LM34914SD

• Product Introduction

peculiarity

8V to 40V input voltage range: Integrated N-channel buck switch The valley current is limited with V IN and V OUT to reduce excessive inductor current Reduced time on current limit Integrated starting voltage regulator No loop compensation is required Ultra-fast transient response Maximum switching frequency: 1.3 MHz The operating frequency remains virtually constant, with changes in load current and input voltage Programmable soft start Precision internal reference Adjustable output voltage Thermal shutdown

illustrate

LM34914 buck switching regulators have all the features needed to achieve a low-cost, high-efficiency, buck-bias regulator capable of delivering at least 1.25A load. In order to reduce excessive switching current, the time to switch due to the possibility of saturation inductance due to the trough current limit with changes in input and output voltage thresholds and when a current limit is detected, the time on is reduced. This buck regulator contains a 44V N-channel buck switch in a thermally enhanced 3 mm x 3 mm LLP-10 package. The feedback regulation mechanism requires no loop compensation, fast load transient response, results, and simplified circuit implementation. Changes in operating frequency, line and load, due to the inverse relationship between input voltage and time, remain constant. From constant voltage and constant current mode, when current is detected in a valley current limiting result in a smooth transition, frequency and output voltage are reduced without the use of foldback. Other features include: VCC undervoltage lockout, overheat shutdown, gate drive at lock voltage, maximum duty cycle limit.