RT8282B 데이터 시트보기 (PDF) - Richtek Technology
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RT8282B Datasheet PDF : 14 Pages
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RT8282B
Absolute Maximum Ratings (Note 1)
Supply Voltage, VIN ------------------------------------------------------------------------------------------------- −0.3V to 25V
Input Voltage, SW --------------------------------------------------------------------------------------------------- −0.3V to (VIN + 0.3V)
VBOOT - VSW ----------------------------------------------------------------------------------------------------------- −0.3V to 6V
Other Pin Voltages ------------------------------------------------------------------------------------------------- −0.3V to 6V
Power Dissipation, PD @ TA = 25°C
SOP-8 (Exposed Pad) --------------------------------------------------------------------------------------------- 1.333W
Package Thermal Resistance (Note 2)
SOP-8 (Exposed Pad), θJA ---------------------------------------------------------------------------------------- 75°C/W
SOP-8 (Εxposed Pad), θJC --------------------------------------------------------------------------------------- 15°C/W
Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------- 260°C
Junction Temperature ----------------------------------------------------------------------------------------------- 150°C
Storage Temperature Range -------------------------------------------------------------------------------------- −40°C to 150°C
ESD Susceptibility (Note 3)
HBM (Human Body Mode) ---------------------------------------------------------------------------------------- 2kV
MM (Machine Mode) ------------------------------------------------------------------------------------------------ 200V
Recommended Operating Conditions (Note 4)
Supply Voltage, VIN ------------------------------------------------------------------------------------------------- 4.5V to 23V
Junction Temperature Range -------------------------------------------------------------------------------------- −40°C to 125°C
Ambient Temperature Range -------------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(VIN = 12V, TA = 25°C, unless otherwise specified)
Parameter
S ymbol
Test Conditions
Min Typ Max Unit
Shutdown Supply Current
VEN = 0V
--
0.5
3
μA
Supply Current
VEN = 3 V, VFB = 0.9V
--
0.8 1.2 mA
Feedback Voltage
Error Amplifier
Transconductance
High Side Switch
On-Resistance
Low Side Switch
On-Resistance
High Side Switch Leakage
Current
VFB
GEA
RDS(ON)1
RDS(ON)2
4.5V ≤ VIN ≤ 23V
ΔIC = ± 10μA
VEN = 0V, VSW = 0V
0.788 0.8 0.812 V
--
940
-- μA/V
--
130
--
mΩ
--
130
--
mΩ
--
0
10
μA
Upper Switch Current Limit
Min. Duty Cycle, VBOOT − VSW = 4.8V 3.5 4.5
--
A
Lower Switch Current Limit
From Drain to Source
--
1.2
--
A
COMP to Current Sense
Transconductance
GCS
--
5
-- A/V
Oscillation Frequency
Short Circuit Oscillation
Frequency
FOSC1
FOSC2
VFB = 0V
1
1.2 1.4 μHz
--
300
-- kHz
Maximum Duty Cycle
DMA X
VFB = 0.7V
--
75
--
%
Minimum On Time
tON
-- 100
--
ns
To be continued
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4
DS8282B-01 March 2011
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