Overview
The REG102NA-5/3K is a low-noise, low-dropout linear regulator from Texas Instruments, part of the REG102 family. This regulator features a new DMOS topology that offers significant improvements over previous designs, including a low dropout voltage of only 150mV at full load and better transient performance. It is designed to provide high output voltage accuracy and stability without the need for an output capacitor, making it ideal for use in various electronic devices.
Key Specifications
| Parameter | Value |
|---|---|
| Output Voltage | 5V (fixed), other voltages available upon request |
| Output Current | 250mA |
| Dropout Voltage | 150mV typ at 250mA |
| Ground Pin Current | 600µA at IOUT = 250mA, 10nA when not enabled |
| Output Noise | 28µVrms for VOUT = 3.3V with CNR = 0.01µF |
| Output Voltage Accuracy | ±1.5% max |
| Operating Temperature Range | -40°C to +85°C |
| Package Types | SOT23-5, SOT223-5, SO-8 |
Key Features
- Low Dropout Voltage: 150mV typ at 250mA
- No Output Capacitor Required: Stable operation without the need for an output capacitor
- Fast Transient Response: Better transient performance compared to conventional regulators
- Very Low Noise: 28µVrms for VOUT = 3.3V with CNR = 0.01µF
- High Accuracy: ±1.5% max output voltage accuracy
- Low Ground Pin Current: 600µA at IOUT = 250mA, drops to 10nA when not enabled
- Thermal and Current Protection: Internal circuitry for current limit and thermal protection
- Compact Packages: Available in SOT23-5, SOT223-5, and SO-8 packages
Applications
- Portable communication devices
- Battery-powered equipment
- Personal digital assistants
- Modems
- Bar-code scanners
- Backup power supplies
Q & A
- What is the typical dropout voltage of the REG102NA-5/3K?
The typical dropout voltage is 150mV at 250mA.
- Is an output capacitor required for stability?
No, the REG102NA-5/3K does not require an output capacitor for stability.
- What is the ground pin current when the regulator is enabled and disabled?
The ground pin current is 600µA at IOUT = 250mA and drops to 10nA when not enabled.
- What is the output noise of the REG102NA-5/3K?
The output noise is typically 28µVrms for VOUT = 3.3V with CNR = 0.01µF.
- What is the operating temperature range of the REG102NA-5/3K?
The operating temperature range is -40°C to +85°C.
- What types of packages are available for the REG102NA-5/3K?
The regulator is available in SOT23-5, SOT223-5, and SO-8 packages.
- Does the REG102NA-5/3K have built-in protection features?
- What are some common applications for the REG102NA-5/3K?
- How accurate is the output voltage of the REG102NA-5/3K?
- Can the output voltage of the REG102NA-5/3K be adjusted?
