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| Lo opuesto de una formulación correcta es una formulación incorrecta. Pero lo opuesto de una verdad profunda puede ser muy bien otra verdad profunda, Niels Henrik David Bohr(1885-1962) Físico danés, premio Nobel de Física 1922. |
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| LT3437: 60V, 200kHz, 500mA (ISW) Step-Down DC/DC Converter Consumes Only 100µA Quiescent Current | |||||
MILPITAS, CA - Linear Technology Corporation announces the LT3437, a 60V (with transients up to 80V) 200kHz step-down switching regulator with quiescent current under 100µA. The LT3437 operates within a VIN range of 3.3V to 60V, making it ideal for load dump or cold-crank conditions commonly found in automotive applications. Its 500mA internal switch can deliver up to 400mA of continuous output current at voltages as low as 1.25V. The LT3437’s Burst Mode® operation offers ultra-low quiescent current, well suited for applications such as automotive or telecom systems, which demand always-on operation and optimum battery life. The combination of its 3mm x 3mm DFN package (or thermally enhanced TSSOP-16E) and 200kHz switching frequency, which keeps external inductors and capacitors small, provides a very compact, thermally efficient footprint. The LT3437 utilizes a high efficiency 500mA, 0.8 Ohm switch with the necessary oscillator, control and logic circuitry integrated into a single die. Special design techniques and a 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. Other features include external synchronization (from 240kHz to 700kHz), soft-start capability and Burst Mode defeat for low noise applications. Pricing for the LT3437EDD DFN version starts at $2.25. The LT3437IDD, which is tested and guaranteed to operate from a -40°C to 125°C operating junction temperature, is priced at $2.70 each. The LT3437EFE TSSOP-16E version pricing starts at $2.30 each. All prices are for 1,000-piece quantities and all versions are available from stock. Summary of Features: LT3437 * Wide Input Range: 3.3V to 60V * Load Dump (Input Transient) Protection to 80V * 500mA Peak Switch Current * Burst Mode Operation: 100µA Quiescent Current * Burst Mode Operation Defeat * 200kHz Switching Frequency * Saturating Switch Design: 0.8 Ohm On-Resistance * 1.25V Feedback Reference Voltage * Easily Synchronizable * Soft-Start Capability * Small 3mm x 3mm DFN-10 or Thermally Enhance TSSOP-16E Package | |||||
Viernes, 29 Julio, 2005 - 05:38 | |||||
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