RT8295B データシートの表示（PDF） - Richtek Technology
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RT8295B Datasheet PDF : 14 Pages
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RT8295B
Absolute Maximum Ratings (Note 1)
l Supply Voltage, VIN ----------------------------------------------------------------------------------------------- −0.3V to 25V
l Input Voltage, SW ------------------------------------------------------------------------------------------------- −0.3V to (VIN + 0.3V)
l VBOOT − VSW -------------------------------------------------------------------------------------------------------- −0.3V to 6V
l Other Pin Voltages ------------------------------------------------------------------------------------------------ −0.3V to 6V
l Power Dissipation, PD @ TA = 25°C
SOP-8 (Exposed Pad) -------------------------------------------------------------------------------------------- 1.333W
l Package Thermal Resistance (Note 2)
SOP-8 (Exposed Pad), θJA --------------------------------------------------------------------------------------- 75°C/W
SOP-8 (Εxposed Pad), θJC -------------------------------------------------------------------------------------- 15°C/W
l Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------ 260°C
l Junction Temperature --------------------------------------------------------------------------------------------- 150°C
l Storage Temperature Range ------------------------------------------------------------------------------------- −65°C to 150°C
l ESD Susceptibility (Note 3)
HBM (Human Body Mode) --------------------------------------------------------------------------------------- 2kV
MM (Machine Mode) ---------------------------------------------------------------------------------------------- 200V
Recommended Operating Conditions (Note 4)
l Supply Voltage, VIN ----------------------------------------------------------------------------------------------- 4.5V to 23V
l Junction Temperature Range ------------------------------------------------------------------------------------ −40°C to 125°C
l Ambient Temperature Range ------------------------------------------------------------------------------------ −40°C to 85°C
Electrical Characteristics
(VIN = 12V, TA = 25°C, unless otherwise specified)
Parameter
Symbol
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
∆IC = ± 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
COMP to Current Sense
Transconductance
GCS
Min. Duty Cycle, VBOOT− VSW = 4.8V --
4.3
--
A
--
4
-- A/V
Oscillation Frequency
Short Circuit Oscillation
Frequency
fOSC1
fOSC2
VFB = 0V
1
1.2 1.4 MHz
-- 270 -- kHz
Maximum Duty Cycle
DMAX
VFB = 0.7V
--
75
--
%
Minimum On Time
tON
-- 100 --
ns
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4
To be continued
DS8295B-03 March 2011
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