LDO Voltage Regulators Manufacturers or Vendors
A Low Dropout (LDO) voltage regulator is a type of linear voltage regulator commonly used in electronic circuits to provide stable and regulated output voltage from an unregulated or fluctuating input voltage.
LDO regulators are known for their ability to maintain a relatively constant output voltage even when the input voltage is very close to the output voltage, hence the term "low dropout."
Key Features of LDO regulator
Following are the key features and characteristics of LDO regulator.
• The primary function of an LDO regulator is to maintain a stable output voltage regardless of changes
in the input voltage or load conditions. This is achieved by using feedback control to adjust the internal
circuitry to compensate for variations in the input voltage and load current.
• LDO regulators typically have very low dropout voltages, often in the range of tens of millivolts
to a few hundred millivolts, allowing them to operate with input voltages very close to the desired output voltage.
• LDO regulators operate in a linear regulation mode, meaning they dissipate excess voltage as heat to
maintain the output voltage.
• LDO regulators have a quiescent current, also known as the ground current or operating current, which is the
current consumed by the regulator itself when no load is connected.
• Many LDO regulators include built-in protection features such as thermal shutdown, overcurrent protection, and reverse current protection to prevent damage to the
regulator and connected components under fault conditions.
• LDO regulators typically require an external output capacitor to stabilize the output
voltage and improve transient response.
LDO regulator Selection Criteria
Following specifications or parameters are considered for selection of appropriate LDO voltage regulator.
• Input Voltage Range
• Output Voltage
• Output Current Rating
• Dropout voltage
• Quiescent current (Iq)
• Load Regulation
• Line Regulation
• Temperature range
• Package Type
• Additional features (if any)
LDO Voltage Regulators Vendors
Following table mentions LDO Voltage Regulators Vendors with respective features.
| LDO Voltage Regulators Vendors | Description |
|---|---|
| Texas Instruments (TI) | Part number : LM1117-ADJ |
| Analog Devices (ADI) | Part number : ADP150 |
| STMicroelectronics | Part number : L7805CV |
| Maxim Integrated (Now part of Analog Devices) | Part number : MAX603 |
| Microchip Technology | Part number : MCP1702 |
| Infineon Technologies | Part numbers : LDOs TLS205x, TLS203x, TLS208x devices |
| Renesas Electronics | Part number : ISL9000 |
| ON Semiconductor | Part number : NCP1117 |
| Semtech Corporation | Part number : TS30041 |
| Diodes Incorporated | Part number : AP130 and other ICs in AP series |
Overall, LDO voltage regulators provide a simple and effective solution for providing stable and regulated output voltage in a wide range of electronic applications, including battery-powered devices, sensors, microcontrollers, and communication systems.