LT3028 - Dual 100mA/500mA Low Dropout, Low Noise, Micropower Regulators with Independent Inputs
- Low Noise: 20µVRMS (10Hz to 100kHz)
- Low Quiescent Current: 30µA/Output
- Independent Inputs
- Wide Input Voltage Range: 1.8V to 20V
- Output Current: 100mA/500mA
- Very Low Shutdown Current: <0.1µA
- Low Dropout Voltage: 300mV/320mV at 100mA/500mA
- Adjustable Outputs from 1.22V to 20V
- Stable with as Low as 1µF/3.3µF 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 16-Lead TSSOP and 16-Lead (5mm × 3mm) DFN Packages
AEC-Q100 data available for specific packages
DescriptionThe LT3028 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 30µA quiescent current per output makes it an ideal choice. In shutdown, quiescent current drops to less than 0.1µA. Shutdown control is independent for each output, allowing for flexibility in power management. The device is capable of operating over an input voltage range of 1.8V to 20V. Output 1 can supply 500mA of output current with a dropout voltage of 320mV. The device can supply 100mA of output current from Output 2 with a dropout voltage of 300mV. Quiescent current is well controlled in dropout.
The LT3028 regulator is stable with output capacitors as low as 1µF for the 100mA output and 3.3µF for the 500mA output. 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 LT3028 regulator is available in the thermally enhanced 16-lead TSSOP and 16-lead, low profile (5mm × 3mm × 0.75mm) DFN packages.
Protected by U.S. Patents including 6118263, 6144250.
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
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Demo BoardsLinear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.
|DC832A||LT3028DHC Demo Board | Dual Input, Dual Output Linear Regulator, 2.3V ≤ VIN ≤ 20V, Vout1 = 2.5V/3.3V/5V @ 500mA, Vout2 = 2.5V/3.3V/5V @ 100mA||$125.00|
Designed for Automotive and Transportation ApplicationsAEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page
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- Cellular Phones
- Battery-Powered Systems
- Frequency Synthesizers
- Wireless Modems
- Tracking/Sequencing Power Supplies
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