Overview
The LP5907UVE-3.3/NOPB is a low-noise, low-dropout linear voltage regulator (LDO) produced by Texas Instruments. This device is designed to supply up to 250 mA of output current and is optimized for use in RF and analog circuits. It features low output voltage noise, high power supply rejection ratio (PSRR), and low quiescent current, making it suitable for a variety of applications requiring stable and noise-free power supply.
The LP5907 is available in several package options, including DSBGA, SOT-23, and X2SON, and can operate over a wide temperature range from –40°C to 125°C. It is stable with 1 µF ceramic input and output capacitors and does not require a separate noise bypass capacitor. The device also includes thermal-overload and short-circuit protection, ensuring reliable operation under various conditions.
Key Specifications
| Parameter | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Input Voltage Range | TA = 25°C | 2.2 | 5.5 | V | |
| Output Voltage Range | 1.2 | 4.5 | V | ||
| Output Voltage Tolerance | VIN = (VOUT(NOM) + 1V) to 5.5V, IOUT = 1mA to 250mA | –2 | 2 | % | |
| Quiescent Current (Enabled) | VEN = 1.2V, IOUT = 1mA | 12 | µA | ||
| Dropout Voltage | 120 | mV | |||
| Output Voltage Noise | BW = 10Hz to 100kHz, IOUT = 1mA | 6.5 | µVRMS | ||
| PSRR at 1 kHz | 82 | dB | |||
| Maximum Output Current | 250 | mA | |||
| Operating Junction Temperature | –40 | 125 | °C |
Key Features
- Low Noise and High PSRR: The LP5907 offers low output voltage noise (< 6.5 µVRMS) and high PSRR (82 dB at 1 kHz), making it ideal for RF and analog circuits.
- Low Quiescent Current: The device has a very low quiescent current of 12 µA when enabled.
- Low Dropout Voltage: Typical dropout voltage is 120 mV.
- No Noise Bypass Capacitor Required: Stable operation with 1 µF ceramic input and output capacitors without the need for a separate noise bypass capacitor.
- Remote Output Capacitor Placement: The output capacitor can be placed up to 10 cm away from the LDO.
- Thermal-Overload and Short-Circuit Protection: Includes thermal shutdown and short-circuit protection for reliable operation.
- Output Automatic Discharge: An internal 230 Ω pulldown resistance discharges the output when the device is disabled.
Applications
- Mobile Phones and Tablets: Ideal for powering RF, PLL, VCO, and clock circuits.
- Digital Cameras and Audio Devices: Suitable for applications requiring low noise and stable power supply.
- Portable and Battery-Powered Equipment: Low quiescent current and low dropout voltage make it efficient for battery-powered devices.
- Portable Medical Equipment: Reliable and stable power supply for medical devices.
- Smart Meters and Field Transmitters: Used in various industrial and IoT applications.
- IP Cameras and Drones: Provides stable power for imaging and communication systems.
Q & A
- What is the input voltage range of the LP5907?
The input voltage range of the LP5907 is from 2.2 V to 5.5 V.
- What is the output voltage range of the LP5907?
The output voltage range of the LP5907 is from 1.2 V to 4.5 V in 25 mV steps.
- What is the maximum output current of the LP5907?
The maximum output current of the LP5907 is 250 mA.
- Does the LP5907 require a noise bypass capacitor?
No, the LP5907 does not require a separate noise bypass capacitor; it is stable with 1 µF ceramic input and output capacitors.
- What is the quiescent current of the LP5907 when enabled?
The quiescent current of the LP5907 when enabled is typically 12 µA.
- What is the typical dropout voltage of the LP5907?
The typical dropout voltage of the LP5907 is 120 mV.
- Does the LP5907 have thermal protection?
Yes, the LP5907 includes thermal-overload protection that disables the output when the junction temperature rises to approximately 160°C.
- Can the output capacitor be placed remotely from the LP5907?
Yes, the output capacitor can be placed up to 10 cm away from the LP5907.
- 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.
- How does the LP5907 handle output discharge when disabled?
The LP5907 employs an internal 230 Ω pulldown resistance to discharge the output when the device is disabled.
