RT9385
Absolute Maximum Ratings (Note 1)
z Supply Input Voltage, VIN ------------------------------------------------------------------------------------------------ −0.3V to 5V
z Power Dissipation, PD @ TA = 25°C
WQFN-16L 2x3 ------------------------------------------------------------------------------------------------------------ 1.111W
z Package Thermal Resistance (Note 2)
WQFN-16L 2x3, θJA ------------------------------------------------------------------------------------------------------- 90°C/W
WQFN-16L 2x3, θJC ------------------------------------------------------------------------------------------------------ 15°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 Mode) ---------------------------------------------------------------------------------------------- 2kV
MM (Machine Mode) ------------------------------------------------------------------------------------------------------ 200V
Recommended Operating Conditions (Note 4)
z Junction Temperature Range-------------------------------------------------------------------------------------------- −40°C to 125°C
z Ambient Temperature Range-------------------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(VIN = 3.6V, VF = 3.5V, CIN = COUT = 1uF, CFLY1 = CFLY2 = 1μF, ILED1 to LED5 = 25mA, TA = 25°C, unless otherwise specified)
Parameter
Input Power Supply
Input Supply Voltage
Symbol
Test Conditions
Min
Typ
Max
Unit
VIN
2.8
1.8
--
2
4.5
2.5
V
V
Under-Voltage Lockout
Threshold
VUVLO
VIN Rising
Under-Voltage Lockout
Hysteresis
ΔVUVLO
--
100
--
mV
Quiescent Current
Shutdown Current
IQ
x1 Mode
--
--
1
2
2
mA
ISHDN
VIN = 4.5V
0.4
μA
LED Current
LED Current Accuracy
Current Matching
ILEDx
ILEDx = 25mA
ILEDx = 25mA
−5
−2
0
0
+5
+2
%
%
Charge Pump
Oscillator Frequency
PWM Dimming Frequency
Internal CF Resistance
Mode Decision
fOSC
--
1
--
1000
--
--
200
--
kHz
kHz
kΩ
160
x1 Mode to x1.5 Mode
Transition Voltage (VIN Falling)
IOUT = 125mA, ILEDx = 25mA.
IOUT = 125mA, ILEDx = 25mA.
--
--
3.65
200
3.8
--
V
Mode Transition Hystersis
mV
To be continued
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DS9385-01 April 2011
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
