NCP1521AMUTBG ONSEMI [ON Semiconductor], NCP1521AMUTBG Datasheet
NCP1521AMUTBG
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NCP1521AMUTBG Summary of contents
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... Figure 1. Typical Application − TSOP−5 © Semiconductor Components Industries, LLC, 2006 July, 2006 − Rev NCP1521ASNT1G NCP1521AMUTBG †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specification Brochure, BRD8011/D. ...
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Figure 3. Efficiency vs. Output Current Vbattery VIN PWM/PFM 1 CONTROL 4.7 mF GND 2 LOGIC CONTROL Enable EN & THERMAL 3 SHUTDOWN Figure 4. Simplified Block Diagram NCP1521 V = 3.3 V ...
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PIN FUNCTION DESCRIPTION Pin No. Pin No. TSOP5 UDFN6 Symbol 1 3 VIN GND VIN GND (Top View) Figure 5. Pin Connections ...
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ELECTRICAL CHARACTERISTICS +85°C ambient temperature, unless otherwise noted, operating conditions V Characteristic Input Voltage Range Undervoltage Lockout (V Falling) IN Quiescent Current PFM No Load Standby Current, EN Low Oscillator Frequency Peak Inductor Current Feedback Reference Voltage FB Pin Tolerance ...
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V , INPUT VOLTAGE (V) IN Figure 7. Quiescent Current vs. Supply Voltage 1 OUT 0.8 ...
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EN 2 V/Div V OUT 500 mV/Div 100 ms/Div Figure 13. Soft Start Time (V 1.8 1.7 1.6 1.5 1.4 1 300 mA OUT 1.2 −40 − TEMPERATURE (°C) Figure 15. Frequency vs. Temperature 2.0 ...
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I = 100 mA OUT 1.0 0 300 mA OUT 0.0 −0 600 mA OUT −1.0 −1 3 −2.0 − TEMPERATURE (°C) Figure 19. Output Voltage Accuracy (V ...
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Overview The NCP1521 uses a constant frequency, current mode step−down architecture. Both the main (P−Channel MOSFET) and synchronous (N−Channel MOSFET) switches are internal. It delivers a constant voltage from either a single Li−Ion or three cell NiMH/NiCd battery to portable ...
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Cycle−by−Cycle Current Limitation From the block diagram (Figure 4 used to realize cycle−by−cycle current limit protection. The comparator compares the LX pin voltage with the reference voltage, which is biased by a constant current. If the inductor ...
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Output Voltage Selection The output voltage is programmed through an external resistor divider connected from V OUT For low power consumption and noise immunity, the resistor from FB to GND (R2) should be in the [100 k−600 k] range. If ...
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Table 3. List of Inductor FDK MIPW3226 Series TDK VLF3010AT Series Taiyo Yuden LQ CBL2012 Coil craft DO1605−T Series Output Capacitor Selection Selecting the proper output capacitor is based on the desired output ripple voltage. Ceramic capacitors with low ESR ...
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PCB Layout Recommendations Good PCB layout plays an important role in switching mode power conversion. Careful PCB layout can help to minimize ground bounce, EMI noise and unwanted feedback that can affect the performance of the converter. Hints suggested below ...
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U1 J1 VFVIN VIN GND 4.7 mF Power NCP152x 0 NCP1521 2 CON3 EN ...
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NCP1521 Figure 31. Board Layout (Top View) Figure 32. Board Layout (Bottom View) http://onsemi.com 14 ...
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Bill of Materials Item Part Description 1 NCP1521 DC−DC Converter 4.7 mF Ceramic Capacitor 2 6.3 V X5R 10 mF Ceramic Capacitor 3 6.3 V X5R 4 SMD Resistor 220 K 5 SMD Inductor 6 I/O Connector can be plugged ...
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PACKAGE DIMENSIONS 0.05 (0.002) H SOLDERING FOOTPRINT* 0.95 0.037 1.0 0.039 *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and ...
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D Í Í Í PIN ONE Í Í Í REFERENCE Í Í Í 0. BOTTOM VIEW ON Semiconductor and are registered trademarks of ...