Product category:
Power Supply ICs and Controllers
News Release from: Fairchild Semiconductor | Subject: FDC6901L
Edited by the Electronicstalk Editorial
Team on 15 July 2003
Integrated power switch controls slew
rate
The FDC6901L is a "one-of-a-kind" power switch integrating an advanced trench technology P-channel MOSFET with a slew rate controller IC.
The FDC6901L is a "one-of-a-kind" power switch integrating an advanced trench technology P-channel mosfet with a slew rate controller IC The result is an intelligent power switch providing superior thermal and electrical performance while eliminating the need for additional packages and several passive components
This article was originally published on Electronicstalk on 28 Feb 2001 at 8.00am (UK)
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The FDC6901L is ideal as a load switch in cell phones and PDAs or when used in power management/safety applications, such as DVD players, set-top boxes and other consumer products.
The FDC6901L's advanced power-up control functionality is based on a unique design using a small control IC to drive the gate of the integrated P-channel mosfet switch with a programmable constant current source.
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This design provides a more repeatable and accurate method for controlling the turn-on characteristic of the mosfet switch, and allows system designers to avoid resets or other system fault conditions caused by supply voltage variations.
Regulated turn-on is provided to reduce inrush current and, therefore, power loss and voltage transients on the supply.
The IC on the highly efficient FDC6901L also has a strong pull-up buffer to quickly turn off the internal mosfet, as the rise time is less than 7us and can be increased to 124 or 162us.
With three programmable slew rates (600, 41 and 24V/ms), the FDC6901L can be easily programmed to drive a wide range of capacitive loads.
In addition, this flexible device can adjust the inrush current for better power management.
It also minimises EMI and offers extremely low maximum on-resistance of 180mohm.
The FDC6901L is available in a space-saving, industry-standard TSSOP-6 (SuperSOT-6) package for high-volume, surface-mount applications.
"Traditionally, power management circuit designers have been limited in flexibility when using external discrete components to optimise load switch turn-on in their applications", said Chris Winkler, Fairchild's Market Development Manager for Portable Products Applications.
"Because the new FDC6901L integrates a low-current analogue control IC with a P-channel mosfet switch, designers now have a way to achieve superior power management performance in significantly less space - and with fewer components".
In 2001, Fairchild introduced the FDG901D, the first slew rate controller IC with the ability to drive an external FET.
The introduction of the new FDC6901L advances this technology with increased functionality in a small footprint to keep pace with the industry's demanding product size and volume requirements.
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