IR3640MPBF
HIGH FREQUENCY SYNCHRONOUS PWM BUCK CONTROLLER
Features
4.5V to 5.5V external supply Wide Input voltage from 1.5V to 24V Output voltage range: 0.7V to 0.9*Vin Programmable switching frequency up to 1.5MHz Programmable Soft-start Hiccup mode over current protection using Rds(on) sensing Programmable OCP Reference voltage 0.7V (+/-1%, 0oC
The IR3640M is a synchronous Buck PWM controller designed for performance The single demanding loop voltage DC/DC mode applications.
architecture simplifies design while delivery precise output voltage regulation and fast transient response. Because of its wide input and output voltage range it can be used in a large variety of point of load applications within a system and across different markets. The part is designed to drive a pair of N-Channel MOSFETs from 250kHz to 1.5Mhz switching frequency giving designers the flexibility to optimize the solution for best efficiency or smallest footprint. The output voltage can be precisely regulated from as low as 0.7V within a tolerance of +/-1% over temperature, line and load variations. The device also integrates a diversity of features including; programmable soft start, pre-bias start up, voltage tracking, external synchronization, enable input and Power Good output. Fault protection features include thermal shutdown, over voltage and over current shutdown and under voltage lock out.
Applications
Typical Application
06/15/2009
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IR3640MPBF