Richtek Technology Corporation. All rights reserved.
www.richtek.com
4
is a registered trademark of Richtek Technology Corporation.
DS8287A-03 June 2012
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