Overview
The LP5907SNX-2.85/NOPB is a 250mA, ultra-low-noise, low-IQ Linear Voltage Regulator (LDO) produced by 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 stable with 1µF ceramic input and output capacitors and does not require a separate noise bypass capacitor. It features remote output capacitor placement, thermal-overload and short-circuit protection, and operates over a junction temperature range of –40°C to 125°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 2.2V to 5.5V | V |
| Output Voltage Range | 1.2V to 4.5V | V |
| Output Current | Up to 250mA | mA |
| 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 |
| Input Capacitance | 1µF (Ceramic) | µF |
| Output Capacitance | 1µF (Ceramic) | µF |
Key Features
- Low output voltage noise: < 6.5µVRMS
- High PSRR: 82dB at 1kHz
- Very low quiescent current: 12µA (enabled)
- Low dropout voltage: 120mV (typical)
- Stable with 1µF ceramic input and output capacitors
- No separate noise bypass capacitor required
- Remote output capacitor placement possible
- Thermal-overload and short-circuit protection
- Operating junction temperature: –40°C to 125°C
- Automatic output discharge with internal 230Ω pulldown resistance when disabled
Applications
- Smartphones
- Tablets
- Communications equipment
- Digital still cameras
- Factory automation
Q & A
- What is the input voltage range of the LP5907?
The input voltage range of the LP5907 is 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 is the typical dropout voltage of the LP5907?
The typical dropout voltage of the LP5907 is 120mV.
- Does the LP5907 require a separate noise bypass capacitor?
No, the LP5907 does not require a separate noise bypass capacitor. It is stable with 1µF ceramic input and output capacitors.
- What is the operating junction temperature range of the LP5907?
The operating junction temperature range of the LP5907 is –40°C to 125°C.
- What are the key applications of the LP5907?
The LP5907 is used in smartphones, tablets, communications equipment, digital still cameras, and factory automation.
- How does the LP5907 handle thermal overload and short circuits?
The LP5907 features thermal-overload and short-circuit protection.
- What is the quiescent current of the LP5907 when enabled?
The quiescent current of the LP5907 when enabled is 12µA.
- Can the output capacitor be placed remotely from the LP5907?
Yes, the LP5907 allows for remote output capacitor placement.
- How does the LP5907 discharge the output when disabled?
The LP5907 employs an internal 230Ω pulldown resistance to discharge the output when the enable pin is low and the device is disabled.
