Overview
The LP3985IM5-2.7/NOPB is a micropower, ultra low-dropout (LDO) CMOS voltage regulator manufactured by Texas Instruments. This device is designed for portable and wireless applications that demand high performance and minimal space. It is optimized for battery-powered systems, offering ultra-low noise, extremely low dropout voltage, and low quiescent current. The regulator is available in a SOT-23-5 package, making it suitable for surface mount applications and ideal for compact designs.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SOT-23-5 |
| Pins | 5 |
| Operating Temperature Range | -40°C to 125°C |
| Input Voltage Range | 2.5 V to 6 V |
| Output Voltage | 2.7 V (fixed) |
| Output Current | 150 mA |
| Dropout Voltage | 100 mV (max) at 150 mA load |
| Quiescent Current (Shutdown) | ≤ 1.5 µA |
| Power Supply Rejection Ratio (PSRR) | 50 dB at 1 kHz |
| Output Noise (RMS) | 30 µV over 10 Hz to 100 kHz |
| Turn-On Time | 200 µs (typical) |
| Protection Features | Over-current, over-temperature, and short-circuit protection |
Key Features
- Ultra low-dropout voltage of 100 mV (max) at 150 mA load.
- Low quiescent current of ≤ 1.5 µA in shutdown mode.
- High power supply rejection ratio (PSRR) of 50 dB at 1 kHz.
- Low output noise of 30 µV RMS over 10 Hz to 100 kHz.
- Fast turn-on time of 200 µs (typical).
- Stable with small 1-µF ±30% ceramic or high-quality tantalum output capacitor.
- Logic-controlled enable function for improved power management.
- Thermal shutdown and short-circuit current limit for enhanced reliability.
- RoHS compliant and lead-free.
Applications
The LP3985IM5-2.7/NOPB is well-suited for a variety of applications, including:
- Portable electronics and battery-powered systems.
- Mobile phones and other handheld devices.
- Low-power wireless applications requiring a regulated and reliable power supply.
Q & A
- What is the maximum output current of the LP3985IM5-2.7/NOPB?
The maximum output current is 150 mA.
- What is the input voltage range for the LP3985IM5-2.7/NOPB?
The input voltage range is from 2.5 V to 6 V.
- What is the typical dropout voltage of the LP3985IM5-2.7/NOPB?
The typical dropout voltage is 100 mV at 150 mA load.
- What is the quiescent current in shutdown mode?
The quiescent current in shutdown mode is ≤ 1.5 µA.
- What is the power supply rejection ratio (PSRR) of the LP3985IM5-2.7/NOPB?
The PSRR is 50 dB at 1 kHz.
- What is the typical turn-on time of the LP3985IM5-2.7/NOPB?
The typical turn-on time is 200 µs.
- Is the LP3985IM5-2.7/NOPB RoHS compliant?
Yes, the device is RoHS compliant and lead-free.
- What type of capacitors is the LP3985IM5-2.7/NOPB stable with?
The device is stable with small 1-µF ±30% ceramic or high-quality tantalum output capacitors.
- Does the LP3985IM5-2.7/NOPB have any protection features?
Yes, it includes over-current, over-temperature, and short-circuit protection.
- What is the operating temperature range of the LP3985IM5-2.7/NOPB?
The operating temperature range is -40°C to 125°C.
