SD45215

SD45215_Datasheet HIGH EFFICIENCY STEP-DOWN DC/DC CONVERTER WITH ADJUSTABLE CURRENT LIMIT FOR AUTOMOTIVE APPLICATIONS DESCRIPTION The SD45215 is a high efficiency step down DC-DC converter with adjustable current limit in compact SOP-8 package, including an error amplifier, ramp generator, current comparator, slope compensation, current sense and logic driver. It also integrates a current error amplifier to have a constant voltage and constant current control. Peak current mode PWM control with external adjustable SOP-8-225-1.27 compensation provides a stable and high efficient operation over a wide range of load currents. By means of an on board current sense resistor and the availability of the current sense pins, a current limit programming is very simple and accurate. The internal robust PMOS transistor with a typical of 150 mΩ assures high efficiency even at high output current level. The internal limiting current of typical value of 3 A, output short and over temperature protection, protect the device from accidental damage. APPLICATIONS The internal fixed switching frequency of 120 kHz, and the SOP-8 * Automotive applications package pin allow building an ultra compact DC/ DC converter with a * Chargers for NiCd, NiMH batteries minimum board space. * Simple step-down converters with adjustable current limit * Adjustable current generator FEATURES * Up to 1.5A output current * Up to 90% Efficiency * Input Voltage Range: 8V to 30V * 120 kHz Internal Jitter Frequency...