Overview
The LP5907SNX-1.2/NOPB is a low-noise, low-quiescent current linear voltage regulator (LDO) produced by Texas Instruments. This device is designed to supply up to 250mA of output current and is particularly suited for applications requiring low noise and high power-supply rejection ratio (PSRR). The LP5907 is available with fixed output voltages ranging from 1.2V to 4.5V in 25mV steps, making it versatile for various electronic systems. It features thermal-overload and short-circuit protection, ensuring reliable operation under adverse conditions.
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 | 0 | 250 | mA | |
| Quiescent Current (Enabled) | 12 | 25 | μA | |
| Dropout Voltage (IOUT = 250mA) | 120 | 200 | mV | |
| PSRR at 1kHz | 82 | dB | ||
| Output Noise Voltage (BW = 10Hz to 100kHz) | 6.5 | μVRMS | ||
| Junction Temperature Range | -40 | 125 | °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 250mA output current
- No noise bypass capacitor required
- Remote output capacitor placement
- Thermal-overload and short-circuit protection
- Stable with 1-µF ceramic input and output capacitors
Applications
- Smartphones
- Tablets
- Communications equipment
- Digital still cameras
- Factory automation
Q & A
- What is the maximum output current of the LP5907?
The maximum output current of the LP5907 is 250mA.
- What is the input voltage range for the LP5907?
The input voltage range for the LP5907 is from 2.2V to 5.5V.
- What is the typical quiescent current of the LP5907 when enabled?
The typical quiescent current of the LP5907 when enabled is 12μA.
- Does the LP5907 require a noise bypass capacitor?
No, the LP5907 does not require a noise bypass capacitor.
- What is the PSRR of the LP5907 at 1kHz?
The PSRR of the LP5907 at 1kHz is 82dB.
- What are the thermal protection features of the LP5907?
The LP5907 features thermal-overload and short-circuit protection.
- What is the junction temperature range for the LP5907?
The junction temperature range for the LP5907 is from -40°C to 125°C.
- Can the LP5907 be used in applications requiring remote output capacitor placement?
- What type 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.
- How does the LP5907 handle short-circuit conditions?
The LP5907 has an internal short-circuit current limit to protect against short-circuit conditions.
