Date: 25/06/2010
Buck type DC/DC converters for laptops, PDAs
austriamicrosystems has introduced the AS1346/47/48/49, buck type DC-DC converter ICs. This family is suggested for space-limited applications with low power consumption requirements. The new AS134x series provides small size and high efficiency of up to 95%. These converters are targeted for portable devices such as laptops, PDAs, mobile internet devices and solid state drives (SSDs).
The AS1346/47/48/49 DC-DC series are available with fixed-voltage versions in 100 mV increments from 1.2 V to 3.6 V. Each version provides two independent DC-DC regulators with output currents between 0.5 A and 1.2 A (see table below). The two channels operate 180 degrees out-of-phase to reduce input voltage ripple and minimize input capacitor requirements. The devices operate over an input voltage range of 2.7 V to 5.5 V and feature an automatic power-save mode, and, with internal MOSFETs, few external components are required. This series is suitable for SSDs and many other battery-powered products. This series also features a shutdown mode where the supply current decreases to less than 1 µA. It also has a highly efficient duty cycle provides low dropout operation, prolonging battery life in portable systems, while an internal synchronous switching scheme increases efficiency and eliminates the need for an external Schottky diode. These converters have an internally fixed switching frequency of 2.0 MHz.
Peter Kammerlander, austriamicrosystems' Senior Product Manager, stated, "Today's battery powered devices offer more features and higher performance, placing increasing demands on power management and efficiency. The AS134x series not only meets the demands of consumer electronics, but also for other applications such as ultra-low-power systems, solid state drives, medical instruments, as well as telemetry and remote systems."
Part Number Iout1 Iout2
AS1346 1.2 A 0.5 A
AS1347 0.5 A 0.5 A
AS1348 0.5 A 0.95 A
AS1349 1.2 A 1.2A
Package: 12-pin TDFN 3x3 mm package
Operating temperature range: -40 to +85°C.
Price & Availability
Available now, prices for the AS134x family start at $0.90 in 1000-piece quantities.
For more information visit: www.austriamicrosystems.com/DC-DC