Overview
The LP5907YKGR-2.8, produced by Texas Instruments, is a low-noise, low-dropout linear voltage regulator (LDO) designed to meet the stringent requirements of RF and analog circuits. This device can supply up to 250mA of output current and is characterized by its ultra-low noise, high power supply rejection ratio (PSRR), and low quiescent current. The LP5907 is available in various packages, including the DSBGA, SOT-23, and X2SON, making it versatile for different application needs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 2.2V to 5.5V | V |
| Output Voltage Range | 1.2V to 4.5V (fixed 2.8V for LP5907YKGR-2.8) | V |
| Output Current | Up to 250mA | mA |
| Input Capacitance | 1µF (minimum) | F |
| Output Capacitance | 1µF (minimum), up to 10µF | F |
| Output Voltage Noise | < 6.5µVRMS | µVRMS |
| PSRR at 1kHz | 82dB | dB |
| Output Voltage Tolerance | ±2% | % |
| Quiescent Current (Enabled) | 12µA | µA |
| Dropout Voltage (Typical) | 120mV | mV |
| Operating Junction Temperature | –40°C to 125°C | °C |
| Package | DSBGA, SOT-23, X2SON |
Key Features
- Ultra-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 noise bypass capacitor required
- Remote output capacitor placement
- Thermal-overload and short-circuit protection
- Enable pin for on/off control with automatic output discharge
- Operating junction temperature range: –40°C to 125°C
Applications
- Smartphones 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
- Factory automation and communications equipment
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 the LP5907?
The LP5907 is stable with 1µF ceramic input and output capacitors. X7R capacitors are recommended, but X5R, Y5V, and Z5U capacitors can also be used with proper application considerations.
- Does the LP5907 require a noise bypass capacitor?
No, the LP5907 does not require a separate noise bypass capacitor.
- What is the typical dropout voltage of the LP5907?
The typical dropout voltage of the LP5907 is 120mV.
- How does the enable pin function on the LP5907?
The enable pin (EN) allows the device to be turned on or off. A voltage above the VIH threshold turns the device on, while a voltage below the VIL threshold turns it off and activates the automatic output discharge.
- 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 kind of protection does the LP5907 offer?
The LP5907 offers thermal-overload and short-circuit protection.
- Can the LP5907 be used in RF and analog circuits?
Yes, the LP5907 is designed to meet the requirements of RF and analog circuits, providing low noise, high PSRR, and low quiescent current.
- What are some common applications of the LP5907?
The LP5907 is commonly used in smartphones, tablets, digital cameras, portable medical equipment, smart meters, and other battery-powered devices.
