LM25005MHX

• Integrated 42V, 160mΩN-channel MOSFET
• 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 resistance oscillator frequency setting
• Oscillator synchronization input
• Programmable soft-start
• Power off/standby input
• Wide bandwidth error amplifier
• Thermal shutdown

illustrate

LM25005 switching regulators have all the necessary features to achieve a high efficiency, high voltage buck regulator using minimal external components. This easy-to-use regulator includes a 42V, 160mΩ, N-channel MOSFET with 2.5 amp current output capability. The regulator is controlled using an analog current ramp according to the current mode. Current-mode control provides inherent line voltage feed-forward, cycle-by-cycle current limiting, and simplified loop compensation. The sensitivity of the pulse-width modulation circuit using the analog control ramp to reduce noise allows for very small duty cycles necessary for reliable control in high input voltage applications. The operating frequency is programmable from 50kHz to 500kHz. The oscillator sync pin allows multiple LM25005 regulators to be automatically synchronized or synchronized to an external clock. Other protection features include current limiting, thermal shutdown, and remote shutdown capability. Enhanced TSSOP-20 packages are available in power equipment with an exposed die bonding pad to aid in heat dissipation.