Features and Benefits
- Low Noise: 20µVRMS (10Hz to 100kHz)
- Low Quiescent Current: 25µA/Channel
- Independent Inputs
- Wide Input Voltage Range: 1.8V to 20V
- Output Current: 100mA/Channel
- Very Low Shutdown Current: <0.1µA
- Low Dropout Voltage: 300mV at 100mA
- Adjustable Output from 1.22V to 20V
- Stable with 1µF Output Capacitor
- Stable with Aluminum, Tantalum or Ceramic Capacitors
- Reverse Battery Protected
- No Protection Diodes Needed
- Overcurrent and Overtemperature Protected
- Tracking/Sequencing Capability
- Thermally Enhanced 10-Lead MSOP and DFN Packages
The LT3027 is a dual, micropower, low noise, low dropout regulator with independent inputs. With an external 0.01µF bypass capacitor, output noise is a low 20µVRMS over a 10Hz to 100kHz bandwidth. Designed for use in battery-powered systems, the low 25µA quiescent current per channel makes it an ideal choice. In shutdown, quiescent current drops to less than 0.1µA. Shutdown control is independent for each channel, allowing for flexibility in power management. The device is capable of operating over an input voltage from 1.8V to 20V, and can supply 100mA of output current from each channel with a dropout voltage of 300mV. Quiescent current is well controlled in dropout.
The LT3027 regulator is stable with output capacitors as low as 1µF. Small ceramic capacitors can be used without the series resistance required by other regulators.
Internal protection circuitry includes reverse battery protection, current limiting and thermal limiting protection. The device is available as an adjustable device with a 1.22V reference voltage. The LT3027 regulator is available in the thermally enhanced 10-lead MSOP and low profile (0.75mm) 3mm × 3mm DFN packages.
- Cellular Phones
- Battery-Powered Systems
- Frequency Synthesizers
- Wireless Modems
- Tracking/Sequencing Power Supplies
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Demonstration circuit 811 is a dual 100mA output and dual (independent) input regulator, based on the LT3027, which consists of two identical LDO linear regulators in the 3 × 3 DFN-10 package. Each input has an input voltage range of 2.3V to 20V and a jumper-selectable output voltage of 2.5V, 3.3V, 5V or a user-defined value. The DC quiescent current, per channel, is typically only 20 uA at no load, and less than 0.1 uA in shutdown. The DC811 comes assembled with small ceramic capacitors, showing the LT3027 ability to maintain stability with ceramic output capacitors.
Tools & Simulations
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Models for the following parts are available in LTspice:
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.