Overview
The LP5907MFX-3.1/NOPB is a low-noise, low-dropout linear voltage regulator (LDO) produced by Texas Instruments. This device is designed to meet the stringent requirements of RF and analog circuits, offering exceptional noise performance, high power supply rejection ratio (PSRR), and low quiescent current. The LP5907 can supply up to 250mA of output current and is available with fixed output voltages ranging from 1.2V to 4.5V in 25mV steps.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 2.2V to 5.5V | V |
| Output Voltage Range | 1.2V to 4.5V | V |
| Output Current | Up to 250mA | mA |
| Output Voltage Noise | < 6.5µVRMS | µVRMS |
| PSRR at 1kHz | 82dB | dB |
| Output Voltage Tolerance | ±2% | % |
| Quiescent Current (Enabled) | 12µA | µA |
| Dropout Voltage (Typical) | 120mV | mV |
| Operating Junction Temperature | –40°C to 125°C | °C |
| Input Capacitance | 1µF (Ceramic) | µF |
| Output Capacitance | 1µF (Ceramic) | µF |
| Thermal-Overload and Short-Circuit Protection | Yes |
Key Features
- Low output voltage noise: < 6.5µVRMS
- High PSRR: 82dB at 1kHz
- Very low quiescent current: 12µA (enabled)
- Low dropout voltage: 120mV (typical)
- Stable with 1µF ceramic input and output capacitors; no noise bypass capacitor required
- Remote output capacitor placement
- Thermal-overload and short-circuit protection
- Operating junction temperature range: –40°C to 125°C
- Enable pin for on/off control with automatic output discharge
Applications
- Smartphones and tablets
- Digital cameras and audio devices
- Portable and battery-powered equipment
- Portable medical equipment
- Smart meters and field transmitters
- RF, PLL, VCO, and clock power supplies
- IP cameras and drones
- Communications equipment and factory automation
Q & A
- What is the input voltage range of the LP5907?
The input voltage range of the LP5907 is from 2.2V to 5.5V.
- What is the maximum output current of the LP5907?
The LP5907 can supply up to 250mA of output current.
- What is the typical dropout voltage of the LP5907?
The typical dropout voltage of the LP5907 is 120mV.
- Does the LP5907 require a noise bypass capacitor?
No, the LP5907 does not require a separate noise bypass capacitor.
- What is the operating junction temperature range of the LP5907?
The operating junction temperature range of the LP5907 is –40°C to 125°C.
- What type of capacitors are recommended for the LP5907?
X7R ceramic capacitors are recommended, but X5R, Y5V, and Z5U capacitors can also be used with proper consideration of the application and conditions.
- Does the LP5907 have thermal-overload and short-circuit protection?
Yes, the LP5907 includes thermal-overload and short-circuit protection features.
- How is the enable pin used on the LP5907?
The enable pin (EN) is used to turn the device on or off. A voltage above the VIH threshold enables the device, while a voltage below the VIL threshold disables it and activates the automatic output discharge.
- What is the typical quiescent current of the LP5907 when enabled?
The typical quiescent current of the LP5907 when enabled is 12µA.
- Can the LP5907 be used in RF and analog circuits?
Yes, the LP5907 is designed to meet the requirements of RF and analog circuits, providing low noise, high PSRR, and low quiescent current.
