RT9224 Datasheet, PDF (6/8 Pages) List of Unclassifed Manufacturers – 5-Bit Programmable Synchronous PWM Buck Converter Controller and Output Voltage Monitor

RT9224
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,θ_JA ---------------------------------------------------------------------------------------------------------------------------------------------------------- 87° C/W
Recommended Operating Conditions
Supply Voltage, V_CC ------------------------------------------------------------------------------------------------------------------------------------------ +12V ±10%
Ambient Temperature Range -------------------------------------------------------------------------------------- 0° C to 70°C
Junction Temperature Range -------------------------------------------------------------------------------------- 0° C to 125°C
Electrical Characteristics
(TA = 25° C, recommended operating conditions, unless otherwise specified)
Parameter
Symbol
Test Conditions
Min Typ Max Units
VCC Supply Current
Nominal Supply
Power-On Reset
I_CC
UGATE and LGATE Open --
3
--
mA
VCC Rising Threshold
VCC Falling Threshold
Rising V_OCSET Threshold
Oscillator
V_OCSET = 4.5V
V_OCSET = 4.5V
--
9.5
--
V
--
7.5
--
V
--
1.6
--
V
Free Running Frequency
170 200 230 kHz
Ramp Amplitude
Reference and DAC
∆V_OSC
--
1.9
--
V_P-P
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
UGATE Sink
LGATE Source
LGATE Sink
R_UGATE V_BOOT - V_PHASE = 12V
R_UGATE V_UGATE - V_PHASE = 1V
I_LGATE VCC = 12V, V_LGATE = 6V
R_LGATE V_LGATE = 1V
--
8
--
Ω
--
5
--
Ω
--
500
--
mA
--
5
--
Ω
To be continued
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6
DS9224-05 March 2004