Texas Instruments LM2575T-5.0/NOPB 1A 5V Simple Switcher

National-Semiconductor-LM2575-1A-Buck-Voltage-Regulator-Texas-Instruments-LM2575T-5-0-NOPB-P-A-monolithic-1A-step-down-buck-voltage-regulator-from-Texas-Instruments-National-Semiconductors-that-is-a-high-efficiency-replacement-for-the-more-conventional-3-pin-linear-regulators-The-device-requires-a-minimum-number-of-external-components-and-is-simple-to-use-P-P-Its-design-substantially-reduces-the-size-of-heatsink-required-and-in-many-cases-no-thermal-management-is-required-as-dissipat

Price: 3.61 from Rapid Online Rapid Electronics Ltd.