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FAN5099EMTCX Scheda tecnica(PDF) 1 Page - Fairchild Semiconductor |
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FAN5099EMTCX Scheda tecnica(HTML) 1 Page - Fairchild Semiconductor |
1 / 24 page © 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN5099 Rev. 1.1.5 May 2008 FAN5099 — Wide Frequency Synchronous Buck PWM & LDO Controller Features ■ General Purpose PWM Regulator and LDO Controller ■ Input Voltage Range: 3V to 24V ■ Output Voltage Range: 0.8V to 15V ■ VCC – 5V – Shunt Regulator for 12V Operation ■ Support for Ceramic Cap on PWM Output ■ Programmable Current Limit for PWM Output ■ Wide Programmable Switching Frequency Range (50kHz to 600kHz) ■ RDS(ON) Current Sensing ■ Internal Synchronous Boot Diode ■ Soft-Start for both PWM and LDO ■ Multi-Fault Protection with Optional Auto-restart ■ 16-Pin TSSOP Package Applications ■ High-Efficiency (80+) Computer Power Supplies ■ PC/Server Motherboard Peripherals – VCC_MCH (1.5V), VDDQ (1.5V) and VTT_GTL (1.25V) ■ Power Supply for – FPGA, DSP, Embedded Controllers, Graphic Card Processor, and Communication Processors ■ High-Power DC-to-DC Converters Related Application Notes ■ AN-6020 FAN5099 Component Calculation and Simulation Tools ■ AN-6005 Synchronous Buck MOSFET Loss Calculations with Excel Model Description The FAN5099 combines a high-efficiency pulse-width modulated (PWM) controller and an LDO (low drop out) linear regulator controller. The PWM controller is designed to operate over a wide frequency range (50kHz to 600kHz) to accommodate a variety of applications. Synchronous rectification provides high efficiency over a wide range of load currents. Efficiency is further enhanced by using the low-side MOSFET’s RDS(ON) to sense current. In addition, the capability to operate at low switching frequencies provides opportunities to boost power supply efficiency by reducing switching losses and gain cost savings using low-cost materials, such as pow- dered iron cores, on the output inductor. Both the linear and PWM regulator soft-start are con- trolled by a single external capacitor, to limit in rush cur- rent from the supply when the regulators are first enabled. Current limit for PWM is also programmable. The FAN5099’s ability to handle wide input voltage ranges makes this controller suitable for power solutions in a wide range of applications involving conversion input voltages from Silver box, battery, and adapters. The PWM regulator employs a summing-current-mode con- trol with external compensation to achieve fast load tran- sient response and provide system design optimization. FAN5099 is offered in both industrial temperature grade (-40°C to +85°C) as well as commercial temperature grade (-10°C to +85°C). Ordering Information All standard Fairchild Semiconductor products are RoHS compliant and many are also “GREEN” or going green. For Fairchild’s definition of “green” please visit: http://www.fairchildsemi.com/company/green/rohs_green.html. Contact Fairchild sales for availability of other package options. Part Number Operating Temperature Range Package Packing Method Qty/Reel FAN5099MTCX -10°C to +85°C 16-Lead TSSOP Tape and Reel 2500 FAN5099EMTCX -40°C to +85°C 16-Lead TSSOP Tape and Reel 2500 FAN5099MX -10°C to +85°C 16-Lead SOIC Tape and Reel 2500 FAN5099EMX -40°C to +85°C 16-Lead SOIC Tape and Reel 2500 |
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