Switching Regulator delivers 3 A peak current.
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Press Release Summary:
Model LT3431 high voltage, constant frequency, step-down switching regulator utilizes 3 A internal switch. It operates with inputs from 5.5-60 V and can deliver up to 2.75 A of continuous output current at voltages as low as 1.25 V. Regulator utilizes constant 500 kHz switching frequency, keeping external components small. Sync pin allows for external synchronization from 580-700 kHz with logic level inputs. Thermally enhanced TSSOP package optimizes heat dissipation.
Original Press Release:
High Input Voltage Step-Down Switching Regulator Delivers 3A Peak Current in Very Small Footprint
MILPITAS, CA - May 5. 2003 - Linear Technology announces the LT3431, a high voltage constant frequency step-down switching regulator that utilizes a 3A internal switch. The LT3431 can operate within a VIN range of 5.5V to 60V and can deliver up to 2.75A of continuous output current at voltages as low as 1.25V, which makes it ideal for telecom, automotive and industrial applications. Its unique high voltage architecture enables efficiencies as high as 90% even in low duty cycle applications. The LT34301 utilizes a constant 500kHz switching frequency keeping external components small. A sync pin allows for external synchronization from 580kHz to 700kHz with logic level inputs. It comes in a thermally enhanced TSSOP package that optimizes heat dissipation within a very small, low profile circuit footprint.
The LT3431 utilizes a high efficiency 3A, 0.1Ohm switch, with the necessary oscillator, control and logic circuitry integrated into a single die. Special design techniques and a new high voltage process enable high efficiency over a wide input voltage range while its current mode topology enables fast transient response and excellent loop stability. Patented circuitry maintains peak switch current over the entire duty cycle range. Supply current is only 2.5mA during normal operation, while shutdown current is reduced to 30uA.
The LT3431EFE is available from stock, pricing starts at $4.95 in 1,000-piece quantities.
Summary of Features: LT3431
o Wide Input Voltage Range: 5.5V to 60V
o 3A Peak Switch Current
o Constant 500kHz Switching Frequency
o Effective Supply Current: 2.5mA
o Low Shutdown Current: 30uA
o Easily Synchronizable
o TSSOP-16E Thermally Enhanced Package
o Cycle-by-Cycle Current Limiting
COMPANY BACKGROUND: Linear Technology Corporation was founded in 1981 as a manufacturer of high performance linear integrated circuits. Linear Technology products include operational, instrumentation and audio amplifiers; voltage regulators, power management devices, DC-DC converters and voltage references; comparators; monolithic filters; communications interface circuits; one-chip data acquisition sub-systems; pulse-width modulators and sample-and-hold devices; and high frequency devices. Applications for Linear Technology's high performance circuits include wireless and broadband telecommunications infrastructure, cellular telephones, networking products and satellite systems, notebook and desk top computers, computer peripherals, video/multimedia, industrial and medical instrumentation, automotive electronics, factory automation, process control, military and space systems, and high-end consumer products including digital cameras, MP3 players and other electronic products.
For more information, contact:
Doug Dickinson, Media Relations Manager
Linear Technology Corporation
1630 McCarthy Boulevard
Milpitas, CA 95035-7417
ddickinson@linear.com
408-432-1900
READER SERVICE: Call toll-free 1-800-4-LINEAR (for literature only), or go to the company's web site: www.linear.com
Note: LT LTC are registered trademarks of Linear Technology Corp.
