Overview
The LP5907SNX-1.8/NOPB is a low-noise, low-quiescent current Linear Low-Dropout (LDO) regulator produced by Texas Instruments. This device is designed to meet the stringent requirements of RF and analog circuits, offering high performance in noise reduction, power supply rejection ratio (PSRR), and low dropout voltage. The LP5907 can supply up to 250mA of output current and is available with fixed output voltages, including the 1.8V option in this specific model.
The device features thermal-overload and short-circuit protection, ensuring reliable operation under various conditions. It is stable with 1µF ceramic input and output capacitors and does not require a separate noise bypass capacitor. The LP5907 is suitable for a wide range of applications, including smartphones, tablets, communications equipment, and digital still cameras.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | 2.2 | 5.5 | V | |
| Output Voltage Range | 1.2 | 4.5 | V | |
| Output Voltage Tolerance | -2 | 2 | % | |
| Maximum Output Current | 250 | mA | ||
| Quiescent Current (Enabled) | 12 | 25 | μA | |
| Dropout Voltage (Typical) | 120 | mV | ||
| PSRR at 1kHz | 82 | dB | ||
| Output Noise Voltage (Typical) | 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)
- Stable with 1µF 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
Applications
- Smartphones
- Tablets
- Communications equipment
- Digital still cameras
- Factory automation
Q & A
- What is the input voltage range of the LP5907?
The input voltage range of the LP5907 is from 2.2V to 5.5V.
- What is the maximum output current of the LP5907?
The maximum output current of the LP5907 is 250mA.
- What is the typical quiescent current of the LP5907 when enabled?
The typical quiescent current of the LP5907 when enabled is 12μA.
- What is the dropout voltage of the LP5907?
The typical dropout voltage of the LP5907 is 120mV.
- Does the LP5907 require a separate 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 of the LP5907 at 1kHz is 82dB.
- 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?
- 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 proper consideration of the application conditions.
- What are some common applications of the LP5907?
The LP5907 is commonly used in smartphones, tablets, communications equipment, digital still cameras, and factory automation.
