ams AG (SIX: AMS), a leading provider of high performance sensors and
analog ICs, today introduced a 1A synchronous buck converter with the
wide input voltage range, high efficiency and low stand-by current
required in designs powered by a single-cell lithium-ion battery.
The new AS1382 step-down converter operates from an input range of
2.7-5.5V, and provides an output down to as little as 0.6V. Offering
efficiency as high as 96% and no-load current of just 95µA, the
converter helps designers of li-ion battery powered devices to reduce
losses in the power circuit and to extend their product’s run-time
between charges. In shut-down mode, the device draws just 0.04µA.
Housed in a miniature 1.22mm x 0.85mm six-lead chip-scale package
(WL-CSP6) with a 0.4mm pitch, the AS1382 operates at an internally fixed
frequency of 2MHz, 3MHz or 4MHz, enabling the use of a small inductor.
This means that a circuit based on the AS1382 DC-DC converter is small
enough to be accommodated in densely populated board designs, such as
those found in mobile phones, portable media players and wearable
devices.
The AS1382 is provided in variants offering a fixed output of 1.0V,
1.2V, 1.5V or 1.8V, and in a version with an output adjustable over the
range 0.61-3.35V. All support a continuous load current of 1A, and
require an output capacitor of just 10µF.
The step-down converter may be operated in one of two modes: its
Low-Ripple/Low-Noise mode produces very low levels of ripple and noise.
In High-Efficiency mode, the device has lower power losses when
supplying light loads, increasing stand-by time in always-on battery
operated solutions.
The device includes an internal synchronous switch, which eliminates the
need for an external Schottky diode.
‘The synchronous converters used in portable and battery-powered
products continue to yield opportunities for reducing power losses.
Designers who can make use of the AS1382’s 96% peak efficiency and
extremely low stand-by current will find they can gain worthwhile extra
run-time out of their product’s li-ion battery system,’ said Bernd
Krafthoefer, product marketing manager at ams AG.
The DC-DC step-down converter AS1382 is available in production volumes
now, priced at $0.21 each in quantities of 1,000 units.
An evaluation board for the AS1382 is available online from ams. For
more information and sample requests, go to www.ams.com/step-down-converter/AS1382.
Download press picture and block diagram at http://www.ams.com/eng/Press/Press-Releases/
Copyright Business Wire 2015