Texas Instruments LM5175 四开关同步降压-升压控制器
德州仪器 LM5175 四开关同步降压-升压控制器能够对等于、高于或低于输入电压的输出电压进行调节。LM5175 具有 3.5V 至 42V 的宽输入电压范围,支持各类应用。LM5175 在降压和升压工作模式下均采用电流模式控制,以提供出色的负载和线路调节性能。开关频率可通过外部电阻进行编程,并且可与外部时钟信号同步。该器件还具有可编程的软启动功能,并且提供诸如逐周期电流限制、输入欠压闭锁 (UVLO)、输出过压保护(OVP)和热关断等各类保护特性。这一器件还具有可选择的连续导通模式(CCM)或断续导通模式(DCM)。特性
- Single inductor buck-boost controller for step-up/step-down DC/DC conversion
- 3.5V to 42V, 60V Maximum wide VIN range
- 0.8V to 55V Flexible VOUT range
- VOUT Short protection
- High-efficiency buck-boost transition
- Adjustable switching frequency
- Optional frequency sync and dithering
- Integrated 2A MOSFET gate drivers
- Cycle-by-cycle current limit and optional hiccup
- Optional input or output average current limiting
- Programmable input UVLO and soft-start
- Power good and output overvoltage protection
- Selectable CCM or DCM with pulse skipping
- HTSSOP-28 Package (contact factory for QFN)
应用
- Automotive start-stop systems
- Backup battery and supercapacitor charging
- Industrial PC power supplies
- USB power delivery
- LED lighting
Functional Block Diagram
Additional Resources
发布日期: 2015-04-06
| 更新日期: 2024-04-22
