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new products
class performance.
Integrated MOSFET voltage regulator for
high-density applications reduces component
count
Infineon Technologies AG (FSE: IFX / OTCQX: IFNNY)
introduces the IR3883, an easy-to-use, fully integrated and
highly efficient DC-DC regulator. It aims at high density
Point of Load applications where high efficiency, high
reliability and good thermal behavior are required. The
device is perfectly suitable for NetCom, Telecom, Servers
and Storage solutions.The voltage regulator employs an
enhanced stability engine that makes it stable with ceramic
capacitors without compensation for an easy design.
Other solutions require extra components for stability and
for ripple injection. Thus, the IR3883 can save up to five
components and facilitates the layout for very small PCB
size of less than 100 mm².
The IR3883 provides up to 3 A continuous current from
4.5 V to 14 V in a small 3 mm x 3 mm PQFN package. It
can enter diode emulation mode during light-loads to save
power. Moreover, it can enter a low quiescent current mode
making it ideal for standby power supplies to fulfill energy
savings regulations. DCM can be disabled for applications
requiring very low ripple or to avoid interference/beat
frequency. The precise output voltage allows accurate
output voltage from 0.5 V to 5 V. A thermally compensated
internal current limit with three selectable levels overcomes
the need to oversize the inductor and saves a resistor.
This gives a more overall robustness because digital
OCSET eliminates false trips from external noise and
simplifies layout. The footprint is optimized for easy layout
as well. For example, PVIN/PGND and SW/BOOT are
adjacent for perfect bypass capacitors placement and
less noise and easier design. The IR3883 also features
all protection functions required for enterprise: pre-bias
startup, thermal shutdown, over current protection, internal
soft-start, enable pin and power GOOD output.
Availability
The DC-DC regulator IR3883 is available in high quantities,
samples can be ordered. An online design tool (Power
Desk) and a reference design IRDC3883 are available.
More information is available at www.
infineon.com/analog-ipol.
Rail-to-Rail Op Amps Feature Precision &
Power Efficiency
Linear Technology introduces the LTC6258/59/60 and
LTC6261/62/63, single/dual/quad op amps, extending its
line of power efficient, low noise, precision operational
amplifiers. These devices are part of a family of power
efficient op amps ranging from 1.3MHz GBW product at
20µA supply current to 720MHz GBW product at 3.3mA
supply current. The latest family members operate on 1.8V
to 5.25V supply, feature rail-to-rail inputs and outputs, and
include versions with shutdown mode, further reducing
power consumption during periods of inactivity. Input offset
voltage is just 400μV max. The devices are fully specified
over the industrial (I) (–40°C to 85°C) and extended (H)
(–40°C to 125°C) temperature ranges.
With supply current of only 20μA per amplifier, the
LTC6258/59/60 achieve 1.3MHz gain bandwidth product
and 240V/ms slew rate. They include input EMI filters
which provide 45dB rejection at 1GHz. They are stable for
any gain and with any capacitive load.
The LTC6261/62/63 achieve 30MHz GBW product and 7V/
μs slew rate, drawing just 240μA per amplifier. Wideband
voltage noise is just 13nV/√Hz. They are stable for any gain
and for capacitive loads up to 1nF.
Power Efficient Precision Op Amp Family Extends from
20µA, 1.3MHz to
3.3mA, 720MHz
The single LTC6258 and LTC6261 are available in a space
72 l New-Tech Magazine Europe