RT8296A
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 Pins Voltage ----------------------------------------------------------------------------------------------- - 0.3V to 6V
l BOOT - SW -------------------------------------------------------------------------------------------------------- - 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), qJA ---------------------------------------------------------------------------------------- 75°C/W
SOP-8 (Exposed Pad), qJC --------------------------------------------------------------------------------------- 15°C/W
l Lead Temperature (Soldering, 10 sec.)----------------------------------------------------------------------- 260°C
l JunctionTemperature -------------------------------------------------------------------------------------------- 150°C
l StorageTemperature 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 AmbientTemperature Range ----------------------------------------------------------------------------------- - 40°C to 85°C
Electrical Characteristics
(VIN = 12V, TA = 25°C, unless otherwise specified)
Parameter
Shutdown Supply Current
Supply Current
Symbol
Test Conditions
VEN = 0V
Min
--
Typ
0.5
0.8
Max
3
Unit
mA
VEN = 3 V, VFB = 0.9V
--
1.2
mA
Feedback Reference
Voltage
VFB
4.5V £ VIN £ 23V
0.788
0.8
940
85
0.812
--
V
Error Amplifier
Transconductance
High Side Switch
On Resistance
Low Side Switch
On Resistance
High Side Switch Leakage
Current
GEA
DIC = ±10mA
--
--
--
--
--
mA/V
mW
mW
mA
RDS(ON)1
RDS(ON)2
--
85
--
VEN = 0V, VSW = 0V
0
10
--
Min. Duty Cycle,
VBOOT - VSW = 4.8V
Upper Switch Current Limit
5.1
A
COMP to Current Sense
Transconductance
GCS
--
300
--
5.4
340
100
--
380
--
A/V
kHz
kHz
Oscillation Frequency
fOSC1
fOSC2
Short Circuit Oscillation
Frequency
VFB = 0V
Maximum Duty Cycle
Minimum On Time
DMAX
tON
VFB = 0.7V
--
--
93
--
--
%
100
ns
To be continued
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4
DS8296A-03 March 2011
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
