LM2747MTC

• ± 1% feedback voltage accuracy with temperature
• Switching frequency from 50 kHz to 1 megahertz
• The switching frequency synchronization range is 250 kHz to 1 MHz
• Start and pre-bias output loads
• The power stage input voltage is from 1V to 14V
• The input voltage of the control stage is from 3V to 6V
• The output voltage can be adjusted as low as 0.6V
• Power well marked and shut down
• Outputs overvoltage and undervoltage detection
• Low-side adjustable current sensing
• Adjustable soft start
• Tracking and sequencing of shutdown and soft-start pins
• TSSOP - 14 package

illustrate

The LM2747 is a high-speed synchronous buck regulator controller with a feedback voltage accuracy ± 1%. It can provide simple downconversion output voltages as low as 0.6V. Although the control section of the IC is rated for 3 to 6V, the drive section is intended to accept up to 14V high input rails. The use of adaptive, non-overlapping MOSFET gate drivers helps avoid potential pass-through issues while maintaining high efficiency. ICs are designed to be a more cost-effective option with only N-channel MOSFETs driving high-side and low-side positions. Detection provides a simple, adjustable current limiting voltage drop for low-side switches.

The LM2747 features a fixed-frequency voltage-mode PWM control architecture, which is adjusted from 50 kHz to 1 MHz with an external resistor. In addition, the LM2747 allows for synchronization of external clock signals with a switching frequency range of 250 kHz to 1 MHz. This wide range of switching frequencies gives flexibility in power supply design with better trade-offs between component size, cost, and efficiency.

Features include load capacity start of pre-biased outputs, soft start, input undervoltage lockout (UVLO), and good power supply (based on undervoltage and overvoltage detection). In addition, the IC's shutdown pin can be used to provide a start-up delay, and a soft-start pin can be used to perform precise tracking with external rail sequencing purposes.

apply

• Downward conversion from 3.3V
• Cable modems, DSL, and ADSL
• Laser printers and inkjet printers
• Low voltage power module
• DSP, ASIC core and I/O