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# Example questions:
➢ What is the typical output voltage for the le25ab regulator when the input voltage is 4.5v and the output current is 10ma?
➢ What is the typical quiescent current of the le25ab regulator when it is in on mode and there is no load (io = 0ma)?
➢ Compare the maximum output current limit for the le25ab and le25c regulators. are they the same?
| Part No. | LE40C |
| Manufacturer | STMICROELECTRONICS |
| Size | 908 Kbytes |
| Pages | 39 pages |
| Description | Very low drop voltage regulators with inhibit |
Document Overview:
The document is a datasheet providing electrical characteristics for a series of low dropout (LDO) voltage regulators. Specifically, it details the specs for the following models:
️· LE25AB
️· LE25C
️· LE25AB (appears twice - potential duplicate)
Key Electrical Characteristics (Common to all models, but with varying values):
️· Output Voltage (VO): Varies by model (2.5V, 2.475V, 2.45V). The tables give the typical and range of output voltage.
️· Operating Input Voltage (VI): Usually up to 18V.
️· Output Current Limit (IO): 150mA.
️· Line Regulation: The change in output voltage for a change in input voltage. Values range from 3mV to 20mV depending on the model.
️· Load Regulation: The change in output voltage for a change in load current. Values range from 3mV to 25mV depending on the model.
️· Quiescent Current (Id): Current drawn by the regulator itself.
- ON Mode: Typically 0.5-1mA.
- OFF Mode: Typically 50-100uA.
️· Supply Voltage Rejection (SVR): How well the regulator maintains a stable output voltage despite fluctuations in the input voltage. Generally around 82dB at 120Hz, 77dB at 1kHz and 60dB at 10kHz.
️· Output Noise Voltage (eN): Around 50uV.
️· Dropout Voltage (Vd): The minimum difference between input and output voltage needed for the regulator to maintain regulation. Ranges from 0.2-0.5V depending on the model and temperature.
️· Control Input Logic: Specifies voltage levels for controlling the regulator (VIL/VIH).
️· Recommended Output Bypass Capacitance (CO): 2-10uF with an ESR of 0.1 to 10 Ohms.
Differences Between Models:
️· LE25AB and LE25C have slightly different specs for line regulation, load regulation, and dropout voltage.
️· The LE25C has higher limits and wider ranges for some parameters.
Important Notes:
️· All values are given with specific test conditions (e.g., temperature, input voltage, output capacitance).
️· The tables provide *typical* values, as well as *minimum* and *maximum* values that can be expected.
️· Focus on the differences between specific models.
️· Summarize a particular characteristic across all models.
️· Extract any other specific information from the text.
Document Overview:
The document is a datasheet providing electrical characteristics for a series of low dropout (LDO) voltage regulators. Specifically, it details the specs for the following models:
️· LE25AB
️· LE25C
️· LE25AB (appears twice - potential duplicate)
Key Electrical Characteristics (Common to all models, but with varying values):
️· Output Voltage (VO): Varies by model (2.5V, 2.475V, 2.45V). The tables give the typical and range of output voltage.
️· Operating Input Voltage (VI): Usually up to 18V.
️· Output Current Limit (IO): 150mA.
️· Line Regulation: The change in output voltage for a change in input voltage. Values range from 3mV to 20mV depending on the model.
️· Load Regulation: The change in output voltage for a change in load current. Values range from 3mV to 25mV depending on the model.
️· Quiescent Current (Id): Current drawn by the regulator itself.
- ON Mode: Typically 0.5-1mA.
- OFF Mode: Typically 50-100uA.
️· Supply Voltage Rejection (SVR): How well the regulator maintains a stable output voltage despite fluctuations in the input voltage. Generally around 82dB at 120Hz, 77dB at 1kHz and 60dB at 10kHz.
️· Output Noise Voltage (eN): Around 50uV.
️· Dropout Voltage (Vd): The minimum difference between input and output voltage needed for the regulator to maintain regulation. Ranges from 0.2-0.5V depending on the model and temperature.
️· Control Input Logic: Specifies voltage levels for controlling the regulator (VIL/VIH).
️· Recommended Output Bypass Capacitance (CO): 2-10uF with an ESR of 0.1 to 10 Ohms.
Differences Between Models:
️· LE25AB and LE25C have slightly different specs for line regulation, load regulation, and dropout voltage.
️· The LE25C has higher limits and wider ranges for some parameters.
Important Notes:
️· All values are given with specific test conditions (e.g., temperature, input voltage, output capacitance).
️· The tables provide *typical* values, as well as *minimum* and *maximum* values that can be expected.
️· Focus on the differences between specific models.
️· Summarize a particular characteristic across all models.
️· Extract any other specific information from the text.
| Part No. | LE40C |
| Manufacturer | STMICROELECTRONICS |
| Size | 908 Kbytes |
| Pages | 39 pages |
| Description | Very low drop voltage regulators with inhibit |
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