MC34025, MC33025 High Speed Double-Ended PWM Controller The MC34025 series are high speed, fixed frequency, doubleended pulse width modulator controllers optimized for high frequency operation. They are specifically designed for Off Line and DC to DC converter applications offering the designer a cost effective solution with minimal external components. These MC34025, MC33025 MAXIMUM RATINGS Rating Symbol Value Unit Power Supply Voltage V 30 V CC Output Driver Supply Voltage V 25 V C Output Current, Source or Sink (Note 1) I A O DC 0.5 Pulsed (0.5 s) 2.0 Current Sense, SoftStart, Ramp, and Error Amp Inputs V 0.3 to +7.0 V in Error Amp Output and SoftStart Sink Current I 10 mA O Clock and R Output Current I 5.0 mA T CO Power Dissipation and Thermal Characteristics SO16 Package (Case 751G) Maximum Power Dissipation T = +25C P 862 mW A D Thermal Resistance, JunctiontoAir R 145 C/W JA DIP Package (Case 648) Maximum Power Dissipation T = +25C P 1.25 W A D Thermal Resistance, JunctiontoAir 100 C/W R JA Operating Junction Temperature T +150 C J Operating Ambient Temperature (Note 2) C MC34025 T 0 to +70 A MC33025 40 to +105 Storage Temperature Range T 55 to +150 C stg Human Body Model ESD Capability per JEDEC JESD22A114F HBM 2000 V Machine Model ESD Capability per JEDEC JESD22A115C MM 200 V Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. ELECTRICAL CHARACTERISTICS (V = 15 V, R = 3.65 k , C = 1.0 nF, for typical values T = +25C, for min/max values T CC T T A A is the operating ambient temperature range that applies Note 2 , unless otherwise noted.) Characteristic Symbol Min Typ Max Unit REFERENCE SECTION Reference Output Voltage (I = 1.0 mA, T = +25C) V 5.05 5.1 5.15 V O J ref Line Regulation (V = 10 V to 30 V) Reg 2.0 15 mV CC line Load Regulation (I = 1.0 mA to 10 mA) Reg 2.0 15 mV O load Temperature Stability T 0.2 mV/C S Total Output Variation over Line, Load, and Temperature V 4.95 5.25 V ref Output Noise Voltage (f = 10 Hz to 10 kHz, T = +25C) V 50 V J n Long Term Stability (T = +125C for 1000 Hours) S 5.0 mV A Output Short Circuit Current I 30 65 100 mA SC OSCILLATOR SECTION Frequency T = +25C f 380 400 420 kHz J osc Line (V = 10 V to 30 V) and Temperature (T = T to T ) 370 400 430 CC A low high Frequency Change with Voltage (V = 10 V to 30 V) f / V 0.2 1.0 % CC osc Frequency Change with Temperature (T = T to T ) f / T 2.0 % A low high osc Sawtooth Peak Voltage V 2.6 2.8 3.0 V P Sawtooth Valley Voltage V 0.7 1.0 1.25 V V Clock Output Voltage High State V 3.9 4.5 V OH Low State V 2.3 2.9 OL 1. Maximum package power dissipation limits must be observed. 2. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible. T = 0C for MC34025 T = +70C for MC34025 low high T = 40C for MC33025 T = +105C for MC33025 low high