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CS5159GD16 データシート(PDF) 9 Page - ON Semiconductor |
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CS5159GD16 データシート(HTML) 9 Page - ON Semiconductor |
9 / 16 page CS5159 http://onsemi.com 9 Figure 8. Peak−to−Peak Ripple on VOUT = 2.8 V, IOUT = 13 A (Heavy Load) M 1.00 μs Trace 1− Regulator Output Voltage (10 mV/div.) Trace 2− Inductor Switching Node (5.0 V/div.) Transient Response The CS5159 V2 control loop’s 100 ns reaction time provides unprecedented transient response to changes in input voltage or output current. Pulse by pulse adjustment of duty cycle is provided to quickly ramp the inductor current to the required level. Since the inductor current cannot be changed instantaneously, regulation is maintained by the output capacitor(s) during the time required to slew the inductor current. For best transient response, a combination of a number of high frequency and bulk output capacitors are usually used. If the maximum on time is exceeded while responding to a sudden increase in load current, a normal off time occurs to prevent saturation of the output inductor. Figure 9. CS5159 Demonstration Board Response to a 0.5 to 13 A Load Pulse (Output Set for 2.8 V) Trace 2− Regulator Output Voltage (20 V/div.) Trace 1− Regulator Output Voltage (1.0 V/div.) Figure 10. CS5159 Demonstration Board Response to 13 A Load Turn On (Output Set for 2.8 V). Upon Completing a Normal Off Time, The V2 Control Loop Immediately Connects the Inductor to the Input Voltage, Providing 100% Duty Cycle. Regulation is Achieved in Less Than 20 ms Trace 1− Regulator Output Voltage (100 mV/div.) Trace 2− Inductor Switching Node (5.0 V/div.) Trace 3− Output Current (0.5 to 13 Amps) (10 A/div.) Figure 11. CS5159 Demonstration Board Response to 13 A Load Turn Off (Output Set for 2.8 V). V2 Control Topology Immediately Connects Inductor to Ground, Providing 0% Duty Cycle. Regulation is Achieved in Less Than 10 ms Trace 3− Output Current (13 to 0,5 Amps) (10 A/div.) Trace 2− Inductor Switching Node (5.0 V/div.) Trace 1− Regulator Output Voltage (100 mV/div.) PROTECTION AND MONITORING FEATURES VCC1 Monitor To maintain predictable startup and shutdown characteristics an internal VCC1 monitor circuit is used to prevent the part from operating below 3.75 V minimum startup. The VCC1 monitor comparator provides hysteresis and guarantees a 3.70 V minimum shutdown threshold. |
同様の部品番号 - CS5159GD16 |
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同様の説明 - CS5159GD16 |
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