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RT9245BPC Datasheet(PDF) 7 Page - Richtek Technology Corporation |
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RT9245BPC Datasheet(HTML) 7 Page - Richtek Technology Corporation |
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7 / 23 page  RT9245B 7 DS9245B-02 March 2007 www.richtek.com 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 0.94 1.0 1.06 V VDVD Threshold Hysteresis VDVDHYS -- 50 -- mV Oscillator Free Running Frequency fOSC RRT = 20kΩ 170 200 230 kHz Frequency Adjustable Range fOSC_ADJ 50 -- 400 kHz Ramp Amplitude ∆VOSC RRT = 20kΩ -- 1.9 -- V Ramp Valley VRV 0.7 1.0 -- V Maximum Duty of Each Channel 58 64 70 % RT Pin Voltage VRT RRT = 20kΩ 0.9 1.0 1.1 V Reference and DAC VDAC ≥ 1V −1 -- +1 % DACOUT Voltage Accuracy ∆VDAC VDAC < 1V −10 -- +10 mV DAC (VID0-VID5) Input Low VILDAC -- -- 0.8 V DAC (VID0-VID5) Input High VIHDAC 1.2 -- -- V To be continued Recommended Operating Conditions (Note 3) l Supply Voltage, VCC ----------------------------------------------------------------------------------------- 5V ± 10% l Junction Temperature Range ------------------------------------------------------------------------------- −40°C to 125°C l Ambient Temperature Range ------------------------------------------------------------------------------- −40°C to 85°C Absolute Maximum Ratings (Note 1) l Supply Voltage, VCC ------------------------------------------------------------------------------------------ 7V l Input, Output or I/O Voltage -------------------------------------------------------------------------------- GND − 0.3V to VCC + 0.3V l Power Dissipation, PD @ TA = 25 °C TSSOP-28 ------------------------------------------------------------------------------------------------------ 1W l Package Thermal Resistance (Note 4) TSSOP-28, θJA ------------------------------------------------------------------------------------------------ 100°C/W l Junction Temperature ---------------------------------------------------------------------------------------- 150 °C l Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------- 260 °C l Storage Temperature Range -------------------------------------------------------------------------------- −65°C to 150°C l ESD Susceptibility (Note 2) HBM (Human Body Mode) ---------------------------------------------------------------------------------- 2kV MM (Machine Mode) ----------------------------------------------------------------------------------------- 200V |
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