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LM1771TMM Arkusz danych(PDF) 1 Page - Texas Instruments |
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LM1771TMM Arkusz danych(HTML) 1 Page - Texas Instruments |
1 / 31 page FB VIN VIN LM1771 VOUT HG LG GND EN EN Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM1771 SNVS446D – JUNE 2006 – REVISED JANUARY 2016 LM1771 Low-Voltage Synchronous Buck Controller With Precision Enable and No External Compensation 1 Features 3 Description The LM1771 device is an efficient synchronous buck 1 • Input Voltage Range of 2.8 V to 5.5 V switching controller with a precision enable requiring • 0.8-V Reference Voltage no external compensation. The constant ON-time • Precision Enable control scheme provides a simple design free of compensation components, allowing minimal • No Compensation Required component count and board space. The precision • Constant Frequency Across Input Range enable pin allows flexibility in sequencing multiple • Low Quiescent Current of 400 µA rails and setting UVLO. The LM1771 also incorporates a unique input feedforward to maintain a • Internal Soft-Start constant frequency independent of the input voltage. • Short Circuit Protection The LM1771 is optimized for a low-voltage input • 6-Pin WSON Package and 8-Pin VSSOP Package range of 2.8 V to 5.5 V and can provide an adjustable output as low as 0.8 V. Driving an external high-side 2 Applications PFET and low-side NFET, it can provide efficiencies as high as 95%. • Simple-to-Design, High-Efficiency, Step-Down Switching Regulators Three versions of the LM1771 are available depending on the switching frequency desired for the • FPGAs, DSPs, and ASIC Power Supplies application. Nominal switching frequencies are in the • Set-Top Boxes range of 100 kHz to 1000 kHz. • Cable Modems • Printers Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) • Digital Video Recorders WSON (6) 3.00 mm × 3.00 mm • Servers LM1771 VSSOP (8) 3.00 mm × 3.00 mm • Graphic Cards (1) For all available packages, see the orderable addendum at the end of the data sheet. Typical Application Circuit 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. |
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