VLCF4020-6R8 ONSEMI [ON Semiconductor], VLCF4020-6R8 Datasheet
VLCF4020-6R8
Related parts for VLCF4020-6R8
VLCF4020-6R8 Summary of contents
Page 1
NCP1511 Up to 500 mA, High Efficiency Synchronous Step−Down DC−DC Converter in Chip Scale Package The NCP1511 step−down PWM DC−DC converter is optimized for portable applications powered from 1−cell Li−ion or 3−cell Alkaline/NiCd/NiMH batteries. This DC−DC converter utilizes a current−mode ...
Page 2
COMPENSATION RAMP FB GNDA CB0 SELECT LOGIC CB1 BANDGAP REFERENCE AND SOFT SHUTDOWN START ENABLE SHD DETECT PIN FUNCTION DESCRIPTION Pin No. Symbol Type A1 GNDP Power Ground A2 LX Analog Output A3 V Analog Input CC B1 SYNC Analog ...
Page 3
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 Maximum ratings are those values beyond which device ...
Page 4
ELECTRICAL CHARACTERISTICS mode – for Min/Max values, unless otherwise noted. A Characteristic VCC Pin Quiescent Current of Sync Mode out Quiescent Current of PWM Mode out Quiescent ...
Page 5
ELECTRICAL CHARACTERISTICS (continued) for PWM mode – 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 ...
Page 6
V 70 out 1.5 V 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 ...
Page 7
1.5 V out PWM Mode (mA) out Figure 10. Input Current Comparison 15 10 1.0 V 1.3 V ...
Page 8
1.5 V out 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 V LX ...
Page 9
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 ...
Page 10
Overview The NCP1511 is a monolithic micro−power high frequency PWM step−down DC−DC converter specifically optimized for applications requiring high efficiency and a small PCB footprint such as portable battery powered products. It integrates synchronous rectification to improve efficiency as well ...
Page 11
Table 1. Operating Mode Selection SYNC Pin State Operating Mode LOW Pulsed Mode (PM) HIGH PWM, 1 MHz Switch Frequency CLOCK PWM, Frequency Synchronization Output Voltage Selection The output voltage is digitally programmed to one of four voltage levels depending ...
Page 12
Component Selection Input Capacitor Selection In PWM operating mode, the input current is pulsating with large switching noise. Using an input bypass capacitor reduces the peak current transients drawn from the input supply source, thereby reducing significantly. The capacitance needed ...
Page 13
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 ...
Page 14
... NCP1511 Figure 29. Bottom Layer Manufacturer Part Number TDK C2012X5R0J106 Murata GRM21BR60J106 TDK C2012X5R0J226 Murata GRM21BR60J226 TDK VLCF4020−6R8 Coilcraft 0805PS−682 Coilcraft LPO4812 Sumida CLS4D11 , 1.5 V and Freq = 700 kHz (1.0 MHz − 20 %). max out and Freq = 700 kHz exceeds 640 mA (I max http://onsemi ...
Page 15
PACKAGE DIMENSIONS −A− 0.10 C −B− E TOP VIEW A 0.10 C 0.05 C −C− A2 SEATING A1 PLANE SIDE VIEW SOLDERING FOOTPRINT* 0.265 0.01 *For additional information on our Pb−Free strategy and soldering details, please download ...
Page 16
ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for ...