SNVA869 November 2020 LP875761-Q1
With this presented solution with LP875761-Q1 the output voltage accuracy requirement is met for EyeQ4 High application processor while maintaining good efficiency. Phase margin is over 50° in all measured conditions which shows good stability of the control loop. Table 7-1 shows combined data for the critical parameters.
| Parameter | Result | Comment |
|---|---|---|
| DC output voltage accuracy, includes voltage reference, DC load and line regulations, process, and temperature effect | Within ±10 mV | ±1.0% with 1 V output voltage |
| Transient load step response 4 A to 12 A to 4 A. 8 A/µs | Within ±20 mV | ±2% with 1 V output voltage |
| Total accuracy including DC + transient | Within ±30 mV | ±3% with 1 V output voltage |
| Efficiency | 88% at 4 A load, VIN = 3.3 V | |
| Phase margin | 50 – 64° depending on condition | >45° is considered good design target |
| Gain margin | 13 – 19 dB depending on condition | >10 dB is considered as good design target |
| Bandwidth | 114 – 294 kHz depending on condition |