Texas Instruments LM5140-Q1 双路低 Iq 值同步降压控制器
Texas Instruments LM5140-Q1 双路低 Iq 值同步降压控制器用于高电压宽 V
IN 降压转换器应用。 控制方法基于电流模式控制。 电流模式控制可提供内部线路前馈、逐周期电流限制和简化的环路补偿。 LM5140-Q1 可调节转换率控制功能，能够简化 CISPR 和汽车级电磁干扰 (EMI) 要求的合规性。 LM5140-Q1 可在 2.2MHz 或 440kHz 的可选开关频率下运行，两条控制器通道发生 180º 出相。 在轻负载或无负载条件下，LM5140-Q1 通过在跳周期模式下运行来提升低功耗效率。
特性
- AEC-Q100 grade 1 qualified (TA =–40ºC to 125ºC)
- Input operating range from 3.8V to 65V (70V absolute maximum)
- Two interleaved buck controllers with
- VOUT1 fixed 3.3V, 5V, or adjustable from 1.5V to 15V, accuracy ±1%
- VOUT2 fixed 5V, 8V, or adjustable from 1.5V to 15V, accuracy ±1%
- Fixed 2.2MHz or 440kHz switching frequency, accuracy ±7%
- Optional synchronization to an external clock
- SYNC output clock for additional converters
- Shutdown mode current: 9µA typical
- No load standby current: 35µA typical (one channel operating)
- Current limit threshold programmable to 50mV or 75mV, accuracy ±10%
- Independent enable inputs for VOUT1 and VOUT2
- Hiccup mode protection for sustained overload
- Independent power good outputs
- High-side and low-side gate drivers with
- Adjustable slew rate control
- Selectable diode emulation or continuous
- Conduction at light load
- VQFN-40 package with wettable flanks
应用
- Automotive electronics
- Infotainment systems
- Instrument clusters
- Advanced Driver Assistance (ADAS)
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