AIC2511

AIC2511 3A STEP-DOWN PWM CONVERTER FEATURES Operating Input Voltage From 4.5V to 24V 3.3V, 5V, 12V and Adjustable Output Version Adjustable Version Output Voltage Range, 1.2V to 24V ± 4% max Over Line and Load Regulation Available in TO-263-5, TO-220-5, TO-220B and TO-252-5 Package Requires Only 4 External Components. 150KHz Fixed Constant Frequency Low Power Standby Mode, IQ Typically 80µA TTL Shutdown Capability. Current Limit and Thermal Shutdown Protection. 3A Guaranteed Output Load Current APPLICATIONS Fixed Voltage power supply for LCD Monitor and LCD TV On-Card Switching regulators Simple High Efficiency Step-down regulator GENERAL DESCRIPTION The AIC2511 series are step-down monolithic PWM converters for delivering 3A at fixed voltages of 3.3V, 5.0V, 12V and using an external divider to adjust output voltage from 1.2V to 24V with excellent line and load regulation. Switching frequency up to 150KHz is achievable thus allowing smaller-sized filter components. Internal current limit and thermal shutdown circuits provide protection from overloads. The internal precise reference combined with voltage feedback loop provides optimum output voltage accuracy and fast load transient response. TYPICAL APPLICATION CIRCUIT VIN + C1 AIC2511 1 IN 2 OUT 5 ON/OFF 4 FB GND 3 L1 D1 + C2 VOUT CF R1 C1: electrolyte capacitor 470uF C2: electrolyte capacitor 220uF CF:refer to table1 D1: SK54 L1:33uH R2 R1 short, R2 and CF open for fixed version Analog Integrations Corporatio...