4A and 10A synchronous buck type
DC/DC converter with i/p voltage range of 4.75V to 26V
Vishay launched two new devices in the microBuck family
of integrated synchronous buck type switching regulators.
The 4-Amp SiC413 and 10-Amp SiC417 are dc-to-dc converter
solutions packing an advanced controller IC, gate drivers,
two PWM-optimized n-channel MOSFETs (high and low side),
and a bootstrap diode in a standalone buck regulator configuration.
Both the devices operate from a wide input voltage range
of 4.75 V to 26 V for the SiC413 and 3 V to 28 V for the
SiC417, with minimum output voltages down to 0.6 V and 0.5
V, respectively. The regulators minimize EMI by eliminating
PCB traces. The high- and low-side MOSFETs are of low on-resistance
type.
With a 500-KHz operating frequency, the SiC413 is optimized
for compact dc-to-dc point-of-load power supplies; 5-V,
12-V, and 24-V distributed system power systems; processor
and memory voltage regulators in set-top boxes, DVD players,
and LCD displays; and telecomm, networking, and industrial
equipment. The SiC413 comes in a 5-mm by 6-mm SO-8 package.
packed in a 5-mm by 5-mm MLPQ 32-pin package, the SiC417
is suitable for small compact battery-operated portable
computing gadgets. The constant-on-time controller provides
improved transient response. This can reduce output filter
cost for a given load regulation target. The device's ultrasonic
power save mode delivers improved light-load efficiency,
which is ideal for embedded applications in notebook, desktop,
and server computers; printers, DSL, set-top boxes, and
HDTVs; and digital consumer, networking, and telecommunications
equipment.
Working at efficiency of 93 % the SiC417 can operate with
all ceramic capacitors and works at switching frequencies
up to 1 MHz. SiC417's internal programmable LDO may be used
to supply 5 V for the gate drive circuits or it may be bypassed
with an external 5 V for optimum efficiency and used to
drive external n-channel MOSFETs or other loads.
Other key features are cycle-by-cycle current limiting,
enable pin, internal soft start, under-voltage lockout,
over-voltage protection, and thermal shutdown at +150 °C.
The SiC417 also provides the power good signal, programmable
current limit, and programmable LDO with 200 mA of drive
capability.
Availability: Now
For more details visit http://www.vishay.com.
