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推荐新设计使用
说明
- Wide Input Voltage Range: 3V to 40V
- 2-Phase Interleaved Operation Reduces Input and Output Capacitance Requirements
- SPI Interface for Output Voltage Adjustment
- Low Shutdown Current < 1μA
- Internal 5V Low Dropout Voltage Regulator Supplied from VIN or VOUT
- PGOOD Output Status Reporting Pin
- Programmable Internal Frequency: 100kHz to 2MHz
- Frequency Synchronization
- Clock Output for 4- or 8-Phase Operation
- Spread Spectrum Frequency Modulation (SSFM) for EMI Reduction
- Available in a 3mm × 4mm 20-Lead Side Solderable QFN Package
- AEC-Q100 Qualified for Automotive Applications
特性
The LT8277 is a 2-phase constant frequency, currentmode boost and SEPIC controller that drives N-channelpower MOSFETs. The 2-phase interleaved operationreduces system filtering capacitance requirements. Aninternal LDO regulator draws power from VIN or VOUT toprovide a 5V supply for the gate drivers. The fixedfrequency, current-mode architecture results in stableoperation over a wide range of supply and outputvoltages. The operating frequency of the LT8277 can beset over a 100kHz to 2MHz range with an externalresistor or can be synchronized to an external clockusing the SYNC pin. The CLKOUT and SYNC pins allowmultiple LT8277 devices to work together, enabling 4- or8-phase operation.
The LT8277 output voltage ranges from 9V to 60V, whichcan be set through the SPI interface. A windowcomparator on the VOUT pin reports via the PGOOD pin,providing an output voltage status indication. Thedevice is available in a 20-Lead 3mm x 4mm side-solderableQFN package.
APPLICATIONS
- Automotive, Telecom, and Industrial Power Supplies
参数
类型 | 描述 |
汽车 | 座舱体验和信息娱乐系统 |
通信 | 5G毫米波无线通信 |
工业自动化技术 (IAT) | 工业电源 |
