TC1313-1H0EUNTR

Voltage/Current - Output 3:	--
Base Part Number:	TC1313
Supplier Device Package:	10-MSOP
Package / Case:	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Voltage - Supply:	2.7 V ~ 5.5 V
w/Sequencer:	No
w/Supervisor:	No
w/LED Driver:	No
Series:	--
Voltage/Current - Output 2:	2.6V, 300mA
Voltage/Current - Output 1:	1.375V, 500mA
Frequency - Switching:	2MHz
Number of Outputs:	2
Function:	Any Function
Topology:	Step-Down (Buck) Synchronous (1), Linear (LDO) (1)
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

A PMIC (power management IC) is an integrated circuit (IC) designed to help a designer manage the power requirements of a system. It is used for regulating voltages, current and power in all types of electronic devices such as computers, mobile phones, and other consumer electronics. Voltage regulators are an important part of a PMIC and are used to regulate the voltages to an appropriate level for the device being powered. Linear and switching voltage regulators are two common voltage regulation techniques for regulating the voltage. The TC1313-1H0EUNTR is a high efficiency linear + switching voltage regulator from Texas Instruments. This article provides an overview of the application field and working principle of the TC1313-1H0EUNTR.

Application Field of TC1313-1H0EUNTR

The TC1313-1H0EUNTR is designed to provide a high efficiency linear + switching voltage regulation solution for applications like smartphones, tablets and notebook PCs. It is a step-down switching regulator with selectable output current up to 1.5A. It also has a dual-mode linear regulator with output current up to 500mA to improve light load efficiency. The output voltage of the TC1313-1H0EUNTR can be adjusted from 0.8V to 4.3V. This makes it ideal for several applications that require multiple voltage rails or adjustable voltage outputs. It is also pin compatible with the TC1310A-1H0DTIN package, so it can be used as a drop-in replacement to help reduce system design costs.

Working Principle of TC1313-1H0EUNTR

The TC1313-1H0EUNTR is a high efficiency linear + switching voltage regulator that consists of a Step-Down Switching (SDS), Linear Regulator (LDO) with dual-mode support, Internal Over Current Protection (OCP), and an Adjustable & Fixed Output Voltage (FV) Generator. The SDS section in the TC1313-1H0EUNTR is responsible for the high efficiency voltage regulation. It consists of an input voltage detector, switch, and inductor. The input voltage detector detects the input voltage and selects the appropriate reference voltage for the control loop. The switch is then used to control the flow of current through the inductor. The output voltage is regulated by the adjustment of the duty cycle of the switch. This is done by varying the on and off times of the switch based on the reference voltage set by the input voltage detector. The LDO section in the TC1313-1H0EUNTR helps to improve the light load efficiency. It consists of a bipolar operational amplifier and a pass transistor. The polarity of the output voltage is set by the non-inverting input of the operational amplifier. The pass transistor is then used to control the current flow from the input to the output based on the reference voltage set by the output voltage adjustment pin. The OCP section in the TC1313-1H0EUNTR is used to protect the device from over-current events. It consists of a current sense amplifier and a current limit driver. The current sense amplifier detects the current in the output and compares it to the limit set by the external resistor. When the sensed current exceeds the limit, the current limit driver will shut off the switch and the regulator will go into a current limited state. The FV generator in the TC1313-1H0EUNTR generates the fixed reference voltage that is used to control the SDS and LDO sections. It is also responsible for setting the output voltage of the regulator. It consists of an adjustable voltage clock and a reference generator. The adjustable voltage clock sets the output voltage of the regulator by varying the frequency of the reference signal generated by the reference generator.

Conclusion

The TC1313-1H0EUNTR is a high efficiency linear + switching voltage regulator from Texas Instruments that is designed to provide a high efficiency voltage regulation solution for applications like smartphones, tablets and notebook PCs. It is a step-down switching regulator with selectable output current up to 1.5A and a dual-mode linear regulator with output current up to 500mA. The TC1313-1H0EUNTR consists of a Step-Down Switching (SDS), Linear Regulator (LDO) with dual-mode support, Internal Over Current Protection (OCP), and an Adjustable & Fixed Output Voltage (FV) Generator. These components work together to regulate the output voltage of the regulator in a highly efficient manner.

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