TPS62112RSARG4

Voltage - Output (Min/Fixed):	5V
Base Part Number:	TPS62112
Supplier Device Package:	16-QFN (4x4)
Package / Case:	16-VQFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	Yes
Frequency - Switching:	1MHz
Current - Output:	1.5A
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	17V
Voltage - Input (Min):	3.1V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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TPS62112RSARG4 Application Field And Working Principle

The TPS62112RSARG4 from Texas Instruments is a high-efficiency, integrated synchronous buck DC-DC converter with a wide VIN operating range and up to 1.2A output current. This switching regulator is specifically designed for low-power, high-efficiency voltage conversion applications, such as battery powered systems, that require a compact size, low shutdown current, and low external component count.

Features

The TPS62112RSARG4 provides a wide range of features and benefits, including:- High switching frequency of 1.8MHz, low external component count, low-noise operation, and tiny SOT23-6 package- Integrated high-side and low-side power MOSFETs and a valley-mode control scheme- Low-power shutdown mode (<100μA)- Output range from 0.45V to 1.2V- Input voltage range from 2.7V to 5.5V- Internal soft-start- Output over-voltage protection- POR-based thermal foldback circuitry- Output short-circuit protection- Current-limiting and thermal shutdown protection- Reverse-current and over-temperature protection

Applications

The TPS62112RSARG4 is suitable for a variety of applications, including but not limited to digital cellular phones, SDRAM, flash memory and other applications that require low-voltage, low-power DC/DC conversion.

Working Principle

The TPS62112RSARG4 uses a valley-mode synchronous buck regulator topology, with integrated MOSFETs, to provide high efficiency, low noise and low component count.The valley-mode control scheme is a type of PWM control that utilizes the peak current mode control architecture. This control scheme allows the switching regulator to maintain a peak current of a preset value by varying the duty cycle of the switching MOSFETs. This allows the inductor current to remain close to the preset peak current, resulting in more efficient operation.The TPS62112RSARG4 operates at a fixed 1.8 MHz frequency and is protected with an adjustable current limit, over-voltage and thermal shutdown protection. The device also includes a power-on reset (POR) for initializing the system, as well as an internal soft-start circuit for protecting the output from large inrush current upon start-up.

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