Overview
The LP5907MFX-1.2/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 class-leading noise performance, high power supply rejection ratio (PSRR), and low quiescent current. The LP5907 can supply up to 250 mA of output current and is available with fixed output voltages ranging from 1.2 V to 4.5 V in 25 mV steps. This specific model, LP5907MFX-1.2/NOPB, is configured to provide a fixed output voltage of 1.2 V.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage Range | 2.2 | - | 5.5 | V |
| Output Voltage Range | 1.2 | - | 4.5 | V |
| Output Current | - | - | 250 | mA |
| Output Voltage Noise | - | < 6.5 | - | µVRMS |
| PSRR at 1 kHz | - | 82 | - | dB |
| Output Voltage Tolerance | - | ±2% | - | % |
| Quiescent Current (Enabled) | - | 12 | - | µA |
| Dropout Voltage (Typical) | - | 120 | - | mV |
| Operating Junction Temperature | -40 | - | 125 | °C |
| Input Capacitance | 0.7 | 1 | 10 | µF |
| Output Capacitance | 0.7 | 1 | 10 | µF |
Key Features
- Low output voltage noise: < 6.5 µVRMS
- High PSRR: 82 dB at 1 kHz
- Low quiescent current: 12 µA (enabled)
- Low dropout voltage: 120 mV (typical)
- Stable with 1-µF 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 output control with automatic output discharge in shutdown mode
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
Q & A
- What is the input voltage range of the LP5907?
The input voltage range of the LP5907 is from 2.2 V to 5.5 V.
- What is the maximum output current of the LP5907?
The LP5907 can supply up to 250 mA of output current.
- What is the typical quiescent current of the LP5907 when enabled?
The typical quiescent current when enabled is 12 µA.
- Does the LP5907 require a noise bypass capacitor?
No, the LP5907 does not require a noise bypass capacitor.
- What is the PSRR of the LP5907 at 1 kHz?
The PSRR at 1 kHz is 82 dB.
- What is the operating junction temperature range of the LP5907?
The operating junction temperature range is from -40°C to 125°C.
- Does the LP5907 have thermal-overload and short-circuit protection?
- Can the output capacitor be placed remotely from the LP5907?
- What is the typical dropout voltage of the LP5907?
The typical dropout voltage is 120 mV.
- How does the enable pin function on the LP5907?
The enable pin controls the output voltage, and when the device is in shutdown mode, an automatic output discharge is activated.
