LM3208UR/NOPB

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Applications:	Converter, RF Power Amplifier
Voltage - Input:	2.7 V ~ 5.5 V
Number of Outputs:	1
Voltage - Output:	0.8 V ~ 3.6 V
Operating Temperature:	-30°C ~ 85°C
Mounting Type:	Surface Mount
Package / Case:	8-WFBGA
Supplier Device Package:	8-TuSMD
Base Part Number:	LM3208

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<p>The LM3208UR/NOPB is a step-down voltage regulator, offered by Texas Instruments, which is comes in an 8-SOIC package and is made with Pb-Free and Halogen-Free material. It has a wide input voltage range (4.5V to 40V), a high efficiency output, controlled by a voltage feedback reference (up to 1.2A, 4.2V). The LM3208UR/NOPB can be used in multiple power applications, including cell phone handsets, and infotainment/multi-media systems. Its wide range of input voltages and able to handle up to 1.2A output at 4.2V, make it an ideal candidate for smaller mobile devices.</p><p>The LM3208UR/NOPB voltage regulator has several features which makes it a popular choice for many applications. The features include internal soft-start to limit the inrush current, load regulation over temperature, and a wide input to output differential 1V. The feedback reference voltage can be programmed using an external resistor network and its 1V, 2V, or 3V is adjustable. It is also possible to adjust the frequency of the voltage regulator oscillator to reduce output ripple. Other features such as linearly-reducing noise modulation, dynamic voltage scaling, and an internal temperature-compensated current-limit make the LM3208UR/NOPB voltage regulator suitable for many applications.</p><p>The LM3208UR/NOPB is a special purpose voltage regulator which is designed for portable or mobile applications. It provides low power dissipation (due to the high efficiency) plus low output noise and noise modulation which is ideal for portable applications. It is easy to use, with features such as enable/disable, internal soft-start and frequency adjustment. The voltage regulator also provides adjustable current limit and its output voltage can be adjusted with an external resistor network.</p><p>In order to understand the working principle of the LM3208UR/NOPB, it is important to understand the voltage regulator track and feedback topology used in the device. The voltage regulator track is composed of a power stage and the feedback stage. First, the power stage is used to generate the regulated voltage. The power stage consists of an operational amplifier, power MOSFET which acts as the controlling element and capacitors which act as the energy storage elements. The output voltage of this stage is then fed back to the feedback stage, which uses an analog-to-digital converter. The data from the analog to digital converter is then used by the voltage regulator to adjust the output voltage. This loop is used to maintain the desired output voltage and is known as the "closed loop" operation.</p><p>The LM3208UR/NOPB is ideal for applications that require efficient performance and low power dissipation, such as cell phone handsets and other portable devices. Its wide input voltage range and its ability to handle up to 1.2A output at 4.2V, make it an ideal choice for small form-factor and high-efficiency mobile devices. Its various features such as enable/disable, internal soft-start, frequency adjustment, and adjustable current limit makes it an ideal candidate for today\'s portable devices.</p>

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