Austin, Tex. Freescale Semiconductor has added the MC34726/27 dc/dc buck regulators to its analog portfolio optimized for space-constrained battery-powered applications. Manufactured with Freescale's SMARTMOS technology, the MC34726/27 devices are designed to enhance efficiencies at light loads and to improve standby time in mobile applications where Li-ion or Li-polymer batteries are the main power source.
Using Freescale's Z-mode architecture during light output activities such as cell phone standby, the MC34726/27 buck regulators smoothly transition into a pulse skipping mode, reducing the switching frequency to improve power efficiency and provide long battery life, Freescale said. The Z-mode architecture is engineered to improve ripple performance during light load currents, while maintaining a low quiescent current.
The MC34726/27 buck regulators offer a 300 mA or 600 mA load current and single input voltage rail between 2.7 V and 5.5 V. The devices provide 0.7% ripple at full load; 1% ripple at light load (Z-mode architecture). The factory preset output voltage range is 0.8 V to 3.3 V.
Housed in a 2 x 2 x 0.65-mm package and offered with high operating frequency, the devices are intended for applications with tight board space requirements and single-cell Li-ion-based applications such as cell phones, PMP and MP3 players.
Pricing: Suggested resale pricing for the MC34726 is $0.51 (USD), and the MC34727 is $0.53 (USD), in quantities of 10,000.
Availability: Samples are available now.
Product information: power management ICs, MC34726 and MC34727
Freescale Semiconductor, Inc., www.freescale.com