Overview
The REG103GA-5G4 is a low-noise, low-dropout linear voltage regulator from Texas Instruments, part of the REG103 family. It features a new DMOS topology that offers significant improvements over previous designs, including an ultra-low dropout voltage of 115mV typical at 500mA and 3.3V output. This regulator is designed for high accuracy and efficiency, making it ideal for use in various electronic devices that require stable and reliable power supply.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Output Voltage | - | 5 | 5 | 5 | V |
| Dropout Voltage | IOUT = 500mA, VOUT = 3.3V | - | 115mV | - | mV |
| Ground Pin Current | IOUT = 500mA | - | 1mA | - | mA |
| Ground Pin Current (Not Enabled) | - | - | 0.5µA | - | µA |
| Output Noise | VOUT = 3.3V, CNR = 0.01µF | - | 33µVrms | - | µVrms |
| Operating Temperature Range | - | -40°C | - | +85°C | °C |
| Package | - | - | SOT-223-6 | - | - |
Key Features
- NEW DMOS Topology: Ultra-low dropout voltage and better transient performance.
- No Output Capacitor Required for Stability: Unlike conventional low-dropout regulators.
- Fast Transient Response: Ensures quick recovery from load changes.
- Very Low Noise: Typically 33µVrms for VOUT = 3.3V with CNR = 0.01µF.
- High Accuracy: ±2% maximum output voltage accuracy.
- High Efficiency: Low ground pin current of 1mA at IOUT = 500mA and 0.5µA in not enabled mode.
- Foldback Current Limit and Thermal Protection: Protects the load and the chip from damage.
- Output Voltage Error Indicator: Available in the SO-8 package.
- Small Surface-Mount Packages: Available in SOT223-5, DDPAK-5, and SO-8.
Applications
- Portable Communication Devices: Ideal for use in mobile phones, tablets, and other portable communication equipment.
- Battery-Powered Equipment: Suitable for devices that require efficient power management.
- Personal Digital Assistants: Used in PDAs and other handheld devices.
- Modems and Bar-Code Scanners: Provides stable power supply for these devices.
- Backup Power Supplies: Can be used in backup power systems for various applications.
Q & A
- What is the typical dropout voltage of the REG103GA-5G4?
The typical dropout voltage is 115mV at 500mA and 3.3V output. - Is an output capacitor required for stability?
No, an output capacitor is not required for stability. - What is the typical ground pin current at full load?
The typical ground pin current is 1mA at IOUT = 500mA. - What is the output noise level of the REG103GA-5G4?
The output noise level is typically 33µVrms for VOUT = 3.3V with CNR = 0.01µF. - What are the available package options for the REG103GA-5G4?
The available packages are SOT223-5, DDPAK-5, and SO-8. - What is the operating temperature range of the REG103GA-5G4?
The operating temperature range is from -40°C to +85°C. - Does the REG103GA-5G4 have thermal protection?
Yes, it has thermal protection circuitry to prevent damage from excessive temperature. - What is the maximum output current of the REG103GA-5G4?
The maximum output current is 500mA. - Is there an output voltage error indicator available?
Yes, an output voltage error indicator is available in the SO-8 package. - What are some common applications of the REG103GA-5G4?
Common applications include portable communication devices, battery-powered equipment, personal digital assistants, modems, bar-code scanners, and backup power supplies.
