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Step-down dc-to-dc synchronous regulators enable high-density PoL designs

July 06, 2010 | Paul Buckley | 222901168
Analog Devices, Inc., has introduced the ADP2119 and ADP2120 dc-to-dc switching regulators, which are the latest in ADI's portfolio of integrated power management switching regulators.

The 2 A/1.25 A, step-down, dc-to-dc synchronous regulators include low on-resistance switching FETs (field-effect transistors) that deliver power conversion efficiencies up to 93 percent. Internal loop compensation and integrated soft-start circuitry are also featured and enable high-density solutions for point-of-load applications.

The ADP2119 and ADP2120 accommodate a diversity of point-of-load applications with a 1.2-MHz fixed switching frequency and a wide 2.3-V to 5.5-V operating range. Output voltage is adjustable from 0.6 V to input voltage (VIN), and available in preset output voltage options of 3.3 V, 2.5 V, 1.8 V, 1.5 V, 1.2 V, and 1.0 V. The ADP2119 and ADP2120 regulators are available in small 3 mm x 3 mm LFCSP (lead-frame chip-scale package) packages.

"For the design engineer looking to cost effectively replace less efficient low dropout regulators, the ADP2119 and ADP2120 combined with the availability of online ADIsimPower design tools make these regulators very easy to use," said Martin Ng, product marketing manager, Analog Devices. "Our goal is to address our customers' power management challenges with products that use less space and reduce their time to market."

ADP2119 and ADP2120 dc-to-dc switching regulators features and benefits include:

  • Current-mode, fixed-frequency PWM (pulse-width modulation) architecture provides excellent stability and transient response
  • Power-good output, precision-enable and voltage tracking features enable a simple and reliable start-up sequence
  • Regulators can be synchronized to eliminate beat frequencies between converters and remove the possibility of audible system noise
  • OVP (over-voltage protection), OCP (over-current protection), UVLO (under-voltage lockout) and TSD (thermal shutdown) enhance system reliability and protection.
Availability and Pricing

The ADP2119 is available now priced at 1.27 US Dollars each per 1,000 with the ADP2120 being available now priced at 1.17 US Dollars each per 1,000.  

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