Click here for production status of specific part numbers. MAX16543 Integrated Protection IC on a High-Power 12V Bus with an Integrated MOSFET and Lossless Current Sensing General Description Benefits and Features The MAX16543 is an integrated follower protection Used with the MAX16545B/MAX16545C to Provide IC that is used in parallel with a Maxim MAX16545B/ Integrated Protection for Loads > 60A On 12V Bus MAX16545C master integrated protection IC for distri- High Density: Industrys Smallest Circuit Breaker bution, control, monitoring and protection of a systems Solution Provides More Than 75% Board Area 12V bus. The MAX16543 increases the current capabil- Savings ity of the MAX16545B/MAX16545C. The MAX16545B/ 12-Lead QFN Package MAX16545C provide the reporting and fault protection cir- Integrated Power MOSFET with 1.5m Total cuits for the combined chipset. Up to two MAX16543s can Resistance in 12V Power Path (R , Including DS(ON) be added to a MAX16545B/MAX16545C IC to provide DC Package), Not Including Any Parallel Devices current capability of more than 60A. The 1.8V bias sup- Lossless, Precise Total System Current Sensing and ply and gate drive voltage supply of the MAX16543 are Reporting powered by the MAX16545B/MAX16545C. PMBus/SMBus Control and Reporting Through the All features of the MAX16545B/MAX16545C remain avail- MAX16545B/MAX16545C able when a MAX16543 is added to the circuit. The chip- Increases Power-Supply Reliability with IC Self- set provides monotonic startup with programmable ramp Protection Features and delay to limit inrush current during startup. The total Very Fast Fault Detection and Isolation current is monitored and reported. Programmable system V to V Short Protection During Startup IN OUT overcurrent protection is provided with several levels of Overtemperature Protection protection. Three Levels of Overcurrent Protection (OCP) The MAX16543 includes Maxims patented lossless Programmable Moderate OCP current sense to provide high accuracy current sensing Programmable Severe OCP Provides Isolation through the MAX16545B/MAX16545C IC. The MAX16543 < 5s reports its current to the MAX16545B/MAX16545C, which Fail-Safe Safe OCP Provides Isolation < 250ns then reports the total current. Modular Design, MAX16545B/MAX16545C with The MAX16543 is controlled entirely by the MAX16545B/ Single or Dual MAX16543 in Parallel Provide MAX16545C IC. The chipset input and output voltage fault Different DC Current Capabilities protection is provided by the MAX16545B/MAX16545C, MAX16545B/MAX16545C + 1 MAX16543: which enables and disables the MAX16543 as command- 90A DC Capability ed by circuit conditions and command signals. Master MAX16545B/MAX16545C + 2 MAX16543: + 1 Follower Chipset and Master + 2 Follower Chipsets 120A DC Capability show the basic application circuits for the master/fol- Systems and Applications lower chipset, with single and dual MAX16543s working Servers, Networking, Storage, Communication Equipment in tandem to provide higher current ratings than a single and AC/DC Power Supplies MAX16545B/MAX16545C. Integrated Protection IC on 12V: Circuit Breaker/ E-Fuse, Hot Swap Ordering Information appears at end of data sheet. 19-8742 Rev 3 3/19MAX16543 Integrated Protection IC on a High-Power 12V Bus with an Integrated MOSFET and Lossless Current Sensing Master + 1 Follower Chipset Master + 2 Follower Chipsets Maxim Integrated 2 www.maximintegrated.com