RC5035A

The RC5035A belongs to RC5035 which combines a switch-mode DC-DC converter with a low-drop-out linear regulator providing a 5V to 3.3 and 2.8V conversion for CPUs that require split power supplies. It can be configured with the proper applications circuitry to deliver load currents greater than 10 Amps. The RC5035A is designed to operate in a "constant on-time,' (patent pending) control mode under all load conditions. Its highly accurate low TC reference eliminates the need for precision external components in order to achieve tight tolerance voltage regulation. Using on-chip precision resistors, the RC5035A can generate the accurate output voltages required by Intel and Cyrix processors. The programmable oscillator can operate up tolMHz for flexibility in choosing external components such as inductors, capacitors, and Power MOSFETs. Short circuit current protection is provided on both the switch mode as well as the linear regulator.

The features of RC5035A can be summarized as (1)combines switching regulator and low dropout linear regulator in single chip; (2)enable function switches from single to dual output mode; (3)overvoltage and short circuit protection; (4)drives N-Channel MOSFETs; (5)precision trimmed low TC voltage reference; (6)soft start control during power-up; (7)88% efficiency for switching regulator.

The absolute maximum ratings of RC5035A are (1)control supply voltages, VCCA, VCCL:13V; (2)output driver supply voltage, VCCP: 13V; (3)junction temperature: +175°C; (4)storage temperature, Ts: -65 to +150°C; (5)lead soldering temperature, 10 seconds: 300 °C(note: Functional operation under any of these conditions is not implied. Performance is guaranteed only if Operating Conditions are not exceeded.)