TC1044SMJA

Voltage - Output (Min/Fixed):	-Vin
Base Part Number:	TC1044
Supplier Device Package:	8-CERDIP
Package / Case:	8-CDIP (0.300", 7.62mm)
Mounting Type:	Through Hole
Operating Temperature:	-55°C ~ 125°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	10kHz, 45kHz
Current - Output:	20mA
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	12V
Voltage - Input (Min):	1.5V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Charge Pump
Output Configuration:	Negative
Function:	Ratiometric
Part Status:	Obsolete
Packaging:	Tube

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Introduction

TC1044SMJA is a DC-DC switching regulator, which belongs to the Voltage Regulators category that can be found within PMICs (Power Management ICs). These ICs are responsible for receiving and supplying power to a wide array of consumer electronics, industrial and military hardware, as well as communication equipment. This particular model comes in a four-pin SOT-23 SMD package and offers excellent performance when used to convert a given input voltage into an output at a different magnitude and/or phase. Furthermore, it is rated for an operating voltage range from 2.5V to 6V and an output current of up to 300mA.

Features and Benefits

TC1044SMJA comes with a plethora of features that make it an ideal voltage regulator for a wide range of applications. The most prominent of these are its low quiescent current, high efficiency, and excellent line and load regulation. Its current-mode architecture also allows for a tight load regulation, making it better-suited for applications that require accuracy and reliability. Additionally, the device utilizes a unique dynamic-frequency transition scheme, which ensures a low-noise, efficient transition. This feature combined with its wide input voltage range, low noise mode, and reduced start-up/shutdown times make it an ideal choice for noise-sensitive environments.

Applications

The TC1044SMJA DC-DC switching regulator is ideal for a wide range of applications including portable computers and communications systems, consumer electronics, instrumentation, industrial automation and automotive applications. Its features make it suitable for a wide range of high current applications up to 300mA with either a linear or switchmode output. Additionally, it can be used for driving multiple step-up and step-down converter combinations, providing high efficiency, good line and load regulation, excellent current-mode control, and fast transition times.

Working Principle

The working principle of TC1044SMJA is based on the well-known current-mode topology. It utilizes a dual-loop control system where the inner loop maintains accurate regulation with respect to line and load variability and the outer loop maintains the switching frequency.The device operates in either pulse frequency modulation (PFM) or pulse-width modulation (PWM) mode, depending on the output current requirement. In PFM mode, the voltage ripple on the output is low because the device pulses only when the load current rises above a certain threshold. In PWM mode, the output voltage is more regulated since the device is constantly pulsing at a fixed switching frequency. This frequency is determined by the external components.The device also provides a soft-start function which prevents overloading of the input power supply. Additionally, the device has a thermal shutdown feature that prevents overheating.

Conclusion

The TC1044SMJA is a high-performance DC-DC switching regulator that provides excellent line and load regulation, accurate current mode control, and a dynamic frequency transition scheme. Its ability to support a wide voltage range and high current output makes it suitable for a wide range of applications such as portable computers, consumer electronics, instrumentation, and automotive applications. The device\'s features also make it ideal for driving multiple step-up and step-down converter combinations, providing high efficiency, good line and load regulation, and fast transition times.

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