MC33066P

Product Summary

The MC33066P is a high performance resonant mode controller designed for off-line and dc-to-dc converter applications that utilize frequency modulated constant on-time or constant off-time control. These integrated circuits feature a variable frequency oscillator with programmable deadtime, precision retriggerable one-shot timer, temperature compensated reference, high gain wide-bandwidth error amplifier with a precision output clamp, steering flip-flop, and dual high current totem pole outputs ideally suited for driving power MOSFETs. The device is available in dual-in-line and surface mount packages.

Parametrics

Maximum ratings: (1)Power Input Supply Voltage, VCC: 20 V; (2)Drive Output Current, Source or Sink (Note 1):Continuous: IO=0.3A; Pulsed (0.5 μs, 25% Duty Cycle): IO=1.5A; (3)Error Amplifier, Fault, One-Shot, Oscillator, and Soft-Start Inputs, Vin: -1.0 to +6.0 V; (4)UVLO Adjust Input, Vin(UVLO): -1.0 to VCC V; (5)Soft Start Discharge Current, Idchg: 20 mA; (6)Power Dissipation and Thermal Characteristics: DW Suffix Package, Case 751G, Maximum Power Dissipation @ TA = 25°C, Thermal Resistance, Junction-to-Air:PD=862mW, RθJA=145°C/W; P Suffix Package, Case 648, Maximum Power Dissipation @ TA = 25°C, Thermal Resistance, Junction-to-Air:PD=1.25w; RθJA=100°C/W; (7)Operating Junction Temperature TJ +150 °C; (8)Operating Ambient Temperature, TA: -40 to +85°C; (9)Storage Temperature Range, Tstg: -65 to +150 °C.

Features

Features: (1)Variable Frequency Oscillator with a Control Range Exceeding 1000:1; (2)Programmable Oscillator Deadtime Allows Constant Off?Time Operation; (3)Precision Retriggerable One?Shot Timer; (4)Internally Trimmed Bandgap Reference; (5)5.0 MHz Error Amplifier with Precision Output Clamp; (6)Dual High Current Totem Pole Outputs; (7)Selectable Undervoltage Lockout Thresholds with Hysteresis; (8)Enable Input; (9)Programmable Soft Start Circuitry; (10)Low Startup Current for Off?Line Operation.

Diagrams