Overview
The LP5907SNX-2.7/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. It operates with a stable 1 µF ceramic input and output capacitor, eliminating the need for a separate noise bypass capacitor. The regulator features thermal-overload and short-circuit protection, ensuring reliable operation in various applications.
Key Specifications
| Parameter | Min | Typ | Max | 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 | 2 | % | |
| Quiescent Current (Enabled) | 12 | µA | ||
| Dropout Voltage (Typical) | 120 | mV | ||
| Operating Junction Temperature | -40 | 125 | °C | |
| Input Capacitance | 0.7 | 1 | µF | |
| Output Capacitance | 0.7 | 1 | 10 | µF |
Key Features
- Stable operation with 1 µF ceramic input and output capacitors, no noise bypass capacitor required.
- Remote output capacitor placement.
- 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 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.
- Does the LP5907 require a noise bypass capacitor?
No, the LP5907 does not require a separate noise bypass capacitor.
- What is the typical dropout voltage of the LP5907?
The typical dropout voltage of the LP5907 is 120 mV.
- What is the PSRR of the LP5907 at 1 kHz?
The PSRR of the LP5907 at 1 kHz is 82 dB.
- What is the quiescent current of the LP5907 when enabled?
The quiescent current of the LP5907 when enabled is 12 µA.
- 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.
- Does the LP5907 have thermal-overload and short-circuit protection?
Yes, the LP5907 features thermal-overload and short-circuit protection.
- How can the LP5907 be controlled for shutdown?
The LP5907 can be controlled for shutdown using the enable (EN) pin, which activates an automatic output discharge when the device is disabled.
- 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 and conditions.
