MC34063 Datasheet | STMicroelectronics

DESCRIPTION The MC34063A/E series is a monolithic control circuit delivering the main functions for DC-DC voltage converting. The device contains an internal temperature pensated reference, parator, duty cycle controlled oscillator with an active current limit circuit, driver and high current output switch. Output voltage is adjustable through two external resistors with a 2% reference accuracy. Employing a minimum number of external ponents the MC34063A/E devices series is designed for Step-Down, Step-Up and Voltage-Inverting applications. SO-8 BLOCK DIAGRAM March 2001 1/15 MC34063A/E ABSOLUTE MAXIMUM RATINGS Symbol V CC V ir V SWC V SWE V CE Vdc I dc I SW P tot T op Power Supply Voltage parator Input Voltage Range Switch Collector Voltage Switch Emitter Voltage (VSWC = 40V) Switch Collector to Emitter Voltage Driver Collector Voltage Driver Collector Current Switch Current Power Dissipation at Tamb = 25 o C (for Plastic Package) (for SOIC Package) Operating Ambient Temperature Range (for AC and EC SERIES) (for AB SERIES) (for EB SERIES) Storage Temperature Range Parameter Value 50 -0.3 to 40 40 40 40 40 100 1.5 1.25 0.625 0 to 70 - 40 to 85 - 40 to 125 - 40 to 150 Unit V V V V V V m A A W o o C C o C o T st g Absolute Maximum Rating are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. THERMAL DATA Symbol Parameter Max DIP-8 100 SO-8 160 Unit o R thj-amb Thermal Resistance Junction-ambient (- ) C/W (- ) This value depends from thermal design of PCB on which the device is mounted. CONNECTION DIAGRAM (top view) PIN CONNECTIONS Pin No 1 2 3 4 5 6 7 8 Symbol SWC SWE TC GND CII V CC I pk DRC Name and Function Switch Collector Switch Emitter Timing Capacitor Ground parator Inverting Input Voltage Supply Ipk Sense Voltage Driver Collector ORDERING NUMBERS Type MC34063AB (- ) MC34063AC (- ) MC34063EB MC34063EC DIP-8 MC34063ABN MC34063ACN MC34063EBN MC34063ECN SO-8 MC34063ABD MC34063ACD...