San Jose, Calif.Micrel Inc. has added a member to its high power density family of products, a fully-integrated 4A synchronous buck regulator dubbed the MIC22400 for powering systems from 3.3V and 5V supply rails.
With operating frequency programmable from 800-KHz to 4-MHz, the MIC2240 features built-in sequencing, tracking and ramp control, enabling all power-up sequencing and tracking protocols.
Targeted at the communications, computing peripherals, and high-end consumer markets, the MIC22400 is suitable for servers/routers, HD DVD recorders, wireless base stations, FPGAs, DSPs, and low voltage ASICs, as well as other high power density applications.
The MIC22400 features fully integrated 60mOhm P-FET and 35mOhm N-FET switches that deliver a 4A output current with an input voltage range of 2.6-5.5V. The device has an adjustable output voltage down to 0.7V and provides efficiencies of up to 95 percent.
A proprietary, patent-pending internal compensation scheme makes the devices easy to use. The MIC22400 requires very few external components and operates at a high fixed switching frequency, which in turn, reduces the size of passive components.
The built-in sequencing/tracking feature enables reliable power up/down in multi-rail ASIC/FPGA applications. The device also offers a fast transient response, allowing the use of small output capacitors, and thermal shutdown, current limit protection and a junction operating range from -40°C to +125°C.
The IC is available in a 20-pin 4mm x 3mm MLF with a thermally-enhanced Epad TSSOP available by the end of the first quarter of 2008.
Pricing: Starts at $2.54 for 1K quantities.
Availability: Volume quantities.
Micrel Inc., www.micrel.com