Overview
The LP5907UVX-3.1/NOPB is a low-noise, low-quiescent current Linear Voltage Regulator (LDO) produced by Texas Instruments. This device is designed to meet the stringent requirements of RF and analog circuits, offering class-leading noise performance, high Power Supply Rejection Ratio (PSRR), and low line or load transient response figures. The LP5907 can supply up to 250mA of output current and operates with an input voltage range of 2.2V to 5.5V, providing fixed output voltages from 1.2V to 4.5V in 25mV steps.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage Range | 2.2 | 5.5 | V | |
| Output Voltage Range | 1.2 | 4.5 | V | |
| Output Current | 250 | mA | ||
| Quiescent Current (Enabled) | 12 | μA | ||
| Dropout Voltage (Typical) | 120 | mV | ||
| Output Voltage Noise (RMS) | < 6.5 | μVRMS | ||
| PSRR at 1 kHz | 82 | dB | ||
| Operating Junction Temperature | -40 | 125 | °C | |
| Input Capacitance | 0.7 | 1 | 10 | μF |
| Output Capacitance | 0.7 | 1 | 10 | μF |
Key Features
- Stable operation with 1-µF ceramic input and output capacitors, no separate noise bypass capacitor required.
- Remote output capacitor placement capability.
- Thermal-overload and short-circuit protection.
- Low output voltage noise: < 6.5µVRMS.
- High PSRR: 82dB at 1kHz.
- Output voltage tolerance: ±2%.
- Very low quiescent current (enabled): 12µA.
- Low dropout voltage: 120mV (typical).
- Enable pin for on/off control with automatic output discharge when disabled.
- No-load stability and low line or load transient response.
Applications
- Smartphones and tablets.
- Communications equipment.
- Digital still 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.
- 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 LP5907 can supply up to 250mA of output current.
- 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.
- Does the LP5907 require a noise bypass capacitor?
No, the LP5907 does not require a separate noise bypass capacitor.
- What is the typical quiescent current of the LP5907 when enabled?
The typical quiescent current when enabled is 12µA.
- What is the dropout voltage of the LP5907?
The typical dropout voltage is 120mV.
- What is the PSRR of the LP5907 at 1 kHz?
The PSRR at 1 kHz is 82dB.
- Does the LP5907 have thermal-overload and short-circuit protection?
- How does the enable pin function on the LP5907?
The enable pin allows for on/off control of the device, with automatic output discharge when the device is disabled.
- What is the operating junction temperature range of the LP5907?
The operating junction temperature range is from -40°C to 125°C.
