PT6938N

Voltage - Output 3:	--
Base Part Number:	PT6938
Size / Dimension:	2.58" L x 0.60" W x 1.02" H (65.5mm x 15.2mm x 25.9mm)
Package / Case:	23-SIP Module
Mounting Type:	Through Hole
Efficiency:	79%
Operating Temperature:	-40°C ~ 85°C
Features:	--
Applications:	ITE (Commercial)
Current - Output (Max):	8.6A, 1.6A
Series:	Excalibur™ PT6935
Voltage - Output 2:	1.2V
Voltage - Output 1:	3.3V
Voltage - Input (Max):	5.5V
Voltage - Input (Min):	4.5V
Number of Outputs:	2
Type:	Non-Isolated PoL Module
Part Status:	Obsolete
Packaging:	Tray

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DC DC Converters, such as PT6938N are widely used in various applications. In this article, we discuss the application field and working principle of PT6938N.The PT6938N is a high efficiency DC/DC step-down converter with a wide input voltage range. It can be used to convert an input voltage from 2.7V to 36V to a regulated output voltage of 1.8V to 33V. This converter has a maximum output current of 3.6A, and an operating temperature range of -40 to +85°C.The PT6938N features an integrated low start-up current and internal soft start function for low noise operation. It also features an active burst mode to reduce quiescent current and maximize efficiency in light load operations. The integrated internal inductor also enables a wide output voltage range.The PT6938N works in a synchronous buck-mode topology, which is preferred for low output voltage and very high efficiency applications. In this mode, a power MOSFET switch is connected in series with the input voltage, and an integrated power inductor is connected between the switch and the output. During the on-time of the switch, the inductor stores energy, and during the off-time it releases the energy at a regulated output voltage.An on-chip peak current sense circuit is provided to accurately limit the peak current drawn from the input source. This circuit includes MOSFETs and resistors to sense the peak voltage drop across the switch and set the corresponding current limit. The current limit helps to ensure that the switch does not exceed its maximum current rating during operation.The PT6938N is suitable for a variety of applications, such as battery powered devices, automotive applications, wireless communication systems, industrial equipment and computer peripherals. The wide operating temperature range and high maximum output current makes it ideal for low voltage, high efficiency and high current applications.In summary, the PT6938N is a high efficiency DC/DC step-down converter that is suitable for a variety of applications. The integrated low start-up current, active burst mode and internal soft start functions allow for a low noise operation and maximum efficiency in light load operations. The integrated internal inductor also enables a wide output voltage range. The on-chip peak current sense circuit helps to ensure that the switch does not exceed its maximum current rating during operation. The wide operating temperature range and high maximum output current makes the PT6938N an ideal choice for low voltage, high efficiency and high current applications.

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