25V, 3.5A(IOUT), 2.4MHz Step-Down DC/DC Converter in 3mm x 3mm DFN

News Release ⎜ www.linear.com
25V, 3.5A(IOUT), 2.4MHz Step-Down DC/DC
Converter in 3mm x 3mm DFN
MILPITAS, CA – February 6, 2008 – Linear Technology Corporation announces the LT1913, a
3.5A, 25V step-down switching regulator packaged in a 3mm x 3mm DFN. The LT1913
operates within a VIN range of 3.6V to 25V, making it suitable for regulating power from a wide
variety of sources, including protected automotive batteries, industrial supplies and unregulated
wall adapters. Its 4.6A internal switch can deliver up to 3.5A of continuous output current at
voltages as low as 0.79V. The LT1913’s switching frequency is user programmable from
200kHz to 2.4MHz, enabling designers to optimize efficiency while avoiding critical
noise-sensitive frequency bands and keeping externals small. The combination of its high
switching frequency and tiny 3mm x 3mm DFN package ensure a very compact solution foot
print.
The LT1913 utilizes a high efficiency 4.6A, 95mOhm switch which can deliver up to
90% efficiency. The necessary boost diode, oscillator, control and logic circuitry are integrated
into a single chip. Special design techniques used in the LT1913 enable high efficiency over a
wide input voltage range, and the device’s current mode topology enables fast transient response
and excellent loop stability. Other features include external synchronization (from 250kHz to
2MHz), a power good flag and soft-start capability.
Pricing for the LT1913EDD starts at $3.65 each for 1,000-piece quantities. The
LT1913IDD is tested and guaranteed to operate from a -40°C to 125°C operating junction
temperature and is priced at $4.38 each in 1,000-piece quantities. Both versions are available
from stock.
25V, 3.5A(IOUT), 2.4MHz Step-Down DC/DC
Converter in 3mm x 3mm DFN
page 2
Photo Caption: 25V, 3.5A (IOUT), 2.4MHz Step-Down Switching Regulator
Summary of Features: LT1913
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Wide Input Range: 3.6V to 25V
3.5A Maximum Output Current
Adjustable Switching Frequency: 200kHz to 2.4MHz
Low Shutdown Current: IQ < 1uA
Integrated Boost Diode
Synchronizable Between 250kHz to 2MHz
Power Good Flag
Saturating Switch Design: 95mOhm On-Resistance
0.790V Feedback Reference Voltage
Output Voltage: 0.79V to 25V
Thermal Protection
Soft-Start Capability
Small 10-Pin Thermally Enhanced 3mm × 3mm DFN Package
About Linear Technology
Linear Technology Corporation, a manufacturer of high performance linear integrated circuits,
was founded in 1981, became a public company in 1986 and joined the S&P 500 index of major
public companies in 2000. Linear Technology products include high performance amplifiers,
comparators, voltage references, monolithic filters, linear regulators, DC-DC converters, battery
chargers, data converters, communications interface circuits, RF signal conditioning circuits,
uModule™ products, and many other analog functions. Applications for Linear Technology’s
high performance circuits include telecommunications, cellular telephones, networking products
such as optical switches, notebook and desktop computers, computer peripherals,
video/multimedia, industrial instrumentation, security monitoring devices, high-end consumer
products such as digital cameras and MP3 players, complex medical devices, automotive
electronics, factory automation, process control, and military and space systems. For more
information, visit www.linear.com.
LT, LTC, LTM and
are registered trademarks and uModule is a trademark of Linear Technology Corp.
Press Contacts:
John Hamburger, Director Marketing Communications
[email protected]
Tel: 408-432-1900 ext 2419
Doug Dickinson, Media Relations Manager
[email protected]
Tel: 408-432-1900 ext 2233
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