RC5034

The RC5034 is a synchronous mode DC-DC controller IC dedicated to providing a 5V to 3.52V conversion for PentiumTM CPUs that require the 2% VRE voltage specification. It can be configured in both the synchronous and non-synchronous modes and with the proper applications circuitry can be used to deliver load current greater than 10 Amps. The RC5034 is designed to operate in a standard PWM control mode under heavy load conditions and as a PFM controller in light load conditions. Its highly accurate low TC reference eliminates the need for precision external components in order to achieve tight tolerance voltage regulation. An integrated Over-Voltage protection function constantly monitors the output voltage and shuts down the power to the CPU in the event of a out-of-tolerance voltage situation, thereby protecting the CPU. The programmable oscillator can operate from ZOOKI-Iz to greater than lMHz to provide for flexibility in choosing external components such as inductors, capacitors, and Power MOSFETs.

The features of RC5034 can be summarized as (1)pentiurnTM VREF; 2% accuracy; (2)>85% efficiency; (3)350A quiescent current in shutdown; (4)fast transient response; (5)soft control power-up; (6)over-voltage protection; (7)factory trimmed low TC reference voltage; (8)adjustable oscillator frequency; (9)drives N-Channel MOSFETs; to 1 MHZ; (10)16 pin SOIC package.

The absolute maximum ratings of RC5034 are (1)VCCP low driver supply:13 V; (2)VCCQP high driver supply: 13V; (3)TJ junction temperature: 175 °C; (4)TA ambient operating temperature : 0/70°C; (5)TS storage temperature: -65/150°C; (6)TL  lead soldering temperature (10 seconds): 300°C.(Note: 1. Functional operation under any of these conditions is NOT implied. )