ncp1511 ON Semiconductor, ncp1511 Datasheet
ncp1511
Related parts for ncp1511
ncp1511 Summary of contents
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... PWM circuitry can be synchronized to an external 500 kHz to 1000 kHz clock signal. Finally, it includes an integrated soft−start, cycle−by−cycle current limiting, and thermal shutdown protection. The NCP1511 is available in a chip scale package. Features • ...
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... Sync, CB, and SHD pins. Feedback Voltage from the Output of the Power Supply. Enable for Switching Regulator. This Pin is Active High to enable the NCP1511. The SHD Pin has an internal pull down resistor to force the converter off if this pin is not connected to the external circuit. ...
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MAXIMUM RATINGS Rating Maximum Voltage All Pins Maximum Operating Voltage All Pins Thermal Resistance, Junction−to−Air (Note 1) Operating Ambient Temperature Range ESD Withstand Voltage Moisture Sensitivity Storage Temperature Range Junction Operating Temperature Stresses exceeding Maximum Ratings may damage the device. ...
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ELECTRICAL CHARACTERISTICS mode –30 to 85°C for Min/Max values, unless otherwise noted. A Characteristic VCC Pin Quiescent Current of Sync Mode out Quiescent Current of PWM Mode out Quiescent Current ...
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ELECTRICAL CHARACTERISTICS (continued) for PWM mode –30 to 85°C for Min/Max values, unless otherwise noted. A Characteristic Sync PWM Mode Characteristics (continued) Feedback Voltage Accuracy, V Set = 1.0 V CB0 = L, CB1 = L out Feedback ...
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V 70 1.5 V out 1.3 V out 100 200 300 I (mA) out Figure 4. Efficiency vs. Output Current in PWM Mode 100 90 80 5.2 V ...
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1.5 V out T = 25° PWM Mode (mA) out Figure 10. Input Current Comparison 15 10 1.0 V 1.3 V out ...
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1.5 V out T = 25°C A 1.5 PWM Mode 1.0 0 0.2 0.4 0.6 0.8 V (V) SHD Figure 16. Output Voltage vs. Shutdown Pin Voltage ...
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V 3 1.89 V out I = 300 mA out PWM 200 ms/div Figure 22. Line Transient Response for PWM 300 3 1.89 V out PWM 50 ...
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... OFF. Switching will continue when the output voltage falls below the threshold of OVP comparator. Pulsed Mode (PM) Under light load conditions (< 30 mA), the NCP1511 can be configured to enter a low current pulsed mode operation to reduce power consumption. This is accomplished by applying a logic LOW to the SYNC pin. The output regulation is implemented by pulse frequency modulation ...
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... Output Voltage Selection The output voltage is digitally programmed to one of four voltage levels depending on the logic state of CB0 and CB1. Therefore if the NCP1511’s load, such as a digital cellular phone’s baseband processor, supports dynamic power management, the device can lower or raise its core voltage under software control ...
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... The input voltage (eq. 1) 1.5 V with a typical load current of 120 mA and a maximum of 300 mA. For NCP1511, the inductor has a predetermined , and D’ − value, 6.8 mH. The inductor ESR will factor into the overall efficiency of the converter. The inductor needs ...
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... Separate the feedback path of the output voltage from the power path. Keep this path close to the NCP1511 circuit. And also route it away from noisy components. This will prevent noise from coupling into the voltage feedback trace. 4. Place the DC− ...
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Table 3. Bill of Materials Component Value C 10 mF, X5R, 6 mF, X5R, 6.3 V out L 6.8 mH *Output current calculated from **Calculated output current from V = 4.2 ...
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... DIM MIN MAX A 0.540 0.660 A1 0.210 0.270 A2 0.330 0.390 D 1.550 BSC E 1.550 BSC b 0.290 0.340 E1 e 0.500 BSC e D1 1.000 BSC E1 1.000 BSC mm ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative NCP1511/D ...