Overview
The LP2985AIM5X-3.3 is a low-dropout voltage regulator (LDO) designed by National Semiconductor, now part of Texas Instruments. This regulator is optimized for use in space-constrained and battery-powered applications, offering ultra-low dropout and low noise characteristics. It features a fixed output voltage of 3.3V and can supply up to 150mA of load current. The LP2985AIM5X-3.3 is available in a compact SOT-23 package, making it ideal for applications where board space is limited.
Key Specifications
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Product Status | Obsolete | Output Configuration | Positive |
| Output Type | Fixed | Number of Regulators | 1 |
| Voltage - Input (Max) | 16V | Voltage - Output (Min/Fixed) | 3.3V |
| Voltage Dropout (Max) | 0.58V @ 150mA | Current - Output | 150mA |
| Current - Quiescent (Iq) | 95 µA | Current - Supply (Max) | 2.5 mA |
| PSRR | 45dB (1kHz) | Control Features | Enable |
| Protection Features | Over Current, Over Temperature, Short Circuit | Operating Temperature | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Package/Case | SOT23-5 |
Key Features
- Ultra-Low Dropout Voltage: Typically 300 mV at 150 mA load and 7 mV at 1 mA load, making it suitable for battery-powered devices.
- Low Noise: 30 µV RMS with a 10-nF bypass capacitor, ensuring minimal noise in the output voltage.
- Low Quiescent Current: 75 µA, which helps in maximizing battery life in portable devices.
- Enhanced Stability: Stable with output capacitor ESR as low as 5 mΩ, allowing the use of ceramic capacitors.
- Protection Features: Includes overcurrent, overtemperature, and short-circuit protection to ensure safe operation.
- Compact Package: Available in SOT-23 and micro SMD packages, using minimal board space.
- Wide Input Voltage Range: Supports an input voltage range from 2.5 V to 16 V.
- High PSRR: Greater than 70 dB at 1 kHz and 40 dB at 1 MHz, helping to attenuate the switching frequency of upstream DC/DC converters.
Applications
- Battery-Powered Devices: Ideal for portable electronics where low dropout voltage and low quiescent current are crucial.
- Space-Constrained Designs: Suitable for applications where minimal board space is available due to its compact SOT-23 package.
- Low-Voltage Microcontrollers and Processors: Supports the power requirements of low-voltage MCUs and processors with high accuracy and stability.
- Aerospace and Industrial Systems: Can be used in various industrial and aerospace applications requiring reliable and stable voltage regulation.
Q & A
- What is the maximum output current of the LP2985AIM5X-3.3?
The maximum output current is 150 mA.
- What is the typical dropout voltage of the LP2985AIM5X-3.3 at full load?
The typical dropout voltage is 300 mV at 150 mA load.
- What is the quiescent current of the LP2985AIM5X-3.3?
The quiescent current is typically 75 µA.
- What protection features does the LP2985AIM5X-3.3 have?
It includes overcurrent, overtemperature, and short-circuit protection.
- What is the operating temperature range of the LP2985AIM5X-3.3?
The operating temperature range is -40°C to 125°C.
- What is the input voltage range of the LP2985AIM5X-3.3?
The input voltage range is from 2.5 V to 16 V.
- What package types are available for the LP2985AIM5X-3.3?
It is available in SOT-23 and micro SMD packages.
- How does the LP2985AIM5X-3.3 ensure stability with output capacitors?
It is stable with output capacitor ESR as low as 5 mΩ, allowing the use of ceramic capacitors.
- What is the PSRR of the LP2985AIM5X-3.3?
The PSRR is greater than 70 dB at 1 kHz and 40 dB at 1 MHz.
- Is the LP2985AIM5X-3.3 RoHS compliant?
Yes, the LP2985AIM5X-3.3 is RoHS compliant.
