CA1523 Datasheet | Intersil

Features - Operates up to 200k Hz - Pins ESD Protected - Remote ON/OFF - Slow Start with Reset - Overcurrent Sensing - Lower Peak Currents than PWM Regulator - Less Prone to Magnetic Saturation Description The CA1523 monolithic silicon integrated circuit is a variable interval pulse regulator designed to provide the control circuitry for use in switching regulator circuits. It operates from 11V to 15V. The regulator provides a single output drive capable of 300m A source/200m A sink. The maximum operating frequency is better than 200k Hz. An attractive feature of the CA1523 is that the timing capacitor charge and discharge current is set up externally via a single resistor. The ratio of charge to discharge current is internally set at a maximum of 2 to 1 allowing simultaneous change in output pulse width with increased frequency at higher load. The pulse width variation at higher frequencies effectively pensates for the losses in magnetics and thereby increases the power supply efficiency at higher load end by as much as 20 percent. Part Number Information PART NUMBER CA1523E TEMPERATURE RANGE 0o C to +70o C PACKAGE 14 Lead Plastic DIP Pinout CA1523 (PDIP) TOP VIEW ERROR CURRENT SENSE GND RISE TIME OUTPUT GND OUTPUT VCC 1 2 3 4 5 6 7 14 TIMING 13 ZENER 12 ON/OFF 11 OVER CURRENT 10 SLOW START 9 8 LOGIC OUTPUT NC CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright © Intersil Americas Inc. 2002. All Rights Reserved 1 File Number Specifications CA1523 Absolute Maximum Ratings DC Supply Voltage - - - - - - - 15V Supply Current |6(MAX) - - - - - - - - - . ±50m A |6(MAX), 1µs,1800p F Load - - - - +300, -200m A Device Dissipation Up to TA = 70o C...