Synchronous Rectification Buck Regulator Regulators

Rated for 1A of output current, the NR263S synchronous rectification buck regulator ICs from Saanken Electric integrates power MOSFETs. With the current mode control, ultra low ESR capacitors such as ceramic capacitors can be used. The ICs can realize super-high efficiency by performing pulse skip operation at light load condition. The NR263S is available in an 8-pin SOP package. This device has a specified operation temperature range of -40 to +85 degrees C.

Key features and benefits include: Synchronous rectification with internal power MOSFETs; Current-mode pwm control (Normal load); Pulse skip operation (at light load); Up to 94% efficiency at normal load condition; Up to 86% efficiency at light load condition (with Vin=12V, Vout=5V, and Iout=10mA); Stable with low ESR ceramic output capacitors; Built-in protection functions include Drooping type over-current protection with auto-restart, thermal shutdown with auto-restart, under voltage lockout, and Vo short circuit protection (Hiccup); With Vo = 5V fixed and external component count reduction (NR263S); Soft-start function by external timing capacitor; and Turn ON/OF the regulator function.

The NR263S has an input voltage range of 8-Vdc to 31-Vdc and a fixed operating frequency of 500kHz. Target applications include; Refrigerators, Air conditioners, LCD-TVs, Blue-ray players, and power supplies for digital consumer devices.