Overview
The LP5907SNX-2.9/NOPB is a low-noise, low-quiescent current 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 line or load transient response figures. The LP5907 can supply up to 250 mA of output current and operates within an input voltage range of 2.2 V to 5.5 V, with output voltages ranging from 1.2 V to 4.5 V in 25 mV steps.
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 |
| Quiescent Current (Enabled) | - | 12 | - | μA |
| Dropout Voltage | - | 120 | - | mV |
| Output Voltage Noise | - | < 6.5 | - | μVRMS |
| PSRR at 1 kHz | - | 82 | - | dB |
| Operating Junction Temperature | -40 | - | 125 | °C |
| Input Capacitance | 0.7 | 1 | 10 | μF |
| Output Capacitance | 0.7 | 1 | 10 | μF |
Key Features
- Stable operation with 1 μF ceramic input and output capacitors, no separate noise bypass capacitor required.
- Remote output capacitor placement capability.
- Thermal-overload and short-circuit protection.
- Low output voltage noise: < 6.5 μVRMS.
- High PSRR: 82 dB at 1 kHz.
- Output voltage tolerance: ±2%.
- Very low quiescent current (enabled): 12 μA.
- Low dropout voltage: 120 mV (typical).
- Enable pin for shutdown control with automatic output discharge.
- Operating junction temperature range: –40°C to 125°C.
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 is from 2.2 V to 5.5 V.
- What is the output voltage range of the LP5907? The output voltage range is from 1.2 V to 4.5 V in 25 mV steps.
- How much output current can the LP5907 supply? 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 is 12 μA.
- Does the LP5907 require a noise bypass capacitor? No, the LP5907 does not require a separate noise bypass capacitor.
- What is the PSRR of the LP5907 at 1 kHz? The PSRR is 82 dB at 1 kHz.
- 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? Yes, the LP5907 has thermal-overload and short-circuit protection.
- How does the enable pin function on the LP5907? The enable pin allows for shutdown control with automatic output discharge when the pin is low.
- What types of capacitors are recommended for use with the LP5907? X7R capacitors are recommended, but X5R, Y5V, and Z5U capacitors can also be used with consideration of the application conditions.
