ncp1523b ON Semiconductor, ncp1523b Datasheet
ncp1523b
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ncp1523b Summary of contents
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... NCP1523 is available in automatic switching PWM/PFM (NCP1523FCT2G) improving system efficiency and in PWM mode only (NCP1523BFCT2G) offering a very efficient load transient solution. Additional features include integrated soft−start, cycle−by−cycle current limiting and thermal shutdown protection. The NCP1523 is available in a space saving, 8 pin chip scale package ...
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OFF BATTERY 4.7 mF GND C1 GND A1 Logic Control & EN Enable Thermal Shutdown B2 Figure 2. Simplified Block Diagram NCP1523 OUT ...
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PIN FUNCTION DESCRIPTION Pin Pin Name Type A1 GND Power Ground A2 V Power Input Analog Output Digital Input C1 GND Power Ground C2 ADJ Analog Input D1 V Analog Input OUT D2 FB ...
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ELECTRICAL CHARACTERISTICS FOR NCP1523 (Typical values are referenced +25°C, Minimum and Maximum values are referenced −40°C to +85°C ambient temperature, A unless otherwise noted, operating conditions V Symbol V Input Voltage Range IN V Under Voltage Lockout ...
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... ELECTRICAL CHARACTERISTICS FOR NCP1523B (Typical values are referenced +25°C, Minimum and Maximum values are referenced −40°C to +85°C ambient temperature, A unless otherwise noted, operating conditions V Symbol V Input Voltage Range IN V Under voltage Lockout (V UVLO I Quiescent Current − No Switching q Quiescent Current − ...
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... NCP1523FCT2G vs. Load Current vs. Input Voltage vs. Temperature vs. Input Voltage 9, 10 vs. Load Current 11 vs. Temperature vs. Output Current vs. Temperature 15, 16 vs. Input Voltage 5 vs. Temperature 3 vs. Temperature vs. Input Voltage 12 17 http://onsemi.com 6 NCP1523BFCT2G 20 ...
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V , INPUT VOLTAGE (V) IN Figure 3. Quiescent Current vs. Supply Voltage 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 ...
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I = 400 mA OUT 3 600 mA OUT 3.0 2.8 2.6 2.4 2.8 3.3 3.8 4 INPUT VOLTAGE (V) IN Figure 9. Frequency vs. Input Voltage 5.0 3 0.9 V OUT ...
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NCP1523 CHARACTERISTICS Figure 15. Load Transient Response in PFM Operation ( 100 mA) Figure 17. Soft Start Time (V NCP1523 Figure 16. Load Transient Response Between PFM and PWM Operation (100 mA to 200 mA) = 3.6 V) ...
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... OUT Figure 20. Efficiency vs. Output Current (V = 1.2 V, 255C) OUT 100 100 200 300 I , OUTPUT CURRENT (mA) OUT Figure 22. Efficiency vs. Output Current (V = 3.6 V, 255C) IN NCP1523 NCP1523B CHARACTERISTICS 3.6 3.5 3.4 3.3 3.2 3.1 3.0 2.9 2.8 2.7 2.6 2.5 2.4 2.8 Figure 19. Switching Frequency vs. Input = 300 mA, 255C) Voltage ( 400 500 600 0 Figure 21 ...
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... Figure 26. Line Regulation vs. Output Current (V = 1.2 V, 255C) OUT 0.50 0.45 0.40 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0 −40 − TEMPERATURE (°C) Figure 28. Shutdown Current vs. Temperature (V = 3.6 V) OUT NCP1523 NCP1523B CHARACTERISTICS 3 2.7 V − 5.5 V −2 in −3 −4 0 500 600 Figure 25. Load Regulation vs. Temperature −40°C 0 85° ...
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... OUT OUT 20 mV/Div V OUT mA/Div I OUT Figure 32. Load Transient Response ( step) IN OUT NCP1523 NCP1523B CHARACTERISTICS 20 mV/Div V OUT 500 mV/Div V IN Figure 31. Line Transient Response = 600 mA mV/Div V OUT I 200 mA/Div OUT Figure 33. Load Transient Response ( ...
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... NCP1523 OPERATION DESCRIPTION PWM Operating Mode at Light Load: NCP1523B Only At low light conditions, NCP1523BFCT2G works also in PWM mode offering very good load transient results from light load to full charge. When there is no load on the output, the PMOS Q1 remains ON during a small pulse according to the flip− ...
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Output Voltage Selection The output voltage is programmed through an external resistor divider connected from ADJ to FB then to GND. For low power consumption and noise immunity, the resistor from FB to GND (R2) should be in the [100 ...
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Output Capacitor Selection Selecting the proper output capacitor is based on the desired output ripple voltage. Ceramic capacitors with low ESR values will have the lowest output ripple voltage and are strongly recommended. The output capacitor requires either an X7R ...
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... Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada Fax: 303− ...