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500-mA negative micropower LDO offers high reliability benefits
August 19, 2010 // Paul Buckley
Linear Technology Corporation has released a new high reliability, military plastic MP-grade version of the LT1175, a 500mA negative micropower low dropout regulator.
The MP-grade LT1175 is offered in SOIC-8 and DD-Pak packages with a -55 to +125 degrees C operating junction temperature range. With a wide input voltage range of -4.3 V to -20 V, the LT1175 features micropower operating currents of 45 µA quiescent and 10
µA in shutdown, preventing output voltage rise under no-load conditions. The device's reference amplifier topology ensures precision DC characteristics and the ability to maintain good loop stability with a wide range of output capacitors. The device's power transistor anti-saturation design enables very low dropout voltage of 500 mV (typical at full load). Fixed 5 V and adjustable (-3.8 V to -19.5 V) output voltage versions are available.
Several features make the LT1175 user-friendly. The SHDN pin can interface directly to either positive or negative logic levels. Unlike prior regulators, the increase in quiescent current during a dropout condition is actively limited. The LT1175 offers complete protection including user-selectable current limit at 200 mA, 400 mA, 600 mA and 800 mA, power limiting (current limit foldback), thermal shutdown and the ability to force the output to reverse voltage without damage or latchup.
In addition to the SOIC-8 and power DD-Pak packages, the LT1175 is available in a 3-lead SOT-223, a through-hole power TO-220 package and an 8-pin PDIP package. C-grade operating junction temperature is 0 to +125 degrees C, I grade is specified from -40 to +125 degrees C, and MP grade is -55 to +125 degrees C. 1k pricing for the MP grade in DD-Pak is 9.60 US Dollars and SOIC is 8.70 US Dollars, and devices are available in stock.
Datasheet: LT1175
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Technology News
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STMicroelectronics has developed a silicon-on-insulator (SOI) CMOS process that can integrate all the RF functions of multi-band ...
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Filter Wizard
Check out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFER
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The SoCKIT evaluation kit is Arrow's latest development tool, featuring an Altera Cyclone V SoC with a dual-core ARM Cortex-A9 MPCore processor integrated within its 28nm FPGA fabric.
Altera SoCs allow embedded system developers to differentiate their end product with customized hardware and software, and extend the product lifecycle through hardware and software updates in the field. This month, Arrow Electronics is giving away five SoCKIT evaluation kits featuring Altera’s ARM-Based SoCs, worth €249 each, together with the free entrance to one of Arrow’s SoC workshops organized throughout Europe.
And the winners are...
In our previous reader offer, Freescale Semiconductor was giving away five IMX6Q, Sabre-lite kits, worth £128.06 each.
Lucky winners include Mr. X. Salada Sole from the UK, Mrs A. Peric from Germany, Mr Z. Janosy from Hungary, Mr D. Gacina from Croatia and Mr B. Boris from France. All should be receiving their packages soon. Let's wish them some interesting findings with their projects.
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December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.
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