ML34063

ML34063 DC/DC CONVERTER CONTROL CIRCUIT GENERAL DESCRIPTION The ML34063 is a monolithic control circuit containing the primary functions required for DC/DC converters. The device consists of an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active current limit circuit, driver and high current output switch. This device is specifically designed to be incorporated in step-down, step-up and voltage-inverting applications with a minimum number of external components. The ±2% internal reference and low quiescent current of 1.6mA are among the improvements of the device over the competition FEATURES ‹ 3V to 40V Input Voltage Operation. ‹ Internal 1.5A Peak Current Switch. ‹ Internal ±2% Reference. ‹ Low Quiescent Current . ‹ Frequency Operation Up to 100KHz. ‹ Low Dropout Operation: 100% Duty Cycle ‹ Current Limiting. ‹ Standard DIP8 and SOP8 Packages Applications ‹ DC-DC Converter Module ‹ ADSL Modems ‹ Hub. ‹ Battery Chargers Functional Diagram Ver1.0 1 Pin Description ML34063 Symbol Pin NO. Description SC SE TC GND FB 1 1.5A switch collector 2 Darlington switch emitter 3 Oscillator timing capacitor 4 Power GND 5 Feedback comparator inverting input VCC 6 Power supply input IPK 7 Highside current sense input, VCC - VIPK=300mV DRI 8 Drive collector Ordering Information ORDERI NG NUM BER ML34063 ML34063A PACKAGE SOP8 DIP8 Absolute Maximum Ratings Supply Voltage ……………….……………………. ………………………………… ……40V Comparator Input...