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RT9224
6
DS9224-05 March 2004
www.richtek.com
Absolute Maximum Ratings
Supply Voltage ------------------------------------------------------------------------------------------------------- +15V
Boot Voltage ---------------------------------------------------------------------------------------------------------- +15V
Input, Output or I/O Voltage --------------------------------------------------------------------------------------- GND -0.3V to Vcc + 0.3V
Storage Temperature Range ---------------------------------------------------------------------------------------
−65°C to 150°C
Package Thermal Resistance
SOP-20,
θJA ---------------------------------------------------------------------------------------------------------------------------------------------------------- 87°C/W
Electrical Characteristics
Recommended Operating Conditions
Supply Voltage, VCC ------------------------------------------------------------------------------------------------------------------------------------------ +12V
±±±±±10%
Ambient Temperature Range -------------------------------------------------------------------------------------- 0°C to 70°C
Junction Temperature Range -------------------------------------------------------------------------------------- 0°C to 125°C
(TA = 25°C, recommended operating conditions, unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
VCC Supply Current
Nominal Supply
ICC
UGATE and LGATE Open
--
3
--
mA
Power-On Reset
VCC Rising Threshold
VOCSET = 4.5V
--
9.5
--
V
VCC Falling Threshold
VOCSET = 4.5V
--
7.5
--
V
Rising VOCSET Threshold
--
1.6
--
V
Oscillator
Free Running Frequency
170
200
230
kHz
Ramp Amplitude
∆VOSC
--
1.9
--
VP-P
Reference and DAC
DAC (VID0 – VID4) Input Low Voltage
--
--
0.8
V
DAC (VID0 – VID4) Input High Voltage
2.0
--
--
V
DACOUT Voltage Accuracy
-1.0
--
+1.0
%
Error Amplifier
DC Gain
--
65
--
dB
Gate Drivers
UGATE Source
RUGATE VBOOT - VPHASE = 12V
--
8
--
Ω
UGATE Sink
RUGATE VUGATE - VPHASE = 1V
--
5
--
Ω
LGATE Source
ILGATE
VCC = 12V, VLGATE = 6V
--
500
--
mA
LGATE Sink
RLGATE VLGATE = 1V
--
5
--
Ω
To be continued
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