LD39200DPUR
Part Number: LD39200DPUR
Manufacturer: STMicroelectronics
Description: LDO Voltage Regulators
Shipped from: Shenzhen/HK Warehouse
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LD39200DPUR Description
The LD39200DPUR has a typical dropout voltage of 130 mV, an input voltage range of 1.25 V to 6.0 V, and a maximum current of 2 A. Ceramic capacitors (10 F) at the output ensure reliability. At 1 kHz, a typical power supply will have a rejection ratio of 70 dB, and this ratio will begin to drop off at about 20 kHz. The LD39200 can be put into a power-saving sleep mode with the help of the enable logic control function, reducing the overall current draw to just 10 nA. (typ.). A Power Good flag pin is now available. The gadget is additionally protected against overheating, short-circuiting, and reverse currents. Common usages include consumer and enterprise telecom systems.
LD39200DPUR Features
- Has a wide operating input voltage range (1.25% to 6.0%).
- The typical voltage drop for 2 A loads is only 130 mV.
- Features Accuracy of 1% at 25 °C for output and 2% across the entire temperature range.
- Having a very respectable PSRR (70 dB at 1 kHz).
- Features Safety from induced eddy currents.
- Has a minimum output current of 2 A and a maximum of 2 A.
- Its output voltage can be set at a fixed value or adjusted in 100 mV increments starting at 0.5 V.
- Features In-house current and temperature restraints.
- There is a -40 C to 125 C operating temperature windows at the connection.
- Has both DFN6 (3 x 3 mm) and DFN8 (4 x 4 mm) packaging.
Application Information
● Thermal and short-circuit protections
The LD39200 has built-in protection against overheating and circumstances involving a short circuit. When the output load is greater than the one that the device can handle, the output current increases until it reaches the limit, which is usually 3.5 A; once this limit is achieved, the current remains constant even when the load’s impedance is zero. The thermal protection kicks in when the junction temperature hits 170 degrees Celsius. The IC will now transition into the shutdown status. The gadget will begin functioning normally once more as soon as the junction temperature drops below 150 degrees Celsius.
● Output Voltage Setting For Adj Version
By connecting a resistor divider between the ADJ pin and the output, the adjustable version’s output voltage can be set anywhere from 0.5 V up to the input voltage minus the voltage drop across the pass transistor (dropout voltage). This allows for remote voltage sensing. In the fixed version, the output voltage cannot be set higher than the input voltage.
● Enable Pin
There is an enable function available on the LD39200. The device is considered to be ON when the voltage of the EN is more significant than 1.2 V, and it is considered to be OFF when the value of the EN is less than 0.5 V. In the power-saving mode, the total amount of current drawn is just 10 nA. (typ). Since the EN pin does not have an internal pull-up, it cannot float without being utilized because it cannot be disconnected.
● Reverse Current Protection
The component blocks current from the output to the input in both working circumstances (EN=0 or EN=1, VIN>VOUT+VDROP). This function prevents a large current from flowing to the information when the quick turn-on/off operation occurs. In addition, it is utilized to avoid the flow of current in the opposite direction from the output pin to the input one when additional power supplies that provide a higher voltage than the input voltage are connected to the output pin. If the OUT pin of the LDO is connected to a power supply that provides a voltage lower than the voltage that the LDO outputs, the LDO will work in current protection, which will cause substantial power consumption within the device. A slight current, measured in microamperes (few A), is drawn from the OUT pin even when the device in question is disabled (EN is set to a low value).
● Power Good pin (PG)
A flag indicating that the output voltage is within the appropriate range is necessary for specific applications. Power The output voltage is a crucial factor in determining a reasonable threshold. When the output voltage is more than 0.92 times the nominal value of VOUT, the PG pin will transition to a high impedance state. If the output voltage is less than 0.80 times the nominal value of VOUT, the PG pin will change to a low impedance state. The PG pin will have a high impedance if the apparatus functions correctly.
What Is a Linear Voltage Regulator?
Electronic systems almost always get a voltage from their power supply higher than the voltage necessary for the circuitry inside the system. For instance, a 9 V battery might be used to provide power to an amplifier that requires an input range of 0 to 5 V. Two 1.5 V batteries connected in series could supply power to a circuit with 1.8 V digital logic. In situations like these, we must regulate the input power with a component capable of accepting a higher voltage and producing a lower voltage.
Incorporating a linear voltage regulator is one of the most often used methods for achieving this regulation.
How Does a Linear Voltage Regulator Work?
Low-dropout linear regulators (LDOs) are a type of linear voltage regulator that uses a transistor and a negative-feedback circuit to maintain an output voltage at a constant value regardless of changes in the input voltage and load current. The term “low-dropout linear regulator” can be used to describe a type of linear voltage regulator.
Conclusion
Although linear regulators are often less efficient than switching regulators, they are still commonly utilized for various reasons. The low output noise, low price, and simplicity of usage are three significant benefits. Input and output capacitors are typically the only external components needed for linear regulators, and the wide range of possible capacitance values simplifies the design process.
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