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CS8363YDPSR7 数据表(PDF) 5 Page - ON Semiconductor |
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CS8363YDPSR7 数据表(HTML) 5 Page - ON Semiconductor |
5 / 8 page CS8363 http://onsemi.com 5 C1* 0.1 mF GND CS8363 MCU B+ VIN VTRK Adj ENABLE RESET VSTBY R3 VDD C2** 10 mF ESR < 8.0 W 3.3 V, 100 mA RESET I/O C3** 10 mF ESR < 8.0 W SW 3.3 V, 250 mA GND *C1 is required if regulator is located far from power supply filter. **C2 and C3 are required for stability. Figure 3. Test and Application Circuit, Dual 3.3 V Regulator APPLICATION NOTES External Capacitors Output capacitors for the CS8363 are required for stability. Without them, the regulator outputs will oscillate. Actual size and type may vary depending upon the application load and temperature range. Capacitor effective series resistance (ESR) is also a factor in the IC stability. Worst−case is determined at the minimum ambient temperature and maximum load expected. Output capacitors can be increased in size to any desired value above the minimum. One possible purpose of this would be to maintain the output voltages during brief conditions of negative input transients that might be characteristic of a particular system. Capacitors must also be rated at all ambient temperatures expected in the system. To maintain regulator stability down to −40 °C, capacitors rated at that temperature must be used. More information on capacitor selection for SMART REGULATOR ®s is available in the SMART REGULATOR application note, “Compensation for Linear Regulators,” document number SR003AN/D, available through the Literature Distribution Center or via our website at http://www.onsemi.com. Calculating Power Dissipation in a Dual Output Linear Regulator The maximum power dissipation for a dual output regulator (Figure 4) is PD(max) + VIN(max) * VOUT1(min) IOUT1(max) ) VIN(max) * VOUT2(min) IOUT2(max) ) VIN(max)IQ (1) where: VIN(max) is the maximum input voltage, VOUT1(min) is the minimum output voltage from VOUT1, VOUT2(min) is the minimum output voltage from VOUT2, IOUT1(max) is the maximum output current, for the application, IOUT2(max) is the maximum output current, for the application, and IQ is the quiescent current the regulator consumes at both IOUT1(max) and IOUT2(max). Once the value of PD(max) is known, the maximum permissible value of RqJA can be calculated: R QJA + 150 °C * TA PD (2) The value of RqJA can be compared with those in the package section of the data sheet. Those packages with RqJA’s less than the calculated value in equation 2 will keep the die temperature below 150 °C. In some cases, none of the packages will be sufficient to dissipate the heat generated by the IC, and an external heatsink will be required. Figure 4. Dual Output Regulator With Key Performance Parameters Labeled. SMART REGULATOR Control Features VOUT1 IOUT1 VOUT2 IOUT2 VIN IIN IQ |
类似零件编号 - CS8363YDPSR7 |
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类似说明 - CS8363YDPSR7 |
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