· High Efficiency: Up to 96%(@3.3V)
· 1.5MHz Constant Frequency Operation
· 1.2A Output Current
· No Schottky Diode Required
· 2.5V to 5.5V Input Voltage Range
· Output Voltage as Low as 0.6V
· 100% Duty Cycle in Dropout
· Low Quiescent Current: 40µA
· Slope Compensated Current Mode Control for Excellent Line and Load Transient Response
· Soft Start time for 1ms
· Short Circuit Protection with Frequency reduction mode
· Thermal Fault Protection
· Inrush Current Limit and Soft Start
· Input over voltage protection (OVP)
· <1µA Shutdown Current
· Available SOT23-5 and DFN2x2-6 Packages
The TMI3408 are 1.5MHz constant frequency, current mode step-down converters. The devices integrate a main switch and a synchronous rectifier for high efficiency without an external Schottky diode. It is ideal for powering portable equipment that runs from a single cell Lithium-Ion (Li+) battery. The output voltage can be regulated as low as 0.6V. The TMI3408 can also run at 100% duty cycle for low dropout operation, extending battery life in portable system. The devices offer two operation modes, PWM control and PFM Mode switching control, which allows a high efficiency over the wider range of the load.
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