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LT1965: 1.1A, Low Noise, Low Dropout Linear Regulator Data Sheet8/27/2013PDF974K
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Overview
Features and Benefits
- Output Current: 1.1A
- Dropout Voltage: 310mV
- Low Noise: 40μVRMS (10Hz to 100kHz)
- 500μA Quiescent Current (Adjustable Version)
- Wide Input Voltage Range: 1.8V to 20V
- No Protection Diodes Needed
- Controlled Quiescent Current in Dropout
- Adjustable Output from 1.20V to 19.5V
- Fixed Output Voltages: 1.5V, 1.8V, 2.5V, 3.3V
- < 1μA Quiescent Current in Shutdown
- Stable with 10μF Output Capacitor
- Stable with Ceramic or Tantalum Capacitors
- Reverse-Battery Protection
- No Reverse Current
- Current Limit with Foldback Protection
- Thermal Limiting
- 5-Lead TO-220, DD-Pak, Thermally Enhanced 8-Lead MSOP and 8-Lead 3mm × 3mm DFN Packages
Product Details
The LT1965 series are low noise, low dropout linear regulators. The devices supply 1.1A of output current with a 310mV typical dropout voltage. Operating quiescent current is 500μA for the adjustable version, reducing to <1μA in shutdown. Quiescent current is well controlled; it does not rise in dropout as with many other regulators. The LT1965 regulators have very low output noise which makes them ideal for sensitive RF and DSP supply applications.
Output voltage ranges from 1.20V to 19.5V. The LT1965 regulators are stable with output capacitors as low as 10μF. Internal protection circuitry includes reverse-battery protection, current limiting with foldback, thermal limiting and reverse-current protection. The LT1965 series are available in fixed output voltages of 1.5V, 1.8V, 2.5V, 3.3V, and as an adjustable device with a 1.20V reference voltage. The package offerings include the 5-lead TO-220, 5-lead DD-Pak as well as the thermally enhanced 8-lead MSOP and low profile (0.75mm) 8-lead 3mm × 3mm DFN.
Applications
- Logic Power Supplies
- Post Regulator for Switching Supplies
- Low Noise Instrumentation
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Markets and Technologies
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Documentation & Resources
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Tools & Simulations
LTspice
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Models for the following parts are available in LTspice:
LT1965
LT1965-1.5
LT1965-1.8
LT1965-2.5
LT1965-3.3
LT1965B
Reference Designs (1)
Design Resources
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.