Overview
The LP2985IM5-5.0/NOPB is a fixed-output, wide-input, low-noise, low-dropout voltage regulator produced by Texas Instruments. This regulator supports an input voltage range from 2.5 V to 16 V and can supply up to 150 mA of load current. It is designed to meet the needs of low-voltage microcontrollers (MCUs) and processors with high accuracy and stability.
The device is available in a compact 5-pin SOT-23 (DBV) package, making it suitable for space-constrained applications. It features low output noise, high power supply rejection ratio (PSRR), and internal protection mechanisms such as overcurrent and overtemperature protection.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 2.5 V to 16 V |
| Output Voltage Range (New Chip) | 1.2 V to 5.0 V (fixed, 100-mV steps) |
| Output Voltage Range (Legacy Chip) | 2.5 V to 6.1 V |
| Output Accuracy | ±0.5% for new chip, ±1% for A-grade legacy chip, ±1.5% for standard-grade legacy chip |
| Output Current | Up to 150 mA |
| Quiescent Current (IQ) | 71 µA at ILOAD = 0 mA, 750 µA at ILOAD = 150 mA (new chip) |
| Shutdown Current | 0.05 µA (typ) for legacy chip, 1.12 µA (typ) for new chip |
| Output Noise | 30 µV RMS with 10-nF bypass capacitor |
| PSRR | 70 dB at 1 kHz, 40 dB at 1 MHz |
| Operating Junction Temperature | –40°C to +125°C |
| Package | 5-pin SOT-23 (DBV) |
Key Features
- Wide input voltage range from 2.5 V to 16 V
- High output accuracy: ±0.5% for new chip, ±1% for A-grade legacy chip, ±1.5% for standard-grade legacy chip
- Low output noise: 30 µV RMS with 10-nF bypass capacitor
- High PSRR: 70 dB at 1 kHz, 40 dB at 1 MHz
- Low quiescent current: 71 µA at ILOAD = 0 mA, 750 µA at ILOAD = 150 mA (new chip)
- Shutdown current as low as 0.05 µA (typ) for legacy chip and 1.12 µA (typ) for new chip
- Internal soft-start time and current-limit protection
- Overcurrent and overtemperature protection
- Stable with 2.2-µF ceramic capacitors
Applications
The LP2985IM5-5.0/NOPB is suitable for a variety of applications requiring stable and low-noise voltage regulation. These include:
- Low-voltage microcontrollers (MCUs) and processors
- Portable electronics and battery-powered devices
- Industrial control systems and automation
- Medical devices requiring high accuracy and low noise
- Consumer electronics such as smartphones, tablets, and laptops
Q & A
- What is the input voltage range of the LP2985IM5-5.0/NOPB?
The input voltage range is from 2.5 V to 16 V.
- What are the output voltage ranges for the new and legacy chips?
The new chip supports an output range of 1.2 V to 5.0 V, while the legacy chip supports an output range of 2.5 V to 6.1 V.
- What is the maximum output current of the LP2985IM5-5.0/NOPB?
The maximum output current is up to 150 mA.
- What is the quiescent current (IQ) of the new chip?
The quiescent current is 71 µA at ILOAD = 0 mA and 750 µA at ILOAD = 150 mA.
- What is the output noise of the LP2985IM5-5.0/NOPB?
The output noise is 30 µV RMS with a 10-nF bypass capacitor.
- What are the protection features included in the LP2985IM5-5.0/NOPB?
The device includes overcurrent and overtemperature protection, as well as internal soft-start time and current-limit protection.
- What is the operating junction temperature range of the LP2985IM5-5.0/NOPB?
The operating junction temperature range is –40°C to +125°C.
- In what package is the LP2985IM5-5.0/NOPB available?
The device is available in a 5-pin SOT-23 (DBV) package.
- What are some typical applications for the LP2985IM5-5.0/NOPB?
Typical applications include low-voltage microcontrollers, portable electronics, industrial control systems, medical devices, and consumer electronics.
- How does the LP2985IM5-5.0/NOPB minimize post-regulator filtering?
The device minimizes post-regulator filtering through its high PSRR performance of greater than 70 dB at 1 kHz and 40 dB at 1 MHz.
