Overview
The LP5907MFX-3.2/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 exceptional 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. The specific model, LP5907MFX-3.2/NOPB, provides a fixed output voltage of 3.2 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 |
| ESR of Input/Output Capacitors | 5 | - | 500 | mΩ |
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 separate noise bypass capacitor required
- Remote output capacitor placement
- Thermal-overload and short-circuit protection
- Operating junction temperature range: –40°C to 125°C
- Output voltage tolerance: ±2%
- Available in industry-standard packages such as DSBGA, X2SON, and SOT-23
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 2.2 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 dropout voltage of the LP5907?
The typical dropout voltage of the LP5907 is 120 mV.
- 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 from –40°C to 125°C.
- What types of capacitors are recommended for the LP5907?
X7R capacitors are recommended, but X5R, Y5V, and Z5U capacitors can also be used with proper consideration of the application conditions.
- What is the PSRR of the LP5907 at 1 kHz?
The PSRR of the LP5907 at 1 kHz is 82 dB.
- Does the LP5907 have thermal-overload and short-circuit protection?
- What are some common applications of the LP5907?
The LP5907 is commonly used in smartphones, tablets, digital cameras, portable medical equipment, and RF power supplies.
- Can the output capacitor be placed remotely from the LP5907?
