SLUSFH4A March 2025 – July 2025 BQ25858-Q1 , BQ25858B-Q1
PRODUCTION DATA
請參考 PDF 數據表獲取器件具體的封裝圖。
The MODE pin can be used to configure the device as either a buck-boost or buck-only configuration. When configured as buck-only typical inductor value used must be provided to appropriately compensate the converter. The closest inductor to the values presented below should be programmed via the MODE pin.
At POR, the device detects the MODE pin pull down resistance, then sets the device operating mode as shown below. The MODE pin resistance detection is only done one time at the device POR, after that, the power converter will not sense the MODE pin voltage any more. Follow the resistance listed in the table below to set the desired operating mode. The surface mount resistor with ±1% or ±2% tolerance is recommended.
| OPERATION | L (nom) | RDCR (min) | RDCR (max) | TYPICAL RESISTANCE AT MODE PIN |
|---|---|---|---|---|
| Buck-Boost, device detects inductance automatically | 2.2μH - 15μH | L/DCR = 1260μs(1) | 60mΩ | ≤3.0kΩ |
| Buck-Only | 3.3μH | 2.6mΩ | 60mΩ | 4.7kΩ |
| Buck-Only | 4.7μH | 3.7mΩ | 60mΩ | 6.04kΩ |
| Buck-Only | 5.6μH | 4.4mΩ | 60mΩ | 8.2kΩ |
| Buck-Only | 6.8μH | 5.4mΩ | 60mΩ | 10.5kΩ |
| Buck-Only | 8.2μH | 6.5mΩ | 60mΩ | 13.7kΩ |
| Buck-Only | 10μH | 7.9mΩ | 60mΩ | 17.4kΩ |
| Buck-Only | 15μH | 11.9mΩ | 60mΩ | ≥27.0kΩ |