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RT9245PC Datasheet(PDF) 7 Page - Richtek Technology Corporation |
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RT9245PC Datasheet(HTML) 7 Page - Richtek Technology Corporation |
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7 / 22 page  RT9245 7 DS9245-06 March 2007 www.richtek.com Absolute Maximum Ratings (Note 1) Supply Voltage, VCC ------------------------------------------------------------------------------------------- 7V Input, Output or I/O Voltage ---------------------------------------------------------------------------------- GND − 0.3V to VCC+ 0.3V Package Thermal Resistance TSSOP-28, θJA -------------------------------------------------------------------------------------------------- 100°C/W Junction Temperature ------------------------------------------------------------------------------------------ 150°C Lead Temperature (Soldering, 10 sec.) -------------------------------------------------------------------- 260°C Storage Temperature Range --------------------------------------------------------------------------------- −65°C to 150°C ESD Susceptibility (Note 2) HBM (Human Body Mode) ----------------------------------------------------------------------------------- 2kV MM (Machine Mode) ------------------------------------------------------------------------------------------- 200V Electrical Characteristics (VCC = 5V, TA = 25 °C, unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Units VCC Supply Current Nominal Supply Current ICC PWM 1,2,3,4 Open -- 12 16 mA Power-On Reset POR Threshold VCCRTH VCC Rising 4.0 4.2 4.5 V Hysteresis VCCHYS 0.2 0.5 -- V Trip (Low to High) VDVDTP Enable 1.1 1.2 1.3 V VDVD Threshold Hysteresis VDVDHYS -- 50 -- mV Oscillator Free Running Frequency fOSC RRT = 32kΩ 170 200 230 kHz Frequency Adjustable Range fOSC_ADJ 50 -- 400 kHz Ramp Amplitude ΔVOSC RRT = 32kΩ -- 1.9 -- V Ramp Valley VRV 0.7 1.0 -- V Maximum On-Time of Each Channel 62 66 75 % RT Pin Voltage VRT RRT = 32kΩ 1.4 1.60 1.8 V Reference and DAC VDAC ≥ 1V −1 -- +1 % DACOUT Voltage Accuracy ΔVDAC VDAC < 1V −10 -- +10 mV DAC (VID0-VID125) Input Low VILDAC -- -- 0.4 V DAC (VID0-VID125) Input High VIHDAC 0.8 -- -- V DAC (VID0-VID125) Bias Current IBIAS_DAC 25 50 75 μA VOSS Pin Voltage VVOSS RVOSS = 100kΩ 1.5 1.65 1.8 V To be continued Recommended Operating Conditions (Note 3) Supply Voltage, VCC ------------------------------------------------------------------------------------------- 5V ± 10% Ambient Temperature Range --------------------------------------------------------------------------------- 0 °C to 70°C Junction Temperature Range --------------------------------------------------------------------------------- 0 °C to 125°C |
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