Overview
The LP2985AIM5-3.6/NOPB, produced by Texas Instruments, is a fixed-output, wide-input, low-noise, low-dropout voltage regulator. This device supports an input voltage range from 2.5 V to 16 V and can deliver up to 150 mA of load current. It is designed to provide high accuracy and stability, making it suitable for a variety of battery-powered and low-voltage applications, including microcontrollers and processors.
The LP2985-N series, which includes the LP2985AIM5-3.6/NOPB, is known for its low dropout voltage, high PSRR (Power Supply Rejection Ratio), and low output noise. These features ensure minimal post-regulator filtering and effective attenuation of switching frequencies from upstream DC/DC converters.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 2.5 V to 16 V | V |
| Output Voltage Range (New Chip) | 1.2 V to 5.0 V (fixed, 100-mV steps) | V |
| Output Voltage Range (Legacy Chip) | 2.5 V to 6.1 V | V |
| Output Current | Up to 150 mA | mA |
| Output Voltage Accuracy (New Chip) | ±0.5% | % |
| Output Voltage Accuracy (Legacy Chip) | ±1% (A-grade), ±1.5% (standard-grade) | % |
| Quiescent Current (New Chip) | 71 µA at I_LOAD = 0 mA, 750 µA at I_LOAD = 150 mA | µA |
| Shutdown Current | 1.12 µA (typ) for new chip, 0.05 µA (typ) for legacy chip | µA |
| Output Noise | 30 µV RMS with 10-nF bypass capacitor | µV RMS |
| PSRR | 70 dB at 1 kHz, 40 dB at 1 MHz | dB |
| Operating Junction Temperature | –40°C to +125°C | °C |
| Package | 5-pin SOT-23 (DBV) |
Key Features
- Wide input voltage range from 2.5 V to 16 V
- Fixed output voltage options from 1.2 V to 5.0 V (new chip) and 2.5 V to 6.1 V (legacy chip)
- High output voltage accuracy: ±0.5% for new chip, ±1% for A-grade legacy chip, and ±1.5% for standard-grade legacy chip
- Low dropout voltage: 300 mV typical at 150 mA load current
- Low quiescent current: 71 µA at I_LOAD = 0 mA and 750 µA at I_LOAD = 150 mA for new chip
- Low output noise: 30 µV RMS with a 10-nF bypass capacitor
- High PSRR: 70 dB at 1 kHz and 40 dB at 1 MHz
- Internal soft-start and current-limit protection
- Overcurrent and overtemperature protection
- Stable operation with low-ESR ceramic capacitors
Applications
- Cellular phones
- Palmtop and laptop computers
- Personal Digital Assistants (PDA)
- Camcorders, personal stereos, and cameras
- Battery-powered devices requiring low noise and high accuracy voltage regulation
- Low-voltage microcontrollers (MCUs) and processors
Q & A
- What is the input voltage range of the LP2985AIM5-3.6/NOPB?
The input voltage range is from 2.5 V to 16 V.
- What are the output voltage options for the LP2985-N series?
The output voltage range is from 1.2 V to 5.0 V (new chip) and 2.5 V to 6.1 V (legacy chip).
- What is the maximum output current of the LP2985AIM5-3.6/NOPB?
The maximum output current is up to 150 mA.
- What is the quiescent current of the LP2985AIM5-3.6/NOPB?
The quiescent current is 71 µA at I_LOAD = 0 mA and 750 µA at I_LOAD = 150 mA for the new chip.
- What is the output noise of the LP2985AIM5-3.6/NOPB?
The output noise is 30 µV RMS with a 10-nF bypass capacitor.
- What is the PSRR of the LP2985AIM5-3.6/NOPB?
The PSRR is 70 dB at 1 kHz and 40 dB at 1 MHz.
- What are the protection features of the LP2985AIM5-3.6/NOPB?
The device includes overcurrent and overtemperature protection, as well as internal soft-start and current-limit protection.
- What is the operating junction temperature range of the LP2985AIM5-3.6/NOPB?
The operating junction temperature range is –40°C to +125°C.
- In what package is the LP2985AIM5-3.6/NOPB available?
The device is available in a 5-pin SOT-23 (DBV) package.
- What are some typical applications of the LP2985AIM5-3.6/NOPB?
Typical applications include cellular phones, palmtop and laptop computers, personal digital assistants (PDA), and other battery-powered devices requiring low noise and high accuracy voltage regulation.
