This is a switching regulator circuit that is work using regulator IC LM2651. This circuit provides high efficiency power conversion over a 100:1 load range (1.5A to 15mA). This is the figure of the circuit.
Synchronous rectification and 75 mΩ internal switches provide up to 97% efficiency. At light loads, the LM2651 enters a low power hysteretic or sleep mode to keep the efficiency high. In many applications, the efficiency still exceeds 80% at 15 mA load. A shutdown pin is available to disable the LM2651 and reduce the supply current to 7 μA. The IC contains patented current sensing circuitry for current mode control. This feature eliminates the external current sensing required by other current mode DC to DC converters. The IC has a 300 KHz fixed frequency internal oscillator. The high oscillator frequency allows the use of extremely small, low profile components.
Synchronous rectification and 75 mΩ internal switches provide up to 97% efficiency. At light loads, the LM2651 enters a low power hysteretic or sleep mode to keep the efficiency high. In many applications, the efficiency still exceeds 80% at 15 mA load. A shutdown pin is available to disable the LM2651 and reduce the supply current to 7 μA. The IC contains patented current sensing circuitry for current mode control. This feature eliminates the external current sensing required by other current mode DC to DC converters. The IC has a 300 KHz fixed frequency internal oscillator. The high oscillator frequency allows the use of extremely small, low profile components.
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