LM25005MHX

• Integrated 42V, 160mΩN channel MOSFETs
• The ultra-wide input voltage range is 7V to 42V
• Internal bias regulator
• Adjustable output voltage from 1.225V
• 1.5% feedback reference accuracy
• Current mode control and simulation of inductor current ramps
• Single-resistor oscillator frequency setting
• Oscillator synchronized input
• Programmable soft start
• Shutdown/standby input
• Wide bandwidth error amplifier
• Thermal shutdown

illustrate

LM25005 switching regulators have all the necessary features to achieve a high-efficiency, high-voltage step-down regulator uses minimal external components. This easy-to-use regulator includes a 42V, 160mΩ, N-channel MOSFET with a 2.5 amp current output capability. The regulator is controlled by using a simulated current ramp control based on the current pattern. Current mode control provides inherent line voltage feedforward, cycle-by-cycle current limiting, and simplified loop compensation. The sensitivity of the pulse-width modulation circuit to reduce noise using an emulation control ramp allows for very small duty cycles necessary for reliable control in high input voltage applications. Programmable operating frequency from 50kHz to 500kHz. The oscillator sync pin allows multiple LM25005 regulators to automatically synchronize operation or synchronize to an external clock. Other protection features include current limiting, thermal shutdown, and remote shutdown capabilities. The enhanced TSSOP-20 package is available in power devices with an exposed chip bonding pad to help dissipate heat.