RT9270 데이터 시트보기 (PDF) - Richtek Technology
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RT9270 Datasheet PDF : 13 Pages
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RT9270
Preliminary
Absolute Maximum Ratings (Note 1)
z Supply Voltage, VIN --------------------------------------------------------------------------------------------------- −0.3 to 6V
z LX to GND --------------------------------------------------------------------------------------------------------------- − 0.3V to 16V
z The other pins ---------------------------------------------------------------------------------------------------------- − 0.3V to 6V
z Power Dissipation, PD @ TA = 70°C
MSOP-8 ----------------------------------------------------------------------------------------------------------------- 300mW
z Junction Temperature ------------------------------------------------------------------------------------------------- 150°C
z Lead Temperature (Soldering, 10 sec.) --------------------------------------------------------------------------- 260°C
z Operation Temperature Range -------------------------------------------------------------------------------------- −40°C to 85°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 Ambient Temperature Range ---------------------------------------------------------------------------------------- 0°C to 70°C
z Junction Temperature Range ---------------------------------------------------------------------------------------- 0°C to 125°C
Electrical Characteristics
(VIN = 3V, FREQ left floating, TA = 25°C, Unless Otherwise specification)
Parameter
Symbol
Test Condition
System Supply Input
Operation voltage Range
Under Voltage Lock Out
VIN
UVLO
FREQ = GND
FREQ = VIN
Power On Reset Hysteresis
Quiescent Current
IIN
IIN
Shut Down Current
IIN
Soft start Current
ISS
Switching Regulator Oscillator
VFB=1.3V, No switching
VFB=1.0V, Switching, No load
EN = GND
Free Run Frequency
fOSC
Maximum Duty Cycle (Note 4)
Reference Voltage
FREQ=GND
FREQ= VIN
FREQ = GND
FREQ = VIN
Feedback Voltage
VFB
Error Amplifier
GM
(Note 4)
Feedback Voltage Line Regulation
2.3V<VIN<5.5V
Min
2.3
2.5
2
--
--
--
--
--
520
960
82
74
1.216
--
--
Typ Max Units
--
5.5
V
--
5.5
2.2
2.3
V
200
--
mV
270 600 uA
1.76
5
mA
--
1
uA
4
9
uA
670 850 kHz
1300 1500 kHz
90
96
%
77
80
1.24 1.264 V
1.1
--
ms
0.12 0.3 %/V
To be continued
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4
DS9270-09 March 2007
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