MAX1845 Dual, High-Efficiency, Step-Down Controller With Accurate Current Limit

The MAX1845 is a dual PWM Controller configured for Step-down (buck) topologies that provides high efficiency, excellent transient response, and high DC output accuracy necessary for stepping down High-Voltage batteries to generate low-voltage chipset and RAM power supplies in notebook computers. The CS_ inputs CAN be used with low-side sense resistors to provide accurate current limits or CAN be connected to LX_, using low-side MOSFETs as current-sense elements.
The on-demand PWM Controllers are free running, constant on-time with input feed-forward. This configuration provides ultra-fast transient response, wide input-output differential range, low supply current, and tight load-regulation characteristics. The MAX1845 is simple and easy to compensate.
Single-stage buck conversion allows the MAX1845 to directly step down High-Voltage batteries for the highest possible efficiency. Alternatively, two-stage conversion (stepping down the 5V system supply instead of the battery at a higher switching frequency) allows the minimum possible physical size.
The MAX1845 is intended for generating chipset, DRAM CPU I/O, or other low-voltage supplies down to 1V. For a single-output version, refer to the MAX1844 data sheet. The MAX1845 is available in 28-pin QSOP and 36-pin thin QFN packages.
By Maxim Integrated Products
Part Manufacturer Description Datasheet Samples
MAX1745EVKIT Maxim Integrated Products Evaluation Kit for the MAX1744, MAX1745
MAX1745EUB+T Maxim Integrated Products Switching Controller, Voltage-mode, 330kHz Switching Freq-Max, PDSO10, MICRO MAX PACKAGE-10
MAX1745AUB Maxim Integrated Products Switching Controller, Voltage-mode, 330kHz Switching Freq-Max, PDSO10, MICRO MAX, MO-187CBA, MICRO SOP10
MAX1745EUB+ Maxim Integrated Products Switching Controller, Voltage-mode, 330kHz Switching Freq-Max, BICMOS, PDSO10, ROHS COMPLIANT, M0-187BA, UMAX-10
MAX1745EUB-T Maxim Integrated Products Switching Controller, Voltage-mode, 330kHz Switching Freq-Max, PDSO10, MICRO MAX, MO-187CBA, MICRO SOP10
MAX1745AUB+ Maxim Integrated Products Switching Controller, Voltage-mode, 330kHz Switching Freq-Max, BICMOS, PDSO10, ROHS COMPLIANT, M0-187BA, UMAX-10
MAX1745EUB/V+ Maxim Integrated Products Switching Controller, Voltage-mode, 330kHz Switching Freq-Max, BICMOS, PDSO10, ROHS COMPLIANT, M0-187BA, UMAX-10
MAX1745AUB+T Maxim Integrated Products Switching Controller, Voltage-mode, 330kHz Switching Freq-Max, PDSO10, MICRO MAX PACKAGE-10
MAX1745EUB Maxim Integrated Products Switching Controller, Voltage-mode, 330kHz Switching Freq-Max, PDSO10, MICRO MAX, MO-187CBA, MICRO SOP10
MAX1745AUB-T Maxim Integrated Products Switching Controller, Voltage-mode, 330kHz Switching Freq-Max, PDSO10, MICRO MAX, MO-187CBA, MICRO SOP10
MAX1745 's PackagesMAX1745 's pdf datasheet
MAX1745AUB uMAX
MAX1745AUBT uMAX
MAX1745AUB-T uMAX
MAX1745EUB-T uMAX
MAX1745EUB uMAX
MAX1745EUBT uMAX
MAX1845EEI QSOP
MAX1845EEI-T QSOP
MAX1845EEIT QSOP
MAX1845ETX QFN
MAX1845ETX-T QFN
MAX1845ETXT QFN




MAX1745 Pinout, Pinouts
MAX1745 pinout,Pin out
This is one package pinout of MAX1745,If you need more pinouts please download MAX1745's pdf datasheet.

MAX1745 Application circuits
MAX1745 circuits
This is one application circuit of MAX1745,If you need more circuits,please download MAX1745's pdf datasheet.


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