JAJSNX2 January 2024 TPSM843820E
PRODUCTION DATA
The TPSM843820E uses VIN, duty cycle, and low-side FET current information to generate an internal ramp. The ramp amplitude is determined by an internal ramp generation capacitor, CRAMP. Three different values for CRAMP can be selected with a resistor to AGND on the MODE pin (see Section 6.3.8). The capacitor options are 1pF, 2pF, and 4pF. A larger ramp capacitor results in a smaller ramp amplitude, which results in a higher control loop bandwidth. Figure 6-6 and Figure 6-7 show how the loop changes with each ramp setting for the schematic in Typical Applications.