Overview
The LP5907UVX-1.8/NOPB is a low-noise, low-dropout (LDO) linear voltage 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 quiescent current. 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 regulator is stable with 1µF ceramic input and output capacitors and does not require a separate noise bypass capacitor. It features remote output capacitor placement, thermal-overload and short-circuit protection, and operates over a junction temperature range of –40°C to 125°C.
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% | % | ||
| Output Current | 0 | 250 | mA | |
| Quiescent Current (IQ) | 12 | µA | ||
| Dropout Voltage | 120 | mV | ||
| PSRR at 1kHz | 82 | dB | ||
| Output Noise (RMS) | < 6.5 | µVRMS | ||
| Junction Temperature Range | –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
- Low line or load transient response
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 type 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 and conditions.
- Does the LP5907 require a separate noise bypass capacitor?
No, the LP5907 does not require a separate noise bypass capacitor.
- What is the typical quiescent current of the LP5907?
The typical quiescent current of the LP5907 is 12µA when enabled.
- What is the PSRR of the LP5907 at 1kHz?
The PSRR of the LP5907 at 1kHz is 82dB.
- What is the output voltage noise of the LP5907?
The output voltage noise of the LP5907 is less than 6.5µVRMS.
- What are the thermal protection features of the LP5907?
The LP5907 features thermal-overload and short-circuit protection.
- What is the junction temperature range of the LP5907?
The junction temperature range of the LP5907 is from –40°C to 125°C.
- What are some common applications of the LP5907?
The LP5907 is commonly used in smartphones, tablets, communications equipment, digital still cameras, and factory automation.
