LDO Regulator delivers up to 100 mA output current.
Share:
Press Release Summary:
Enabling 340 mV dropout voltage at full load, LT3050 features 2-45 V input voltage range, delivering adjustable output from 0.6-44.5 V. Capacitor at REF/BYP pin allows noise down to 30 µVRMS across 10 Hz to 100 kHz bandwidth. Various diagnostic and safety features are integrated as well as reverse-battery protection, reverse-output and current protection, and current and thermal limiting. Operating with 2.2 µF capacitor, it has quiescent current of 50 µA during operation.
Original Press Release:
45 V 100 mA LDO Offers 30 µVRMS Noise, Programmable Current Limit, and Diagnostic Information
MILPITAS, CA - September 14, 2009 - Linear Technology Corporation announces the LT3050, a high voltage, low noise, low dropout voltage linear regulator offering precision, programmable current limit and diagnostic capability. The device delivers up to 100mA output current with a 340mV dropout voltage at full load. The LT3050 features a wide 2V to 45V input voltage range, delivering adjustable output voltages from 0.6V to 44.5V. A single capacitor at the REF/BYP pin provides programmable low noise operation--only 30µVRMS across a wide bandwidth of 10Hz to 100kHz - and reference soft start functionality, preventing output voltage overshoot at turn-on. Output voltage tolerance is highly accurate at ±2% over line, load and temperature.
The LT3050 provides several diagnostic and safety functions. A single resistor at the IMAX pin programs current limit, accurate to ±5% over the full input voltage and temperature range. Also, a single resistor at the IMIN pin programs a minimum output current detector, useful for identifying open-circuit conditions. Furthermore, a current monitor function sources current equal to 1/100th of output current, allowing the user to measure output current or calculate the device's power dissipation. A logic Fault pin asserts low if the LT3050 is in current limit, operating below its minimum output current (open-circuit) or is in thermal shutdown. Moreover, the LT3050's internal protection circuitry includes reverse-battery protection, reverse-output protection, reverse-current protection, internal default current limiting and thermal limiting.
The LT3050 operates with a very small, low cost, 2.2µF ceramic output capacitor, optimizing stability and transient response. This tiny external capacitor can be used without the addition of series resistance (ESR) as is common with many other regulators. The LT3050's wide input and output voltage ranges, fast transient response, low quiescent current of 50µA (operating) and < 1µA (in shutdown) make it an excellent choice for active antenna supplies, industrial power supplies, battery-powered systems requiring optimum run time, and high reliability power supplies requiring diagnostic information and protection functions.
The LT3050EDDB & LT3050IDDB are housed in the 12-lead 2mm x 3mm DFN package, while the LT3050EMS8E & LT3050IMS8E are available in the 12-lead thermally enhanced MSOP package, all offering a compact footprint. Both "E" and "I" grade versions are available from stock with an operating junction temperature of -40ºC to +125ºC, while the "MP" grade operates from -55ºC to +125ºC (MSOP package only, LT3050MPMS8E) . 1,000 piece pricing starts at $1.55 & $1.75 each for the DFN package E and I grades, respectively, and $1.55, $1.75 and $4.19 each for the MSOP package E, I and MP grades, respectively. For more information, visit www.linear.com.
Summary of Features: LT3050
Output Current: 100mA
Dropout Voltage: 340mV
Input Voltage Range: 2V to 45V
Programmable Precision Current Limit: ±5%
Programmable Minimum IOUT Detector
Output Current Monitor: 1/100th of IOUT
Fault Indicator: Current Limit, Minimum IOUT or Thermal Limit
Low Noise: 30µVRMS (10Hz to 100kHz)
Adjustable Output (VREF = VOUT(MIN) = 0.6V)
Reference Soft Start Capability Prevents Output Voltage Turn-on Overshoot
Output Tolerance: ±2% Over Line, Load and Temperature
Stable with Low ESR, Ceramic Output Capacitors (2.2µF minimum)
Shutdown Current: <1µA
Reverse Battery and Reverse Current Protection
Thermal Limit Protection
12-Lead 2mm - 3mm DFN & MSOP Packages
45VIN, 0.6VOUT 100mA Ultralow Noise LDO with Diagnostics
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.
Worldwide Contacts
North America and General Information
John Hamburger
Tel: (408) 432-1900 ext. 2419
jhamburger@linear.com
Doug Dickinson
Tel: (408) 432 1900 ext. 2233
ddickinson@linear.com
China (PRC)
Fanny Lau
Tel: 852-2428-0303
flau@linear.com
Angela Ao
Tel: (8610)6522 8081
angela.ao@ebacomms.com
