Evaluation Engineering - 30

DC/DC CONVERTERS
DC/DC converter manufacturers are offering
a variety of devices. In addition to the product
sampling below, Renesas at Arm TechCon 2019
in October demonstrated energy harvesting
with its silicon-on-thin-buried-oxide (SOTB)
technology (www.renesas.com/SOTB). The
company's SOTB smart-farming proof-of-concept
demonstration featured an ultralow-power
SOTB R7F0E embedded controller and ultralowquiescent-current DC/DC converter to manage
energy harvested from ambient-energy sources
such as wind, light, vibration, and flow.

Quad DC/DC step-down
micromodule
Analog Devices has announced the LTM
4668A quad DC/DC step-down μModule
(micromodule) regulator with 1.2-ADC
current per output. Outputs can be paralleled
in an array for up to 4.8-A capability.
Included in the package are the switching
controllers, power FETs, inductors, and
support components. Operating over an
input voltage range of 2.7 V to 17 V, the
LTM4668A supports an output voltage range
of 0.6 V to 5.5 V. Only bulk input and output
capacitors are needed. The device supports
frequency synchronization, PolyPhase
operation, selectable Burst Mode operation,
100% duty cycle, and low IQ operation. Its
high switching frequency and a currentmode architecture enable a fast transient
response to line and load changes without
sacrificing stability. Fault-protection features
include overvoltage, overcurrent, and
overtemperature protection.

Analog Devices Inc.
30

EVALUATION ENGINEERING DECEMBER 2019

DC/DC power
module
Würth Elektronik announced that its MagI³C-VDMM (Variable
Step Down Micro Module) power module family is now
supplemented by more powerful 1-A and 1.2-A versions. The
input voltage range (from 2.5 to 5.5 V) covers the standard
3.3- and 5-V bus voltages, and the adjustable output voltage
ranges from 0.8 to 5.5 V. The modules have been designed
for high efficiency in the low-load range. Integration of the
DC/DC converter and coil makes for a compact solution in an
LGA-6EP package. The MagI³C-VDMM Series is suitable as
a replacement for linear regulators. Applications include the
supply of interfaces, microcontrollers, microprocessors, DSPs,
and FPGAs. Thanks to their small size and high efficiency
(over 96%), they are suitable for use in mobile and batterypowered devices. Würth Elektronik

Buck-boost converters
Texas Instruments has introduced a family of four high-efficiency, low-quiescent-current buckboost converters that feature tiny packaging and require minimal external components for a
small solution size. The integrated TPS63802, TPS63805, TPS63806, and TPS63810 DC/DC
noninverting buck-boost converters offer wide input and output voltage ranges that scale to
support multiple battery-driven applications. Each of the devices in the family automatically
selects buck, buck-boost, or boost mode according to the operating conditions. The devices
offer a 1.3-V to 5.5-V input and 1.8-V to 5.2-V output voltage range, which helps engineers
speed their designs and encourages reuse across multiple applications. Texas Instruments

High-isolation DC/DC converters
TRACO POWER has announced the release of the TRI
Series high-voltage DC/DC converters in five power
ranges. The 3.5-, 6-, and 10-W models feature 7,071VDC I/O isolation/9,000-VDC peak isolation up to one
second in a compact DIP-24 package. The 15- and
20-W models feature 5,940-VDC I/O isolation/8,000VDC peak isolation up to one second in a compact
2-in. x 1-in. footprint. All models feature a 1,000 VAC working voltage and common-mode
transient immunity (dv/dt) of 15 kV/µs. Each TRI Series power level consists of 15 standard
models with 9- to 18-VDC, 18- to 36-VDC, or 36- to 75-VDC input options and output
voltages of 5 V, 12 V, 15 V, ±12 V, or ±15 V (The 3.5-W models have five more models with
a 4.5-VDC to 9-VDC input range). TRACO POWER

http://www.renesas.com/SOTB http://www.rsleads.com/912ee-184 http://www.rsleads.com/912ee-185 http://www.rsleads.com/912ee-186 http://www.rsleads.com/912ee-187

Evaluation Engineering

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