The LM2747 is a high-precision synchronous buck controller that provides simple step-down conversion with output voltages as low as 0.6V. The device features an adjustable fixed-frequency voltage-mode PWM control architecture, with frequency adjustable from 50kHz to 1MHz with one external resistor. In addition, the LM2747 also allows the switching frequency to be synchronized to an external clock signal in the range of 250kHz to 1MHz. This wide range of switching frequency provides the power supply designer the flexibility to make better tradeoffs between component size, cost, and efficiency. Features include the ability to startup with a pre-biased load on the output, soft-start, input undervoltage lockout (UVLO) and Power Good (based on both undervoltage and overvoltage detection). In addition, the shutdown pin of the IC can be used for providing power-down.
The LM2747 is a high-speed synchronous buck regulator controller designed for down-converting voltages as low as 0.6V. It features a feedback voltage accuracy of +1% and utilizes adaptive non-overlapping MOSFET gate drivers to drive only N-channel MOS-FETs in both high-side and low-side positions.
The device supports a switching frequency adjustable from 50 kHz to 1 MHz via an external resistor, with the ability to synchronize to an external clock signal between 250 kHz and 1 MHz. Key features include pre-biased load startup, soft-start, input undervoltage lockout (UVLO), Power Good detection based on both undervoltage and overvoltage conditions, and adjustable current sensing.
| Feedback Voltage Accuracy | +1% |
|---|---|
| Minimum Output Voltage | 0.6V |
| Power Stage Input Voltage Range | 1V to 14V |
| Control Section Input Voltage Range | 3V to 6V |
| Switching Frequency Range | 50 kHz to 1 MHz |
| Package Type | TSSOP-14 |
The controller can provide down conversion to output voltages as low as 0.6V.
It is designed for driving only N-channel MOS-FETs in both high-side and low-side positions.