Overview
The LP5907SNX-2.5/NOPB is a low-noise, low-dropout linear voltage regulator (LDO) produced by Texas Instruments. This device is designed to supply up to 250mA of output current and is optimized for use in RF and analog circuits. It features low output voltage noise, high power-supply rejection ratio (PSRR), and low quiescent current, making it suitable for a variety of applications requiring stable and noise-free power supply.
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 Tolerance | -2 | 2 | % | |
| Quiescent Current (Enabled) | 12 | 25 | μA | |
| Dropout Voltage (IOUT = 250mA) | 120 | 200 | mV | |
| PSRR at 1kHz | 82 | dB | ||
| Output Noise Voltage (10Hz to 100kHz) | 6.5 | μVRMS | ||
| Operating Junction Temperature | -40 | 125 | °C | |
| Thermal Shutdown Temperature | 160 | °C |
Key Features
- Low output voltage noise: < 6.5μVRMS
- High PSRR: 82dB at 1kHz
- Low quiescent current: 12μA (enabled)
- Low dropout voltage: 120mV (typical at IOUT = 250mA)
- Stable with 1μF ceramic input and output capacitors; no noise bypass capacitor required
- Remote output capacitor placement
- Thermal-overload and short-circuit protection
- Enable pin for power management
Applications
- Smartphones
- Tablets
- Communications equipment
- Digital still cameras
- Factory automation
Q & A
- What is the maximum output current of the LP5907?
The LP5907 can supply up to 250mA of output current. - What is the input voltage range for the LP5907?
The input voltage range is from 2.2V to 5.5V. - What is the typical dropout voltage for the LP5907 at 250mA output current?
The typical dropout voltage is 120mV. - 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 1kHz?
The PSRR at 1kHz is 82dB. - What are the recommended capacitors for input and output stability?
The device is stable with 1μF ceramic input and output capacitors. - Does the LP5907 have thermal protection?
Yes, it has thermal-overload and short-circuit protection. - What is the operating junction temperature range for the LP5907?
The operating junction temperature range is from -40°C to 125°C. - Can the LP5907 be used in RF and analog circuits?
Yes, it is optimized for use in RF and analog circuits due to its low noise and high PSRR. - How does the enable pin function on the LP5907?
The enable pin allows for power management by enabling or disabling the output voltage.
