Overview
The LP5907UVE-4.5/NOPB is a low-noise, low-quiescent current Linear Voltage Regulator (LDO) produced by Texas Instruments. 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 is available with fixed output voltages ranging from 1.2V to 4.5V in 25mV steps. This specific model, LP5907UVE-4.5/NOPB, provides a regulated output voltage of 4.5V.
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 1kHz | 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 with output voltage noise less than 6.5 μVRMS.
- High power-supply rejection ratio (PSRR) of 82 dB at 1 kHz.
- Very 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; no noise bypass capacitor required.
- Remote output capacitor placement capability.
- Thermal-overload and short-circuit protection.
- Operating junction temperature range of -40°C to 125°C.
- Available in various packages including DSBGA, SOT-23, and X2SON.
Applications
- Smartphones and tablets.
- Digital still cameras and audio devices.
- Communications equipment.
- 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 is the typical quiescent current of the LP5907 when enabled?
The typical quiescent current when enabled is 12 μA.
- 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 PSRR of the LP5907 at 1 kHz?
The PSRR of the LP5907 at 1 kHz is 82 dB.
- 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 capacitors are recommended for use with the LP5907?
X7R capacitors are recommended, but X5R, Y5V, and Z5U capacitors can also be used with proper consideration of the application and conditions.
- Does the LP5907 have thermal-overload and short-circuit protection?
- What are some common applications of the LP5907?
- What is the typical dropout voltage of the LP5907?
