Dual 500mA Linear LDO Regulator is optimized for low noise.February 10, 2010 -
Available in MSOP-16E and 4 x 3 mm DFN-16 packages, LT3029 operates from 1.8-20 V input and delivers up to 500 mA per channel of continuous output current with low dropout voltage of 300 mV at full load. It features 20 µVRMS noise across 10 Hz to 100 kHz bandwidth and provides independent inputs and shutdown control for each channel. Delivering adjustable output voltages from 1.215-19.5 V, product offers tracking/sequencing capability and is stable with 3.3 µF output capacitor.
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Original Press release
Linear Technology Corp.
1630 McCarthy Blvd.
Milpitas, CA, 95035
USA
Dual 500mA Linear LDO Regulator with Independent Inputs Offers Ultra Low Noise
MILPITAS, CA - Linear Technology Corporation announces the LT3029, a dual low noise, low dropout regulator with independent inputs and independent shutdown control for each channel. The device delivers up to 500mA per channel of continuous output current with a low dropout voltage of only 300mV at full load. The LT3029 features a wide input voltage range of 1.8V to 20V, delivering output voltages as low as 1.215V and up to 19.5V. The device features ultralow noise of only 20µVRMS across a wide bandwidth of 10Hz to 100kHz, and offers tracking/sequencing capability. Its full feature set and low quiescent current of 55µA per regulator (operating) and <1µA (in shutdown) make it an excellent choice for battery-powered "keep alive" systems that require optimum run time, in addition to microprocessor core logic supplies, tracking/sequencing supplies and general purpose voltage conversion.
The LT3029 operates with very small, low cost, ceramic output capacitors, optimizing stability and transient response. It is stable with only a 3.3µF output capacitor versus older linear regulators that require between 10µF and 100µF to maintain stability. These tiny external capacitors can be used without the necessary addition of series resistance (ESR) as is common with many other regulators. Internal protection circuitry includes reverse-battery, no reverse current flow from output to input, current limiting with foldback and thermal shutdown. The thermal shutdown circuitry protects both channels if an overload or fault condition on either channel occurs.
The LT3029's compact packages offer thermal resistances equivalent to much larger conventional packages. The LT3029EMSE, LT3029IMSE, LT3029EDE and LT3029IDE are available from stock in a proprietary 16-lead thermally enhanced MSOP package and a 16-lead 4mm x 3mm DFN package, with operating junction temperature of -40°C to +125°C. The LT3029HMSE and LT3029MPMSE are available and offered in the MSOP package with extended operating junction temperatures of -40°C to +150°C and -55°C to +125°C, respectively. Pricing starts at $2.87, $3.13, $3.47, and $7.74 each for the E, I, H and MP grades, respectively, in 1,000-piece quantities. For more information, visit www.linear.com.
Summary of Features: LT3029
Output Current: 500mA per Channel
Low Dropout Voltage: 300mV
Low Noise: 20µVRMS (10Hz to 100kHz)
Low Quiescent Current: 55µA per Channel
Wide Input Voltage Range: 1.8V to 20V
Adjustable Output Voltage: 1.215V to 19.5V
Stable with 3.3µF Minimum Output Ceramic Capacitor
Low Shutdown Current <1µA
Reverse Battery Protection
No Reverse Current Flow from Output to Input
Thermal Shutdown & Current Limiting with Foldback
Thermally Enhanced MSOP-16E & 4mm x 3mm DFN-16 Packages
About Linear Technology
Linear Technology Corporation, a manufacturer of high performance linear integrated circuits, was founded in 1981, became a public company in 1986 and joined the S&P 500 index of major public companies in 2000. Linear Technology products include high performance amplifiers, comparators, voltage references, monolithic filters, linear regulators, DC-DC converters, battery chargers, data converters, communications interface circuits, RF signal conditioning circuits, µModule® products, and many other analog functions. Applications for Linear Technology's high performance circuits include telecommunications, cellular telephones, networking products such as optical switches, notebook and desktop computers, computer peripherals, video/multimedia, industrial instrumentation, security monitoring devices, high-end consumer products such as digital cameras and MP3 players, complex medical devices, automotive electronics, factory automation, process control, and military and space systems.
LT, LTC, LTM, µModule and are registered trademarks of Linear Technology Corp. All other trademarks are the property of their respective owners.
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