High-Efficiency Buck Converters from Diodes Incorporated Provide Wide-Ranging POL Design Versatility
April 20 2023 - 10:14AM
Business Wire
Diodes Incorporated (Diodes) (Nasdaq: DIOD) has announced new
additions to its synchronous buck converter portfolio. With
continuous output current ratings of 5A and 8A respectively, the
AP62500 and AP62800 offer the flexibility engineers need to develop
point-of-load (POL) solutions that are optimized for either
efficiency or size. Enabling compact implementations with minimal
component count, these devices are targeted at use in mass-market
consumer products, such as 5V and 12V distributed power bus
supplies, television sets and monitors, white goods and small home
appliances, FPGA, DSP, and ASIC supplies, home audio, network
systems, gaming consoles, consumer electronics, and general purpose
point of loads.
Both buck converters have wide input voltage ranges—with the
AP62500 covering 4.5V to 18V, and the AP62800 covering 4.5V to 17V
(making both suitable for 5V and 12V rail applications). Their
output voltages can be adjusted down to 0.6V. Three different
switching frequencies may be selected (400kHz, 800kHz, and 1.2MHz),
allowing engineers to prioritize elevated conversion efficiency or
focus on having a compact form factor. In addition, the devices
have three selectable operating modes; pulse frequency modulation
(PFM) for improved light-load efficiency, pulse width modulation
(PWM) for reduced output voltage ripple, and ultrasonic (USM) for
avoiding audible frequency range while ensuring the switching
frequency stays above 20kHz.
On-resistance (RDS(ON)) figures are kept low in relation to both
the high-side MOSFET (47mΩ for AP62500; 22mΩ for AP62800) and
low-side MOSFET (18mΩ for AP62500; 10mΩ for AP62800). This helps to
improve step-down conversion efficiency levels. An ultra-low
quiescent current (IQ) is also achieved while in PFM mode (195μA
typical), further enhancing light-load efficiencies.
The design of these buck converters minimizes electromagnetic
interference (EMI) issues. A proprietary gate-driver design
mitigates switching-node ringing without having to extend MOSFET
turn-on/turn-off times, which would otherwise impact high-frequency
switching capabilities. Constant on-time (COT) control results in
fast transient response and low-output voltage ripple, as well as
facilitates better loop stabilization. Soft-start time
adjustability is another important feature to protect against the
risk of damage from inrush currents.
In 1,000 piece quantities, the AP62500 is available at $0.325
and the AP62800 is available at $0.570. They are both supplied in
12-pin V-QFN2030 packages.
About Diodes Incorporated
Diodes Incorporated (Nasdaq: DIOD), a Standard and Poor’s
SmallCap 600 and Russell 3000 Index company, delivers high-quality
semiconductor products to the world’s leading companies in the
automotive, industrial, computing, consumer electronics, and
communications markets. We leverage our expanded product portfolio
of discrete, analog, and mixed-signal products and leading-edge
packaging technology to meet customers’ needs. Our broad range of
application-specific solutions and solutions-focused sales, coupled
with worldwide operations of 32 sites, including engineering,
testing, manufacturing, and customer service, enables us to be a
premier provider for high-volume, high-growth markets. For more
information visit www.diodes.com.
The Diodes logo is a registered trademark of Diodes Incorporated
in the United States and other countries.
All other trademarks are the property of their respective
owners.
© 2023 Diodes Incorporated. All Rights Reserved
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