TEST REPORT
Synchronous Inverting Buck-Boost Converter Reference Design With Adjustable Negative Output Voltage
Description
This reference design utilizes a synchronous buck regulator with internal top and bottom FETs, which is configured as a synchronous inverting buck-boost converter to provide an adjustable output of between –0.2 V and –0.6 V capable of delivering a maximum of 15 A of current to the load. The output voltage is adjusted by either providing a PWM signal or analog voltage signal to the –Vout Adj connector, referenced to GND. See the Board Schematic for details regarding voltages.
Top Side of PCB
Bottom Side of PCB
Board Schematic1 Test Prerequisites
1.1 Voltage and Current Requirements
Table 1-1 Voltage and Current
Requirements
| Parameter | Specifications |
|---|---|
| VIN | 12 VDC ±10% |
| VOUT | –0.2 VDC to –0.6 VDC (adjustable) |
| IOUT | 15 A maximum |
| FSW | 500 kHz nominal |