The part number "LM27762DSSR" is a voltage regulator IC from Texas Instruments. Specifically, it is a low-noise, high-efficiency DC-DC step-up regulator.
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Part Number: LM27762DSSR
Brand: Texas Instruments Package Type: SOT-23-6 (6 pins, a small surface-mount package)Pin Function Description
Below is the detailed description of each pin's function in the LM27762DSSR based on its SOT-23-6 package.
Pin Number Pin Name Pin Function Description 1 IN Input Voltage Pin. This is where the input voltage is supplied. The input range is typically between 1.8V to 5.5V. 2 GND Ground Pin. This pin connects to the ground of the circuit. 3 FB Feedback Pin. This pin is used to set the output voltage of the regulator via a feedback resistor divider. The LM27762 has a regulated output voltage, which is determined by the feedback resistor network. 4 OUT Output Voltage Pin. This is the pin where the regulated output voltage is provided to the load. 5 SW Switch Pin. This pin connects to the switching node that drives the inductor. It is used in the internal switching mechanism of the regulator. 6 EN Enable Pin. This pin is used to turn the regulator on or off. A high logic level enables the IC, while a low logic level disables it (puts the IC in low-power mode).Packaging Type and Pin Configuration
Package Type: SOT-23-6 Pins Count: 6 pinsThis package is compact and typically used for low-power applications requiring a small form factor.
Pin Function Details
Each of the pins in the SOT-23-6 package corresponds to a specific function, as described in the table above. The IC works by taking an input voltage from IN, stepping it up through the SW pin, and providing a stable regulated output voltage at the OUT pin.
Circuit Principle
The LM27762DSSR is a boost converter with a PWM control mechanism. The output voltage is set using the feedback mechanism (FB pin), while the switch pin (SW) connects to an external inductor to store and release energy, creating a high-efficiency step-up conversion. The Enable Pin (EN) helps control the power state of the IC, and the GND pin ensures a common reference for the device.
FAQ for LM27762DSSR (Frequently Asked Questions)
What is the input voltage range for the LM27762DSSR? The input voltage range for the LM27762DSSR is from 1.8V to 5.5V. What is the output voltage range? The output voltage range for the LM27762DSSR is set by an external resistor divider and can be adjusted from 2.5V to 5.5V. How do I calculate the output voltage for the LM27762DSSR? The output voltage can be calculated using the feedback resistor divider equation: [ V{OUT} = V{REF} \times \left( 1 + \frac{R2}{R1} \right) ] Where ( V_{REF} ) is 1.25V (typical for LM27762). What is the maximum output current the LM27762DSSR can supply? The maximum output current is typically 100mA, but it depends on the input voltage and output voltage settings. What is the efficiency of the LM27762DSSR? The efficiency can typically reach up to 80-90%, depending on the input and output voltages and the load current. What is the switching frequency of the LM27762DSSR? The switching frequency is around 1.2 MHz. Can the LM27762DSSR operate at low voltages? Yes, the LM27762DSSR can efficiently boost voltages from as low as 1.8V to higher values, making it ideal for battery-powered applications. What is the purpose of the EN pin in the LM27762DSSR? The EN (Enable) pin controls whether the IC is turned on or off. When the voltage on this pin is high, the IC is enabled; when low, the IC is disabled. Is there any thermal shutdown protection in the LM27762DSSR? Yes, the LM27762DSSR has thermal shutdown protection to prevent the IC from overheating.What type of inductor should be used with the LM27762DSSR?
A 10µH inductor is typically used with the LM27762DSSR for optimal performance.Can I use capacitor s with a lower value than recommended for the LM27762DSSR?
It is recommended to use capacitors with values close to the recommended ones for stability and optimal performance. Using lower values may affect the efficiency and performance.What are the key advantages of using the LM27762DSSR?
High efficiency, low noise, and small form factor are the primary advantages of this device.Is the LM27762DSSR suitable for portable battery-powered devices?
Yes, the LM27762DSSR is ideal for battery-powered applications due to its low input voltage and high efficiency.Can the LM27762DSSR be used for both positive and negative voltage conversion?
No, the LM27762DSSR is designed specifically for boosting positive input voltages to a higher positive output.What is the quiescent current of the LM27762DSSR?
The typical quiescent current is 30µA.What is the maximum output voltage of the LM27762DSSR?
The maximum output voltage is typically 5.5V.Does the LM27762DSSR have overcurrent protection?
Yes, the LM27762DSSR includes overcurrent protection to prevent damage under high load conditions.What is the operating temperature range for the LM27762DSSR?
The operating temperature range is from -40°C to +125°C.Can the LM27762DSSR be used with a 3.3V input?
Yes, the LM27762DSSR can work with a 3.3V input and provide higher output voltages.How do I disable the LM27762DSSR?
The LM27762DSSR can be disabled by pulling the EN pin low.This detailed description covers the pin functions, the circuit principle, and answers to common questions about the LM27762DSSR. Let me know if you need further assistance!
