TC1303B-VA0EMF

Voltage/Current - Output 3:	--
Base Part Number:	TC1303B
Supplier Device Package:	10-DFN (3x3)
Package / Case:	10-VFDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Voltage - Supply:	2.7 V ~ 5.5 V
w/Sequencer:	Yes
w/Supervisor:	No
w/LED Driver:	No
Series:	--
Voltage/Current - Output 2:	3.3V, 300mA
Voltage/Current - Output 1:	1.2V, 500mA
Frequency - Switching:	2MHz
Number of Outputs:	2
Function:	Any Function
Topology:	Step-Down (Buck) Synchronous (1), Linear (LDO) (1)
Part Status:	Active
Packaging:	Tube

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TC1303B-VA0EMF: Application Field and Working PrinciplePMIC (Power Management IC) has become an important part of the modern electronic system, and it can manage the power of the electronic device in order to make sure the efficient power utilization and long-term sustained performance. One of the prominent PMICs is the combination of linear and switching regulators, also known as TC1303B-VA0EMF. Here we would talk about its application field and working principle.TC1303B-VA0EMF is an economical and efficient solution for all kinds of low-to-medium power system. Its low voltage operation capability (ranging from 0.5V to 3.6V) makes it even more versatile. Moreover, with switching and linear regulator technology, TC1303B-VA0EMF can support a wide range of working currents, which is up to 500mA, and yet provide very high accuracy of output voltage. Besides the creativity design, TC1303B-VA0EMF is also featured with extreme low quiescent current, which is only around 5 μA. The low noise operation also makes it ideal for applications that requires high EMIperformance. Furthermore, an internal soft-start circuit minimizes the input current during start-up, making sure that no in-rush current will be generated.Generally speaking, TC1303B-VA0EMF is a perfect PMIC for projects that requires low voltage, low current, high accuracy, and extreme low quiescent current. Some specific scenarios for such PMIC includes: battery powered systems, consumer electronics, LED Lighting, IoT, wearable devices, and so on. Now let\'s take a closer look at how TC1303B-VA0EMF works. In the most basic term, the output voltage of TC1303B-VA0EMF is generated by a buck-boost converter. This buck-boost converter consists of two stages, the switching stage and the linear stage. In the first stage, the input voltage is step-down by the switching regulator, which will result in an output voltage of 100mV to 3V. In this stage, the switch frequency of the converter can be adjusted to optimize the power efficiency. In the second stages, the voltage is further regulated with a linear regulator, in order to reach the exact output voltage of the TC1303B-VA0EMF. During this stage, the external resistors play a critical role, since they are used to adjust the voltage to the desired level. Apart from that, the output voltage can also be adjusted by the internal voltage reference. To sum up, the workflow of TC1303B-VA0EMF is as simple as this: The step-down switching regulator will reduce the voltage from the input voltage to 3V, then the output voltage will be regulated by the linear regulator to reach the desired level, this is the workflow of TC1303B-VA0EMF. It can provide very stable, precise, highly efficient and low quiescent current performance in a variety of applications. The ease of use, together with the durability and reliability, makes it an ideal choice for a PMIC.

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