Product Summary

The MC33025DW is a high speed, fixed frequency, double–endedpulse width modulator controller optimized for high frequency operation.The MC33025DW is specifically designed for Off–Line and DC–to–DC converterapplications offering the designer a cost effective solution with minimalexternal components. The MC33025DW features an oscillator, atemperature compensated reference, a wide bandwidth error amplifier, ahigh speed current sensing comparator, steering flip–flop, and dual highcurrent totem pole outputs ideally suited for driving power MOSFETs.

Parametrics

MC33025DW absolute maximum ratings: (1)Power Supply Voltage VCC: 30 V; (2)Output Driver Supply Voltage VC: 20 V; (3)Output Current, Source or Sink Pulsed (0.5 ms) IO: 2.0A; (4)Current Sense, Soft–Start, Ramp, and Error Amp Inputs Vin: –0.3 to +7.0 V; (5)Error Amp Output and Soft–Start Sink Current IO: 10 mA; (6)Clock and RT Output Current ICO: 5.0 mA; (7)Power Dissipation and Thermal Characteristics: SO–16 Package (Case 751G) Maximum Power Dissipation @ TA = +25°C: 862mW; (8)DIP Package (Case 648) Maximum Power Dissipation @ TA = +25°C: ; (9)1.25W; (10)Operating Junction Temperature TJ: +150 °C; (11)Operating Ambient Temperature TA: 0 to +70°C; (12)Storage Temperature Range Tstg: –55 to +150 °C.

Features

MC33025DW features: (1)50 ns Propagation Delay to Outputs; (2)Dual High Current Totem Pole Outputs; (3)Wide Bandwidth Error Amplifier; (4)Fully–Latched Logic with Double Pulse Suppression; (5)Latching PWM for Cycle–By–Cycle Current Limiting; (6)Soft–Start Control with Latched Overcurrent Reset; (7)Input Undervoltage Lockout with Hysteresis; (8)Low Start–Up Current (500 mA Typ); (9)Internally Trimmed Reference with Undervoltage Lockout; (10)90% Maximum Duty Cycle (Externally Adjustable); (11)Precision Trimmed Oscillator; (12)Voltage or Current Mode Operation to 1.0 MHz; (13)Functionally Similar to the UC3825.

Diagrams

MC33025DW pin connection

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
MC33025DW
MC33025DW
ON Semiconductor
Current Mode PWM Controllers Dual Output Voltage
Data Sheet
Negotiable 
MC33025DWG
MC33025DWG
ON Semiconductor
Current Mode PWM Controllers Dual Output Voltage or Current Mode PWM
Data Sheet
0-1: $3.05
1-25: $2.45
25-100: $2.23
100-500: $1.81
MC33025DWR2G
MC33025DWR2G
ON Semiconductor
Current Mode PWM Controllers Dual Output Voltage or Current Mode PWM
Data Sheet
0-490: $2.23
490-500: $1.81
500-1000: $1.52
1000-2000: $1.45
MC33025DWR2
MC33025DWR2
ON Semiconductor
Current Mode PWM Controllers Dual Output Voltage
Data Sheet
Negotiable