Overview
The LP5907UVE-3.1/NOPB is a 250-mA, ultra-low-noise, low-IQ linear voltage regulator from Texas Instruments. This device is designed to meet the stringent requirements of RF and analog circuits, offering low noise, high power-supply rejection ratio (PSRR), low quiescent current, and low line or load transient response figures. The LP5907 is available in various packages, including DSBGA, X2SON, and SOT-23, and operates over an extended temperature range of –40°C to 125°C.
The device is notable for its class-leading noise performance without the need for a separate noise bypass capacitor and the ability for remote output capacitor placement. It is stable with 1-µF ceramic input and output capacitors and provides fixed output voltages from 1.2V to 4.5V in 25-mV steps.
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 | ||
| Quiescent Current (Enabled) | 12 | µA | ||
| Dropout Voltage (Typical) | 120 | mV | ||
| Output Voltage Noise (RMS) | < 6.5 | µV | ||
| PSRR at 1 kHz | 82 | dB | ||
| Operating Junction Temperature | -40 | 125 | °C | |
| Output Voltage Tolerance | ±2% |
Key Features
- Low noise: < 6.5 µVRMS output voltage noise
- High PSRR: 82 dB at 1 kHz
- Low quiescent current: 12 µA (enabled)
- Low dropout voltage: 120 mV (typical)
- Stable with 1-µF ceramic input and output capacitors
- No noise bypass capacitor required
- Remote output capacitor placement
- Thermal-overload and short-circuit protection
- Enable pin for on/off control with automatic output discharge
Applications
- Mobile Phones, Tablets
- Digital 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
- Drones
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 250 mA of output current.
- What is the typical quiescent current of the LP5907 when enabled?
The typical quiescent current when enabled is 12 µA.
- Does the LP5907 require a noise bypass capacitor?
No, the LP5907 does not require a noise bypass capacitor.
- What is the operating junction temperature range of the LP5907?
The operating junction temperature range is from –40°C to 125°C.
- What is the PSRR of the LP5907 at 1 kHz?
The PSRR at 1 kHz is 82 dB.
- Does the LP5907 have thermal-overload and short-circuit protection?
- How can the LP5907 be turned on or off?
The LP5907 can be turned on or off using the enable (EN) pin. A voltage above the VIH threshold turns the device on, while a voltage below the VIL threshold turns it off).
- What is the typical dropout voltage of the LP5907?
The typical dropout voltage is 120 mV).
- Can the output capacitor be placed remotely from the LP5907?
