RT9185 RICHTEK [Richtek Technology Corporation], RT9185 Datasheet
RT9185
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RT9185 Summary of contents
Page 1
... DVD-ROM, CD/RW, XDSL Router or IA equipments applications. The regulator outputs are capable of sourcing 1.5A, 0.8A and 0.3A of output current respectively. The RT9185 also works with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications. The other features include faster transient response, low dropout voltage, high output accuracy, current limiting and thermal shutdown protections ...
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... Functional Pin Description Pin Name Pin Function VOUT1 Channel 1 Output Voltage VDD Supply Input GND Common Ground VOUT2 Channel 2 Output Voltage VOUT3 Channel 3 Output Voltage www.richtek.com 2 VOUT1 VOUT3 C2 4.7uF RT9185 VDD VOUT2 GND C1 2.2uF Thermal Sensor - + Amplifier Reference Current Limiting + - - - + ...
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... LOAD3 OUT3 OUT3 − − Min Typ 3.315 3.35 2.525 2.55 1.782 1.8 1.485 1.5 1.5 1.9 0.8 1.3 0.3 0.5 -- 0.4 -- 600 -- 700 -- 2 <1. <0. < 0. 125 165 RT9185 65°C to 150°C 40°C to 125°C Max Units 3.415 2.60 V 1.836 1.530 -- -- A -- 0.8 mA 1085 PPM °C -- www.richtek.com 3 ...
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... RT9185 Note 1. Stresses listed as the above “Absolute Maximum Ratings” may cause permanent damage to the device. These are for stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may remain possibility to affect device reliability ...
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... OUT2 V = 1.8V/1.5V OUT3 105 125 (°C) V OUT1 V OUT2 V OUT3 105 125 (° 3.35V OUT1 105 125 RT9185 Quiescient Current 600 500 400 300 200 -40 -35 - Temperature (°C) PSRR - 2.2uF 4.7uF 4.7uF, C ...
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... RT9185 Load Transient Response 3.35V DD OUT1 100 C = 2.2uF 4.7uF -50 ≈ Time (500μs/Div) Load Transient Response 1.5V DD OUT3 100 C = 2.2uF 1uF -50 ≈ 400 200 0 Time (500μs/Div) Line Transient Response V = 4. ...
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... DS9185-11 March 2007 T = 125° 25°C A SOP 25° 50° TO-263-5 5.5 6.5 7.5 8.5 Power Dissipation vs. Copper Area 500 400 300 200 100 T = 65° 50° 25° 2.5 3 3.5 Power Dissipation (W) RT9185 T = 125°C J TO-252 4 4.5 5 www.richtek.com 7 ...
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... Output Capacitor The RT9185 is designed specifically to work with very small ceramic output capacitors. The recommended minimum capacitance (temperature characteristics X7R, X5R, Z5U, or Y5V) are 2.2μF to 4.7μF range with 10mΩ to 50mΩ ...
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... Thermal Considerations The RT9185 is a triple channel CMOS regulator designed to provide two output voltage from one package. Each output pin the RT9185 can deliver a current 1.5A, 0.8A and 0.3A respectively over the full operating junction temperature range. However, the maximum output current must be derated at higher ambient temperature to ensure the junction temperature does not exceed 125° ...
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... TRACE RESISTANCE RT9185 VOUT1 VDD VOUT3 VOUT2 DROP = I GND GND PLANE The GND pin of the RT9185 performs the dual function of providing an electrical connection to ground and channeling heat away. Connect the GND pin to ground using a large pad or ground plane. www.richtek.com ...
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... GND + V OUT1 + GND V DD SOP-8 Board Layout GND + V OUT1 + GND V DD TO-252-5/TO-263-5 Board Layout DS9185-11 March 2007 + V OUT3 + GND V OUT2 + V OUT3 + GND V OUT2 RT9185 www.richtek.com 11 ...
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... RT9185 Outline Dimension Symbol www.richtek.com Dimensions In Millimeters Min Max 4.801 5.004 3.810 3.988 1.346 1.753 0.330 0.508 1.194 1.346 0.170 0.254 0.050 0.254 5.791 6.200 0.400 1.270 8-Lead SOP Plastic Package H M Dimensions In Inches ...
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... Ref. 0.889 2.032 1.270 Ref. 5.200 Ref. 0.200 1.500 2.500 3.400 0.500 0.850 5-Lead TO-252 Surface Mount Package RT9185 Dimensions In Inches Min Max 0.086 0.094 0.015 0.035 0.195 0.215 0.018 0.035 0.210 0.245 ...
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... RT9185 Symbol Richtek Technology Corporation Headquarter 5F, No. 20, Taiyuen Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5526789 Fax: (8863)5526611 www.richtek.com Dimensions In Millimeters Min Max 4.064 4.826 1.143 1.676 0.660 0.914 0.305 0.584 1 ...