Product category: Power Supply ICs and Controllers
News Release from: National Semiconductor | Subject: LP399x family
Edited by the Electronicstalk Editorial Team on 18 June 2004
LDOs are tailored to specific handheld
loads
A new generation of seven low dropout (LDO) regulators is designed to meet the unique power management needs of digital processor, analogue and RF subsystems.
A new generation of seven low dropout (LDO) regulators is designed to meet the unique power management needs of digital processor, analogue and RF subsystems National's new LDOs are optimised for cellphones, notebooks, PDAs, MP3 players and other handheld portable systems
This article was originally published on Electronicstalk on 5 Jan 2001 at 8.00am (UK)
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In the past, designers had to choose a general-purpose LDO to meet system requirements.
Using National's new LP399x family of products, designers now have a portfolio of LDOs customised to meet the power needs of digital loads or RF and analogue loads in mobile and handheld devices.
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With their small size, ultralow dropout voltages and lower current usage during standby mode, these new CMOS linear regulators enable designers to create smaller devices with longer battery life.
"In 2004, National shipped more than a quarter-billion linear regulators into the cellular and handheld markets", said Martin Moss, Marketing Manager of the Portable Power Systems Group, National Semiconductor.
"National's new LDOs extend our broad product portfolio by providing system architects with unmatched design flexibility, smaller form-factors and superior energy efficiency".
With a 12.5% share of the market, National Semiconductor is the world's number one supplier of analogue power integrated circuits (including switching regulators, voltage regulators and references), according to market research firm Databeans.
In addition, the company was one of the fastest-growing analogue power IC suppliers with nearly 30% growth in 2003.
To power digital cores, designers require excellent line and load transient response with sub-1uF ceramic capacitors, output voltages as low as 0.8V, as well as fast turn/off times while consuming very little operating current.
The LP3990 is a 150mA CMOS linear regulator that features preset output voltages between 3.3 and 0.8V, and is optimised to meet the requirements of portable and battery-powered devices.
It offers the ideal balance between fast load transient response and low operating current.
The LP3990 works without a reference bypass capacitor, saving space on printed circuit boards and reducing the overall bill of materials (BOM).
Packaging options are large bump micro SMD, LLP chip-scale and SOT23-5.
Samples are available now.
The price is $0.37 each 1000-unit quantities.
The LP3992 is a 30mA CMOS linear regulator designed for digital loads.
It is particularly well suited to power for applications such as Bluetooth baseband devices, where the controlled turn-on and turn-off times ensure the digital device does not fall into nondefined states.
Samples are available now in SOT23-5 packages.
The price is $0.35 each in 1000-unit quantities.
The LP3993,- National's new 80mA CMOS linear regulator, offers very low operating current for mobile applications where fast startup and good line and load regulation are important.
Operating current of 10uA at 1mA load significantly increases standby time.
The LP3993 also works without a bypass capacitor, reducing the overall PCB area and BOM.
Packaging options are large-bump thin, micro SMD and SOT23-5.
Samples are available now.
The cost is $0.36 each in 1000-unit quantities.
The LP3994 is a 50mA CMOS linear regulator designed for low operating current, low noise and accurate output voltage.
The device operates in the 2.5 to 6.0V input range and has a low operating current range of 20uA when enabled.
When disabled the device draws virtually zero current.
Packaging options are large-bump, thin micro SMD and LLP chip-scale packages.
LP3994 samples are available now.
The price is $0.36 each in 1000-unit quantities.
The LP3997 is a 250mA CMOS linear regulator that can supply up to 500mA peak output and features an "out-of-regulation" error flag that indicates when the device's output is below the nominal voltage.
LP3997 samples are available now.
The price is $0.40 each in 1000-unit quantities.
To power RF loads, designers require low noise, excellent power supply rejection ration (PSRR) and low dropout.
National's LP3995 and LP3999 complement the company's successful LP3985 family by extending the output voltage range down to 1.5V.
These new linear regulators are designed specifically for portable and wireless applications powered by Li-ion and Ni-MH batteries.
They offer device noise down to 25uV RMS, improved PSRR to above 60dB at 1kHz, dropout performance to 60mV at 150mA.
The LP3995 and LP3999 are improved versions of the LP3985 with lower noise, lower output voltages and faster turn-on and active turn-off.
The LP3995 is offered in a large-bump thin micro SMD and a LLP chip-scale packages.
Samples of National's LP3995 are available now.
Prices are $0.36 each in units of 1000 pieces and $0.32 each in units of 10,000 pieces.
LP3999 samples are also available now.
The price is $0.36 each in 1000-unit quantities.
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