TI Buck-Boost DC-DC Converter Widens Input Voltage Range for Automotive Applications
Texas Instruments Inc. (TI) introduced an automotive-qualified dc-dc power management integrated circuit (IC) that switches autonomously between buck and boost modes to provide a constant regulated output voltage of 5V. The TPIC74100-Q1 operates over a wide input voltage range of 1.5 to 40V and simplifies design by eliminating the need for external components. The device also minimizes electro-magnetic interference (EMI) in the system by implementing a clock modulator and adjustable slew rate.
Additional key features include the following: switch-mode regulator - 5V +/- 2%, normal mode - 5V +/- 3%, low-power or crossover mode; switching frequency of 440kHz (typical) is outside of the AM frequency band; input operating range, 1.5 to 40V, (Vdriver) - 1A Load-Current Capability - 200mA Load-Current Capability Down to 2V Input (Vdriver) - 120mA Load-Current Capability Down to 1.5V Input (Vdriver); disable and low-power operation modes to optimize power savings; reset function with deglitch timer and programmable delay provides increased reliability in the system; programmable alarm function for undervoltage detection and indication; and a thermally-enhanced package for efficient heat management.
The TPIC74100-Q1 voltage regulators are available now in volume in a 20-pin HTSSOP PowerPADTM package. Suggested resale pricing in quantities of 1,000 units is $1.70.
