Texas Instruments TPS55340

Description

The TPS55340 is a monolithic non-synchronous switching regulator with integrated 5-A, 40-V power switch. It can be configured in several standardswitching-regulator topologies, including boost, SEPIC and isolated flyback. The device has a wide input voltage range to support applications with input voltage from multi-cell batteries or regulated 3.3-V, 5- V, 12-V, and 24-V power rails.The TPS55340 regulates the output voltage with current mode PWM (pulse width modulation) control, and has an internal oscillator. The switchingfrequency of PWM is set by either an external resistor or by synchronizing to an external clock signal. The user can program the switching frequency from 100 kHz to 1.2 MHz.The device features a programmable soft-start function to limit inrush current during start-up and has other built-in protection features including cycle-bycycle over current limit and thermal shutdown. The TPS55340 is available in a small 3mm x 3mm 16-pin QFN as well as 14-pin HTSSOP packages with PowerPad™ for enhanced thermal performance.The 5-A, 40-V TPS55340 Boost Converter in the HTSSOP-14 package is pin-to-pin compatible with the 3-A, 40-V TPS61175 and it extends the maximuminput voltage from 18 V to 32 V.

Features

• Internal 5-A, 40-V Low-Side MOSFET Switch
• 2.9-V to 32-V Input Voltage Range
• ±0.7% Reference Voltage 0.5mA Operating Quiescent Current
• 2.7µA Shutdown Supply Current
• Fixed Frequency Current Mode PWM Control
• Frequency Adjustable from 100kHz to 1.2MHz
• Synchronization Capability to External Clock
• Adjustable Soft-Start Time
• Pulse-Skipping for Higher Efficiency at Light Loads
• Cycle-by-Cycle Current Limit, Thermal Shutdown, and UVLO Protection
• QFN-16 (3mmx3mm) and HTSSOP-14 Packages with PowerPad™
• Wide -40°C to 150°C Operating TJ Range

Typical applications

• 3.3-V, 5-V, 12-V, 24-V Power Conversion
• Boost, SEPIC, and Flyback Topologies
• ADSL Modems
• Thunderbolt Port, Power Docking for Tablets and Portable PCs
• Industrial Power Systems

More information

• Datasheet
• IC product information