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TS3300 датащи(PDF) 8 Page - Silicon Laboratories |
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TS3300 датащи(HTML) 8 Page - Silicon Laboratories |
8 / 12 page TS3300 Page 8 TS3300 Rev. 1.0 THEORY OF OPERATION The TS3300 is a power management product that combines a high-efficiency boost regulator and an output load switch into one package. The boost regulator can operate from supply voltages as low as 0.6V and can deliver at least 75mA at 1.2VBI and 3VBO. Under no-load conditions, the boost regulator exhibits a No-Load Input Supply Current of 10.8µA that is actually drawn from the input source while the output is within regulation. At start-up, an internal low voltage oscillator in the start-up control circuitry drives the gate of the internal FET to charge the load capacitor. Once the output voltage reaches approximately 1.1V, the main control circuitry starts to operate. With an adjustable peak inductor current, the TS3300 can provide up to 84% efficiency with a 1.2VBI and 3VBO. The input and output supply voltage range for the boost regulator is from 0.6V to 3V and 1.8V to 3.6V, respectively. The TS3300 can be operated in two different configurations, Boost Only Configuration or Boost + Output Load Switch Configuration. If the Output Load Switch is not needed, it is recommended to use the Boost Only Configuration, since the lowest quiescent current is achievable this way. Boost + Output Load Switch Operation For Boost + Output Load Switch operation, please refer to Figure 1 which displays the appropriate circuit configuration. The Boost’s Output, BO, must be connected to the Output Load Switch Input, REGIN. The Output Load Switch is controlled by REGEN, which is an Active Low Logic Input. The SWEN and REGFB pins must be connected to REGIN. During Boost + Output Load Switch operation, the Boost Shutdown Control should not be used. The BEN pin should be connected to analog ground. During this mode of operation, the Output Load Switch will require an added 1 µA of Input Supply Current as drawn from the input source. The anti-crushTM feature can be used during Boost + Output Load Switch operation. The output load switch should not be used as a load disconnect. Refer to Table 1 for the Output Load Switch settings. OUTPUT LOAD SWITCH FUNCTION REG FB SW EN REGIN REG EN FUNCTION REG FB, SW EN, REGIN should be connected to BO. High VREGOUT=GND (OFF State) Low VREGOUT=VBO (ON State) Table 1. Output Load Switch settings Figure 1. Boost + Output Load Switch Circuit Configuration |
Аналогичный номер детали - TS3300 |
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Аналогичное описание - TS3300 |
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