Product category: Power Supply ICs and Controllers
News Release from: National Semiconductor | Subject: LM26001
Edited by the Electronicstalk Editorial Team on 18 May 2006
Switching regulator suits automotive
duties
A 1.5A buck regulator claims industry-best quiescent current and feedback voltage accuracy for stringent automotive applications, such as dashboard and infotainment systems.
National Semiconductor Corporation has introduced a 1.5A buck regulator with industry-best quiescent current and feedback voltage accuracy for stringent automotive applications, such as dashboard and infotainment systems, that must provide basic functionality even in standby mode The LM26001 has a low sleep-mode quiescent current of just 40uA, compared with 100uA typically achieved by competing solutions
This article was originally published on Electronicstalk on 5 Jan 2001 at 8.00am (UK)
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These best-in-class specifications make the LM26001 well-suited for automotive applications, as well as battery-powered medical and measurement applications, including portable insulin pumps and blood pressure monitors that require continuous operation.
"National's LM26001, with its ultra-low quiescent current and easily controlled operating frequency, offers designers the ability to meet the demanding specifications of automotive applications, such as GPS receivers and infotainment systems, where consumers expect performance even in very low-power situations", said Mal Humphrey, Business Unit Director for National Semiconductor's Power Management Group.
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"The LM26001 is National's latest product optimised for automotive applications and joins the company's wide range of power products, op amps, temperature sensors and data convertors for this market".
National will demonstrate the LM26001 at PCIM Europe, in Nuremberg, Germany, from 30th May to 1st June 2006 in Hall 12, Booth 124.
Earlier this month, National announced that the company received ISO/TS16949 certification from Det Norske Veritas (DNV) Certification Incorporated.
The certification includes requirements of the ISO9001:2000 as well as the ISO/TS16949:2002 standard, which meets the stringent quality requirements of automotive customers.
The LM26001 is a switching regulator designed for the high-efficiency requirements of battery-powered applications requiring always-on stand-by modes.
It has a low-current sleep mode to maintain high efficiency under light load conditions and current-mode control for optimal performance over a wide input voltage range.
Quiescent current, the current consumed by the device when not switching, is typically 10uA in shutdown mode and less than 40uA in sleep mode.
The LM26001 also has forced pulsewidth modulation (PWM), frequency adjust and clock synchronisation inputs.
These features allow system designers to control the operating frequency to avoid interference with other electronics.
The LM26001 can deliver up to 1.5A of continuous load current with a fixed current limit through the internal N-channel switch.
It has a wide input voltage range from 4.0 to 38V and can operate with input voltages as low as 3V during cold-crank transients.
The operating frequency is adjustable from 150 to 500kHz with a single resistor and can be synchronised to an external clock.
Other features include power good, adjustable soft-start, enable pin, input under-voltage protection and an internal bootstrap diode for reduced component count.
The LM26001 is housed in a TSSOP-16 package.
National has supplied semiconductors to the automotive market since silicon made its first appearance in vehicles more than four decades ago.
With a broad analogue portfolio of automotive-ready products, National's chips can be found in nearly every automobile subsystem.
Its power management technology, high-speed data conversion and interface products, precision operational amplifiers, temperature sensors and display drivers provide the key components for a range of systems from today's car alarms to emerging systems such as telematics, infotainment, driver information and automation systems, wireless connectivity, in-vehicle networking and drive-by-wire.
The LM26001 is priced at $3.00 in 1000-unit quantities.
Samples and evaluationboards are available through local National sales representatives.
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