JM2430

JM2430 1.4MHz, 3A Synchronous Step-Down DC/DC FEATURES High Efficiency: Up to 95% 1.4MHz Constant Frequency Operation 3A Output Current No Schottky Diode Required 2.4V to 5.5V Input Voltage Range Output Voltage as Low as 0.6V Low Quiescent Current: 40µA Slope Compensated Current Mode Control for Excellent Line and Load Transient Response Inrush Current Limit and Soft Start <1µA Shutdown Current Available in ESOP-8 package High Efficiency Conversion from 5V or 3.3 Supply Set-Top Boxes GENERAL DESCRIPTION The JM2430 is a constant frequency, current mode PWM step-down converter. The device integrates a main switch and a synchronous rectifier for high efficiency without an external Schottky diode. It is ideal for powering portable equipment that runs from a single cell Lithium-Ion (Li+) battery. The output voltage can be regulated as low as 0.6V. The JM2430 can also run at 100% duty cycle for low dropout operation, extending battery life in portable system. This device offers two operation modes, PWM control and PFM Mode switching control, which allows a high efficiency over the wider range of the load. APPLICATIONS Cable/DSL Modems Computer Peripherals Network Cards Typical Application JM2430 Figure 1. Basic Application Circuit SWICHING FREQUENCY OUTPUT VOLTAGE (V) OUTPUT CURRENT (A) Part Number Temp Range -40°C to +85°C JM2430-ADJ 1.4MHz ADJ 3 Compass Electronics Science & Technology Co.,Ltd 1 Pin Description PIN 1,6,8 2 NAME N/C...