Renesas Electronics Announces Low On-State Resistance Power MOSFETs for More Power Efficient and Compact Server Power Supplies

  Renesas Electronics Announces Low On-State Resistance Power MOSFETs for More
  Power Efficient and Compact Server Power Supplies

   New MOSFETs Deliver 50 Percent Lower On-Resistance Compared with Earlier
                   Renesas Products for ORing Applications

Business Wire

SANTA CLARA, Calif. -- January 24, 2013

Renesas Electronics Corporation (TSE: 6723), a premier supplier of advanced
semiconductor solutions, today announced three new low on-state resistance
[Note 1] MOSFET [Note 2] products, including the μPA2766T1A, optimized for use
as ORing [Note 3] FETs in power supply units for network servers and storage

(Photo: Business Wire)

(Photo: Business Wire)

Featuring the industry’s lowest on-state resistance of 0.72 mΩ (typical value)
for 30 V – about 50 percent lower resistance compared to Renesas’ earlier
products – and a high-efficiency, small surface mount package (8-pin HVSON),
the new products enable high-current control in a smaller package contributing
to power savings and miniaturization of the power units used for comparably
large scale server storage systems.

For mission-critical systems, it is common to provide redundant power
delivery, i.e., by ORing FET with multiple power units that maintain high
reliability for the server storages systems. These ORing FETs are connected to
the power output lines of each of the power supply units. They remain in the
on-state during normal operation, but if one of the power supply units fails,
the ORing FETs of that unit switch to the off-state in order to isolate them
from the other power supply units and ensure that the failed unit does not
disrupt system power.

During normal operation, the power output lines handle large currents of
several tens to several hundreds of amperes. The ORing FETs must have low
on-state resistance characteristics to prevent an increase in conduction loss
or a drop in the power supply voltage.

In response to this need, Renesas has developed a trio of MOSFETs based on the
company’s new low on-state resistance process. The new μPA2764T1A, μPA2765T1A
and μPA2766T1A meet this need, offering industry-leading low on-resistance in
power supply devices in smaller form factors.

Key Features of the New Low On-State Resistance Power MOSFET Products

(1) Industry’s lowest on-state resistance

The new μPA2766T1A delivers the industry’s lowest on-state resistance of 0.72
mΩ (typical value) for 30 V applications in a small 5 mm x 6 mm package and is
less than the on-state resistance of previous Renesas products by
approximately half. This contributes to improved power efficiency for the
system overall by reducing the conduction loss of the ORing FETs for power
supply units used in network servers and storage systems, which are the key
applications to contribute to the smart society. In addition, this makes it
possible to suppress large voltage drops with large currents. It is possible
to attain highly precise power supply voltage even with power supply units
having wide current fluctuations.

(2) 8-pin HVSON package with small mounting area and support for large-current

The 8-pin HVSON package provides low package resistance because a metal plate
is used to connect the FET die within the package to the pins. This, combined
with the low on-state resistance of the FET die, allows for large-current
control as much as rated 130 A (ID (DC)) in spite of the compact 5 mm × 6 mm
size of the package. It also helps to reduce equipment size by enabling the
use of the minimum number of parallel connections when multiple ORing FETs are
connected in parallel to each of the power supply units in order to supply a
large current.

The three new MOSFETs, including the μPA2766T1A, have on-state resistance
ratings ranging from 0.72 mΩ to 1.05 mΩ (standard value). This range allows
better product selection to best meet the user’s requirements in terms of
operating current or environmental conditions. It also allows customers to
supply optimal products and contributes to improved power efficiency and
reduced space requirements.

Renesas Electronics plans to further strengthen the product lineup moving
forward, and continue working to reduce on-state resistance and create even
smaller packages to meet evolving customer needs.

[Note 1] The on-state resistance is the resistance when the power MOSFET is
operating. A lower value indicates lower loss (conduction loss).

[Note 2] MOSFET is an abbreviation of “metal-oxide-semiconductor field-effect
transistor.” MOSFETs are classified as either P-channel or N-channel,
according to their structure. The new products are N-channel MOSFETs.

[Note 3] ORing refers to a configuration, in which multiple power supplies are
provided for a load, and switching between power supply voltages is performed
automatically or the load is shared among the power supplies. This is
implemented by means of power MOSFETs and a control circuit.

Pricing and Availability

Samples of the new low on-state resistance power MOSFET products are available
now. Sample pricing will vary. The sample price for the μPA2764T1A will be
US$1.20 per unit, μPA2765T1A will be US$1.00 and μPA2766T1A will be US$1.80.
Mass production of the new products is scheduled to begin in February 2013 and
is expected to reach a scale of 5,000,000 units per month for the three
products combined by October 2013. (Pricing and availability are subject to
change without notice.)


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respective owners.

About Renesas Electronics Corporation

Renesas Electronics Corporation (TSE: 6723), the world’s number one supplier
of microcontrollers, is a premier supplier of advanced semiconductor solutions
including microcontrollers, SoC solutions and a broad-range of analog and
power devices. Business operations began as Renesas Electronics in April 2010
through the integration of NEC Electronics Corporation (TSE:6723) and Renesas
Technology Corp., with operations spanning research, development, design and
manufacturing for a wide range of applications. Headquartered in Japan,
Renesas Electronics has subsidiaries in 20 countries worldwide. More
information can be found at

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