DC/DC Switching Regulators

The Silergy SY7200A is a DC/DC step-up (boost) LED driver IC that delivers accurate, regulated constant current for driving series-connected LED strings — making it ideal for compact backlight and general LED lighting designs in portable and consumer electronics. Operating from a wide input voltage range of 2.8V to 30V, the SY7200A switches at a fixed frequency of 1MHz, enabling the use of small-value ceramic capacitors and inductors that minimise PCB footprint and BOM cost. It supports EN/PWM dimming input frequencies from 20kHz to 1MHz for flicker-free brightness control, and can drive up to eight white LEDs in series with output voltage up to 30V, with LED current set accurately by a single external resistor. The device operates across -40°C to 85°C and is RoHS compliant and halogen-free. ABL Semi supplies the SY7200A as a 100% authentic Silergy product in SOT-23-6 with flexible MOQ and pin-to-pin compatibility to comparable boost LED drivers.

The UMW LM2596 is a 150kHz fixed-frequency PWM step-down (buck) switching regulator IC providing all the active functions needed to build a complete, high-efficiency buck converter capable of delivering a guaranteed 3A continuous output current with excellent line and load regulation of ±4% maximum. Available in fixed output voltage versions of 3.3V, 5V, and 12V, plus an adjustable (ADJ) version covering 1.2V to 37V (57V for the HV variant), the LM2596 requires only 4 external components and integrates internal frequency compensation and a fixed-frequency oscillator — eliminating external compensation design. A low-power standby mode draws just 80µA, and TTL-compatible shutdown, thermal protection, and current limiting are all built in. The UMW LM2596 is available in TO-220, TO-220B, and TO-263 packages. ABL Semi supplies it as a 100% authentic UMW product with flexible MOQ and pin-to-pin compatibility to the TI LM2596 series.

The UMW XL1509 is a 150kHz fixed-frequency PWM buck (step-down) DC/DC converter IC capable of delivering 2A continuous output current with high efficiency, low output ripple, and excellent line and load regulation across a wide input voltage range of up to 45V. Available in fixed output versions of 3.3V, 5V, and 12V as well as an adjustable (ADJ) version, the XL1509 integrates internal frequency compensation, a fixed-frequency oscillator, and an enable function — minimising external component count and simplifying PCB design significantly. A built-in two-stage overcurrent protection reduces switching frequency from 150kHz to 50kHz under sustained overload conditions, protecting the converter and downstream load. The PWM duty ratio is adjustable from 0% to 100%. ABL Semi supplies the UMW XL1509 in SOP-8 and ESOP-8 packages with flexible MOQ and pin-to-pin compatibility to the XL4005 and LM2596 buck regulator series.