MAX1887, MAX1897 Quick-PWM Slave Controllers For Multiphase, Step-Down Supplies

The MAX1887 MAX1897 Step-down slave controllers are intended for low-voltage, high-current, multiphase DC-to-DC applications. The MAX1887 MAX1897 slave controllers CAN be combined with any of Maxim's Quick-PWM" Step-down controllers to form a multiphase DC-to-DC converter. Existing Quick-PWM controllers, such as the MAX1718 function as the master controller, providing accurate output voltage regulation, fast transient response, and fault protection features. Synchronized to the master's low-side Gate driver, the MAX1887 MAX1897 include the Quick-PWM constant on-time controller, Gate drivers for a synchronous Rectifier active current balancing, and precision current-limit circuitry.
The MAX1887 MAX1897 provide the same high efficiency, ultra-low duty factor capability, and excellent transient response as other Quick-PWM controllers. The MAX1887 MAX1897 differentially sense the inductor currents of both the master and the slave across current-sense resistors. These differential inputs and the adjustable current-limit threshold derived from an external reference allow the slave controller to accurately balance the inductor currents and provide precise current-limit protection. The MAX1887 MAX1897 's dual-purpose current-limit input also allows the slave controller to automatically enter a low-power standby mode when the master controller shuts down.
The MAX1887 triggers on the rising edge of the master's low-side Gate driver, which staggers the on-times of both master and slave, providing out-of-phase operation that CAN reduce the input ripple current and consequently the number of input capacitors. The MAX1897 features a selectable trigger polarity, allowing out-of-phase or simultaneous in-phase operation.
By Maxim Integrated Products
MAX1897 's PackagesMAX1897 's pdf datasheet
MAX1897EGP QFN
MAX1897EGP-T QFN
MAX1897ETP QFN
MAX1897ETP-T QFN
MAX1897ETPT QFN




MAX1897 Pinout, Pinouts
MAX1897 pinout,Pin out
This is one package pinout of MAX1897,If you need more pinouts please download MAX1897's pdf datasheet.

MAX1897 Application circuits
MAX1897 circuits
This is one application circuit of MAX1897,If you need more circuits,please download MAX1897's pdf datasheet.


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