RT8511B Datasheet, PDF (4/11 Pages) Richtek Technology Corporation – 43V Asynchronous Boost WLED Driver

RT8511B
Absolute Maximum Ratings (Note 1)
 VIN, EN, PWM, DIMC to GND ------------------------------------------------------------------------------------------ −0.3V to 26.5V
 FB, OVP to GND ---------------------------------------------------------------------------------------------------------- −0.3V to 48V
 LX to GND ------------------------------------------------------------------------------------------------------------------ −0.3V to 48V
< 500ns ---------------------------------------------------------------------------------------------------------------------- −1V to 48V
 Power Dissipation, P_D @ T_A = 25°C
WDFN-8L 2x2 -------------------------------------------------------------------------------------------------------------- 0.833W
 Package Thermal Resistance (Note 2)
WDFN-8L 2x2, θ_JA --------------------------------------------------------------------------------------------------------- 120°C/W
WDFN-8L 2x2, θ_JC --------------------------------------------------------------------------------------------------------- 8.2°C/W
 Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------- 260°C
 Junction Temperature ----------------------------------------------------------------------------------------------------- 150°C
 Storage Temperature Range -------------------------------------------------------------------------------------------- –65°C to 150°C
 ESD Susceptibility (Note 3)
HBM (Human Body Model) ---------------------------------------------------------------------------------------------- 2kV
MM (Machine Model) ----------------------------------------------------------------------------------------------------- 200V
Recommended Operating Conditions (Note 4)
 Supply Input Voltage, V_IN ------------------------------------------------------------------------------------------------ 2.7V to 24V
 Junction Temperature Range -------------------------------------------------------------------------------------------- −40°C to 125°C
 Ambient Temperature Range -------------------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(VIN = 4.5V, TA = 25°C, unless otherwise specified)
Parameter
Symbol
Test Conditions
VIN Quiescent Current
IQ
IQ_SW
VFB = 1.5V, No Switching
VFB = 0V, Switching
VIN Shutdown Current
ISHDN
VIN = 4.5V, VEN = 0V
Control Input
EN, PWM
Logic-High VIH
Threshold Voltage _{Logic-Low VIL}
VIN = 2.7V to 24V
VIN = 2.7V to 24V
EN Sink Current
IIH
VEN = 3V
Shutdown Delay
tSHDN
EN high to low
PWM Dimming Frequency
Boost Converter
Switching Frequency
LX On Resistance
(N-MOSFET)
Minimum ON Time
fOSC
RDS(ON)
VIN = 2.7V to 24V
VIN > 5V
Maximum Duty Cycle
DMAX
VFB = 0V, Switching
Min Typ Max Unit
-- 725 -- A
--
-- 2.2 mA
--
1
4 A
1.6
--
--
V
--
-- 0.8
1
-- 10 A
52 64 80 ms
0.1 --
8 kHz
0.4 0.5 0.6 MHz
-- 0.4 0.6 
--
60
--
ns
--
92
--
%
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DS8511B-05 February 2015