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MAX767C/D Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX767C/D Datasheet(HTML) 1 Page - Maxim Integrated Products |
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1 / 20 page  _______________General Description The MAX767 is a high-efficiency, synchronous buck controller IC dedicated to converting a fixed 5V supply into a tightly regulated 3.3V output. Two key features set this device apart from similar, low-voltage step-down switching regulators: high operating frequency and all N-channel construction in the application circuit. The 300kHz operating frequency results in very small, low- cost external surface-mount components. The inductor, at 3.3µH for 5A, is physically at least five times smaller than inductors found in competing solu- tions. All N-channel construction and synchronous rectifi- cation result in reduced cost and highest efficiency. Efficiency exceeds 90% over a wide range of loading, eliminating the need for heatsinking. Output capacitance requirements are low, reducing board space and cost. The MAX767 is a monolithic BiCMOS IC available in 20-pin SSOP packages. For other fixed output voltages and package options, please consult the factory. ________________________Applications Local 5V-to-3.3V DC-DC Conversion Microprocessor Daughterboards Power Supplies up to 10A or More ____________________________Features o >90% Efficiency o 700µA Quiescent Supply Current o 120µA Standby Supply Current o 4.5V-to-5.5V Input Range o Low-Cost Application Circuit o All N-Channel Switches o Small External Components o Tiny Shrink-Small-Outline Package (SSOP) o Predesigned Applications: Standard 5V to 3.3V DC-DC Converters up to 10A High-Accuracy Pentium P54C VR-Spec Supply o Fixed Output Voltages Available: 3.3V (Standard) 3.45V (High-Speed Pentium™) 3.6V (PowerPC™) ______________Ordering Information 5V-to-3.3V, Synchronous, Step-Down Power-Supply Controller ________________________________________________________________ Maxim Integrated Products 1 20 19 18 17 16 15 14 13 12 11 1 2 3 4 5 6 7 8 9 10 FB DH LX BST GND ON SS CS TOP VIEW MAX767 DL VCC VCC PGND REF GND GND GND N.C. GND VCC SYNC SSOP __________________Pin Configuration OUTPUT 3.3V AT 5A INPUT 4.5V TO 5.5V LX DL GND MAX767 VCC REF 3.3 µH BST DH PGND CS FB ON ________Typical Application Circuit Call toll free 1-800-998-8800 for free samples or literature. 19-0224; Rev 2; 8/94 Evaluation Kit Manual Follows Data Sheet PART TEMP. RANGE PIN- PACKAGE MAX767CAP 0°C to +70°C 20 SSOP MAX767RCAP 0°C to +70°C 20 SSOP MAX767SCAP 0°C to +70°C 20 SSOP ™ Pentium is a trademark of Intel. PowerPC is a trademark of IBM. MAX767C/D 0°C to +70°C Dice* REF. TOL. ±1.8% ±1.8% ±1.8% – Ordering Information continued at end of data sheet. * Contact factory for dice specifications. VOUT 3.3V 3.45V 3.6V – MAX767TCAP 0°C to +70°C 20 SSOP ±1.2% 3.3V |
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