Overview
The LP2985AIM5-1.8 is a micropower, low-noise, low-dropout voltage regulator designed and manufactured by Texas Instruments. This regulator is part of the LP2985 family and is optimized for high performance and low noise in battery-powered applications. It is particularly suited for devices requiring output voltages of 1.8 V and can deliver a continuous load current of up to 150 mA. The LP2985AIM5-1.8 uses an optimized vertically integrated PNP (VIP) process, ensuring enhanced stability and low quiescent current, making it ideal for power-efficient designs.
Key Specifications
| Parameter | Value |
|---|---|
| Regulator Type | Low Dropout Voltage |
| Maximum Output Current | 150 mA |
| Output Voltage | 1.8 V |
| Number of Outputs | 1 |
| Line Regulation | 0.014 %/V |
| Accuracy | ±2.5% |
| Mounting Type | Surface Mount |
| Polarity | Positive |
| Package Type | SOT-23 |
| Pin Count | 5 |
| Output Type | Fixed |
| Dimensions | 2.92 mm x 1.6 mm x 1.02 mm |
| Maximum Input Voltage | 16 V |
| Minimum Operating Temperature | -40°C |
| Maximum Operating Temperature | +125°C |
| Minimum Input Voltage | 2.2 V |
Key Features
- High Peak Current Capability: The regulator can handle high peak currents, ensuring stable operation under varying load conditions.
- Low ZOUT: With a typical output impedance of 0.3 Ω from 10 Hz to 1 MHz, the LP2985AIM5-1.8 offers excellent noise performance.
- Overtemperature/Overcurrent Protection: Built-in protection mechanisms prevent the regulator from overheating or overcurrent conditions.
- Wide Operating Temperature Range: The regulator operates reliably from -40°C to +125°C, making it suitable for a variety of environmental conditions.
- Low Quiescent Current: The regulator consumes less than 1 µA of quiescent current when in sleep mode, enhancing power efficiency.
- Enhanced Stability: Stable operation is ensured even with low-ESR output capacitors, such as ceramic capacitors.
- Precision Output Voltage: The regulator offers output voltage accuracy of 1% for the A grade version.
- Low Noise: By adding a 10-nF bypass capacitor, the output noise can be reduced to 30 µV (typical).
Applications
- Cellular Phones: Ideal for powering components in mobile phones due to its low noise and high efficiency.
- Palmtop/Laptop Computers: Suitable for use in portable computing devices requiring reliable and efficient power regulation.
- Personal Digital Assistants (PDAs): Used in PDAs and other handheld devices to ensure stable and efficient power supply.
- Camcorders, Personal Stereos, Cameras: Applicable in various consumer electronics where low noise and high performance are critical.
Q & A
- What is the maximum output current of the LP2985AIM5-1.8?
The maximum output current is 150 mA.
- What is the output voltage of the LP2985AIM5-1.8?
The output voltage is fixed at 1.8 V.
- What is the typical quiescent current when the regulator is in sleep mode?
The quiescent current is less than 1 µA when the ON/OFF pin is pulled low.
- What is the operating temperature range of the LP2985AIM5-1.8?
The regulator operates from -40°C to +125°C.
- What type of protection mechanisms does the LP2985AIM5-1.8 have?
The regulator includes overtemperature and overcurrent protection.
- Can the LP2985AIM5-1.8 use ceramic capacitors on the output?
Yes, it is stable with output capacitor equivalent series resistance (ESR) as low as 5 mΩ, allowing the use of ceramic capacitors.
- How can the output noise be reduced?
By adding a 10-nF bypass capacitor, the output noise can be reduced to 30 µV (typical).
- What is the typical ground pin current at a 150-mA load?
The typical ground pin current is 825 µA at a 150-mA load.
- What is the maximum input voltage for the LP2985AIM5-1.8?
The maximum input voltage is 16 V.
- What package types are available for the LP2985AIM5-1.8?
The regulator is available in SOT-23 and DSBGA packages.
