LTC Offers LT1766EFE/LT1956EFE Regulators

Linear Technology Corp. (LTC, Milpitas, CA) announced the LT1766EFE and LT1956EFE, two constant frequency, step-down, switching regulators that include a 1.5A internal switch. Both switching regulators operate within a VIN range of 5.5V to 60V, and can deliver up to 1.25A of continuous output current at voltages as low as 1.25V. The LT1766EFE utilizes a 200kHz switching frequency, while the LT1956EFE switches at a frequency of 500kHz. Both devices are packaged in a thermally enhanced TSSOP package to keep the overall solution footprint small while providing optimum thermal resistance.

Both the LT1766 and LT1956 family utilize a high-efficiency, 1.5A, 0.2Ohm switch, with an oscillator and control and logic circuitry integrated into a single die. Special design techniques and a new high-voltage process enable high efficiency over a wide input-voltage range, while the current-mode topology enables fast transient response and loop stability. Proprietary circuitry maintains a peak switch current over the entire duty cycle range. The supply current is only 2.5mA, while the shutdown current is reduced to 25µA.

The LT1766 is available in both E and I temperature grades, and each can be purchased with a fixed 5V or an adjustable output. Both of the LT1766EFE versions are available from stock, and pricing starts at $3.75 each in 1,000-piece quantities. Similarly, both I-grade versions, the LT1766IF and LT1766IFE-5, are available from stock, and pricing starts at $4.45 in 1,000-piece quantities.

The LT1956 is also available in both E and I temperature grades. Each can be purchased with a fixed 5V or an adjustable output. Both of the LT1956EFE versions are available from stock, and pricing starts at $3.75 each in 1,000-piece quantities. Similarly, both I-grade versions, the LT1956IFE and LT1956IFE-5, are available from stock. Pricing starts at $4.45 each in 1,000-piece quantities.