Overview
The LP5907UVX-2.85/NOPB is a 250-mA, ultra-low-noise, low-IQ linear voltage regulator 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 particularly suited for applications where noise performance is critical, such as in mobile phones, tablets, digital cameras, and other portable and battery-powered equipment.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Input Voltage Range | 2.2 | 5.5 | V | |
| Output Voltage Range | 1.2 | 4.5 | V | |
| Output Current | 250 | mA | ||
| Output Voltage Noise | < 6.5 | µVRMS | ||
| PSRR at 1 kHz | 82 | dB | ||
| Output Voltage Tolerance | -2 | 2 | % | |
| Quiescent Current (Enabled) | 12 | µA | ||
| Dropout Voltage (Typical) | 120 | mV | ||
| Operating Junction Temperature | -40 | 125 | °C | |
| Package Type | DSBGA (YKE) | |||
| Pins | 4 |
Key Features
- Input voltage range: 2.2V to 5.5V
- Output voltage range: 1.2V to 4.5V in 25mV steps
- Stable with 1-µF ceramic input and output capacitors; no separate noise bypass capacitor required
- Remote output capacitor placement
- Thermal-overload and short-circuit protection
- Operating junction temperature: –40°C to 125°C
- Low output voltage noise: < 6.5µVRMS
- High PSRR: 82dB at 1kHz
- Very low quiescent current (enabled): 12µA
- Low dropout voltage: 120mV (typical)
- Enable pin for on/off control with automatic output discharge
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 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 12µA.
- 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 operating junction temperature range of the LP5907?
The operating junction temperature range is from –40°C to 125°C.
- What is the PSRR of the LP5907 at 1 kHz?
The PSRR at 1 kHz is 82dB.
- Does the LP5907 have thermal-overload and short-circuit protection?
- Can the LP5907 be controlled using an enable pin?
- What are the typical dropout voltage and output voltage noise of the LP5907?
The typical dropout voltage is 120mV, and the output voltage noise is less than 6.5µVRMS.
- In what package types is the LP5907 available?
The LP5907 is available in DSBGA (YKE), SOT-23, and X2SON packages.
