SP6139 Datasheet, PDF (12/16 Pages) Sipex Corporation – Wide Input, 1.3MHz Synchronous PWM Controller

SP6139
Wide Input, 1.3MHz Synchronous PWM Step Down
Controller
SP6139 Voltage Mode Control Loop with Loop Dynamic
Definitions:
Resr = Output Capacitor Equivalent Series Resistance
Rdc = Output Inductor DC Resistance
Vramp_pp = SP6139 internal RAMP Amplitude Peak to Peak Voltage
Conditions:
Cz2 >> Cp1 and R1 >> Rz3
Output Load Resistance >> Resr and Rdc
Bode Plot of Type III Error Amplifier Compensation.
© 2008 Exar Corporation
12/16
Rev. 2.0.0