AIC1562

AIC1562 High-Efficiency, Bootstrapped DC/DC Converter FEATURES 3V to 20V Input Voltage Operation. Internal 800mA Switch. Bootstrapped Driver for N-Channel MOSFET. High Efficiency (up to 90%). Fast Transient Response. Internal ±2% Reference. Low Quiescent Current at 1.6mA. Frequency Operation from 200Hz to 200KHz. DESCRIPTION The AIC1562 is a high performance monolithic DC/DC converter drive IC with outputbootstrapping capability, designed specifically for driving N-channel MOSFET to achieve maximum possible power conversion efficiency. The device consists of an internal temperature compensated reference, comparator, controlled duty cycle oscillator, bootstrapped driver and a 800mA output switch. Working with the AIC1741, a low power adjustable regulator, the AIC1562 works at 100% duty cycle under heavy load transient conditions to minimize transient response time, making it an idea precision switching power solution to stringent requirements on computer mother boards. APPLICATIONS CPU Power Supplies for Mother Boards. DC/DC Converters for CPU VRMs. Step-Down DC-DC Converter Module. TYPICAL APPLICATION CIRCUIT C3 D2 1N4148 SC BST 12V + C1 47µF R8 10K C11, C12: Ceramic Capacitor L1: Iron Powder Core VOUT= (1+R10/1K)x1.235V SE MTD20N03DH Q1 0.1µF 1N4148 2N2907A D3 R1 1K Q2 + VIN 1000 µF/6.3Vx2 C8, C9 L1 7.5µF BYV118 0.022 µF R2 24K C2 220pF C4 Z1 5V VOUT : 2.5V~3.5V/10A + 1000 µF C10 C11 C12 0.1µF 0.1µF 1000 µF/6.3V x2 x2 x5 + C13 P5 MICROPROCESSOR CPU AIC1562 TC VCC GND F...