RT9287 Просмотр технического описания (PDF) - Richtek Technology
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RT9287 Datasheet PDF : 13 Pages
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RT9287
Preliminary
Absolute Maximum Ratings (Note 1)
z Supply Input Voltage, VDD ----------------------------------------------------------------------------------------------- −0.3V to 7V
z LX Input Voltage ----------------------------------------------------------------------------------------------------------- −0.3V to 22V
z The Other Pins ------------------------------------------------------------------------------------------------------------- −0.3V to 6V
z Power Dissipation, PD @ TA = 25°C
WDFN−10L 3x3 ------------------------------------------------------------------------------------------------------------ 0.926W
z Package Thermal Resistance (Note 4)
WDFN−10L 3x3, θJA ------------------------------------------------------------------------------------------------------ 108°C/W
WDFN−10L 3x3, θJC ------------------------------------------------------------------------------------------------------ 8.2°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 2)
HBM (Human Body Mode) ---------------------------------------------------------------------------------------------- 2kV
MM (Machine Mode) ------------------------------------------------------------------------------------------------------ 200V
Recommended Operating Conditions (Note 3)
z Supply Input Voltage Range -------------------------------------------------------------------------------------------- 2.7V to 5.5V
z Junction Temperature Range -------------------------------------------------------------------------------------------- −40°C to 125°C
z Ambient Temperature Range ------------------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(VDD2 = 3.7V, VDD1 = VOUT + 1V, VEN = VIN, CIN = COUT = 1μA, TA = 25°C, unless otherwise specified)
Parameter
Symbol
Test Condition
Min Typ Max
Boost
System Supply Input
Operating Voltage Range
Under Voltage Lockout
Quiescent Current
Supply Current
Shut Down Current
Line Regulation
O scilla tor
VDD2
VDD2
IDD2
IDD2
IDD2
VFB = 1.5V, No switch
VFB = 0V, Switch
VENB < 0.4V
VDD2 = 3.0V to 4.3V
2.7
--
5 .5
--
2.2
--
-- 300 --
--
2
--
--
--
1
--
3
--
Operating Frequency
Maximum Duty Cycle
fOSC
--
1.2
--
85
--
--
Reference Voltage
Feedback Reference Voltage
MOSFET
VREF
1.173 1.235 1.296
On Resistance of MOSFET
OCP
RDS(ON)
-- 0.75 --
--
750 --
Enable Voltage Low
VEN_L
--
--
0.4
Enable Voltage High
VEN_H
1.5 --
--
Units
V
V
μA
mA
μA
%
M Hz
%
V
Ω
mA
V
V
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4
To be continued
DS9287-01 August 2007
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