Overview
The LP5907MFX-2.7/NOPB from Texas Instruments is a 250-mA, ultra-low-noise, low-IQ linear low-dropout (LDO) voltage regulator. 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 the SOT-23-5 package, and operates over an input voltage range of 2.2 V to 5.5 V, with fixed output voltages ranging from 1.2 V to 4.5 V in 25-mV steps.
Key Specifications
| Parameter | Description |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | LP5907MFX-2.7/NOPB |
| Package | SOT-23-5 |
| Input Voltage Range | 2.2 V to 5.5 V |
| Output Voltage Range | 1.2 V to 4.5 V (fixed output voltage of 2.7 V for this model) |
| Output Current | Up to 250 mA |
| Output Voltage Noise | < 6.5 µVRMS |
| PSRR | 82 dB at 1 kHz |
| Output Voltage Tolerance | ±2% |
| Quiescent Current (Enabled) | 12 µA |
| Dropout Voltage | 120 mV (typical) |
| Operating Junction Temperature | –40°C to 125°C |
| Thermal Protection | Thermal shutdown at approximately 160°C |
Key Features
- Ultra-low noise performance without the need for a noise bypass capacitor
- High PSRR of 82 dB at 1 kHz
- Low quiescent current of 12 µA when enabled
- Low dropout voltage of 120 mV (typical)
- Stable operation with 1-µF ceramic input and output capacitors
- Remote output capacitor placement up to 10 cm away from the device
- Thermal-overload and short-circuit protection
- Enable pin for on/off control with automatic output discharge when disabled
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 LP5907MFX-2.7/NOPB?
The input voltage range is from 2.2 V to 5.5 V.
- What is the maximum output current of the LP5907MFX-2.7/NOPB?
The maximum output current is up to 250 mA.
- What is the typical dropout voltage of the LP5907MFX-2.7/NOPB?
The typical dropout voltage is 120 mV.
- Does the LP5907MFX-2.7/NOPB require a noise bypass capacitor?
No, it does not require a separate noise bypass capacitor.
- What is the operating junction temperature range of the LP5907MFX-2.7/NOPB?
The operating junction temperature range is from –40°C to 125°C.
- What is the PSRR of the LP5907MFX-2.7/NOPB at 1 kHz?
The PSRR is 82 dB at 1 kHz.
- Can the output capacitor be placed remotely from the LP5907MFX-2.7/NOPB?
- Does the LP5907MFX-2.7/NOPB have thermal protection?
- How does the enable pin function on the LP5907MFX-2.7/NOPB?
The enable pin allows the device to be turned on or off. When the EN pin is low, the regulator output is off, and an internal pulldown resistor discharges the output capacitor.
- What are some typical applications of the LP5907MFX-2.7/NOPB?
Typical applications include mobile phones, tablets, digital cameras, portable medical equipment, and RF power supplies.
