Dual Synchronous Buck Regulator Controller

The LM2657 is an adjustable 200kHz-500kHz dual channel voltage-mode controlled high-speed synchronous buck Regulator controller ideally suited for high current applications. The LM2657 requires only N-channel FETs for both the upper and lower positions of each stage. It features line feedforward to improve the response to input transients. At very light loads, the user CAN choose between the high-efficiency Pulse-skip mode or the constant frequency Forced-PWM mode. Lossless current limiting without the use of external sense resistors is made possible by sensing the voltage drop across the bottom FET A unique adaptive duty cycle clamping technique is incorporated to significantly reduce peak currents under abnormal load conditions. The two independently programmable outputs Switch 180 out of phase (interleaved switching) reducing the input capacitor and Filter requirements. The input voltage range is 4.5V to 28V while the output voltages are adjustable down to 0.6V.
Standard supervisory and control features include Soft-start, Power Good, output Under-voltage and Over-voltage protection, Under-voltage Lockout, and chip Enable.
By National Semiconductor Corporation
Part Manufacturer Description Datasheet Samples
LM2657MTC/NOPB Texas Instruments Dual Synchronous Buck Regulator Controller 28-TSSOP -40 to 125
LM2657MTC Texas Instruments DUAL SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDSO28, TSSOP-28
LM2657MTCX Texas Instruments DUAL SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDSO28, TSSOP-28
LM2657MTCX/NOPB Texas Instruments Dual Synchronous Buck Regulator Controller 28-TSSOP -40 to 125
LM2657 's PackagesLM2657 's pdf datasheet
LM2657MTC TSSOP
LM2657MTCX TSSOP




LM2657 Pinout, Pinouts
LM2657 pinout,Pin out
This is one package pinout of LM2657,If you need more pinouts please download LM2657's pdf datasheet.

LM2657 Application circuits
LM2657 circuits
This is one application circuit of LM2657,If you need more circuits,please download LM2657's pdf datasheet.


Related Electronics Part Number

Related Keywords:

LM2657 Pb-Free LM2657 Cross Reference LM2657 Schematic LM2657 Distributor
LM2657 Application Notes LM2657 RoHS LM2657 Circuits LM2657 footprint