LM2567 Datasheet | National Semiconductor

Description The LM2567 DC DC converter is intended for use in LAN applications as a power supply for the DP8392 Coaxial Transceiver The converter may be operated from an input voltage of 5V ( g 10%) to 15V It provides an isolated output of b9V for loads of up to 180 m A with an efficiency of 78% (typical) The few external ponents required for the converter are pletely specified within this datasheet Protection features for the LM2567-based DC DC converter include thermal and current limit Undervoltage lockout and soft-start are incorporated to minimize the inrush current during start-up Features Y Y Y Y Y Y Y Wide input voltage range 5V to 15V Tight line regulation 0 5% (typ) Output voltage tolerance g 5% Few external ponents required Surface-mount packaging Fixed switching frequency of 52 k Hz Current-mode operation for improved transient response Typical Applications Power supply for DP8392 (LAN) coaxial transceiver Isolated b9V output for up to 180 m A load Typical Application DC-to-DC Converter for DP8392 Coaxial Transceiver TL H 11731 - 1 Connection Diagram and Ordering Information 24-Lead Surface Mount (M) Order Number LM2567M See NS Package Number M24B TL H 11731 - 2 No internal connection Top View C1995 National Semiconductor Corporation TL H 11731 RRD-B30M115 Printed in U S A Absolute Maximum Ratings (Note 1) If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltage Output Switch Voltage Output Switch Current Power Dissipation Storage Temperature Range 40V 50V 6 0A Internally Limited Operating Ratings Supply Voltage Output Switch Voltage Output Switch Current Junction Temperature Range Ambient Temperature Range 3 5V s VIN s 35V 0V s VSW s 45V ISW s 3 0A 0 C s TJ s a 125 C 0 C s TA s a 70 C b 65 C to a 150 C Lead Temperature (Soldering 10 sec ) 260 C Maximum Junction Temperature 150 C 2 k V Minimum ESD Rating (C e 100 p F R e 1 5 k...