Overview
The MC78LC30NTR is a fixed output low dropout linear regulator from onsemi, designed for handheld communication equipment and portable battery-powered applications. This device is part of the MC78LC00 series and is housed in the micro-miniature Thin SOT23-5 surface mount package. It is characterized by its ultra-low quiescent current, making it ideal for power-efficient designs.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Output Voltage (TA = 25°C, Iout = 1.0 mA) | Vout | 2.94 | 3.0 | 3.06 | V |
| Output Voltage (TA = −40°C to 85°C) | Vout | 2.910 | 3.0 | 3.09 | V |
| Line Regulation (Vin = VO(nom.) + 1.0 V to 12 V, Iout = 1.0 mA) | Regline | -0.05 | - | 0.2 | %/V |
| Load Regulation (Iout = 1.0 mA to 10 mA) | Regload | -40 | - | 60 | mV |
| Output Current (Vin = 5.0 V) | Iout | - | - | 80 | mA |
| Dropout Voltage (Iout = 1.0 mA, Measured at Vout - 3.0%) | Vin-Vout | - | - | 30 | mV |
| Quiescent Current (Iout = 1.0 mA to IO(nom.)) | IQ | 1.1 | - | 3.6 | μA |
| Output Voltage Temperature Coefficient | Tc | -100 | - | - | ppm/°C |
| Output Noise Voltage (f = 1.0 kHz to 100 kHz) | Vn | - | - | 89 | μVrms |
Key Features
- Ultra-low quiescent current of 1.1 μA typical, making it suitable for battery-powered devices.
- Excellent line and load regulation.
- Maximum operating voltage of 12 V.
- Low output voltage options available.
- High accuracy output voltage with a tolerance of 2.5%.
- ESD protection exceeding Human Body Model 2000 V per MIL-STD-883, Method 3015.
- Stable operation with ceramic or tantalum capacitors, with a minimum output capacitor of 0.1 μF.
- Compact Thin SOT23-5 surface mount package.
Applications
The MC78LC30NTR is designed for use in handheld communication equipment, portable battery-powered devices, and other applications requiring low power consumption and high efficiency. It is particularly suitable for devices that need stable voltage regulation with minimal quiescent current.
A typical application circuit includes input and output decoupling capacitors, with recommendations for capacitor values and types to ensure stable operation and good transient response. The device can also be used in current boost circuits and adjustable voltage regulator configurations.
Q & A
- What is the typical quiescent current of the MC78LC30NTR?
The typical quiescent current is 1.1 μA.
- What is the maximum operating voltage for the MC78LC30NTR?
The maximum operating voltage is 12 V.
- What is the output voltage tolerance of the MC78LC30NTR?
The output voltage tolerance is 2.5%.
- What type of package does the MC78LC30NTR come in?
The device is housed in a Thin SOT23-5 surface mount package.
- What is the minimum output capacitor value required for the MC78LC30NTR?
The minimum output capacitor value is 0.1 μF.
- Does the MC78LC30NTR have ESD protection?
Yes, it exceeds the Human Body Model 2000 V per MIL-STD-883, Method 3015.
- What is the maximum output current for the MC78LC30NTR when Vin = 5.0 V?
The maximum output current is 80 mA.
- How is the dropout voltage measured for the MC78LC30NTR?
The dropout voltage is measured at Vout - 3% where Vout is the nominal output voltage.
- What is the output noise voltage of the MC78LC30NTR?
The output noise voltage is 89 μVrms over the frequency range of 1.0 kHz to 100 kHz.
- What are the thermal considerations for the MC78LC30NTR?
The device's maximum power dissipation is dependent on the PCB design, layout, and ambient temperature. It can dissipate up to 357 mW at 25°C if the junction temperature is kept below 125°C.
