Overview
The LP5907MFX-1.8/NOPB, produced by Texas Instruments, is a low-noise, low-quiescent current (IQ) Linear Voltage Regulator (LDO). 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 a stable 1µF ceramic input and output capacitor, eliminating the need for a separate noise bypass capacitor. It is available in various packages, including DSBGA, SOT-23, and X2SON, making it versatile for different application needs.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | 2.2 | 5.5 | V | |
| Output Voltage Range | 1.2 | 4.5 | V | |
| Output Voltage Tolerance | -2 | 2 | % | |
| Maximum 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 | µF | |
| Output Capacitance | 0.7 | 1 | 10 | µF |
Key Features
- Low-noise operation: < 6.5µVRMS output voltage noise.
- 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.
- Operating junction temperature range: -40°C to 125°C.
- Available in DSBGA, SOT-23, and X2SON packages.
Applications
- Smartphones and tablets.
- 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.
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?
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 1kHz?
The PSRR at 1kHz is 82dB.
- What are the operating junction temperature limits of the LP5907?
The operating junction temperature range is from -40°C to 125°C.
- What types of protection does the LP5907 offer?
The LP5907 offers thermal-overload and short-circuit protection.
- What are some common applications of the LP5907?
Common applications include smartphones, tablets, digital cameras, portable medical equipment, and RF power supplies.
