A low resistance on-chip switch of 0.2ohms delivers excellent efficiency even at low input voltages. Other high voltage switchers use switches with 1 to 2V voltage drop thereby causing them to be less efficient. The LT1956 incorporates a patented slope compensation circuit to maintain 1.5A peak switch current over the entire duty cycle range. These features make the LT1956 ideal for telecommunication, industrial and automotive applications that must operate across a wide range of input voltages.
The LT1956’s topology is current mode for fast transient response and excellent loop stability. Furthermore, the LT1956 can be synchronized up to 700kHz with logic level inputs, and it features a low shutdown supply current of only 25uA. The internal control circuitry is powered directly from the output, minimizing the power drawn from the input supply. The high switching frequency allows for the use of small, low profile inductors, making this ideal for telecommunication, industrial and automotive applications.
The LT1956 incorporates all oscillator, control and protection circuitry for a complete switching regulator. The LT1956 is available in a small 16-lead SSOP package, which is significantly smaller than competitive solutions and is offered in both commercial and industrial temperature ranges. Pricing starts at $3.65 each for the commercial grade and $4.35 each for the industrial grade parts in 1,000-piece quantities.
