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The NCP1521B step-down DC-DC converter is a monolithic integrated circuit optimized for portable applications powered from one cell Li-Ion or three cell Alkaline/NiCd/NiMH batteries. The part, available in adjustable output voltage versions ranging from 0.9 V to 3.9 V, is able to deliver up to 600 mA. It uses synchronous rectification to increase efficiency and reduce external part count. The device also has a built-in 1.5 MHz (nominal) oscillator which reduces component size by allowing smaller inductors and capacitors. Automatic switching PWM/PFM mode offers improved system efficiency. Additional features include integrated soft-start, cycle-by-cycle current limiting and thermal shutdown protection. The NCP1521B is available in a space saving, low profile TSOP-5 and UDFN-6 packages.

Converter Type	Step Down
Current, Output	600 mA
Dimensions	3 x 1.5 x 1 mm
Efficiency	96 %
Frequency, Switching	1.8 MHz
Height	0.039" (1mm)
Length	0.118" (3mm)
Line Regulation	0.05 %
Load Regulation	0.0005 %/mA
Mounting Type	Surface Mount
Number of Outputs	1
Number of Pins	5
Output Type	Adjustable
Package Type	TSOP
Switching Regulator	Yes
Temperature, Operating, Maximum	+85 °C
Temperature, Operating, Minimum	-40 °C
Temperature, Operating, Range	-40 to +85 °C
Voltage, Input Range	2.7 to 5.5 V
Voltage, Input, High Level	5.5 V
Voltage, Input, Low Level	2.7 V
Voltage, Output, Maximum	3.9 V
Voltage, Output, Minimum	0.9 V
Voltage, Rated	0.9 to 3.3 V
Width	0.059" (1.5mm)
关键词

Converter Type Step Down  ON Semiconductor Converter Type Step Down  DC-DC Converters Converter Type Step Down  ON Semiconductor DC-DC Converters Converter Type Step Down   Current, Output 600 mA  ON Semiconductor Current, Output 600 mA  DC-DC Converters Current, Output 600 mA  ON Semiconductor DC-DC Converters Current, Output 600 mA   Dimensions 3 x 1.5 x 1 mm  ON Semiconductor Dimensions 3 x 1.5 x 1 mm  DC-DC Converters Dimensions 3 x 1.5 x 1 mm  ON Semiconductor DC-DC Converters Dimensions 3 x 1.5 x 1 mm   Efficiency 96 %  ON Semiconductor Efficiency 96 %  DC-DC Converters Efficiency 96 %  ON Semiconductor DC-DC Converters Efficiency 96 %   Frequency, Switching 1.8 MHz  ON Semiconductor Frequency, Switching 1.8 MHz  DC-DC Converters Frequency, Switching 1.8 MHz  ON Semiconductor DC-DC Converters Frequency, Switching 1.8 MHz   Height 0.039" (1mm)  ON Semiconductor Height 0.039" (1mm)  DC-DC Converters Height 0.039" (1mm)  ON Semiconductor DC-DC Converters Height 0.039" (1mm)   Length 0.118" (3mm)  ON Semiconductor Length 0.118" (3mm)  DC-DC Converters Length 0.118" (3mm)  ON Semiconductor DC-DC Converters Length 0.118" (3mm)   Line Regulation 0.05 %  ON Semiconductor Line Regulation 0.05 %  DC-DC Converters Line Regulation 0.05 %  ON Semiconductor DC-DC Converters Line Regulation 0.05 %   Load Regulation 0.0005 %/mA  ON Semiconductor Load Regulation 0.0005 %/mA  DC-DC Converters Load Regulation 0.0005 %/mA  ON Semiconductor DC-DC Converters Load Regulation 0.0005 %/mA   Mounting Type Surface Mount  ON Semiconductor Mounting Type Surface Mount  DC-DC Converters Mounting Type Surface Mount  ON Semiconductor DC-DC Converters Mounting Type Surface Mount   Number of Outputs 1  ON Semiconductor Number of Outputs 1  DC-DC Converters Number of Outputs 1  ON Semiconductor DC-DC Converters Number of Outputs 1   Number of Pins 5  ON Semiconductor Number of Pins 5  DC-DC Converters Number of Pins 5  ON Semiconductor DC-DC Converters Number of Pins 5   Output Type Adjustable  ON Semiconductor Output Type Adjustable  DC-DC Converters Output Type Adjustable  ON Semiconductor DC-DC Converters Output Type Adjustable   Package Type TSOP  ON Semiconductor Package Type TSOP  DC-DC Converters Package Type TSOP  ON Semiconductor DC-DC Converters Package Type TSOP   Switching Regulator Yes  ON Semiconductor Switching Regulator Yes  DC-DC Converters Switching Regulator Yes  ON Semiconductor DC-DC Converters Switching Regulator Yes   Temperature, Operating, Maximum +85 °C  ON Semiconductor Temperature, Operating, Maximum +85 °C  DC-DC Converters Temperature, Operating, Maximum +85 °C  ON Semiconductor DC-DC Converters Temperature, Operating, Maximum +85 °C   Temperature, Operating, Minimum -40 °C  ON Semiconductor Temperature, Operating, Minimum -40 °C  DC-DC Converters Temperature, Operating, Minimum -40 °C  ON Semiconductor DC-DC Converters Temperature, Operating, Minimum -40 °C   Temperature, Operating, Range -40 to +85 °C  ON Semiconductor Temperature, Operating, Range -40 to +85 °C  DC-DC Converters Temperature, Operating, Range -40 to +85 °C  ON Semiconductor DC-DC Converters Temperature, Operating, Range -40 to +85 °C   Voltage, Input Range 2.7 to 5.5 V  ON Semiconductor Voltage, Input Range 2.7 to 5.5 V  DC-DC Converters Voltage, Input Range 2.7 to 5.5 V  ON Semiconductor DC-DC Converters Voltage, Input Range 2.7 to 5.5 V   Voltage, Input, High Level 5.5 V  ON Semiconductor Voltage, Input, High Level 5.5 V  DC-DC Converters Voltage, Input, High Level 5.5 V  ON Semiconductor DC-DC Converters Voltage, Input, High Level 5.5 V   Voltage, Input, Low Level 2.7 V  ON Semiconductor Voltage, Input, Low Level 2.7 V  DC-DC Converters Voltage, Input, Low Level 2.7 V  ON Semiconductor DC-DC Converters Voltage, Input, Low Level 2.7 V   Voltage, Output, Maximum 3.9 V  ON Semiconductor Voltage, Output, Maximum 3.9 V  DC-DC Converters Voltage, Output, Maximum 3.9 V  ON Semiconductor DC-DC Converters Voltage, Output, Maximum 3.9 V   Voltage, Output, Minimum 0.9 V  ON Semiconductor Voltage, Output, Minimum 0.9 V  DC-DC Converters Voltage, Output, Minimum 0.9 V  ON Semiconductor DC-DC Converters Voltage, Output, Minimum 0.9 V   Voltage, Rated 0.9 to 3.3 V  ON Semiconductor Voltage, Rated 0.9 to 3.3 V  DC-DC Converters Voltage, Rated 0.9 to 3.3 V  ON Semiconductor DC-DC Converters Voltage, Rated 0.9 to 3.3 V   Width 0.059" (1.5mm)  ON Semiconductor Width 0.059" (1.5mm)  DC-DC Converters Width 0.059" (1.5mm)  ON Semiconductor DC-DC Converters Width 0.059" (1.5mm)