TMI3451

Wide Input Range Synchronous Buck Controller

数据表

TMI3451_DS_EN_V1.4

产品详细信息

特性

说明

·Wide Input Voltage Range from 4V to 36V

·Programmable VOUT Range from 0.8V to 36V

·Peak Current Mode Control

·Integrated 6V/3A Peak Gate Drive

·Adjustable Cycle-by-Cycle Current Limit by ILIM

·Adjustable Frequency: 100kHz~1MHz

·External Soft-Start Limits the Input Inrush Current

·Selectable FCCM or DCM with Pulse Skipping

·Cable Impedance Compensation

·Low Dropout Operation with Maximum Duty Cycle at 99.5%

·Input Under-Voltage Lockout

·Output OCP, SCP, OVP

·Thermal Shutdown

·QFN-20 Package, 3mm×3mm×0.75mm

The TMI3451 is a synchronous buck controller mainly for widely varying input step-down regulator applications. The control method is based upon current mode control that enables maximum performance under transient conditions. The output voltage can be programmed by the FB pin. It operates as a Buck mode while the input voltage is sufficiently greater than the regulated output voltage and transitions to the low dropout operation mode with maximum duty cycle at 99.5% as the input voltage very approaches the output voltage. It also features an adjustable soft-start function and cable impedance compensation function and offers protection features including input UVLO, cycle-by-cycle current limit, over power protection (OPP), output short protection (SCP) or OVP and thermal shutdown. In addition, it features selectable Forced Continuous Conduction Mode (FCCM) or Discontinuous Conduction Mode (DCM) operation for light load. The TMI3451 is available in compact QFN3x3-20.