PT5109A

Current - Output (Max):	1A
Base Part Number:	PT5109
Size / Dimension:	1.00" L x 1.02" W x 0.38" H (25.4mm x 25.9mm x 9.7mm)
Package / Case:	3-SIP Module
Mounting Type:	Through Hole, Right Angle
Efficiency:	90%
Operating Temperature:	-40°C ~ 85°C
Features:	OCP, OTP
Applications:	ITE (Commercial)
Power (Watts):	5W
Series:	PT5100
Voltage - Output 3:	--
Voltage - Output 2:	--
Voltage - Output 1:	5.6V
Voltage - Input (Max):	38V
Voltage - Input (Min):	9.6V
Number of Outputs:	1
Type:	Linear Regulator Replacement
Part Status:	Obsolete
Packaging:	Tray

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

DC DC Converters

DC DC converters are electronic devices used to convert direct current (DC) power from one voltage level to another. They can provide either isolated or non-isolated power conversion between different DC voltage levels. The PT5109A is a monolithic step-down DC-DC converter, with an integrated low on-resistance power LDO, designed for applications in automotive infotainment systems.

PT5109A Overview

The PT5109A is available in a thermally enhanced 3-pin, SOT23-5 package, with an operating temperature range of -40°C to +125°C. It is capable of converting input voltages between 4.5V and 14V down to regulated outputs from 0.8V to 3.3V.The device has a built-in soft-start that allows for a smooth in-rush current and it also features two independent power-On/Off pins for on/off sequencing or multi-rail systems. The PT5109A operates with a maximum output current of 1.2A, a switching frequency of 1.8MHz, and a quiescent current of 1.0mA.

PT5109A Applications

The PT5109A is designed to be used in automotive infotainment systems, such as CD players, DVD players, navigation systems, and other similar applications. The device can be used to power multiple cores on the same board or to generate the supply voltage for various peripheral ICs.It is also designed for power management in wearable, IoT (Internet of Things) and mobile device applications. The device is capable of supporting multiple supply rails with minimal components and is designed for a maximum switching frequency of 1.8MHz, that enables small size components for the power stage.

PT5109A Working Principle

The PT5109A is a single chip switching regulator designed for applications requiring high efficiency DC-DC power conversion. The device consists of a high-efficiency step-down switch-mode regulator which uses an internal power field-effect transistor (FET) to convert a DC input voltage to a lower regulated DC output voltage.The device operates in a pulse-width modulation (PWM) mode, with a fixed off-time cycle. The output voltage is adjusted through an internal resistor divider, and the maximum output current is limited by an internal thermal foldback protection circuit. The PWM frequency is 1.8MHz allowing for the use of small size components for the power stage.The PT5109A also has high-side latching protection circuitry that detects an output voltage that is higher than the voltage set by the internal resistor divider and then forces the power switch off. In addition, the device features over-temperature protection.

Conclusion

The PT5109A is a single-chip, step-down DC-DC converter, designed for applications in automotive infotainment systems. It is capable of converting input voltages between 4.5V and 14V down to regulated outputs from 0.8V to 3.3V, with a maximum output current of 1.2A. It operates with a switching frequency of 1.8MHz and a quiescent current of 1.0mA. The device features multiple safety protections, such as over-voltage and over-temperature protection.

The specific data is subject to PDF, and the above content is for reference

Part Number	Manufacturer	Price	Quantity	Description