- 制造厂商:TI
- 产品类别:电源管理
- 技术类目:直流/直流开关稳压器 - 降压稳压器
- 功能描述:用于便携式应用的高性能、微型 1.5A 降压直流/直流转换器
- 点击这里打开及下载LM3678的技术文档资料
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The LM3678 step-down DC-DC converter is optimized for powering low-voltage circuits from a single Li-Ion cell battery and input voltage rails from 2.5 V to 5.5 V. It provides up to 1.5-A load current, over the entire input voltage range. LM3678 offers a 0.8V or 1.2V option. One of the pair of voltages is set through the VSELECT pin.
LM3678 operates in PWM mode with a fixed frequency of 3.3 MHz. Internal synchronous rectification provides high efficiency during PWM mode operation. In shutdown mode, the device turns off and reduces battery consumption to 0.01 µA (typical).
The LM3678 is available in a 3mm x 3mm DSC-10 package. A high switching frequency of 3.3 MHz (typical) allows use of tiny surface-mount components. Only three external surface-mount components, an inductor and two ceramic capacitors, are required (solution size less than 33 mm2). For voltages other than the voltage shown, contact TI or your distributor.
- VOUT = 0.8 V or 1.2 V
- VIN = 2.5 V to 5.5 V
- 1.5-A Maximum Load Capability
- 3.3-MHz (Typical) PWM Fixed Switching Frequency Allows Use of 1-μH Inductor
- ±3% DC Output Voltage Precision
- 0.01-μA (Typical) Shutdown Current
- Internal Synchronous Rectification for High Efficiency
- Internal Soft Start
- Current Overload and Thermal Shutdown Protection
All trademarks are the property of their respective owners.
- Vin (Min) (V)
- 2.5
- Vin (Max) (V)
- 5.5
- Vout (Min) (V)
- 0.8
- Vout (Max) (V)
- 1.2
- Iout (Max) (A)
- 1.5
- Iq (Typ) (uA)
- 400
- Switching frequency (Min) (kHz)
- 2700
- Switching frequency (Max) (kHz)
- 3600
- Features
- Enable, Power Good, Synchronous Rectification, Adaptive/Dynamic Voltage Scaling
- Rating
- Catalog
- Regulated outputs (#)
- 1
- Control mode
- Voltage Mode
- Duty cycle (Max) (%)
- 100
LM3678的完整型号有:LM3678SD-1.2/NOPB、LM3678SDE-1.2/NOPB,以下是这些产品的关键参数及官网采购报价:
LM3678SD-1.2/NOPB,工作温度:-30 to 85,封装:WSON (DSC)-10,包装数量MPQ:1000个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:SN,TI官网LM3678SD-1.2/NOPB的批量USD价格:.668(1000+)
LM3678SDE-1.2/NOPB,工作温度:-30 to 85,封装:WSON (DSC)-10,包装数量MPQ:250个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:SN,TI官网LM3678SDE-1.2/NOPB的批量USD价格:.668(1000+)
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