Overview
The LP5907UVE-1.2/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 junction temperature range of –40°C to 125°C. It is particularly suited for applications where high noise performance and stability are crucial, such as in mobile phones, tablets, digital cameras, and portable medical equipment.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 2.2 to 5.5 | V |
| Output Voltage Range | 1.2 to 4.5 | V |
| Output Current | Up to 250 | mA |
| Quiescent Current (Enabled) | 12 | µA |
| Dropout Voltage (Typical) | 120 | mV |
| Output Voltage Noise | < 6.5 | µVRMS |
| PSRR at 1 kHz | 82 | dB |
| Output Voltage Tolerance | ±2% | |
| Operating Junction Temperature | –40 to 125 | °C |
| Package Type | DSBGA (YKE), X2SON, SOT-23 |
Key Features
- Low output voltage noise: < 6.5 µVRMS
- High PSRR: 82 dB at 1 kHz
- Very 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 and 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 and drones
Q & A
- What is the input voltage range of the LP5907?
The input voltage range of the LP5907 is from 2.2 V to 5.5 V.
- What is the maximum output current of the LP5907?
The LP5907 can supply up to 250 mA of output current.
- What is the typical dropout voltage of the LP5907?
The typical dropout voltage of the LP5907 is 120 mV.
- Does the LP5907 require a noise bypass capacitor?
No, the LP5907 does not require a noise bypass capacitor. It is stable with 1-µF ceramic input and output capacitors.
- 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.
- What are the key applications of the LP5907?
The LP5907 is used in mobile phones, tablets, digital cameras, portable medical equipment, and other battery-powered devices.
- How does the enable pin function on the LP5907?
The enable pin allows the device to be turned on or off. When the enable pin is high, the device is on; when it is low, the device is off and the output is automatically discharged to ground.
- What is the PSRR of the LP5907 at 1 kHz?
The PSRR of the LP5907 at 1 kHz is 82 dB.
- Does the LP5907 have thermal protection?
- Can the output capacitor be placed remotely from the LP5907?
