Digitally Controlled Potentiometer Occupies Just 1 mm2
The X93154 32-tap nonvolatile digitally controlled potentiometer comes in an industry-standard MSOP and a flip-chip package with a 1-mm2 footprint. The chip features a total resistance of 50 kΩ, dissipates a maximum of 1 µA in standby, and has a typical differential nonlinearity of less than ±0.2 LSB. Unit pricing in lots of 1000 starts at $0.53 for the MSOP and $0.38 for the flip chip.
Xicor Inc. www.xicor.com
Rail-To-Rail Op Amp Draws 150 µA
Though operating on less than 150 µA, the LT6011 dual rail-to-rail op amp offers an input offset voltage below 75 µV, an input bias current of less than 0.9 nA, and a noise voltage density of 14 nV/√Hz. Offered in eight-pin SOPs and 3- by 3-mm DFNs, the op amp starts at $1.95 each in lots of 1000.
Linear Technology Corp. www.linear.com
Synchronous Switching Controller Works Over Wide Input Range
The LM5642 is a two-phase synchronous switching controller that accepts a 4.5- to 36-V input voltage range. The controller operates in either a dual-output mode or in a bi-phase mode with a single output capable of twice the load current. Each output can be set to a value ranging from 1.3 to 13.5 V. The chip’s current-mode control loop can use either a discrete current-sense resistor or top-side n-channel MOSFET on-resistance sensing. Offered in a 28-pin TSSOP, the LM5642 costs $1.85 each in lots of 1000.
National Semiconductor Corp. www.national.com
Modules Convert High-Efficiency Power Chips To Quarter Bricks
The VIC-in-a-Brick format adapts the company’s V•I chips to the footprint and pinout of a standard through-hole quarter brick. This configuration is available for certain V•I Chip models, including the recently introduced 48- to 12-V Bus Converter Modules (BCMs). These produce an isolated 12 V at up to 200 W. Up to two BCMs can be accommodated in the VIC-in-a-Brick format for a total of 400 W power output. VIC-in-a-Brick modules cost as low as 13 cents/W in OEM quantities.
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