- 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：4.5 至 35V 滞环非同步 PFET 降压控制器
- 点击这里打开及下载LM3485的技术文档资料
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The LM3485 is a high-efficiency PFET switching regulator controller that can be used to quickly and easily develop a small, low-cost, switching buck regulator for a wide range of applications. The hysteretic control architecture provides for simple design without any control-loop stability concerns using a wide variety of external components. The PFET architecture also allows for low component count as well as ultralow dropout, 100% duty cycle operation. Another benefit is high efficiency operation at light loads without an increase in output ripple.
Current limit protection is provided by measuring the voltage across the RDS(ON) of the PFET, thus eliminating the need for a sense resistor. The cycle-by-cycle current limit can be adjusted with a single resistor, ensuring safe operation over a range of output currents.
- Easy-to-Use Control Methodology
- No Control-Loop Compensation Required
- 4.5-V to 35-V Wide Input Range
- 1.242-V to VIN Adjustable Output Range
- High Efficiency 93%
- ±1.3% (±2% Over Temp) Internal Reference
- 100% Duty Cycle
- Maximum Operating Frequency > 1 MHz
- Current Limit Protection
- Vin (Min) (V)
- 4.5
- Vin (Max) (V)
- 35
- Vout (Min) (V)
- 1.242
- Vout (Max) (V)
- 35
- Iout (Max) (A)
- 4
- Iq (Typ) (uA)
- 250
- Switching frequency (Min) (kHz)
- 50
- Switching frequency (Max) (kHz)
- 1000
- Features
- Enable
- Regulated outputs (#)
- 1
- Number of phases
- 1
- Rating
- Catalog
LM3485的完整型号有：LM3485MM/NOPB、LM3485MMX/NOPB，以下是这些产品的关键参数及官网采购报价：
LM3485MM/NOPB，工作温度：-40 to 125，封装：VSSOP (DGK)-8，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：NIPDAUAG，TI官网LM3485MM/NOPB的批量USD价格：0.612（1000+）
LM3485MMX/NOPB，工作温度：-40 to 125，封装：VSSOP (DGK)-8，包装数量MPQ：3500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LM3485MMX/NOPB的批量USD价格：0.51（1000+）
LM3485EVAL — 滞后 PFET 降压控制器评估模块
Hysteretic PFET Buck Controller
LM3485LED-EVAL — 滞后 PFET 降压控制器
The LM3485 LED driver board is a buck regulator derived controlled current source designed to drive high power, high brightness LEDs (HBLEDs) such as the Luxeon Emitter at dissipations of 1W to 5W. The board can accept an input voltage ranging from 5V to 30V and can control the output current (...)
LM3485 PSpice Transient Model
PSpice for TI 可提供帮助评估模拟电路功能的设计和仿真环境。此功能齐全的设计和仿真套件使用 Cadence 的模拟分析引擎。PSpice for TI 可免费使用，包括业内超大的模型库之一，涵盖我们的模拟和电源产品系列以及精选的模拟行为模型。借助?PSpice for TI 的设计和仿真环境及其内置的模型库，您可对复杂的混合信号设计进行仿真。创建完整的终端设备设计和原型解决方案，然后再进行布局和制造，可缩短产品上市时间并降低开发成本。
在?PSpice for TI 设计和仿真工具中，您可以搜索 TI (...)
