Margining Controller simplifies automated PCB testing.

Press Release Summary:

Model LTC2920 power supply margining controller allows supply rails to be precisely adjusted up and down during PCB testing. It sources or sinks current into feedback node of controller chip or voltage adjust pin of regulator module. Margining current is set with single resistor channel. Output current is settable over 400:1 range and margin voltage precision of <0.4% guarantees proper and accurate margining tests.

Original Press Release:

Power Supply Margining Controller Simplifies Automated PCB Testing

MILPITAS, CA - April 16, 2003 - Linear Technology introduces the LTC2920, a power supply margining controller that allows supply rails to be precisely adjusted up and down during automated PCB testing. This testing, known as "margining," is a valuable feature in high reliability applications as it validates the correct operation of electrical components at the upper and/or lower power supply voltage limits allowed for a given design.

The LTC2920 adjusts the power supply voltage by sourcing or sinking current into the feedback node of the controller chip or the voltage adjust pin of the regulator module. The versatile output stage and wide adjust current range allow the LTC2920 to be used with most types of power supplies. The margining current is set with a single resistor channel, making it easy to design in and customize. The output current is settable over a 400:1 range and the margin voltage precision of <0.4% guarantees proper and accurate margining tests.

The LTC2920-1 is a controller for a single supply and it is offered in a space saving 5-pin SOT-23, while the LTC2920-2 has two independently controllable margining channels and comes in an 8-pin MSOP. Each channel of the LTC2920-2 has its own control pin and current setting resistor, allowing for symmetrical margining of two power supplies or asymmetrical margining of a single power while pricing starts at $1.20 each for 1,000-piece quantities.

Summary of Features: LTC2920
o Margin Voltage Precision <0.4%
o 400:1 Current Programming Range
o Symmetric/Asymmetric High and Low Voltage Margining
o Single Control Pin per Supply- High, Float, Low
o Single Current Setting Resistor per Supply
o Wide Vcc compliance 2.2 < Vcc < 6V
o Wide Output Compliance 0.6V < Vmargin < (Vcc-0.6V)
o Single in 5-Pin SOT-23 (LTC2920-1)
o Dual in 8-Pin MSOP (LTC2920-2)

COMPANY BACKGROUND: Linear Technology Corporation was founded in 1981 as a manufacturer of high performance linear integrated circuits. Linear Technology products include operational, instrumentation and audio amplifiers; voltage regulators, power management devices, DC-DC converters and voltage references; comparators; monolithic filters; communications interface circuits; one-chip data acquisition sub-systems; pulse-width modulators and sample-and-hold devices; and high frequency devices. Applications for Linear Technology's high performance circuits include wireless and broadband telecommunications infrastructure, cellular telephones, networking products and satellite systems, notebook and desk top computers, computer peripherals, video/multimedia, industrial and medical instrumentation, automotive electronics, factory automation, process control, military and space systems, and high-end consumer products including digital cameras, MP3 players and other electronic products.

For more information, contact:
Doug Dickinson, Media Relations Manager
Linear Technology Corporation
1630 McCarthy Boulevard
Milpitas, CA 95035-7417

Call toll-free 1-800-4-LINEAR (for literature only), or go to the company's web site:

Note: LT and LTC are registered trademarks and Hot Swap is a trademark of Linear Technology Corp.

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