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L6911E 数据表(PDF) 1 Page - STMicroelectronics |
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L6911E 数据表(HTML) 1 Page - STMicroelectronics |
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1 / 34 page  April 2007 Rev 3 1/34 34 L6911E 5-Bit programmable step down controller with synchronous rectification Features ■ Operating supply IC voltage from 5V to 12V buses ■ Up to 1.3A gate current capability ■ TTL-compatible 5 bit programmable output compliant with VRM 8.5 : 1.050V to 1.825V with 0.025V binary steps ■ Voltage mode PWM control ■ Excellent output accuracy: ±1% over line and temperature variations ■ Very fast load transient response: from 0% to 100% Duty Cycle ■ Power good output voltage ■ Overvoltage protection and monitor ■ Overcurrent protection realized using the upper MOSFET's Rds(ON) ■ 200kHz internal oscillator ■ Oscillator externally adjustable from 50kHz to 1MHz ■ Soft start and inhibit functions Applications ■ Power supply for advanced microprocessor core ■ Distributed power supply Description The device is a power supply controller specifically designed to provide a high performance DC/DC conversion for high current microprocessors. A precise 5 bit digital to analog converter (DAC) allows to adjust the output voltage from 1.050 to 1.825 with 25mV binary steps. The high precision internal reference assures the selected output voltage to be within ±1%. The high peak current gate drive affords to have fast switching to the external power mos providing low switching losses. The device assures a fast protection against load overcurrent and load over-voltage. An external SCR is triggered to crowbar the input supply in case of hard overvoltage. An internal crowbar is also provided turning on the low side mosfet as long as the over-voltage is detected. In case of over-current detection, the soft start capacitor is discharged an the system works in HICCUP mode. SO-20 www.st.com Table 1. Device summary Part Number Package Packaging L6911E TSSOP8 Tube L6911ETR TSSOP8 Tape and reel |
类似零件编号 - L6911E |
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类似说明 - L6911E |
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