RT8283B データシートの表示（PDF） - Richtek Technology
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RT8283B Datasheet PDF : 14 Pages
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RT8283B
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
All 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 -------------------------------------------------------------------------------------- −65°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
Symbol
Test Conditions
Min Typ Max Unit
Shutdown Supply Current
VEN = 0V
--
0.5
3
μA
Supply Current
VEN = 3V, VFB = 0.9V
--
0.8 1.2 mA
Feedback Voltage
Error Amplifier
Transconductance
VFB
GEA
4.5V ≤ VIN ≤ 23V
ΔIC = ±10μA
0.788 0.8 0.812 V
-- 940 -- μA/V
High Side Switch
On-Resistance
RDS(ON)1
--
85
-- mΩ
Low Side Switch
On-Resistance
RDS(ON)2
--
85
-- mΩ
High Side Switch Leakage
Current
VEN = 0V, VSW = 0V
--
0
10
μA
High Side Switch Current Limit
Min. Duty Cycle, VBOOT − VSW = 4.8V 4.5 5.8
--
A
Low Side Switch Current Limit
COMP to Current Sense
Transconductance
Oscillation Frequency
Short Circuit Oscillation
Frequency
GCS
FOSC1
FOSC2
From Drain to Source
VFB = 0V
--
1.5
--
A
--
5.6
--
A/V
1
1.2 1.4 MHz
-- 300 -- kHz
Maximum Duty Cycle
Minimum On-Time
DMA X
tON
VFB = 0.7V
--
75
--
%
-- 100 --
ns
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4
To be continued
DS8283B-01 March 2011
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