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Updated at 02/11/2025 10:30:15(UTC+8)
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Description
- Description
- 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.
- Features
- • 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
- Applications
- • Set-Top Box
- • DSL or Cable Modem
- • PC/IA
- • Auto PC
- • TFT Monitor
- • Battery-Powered Portable Applications
- • Distributed Power Systems
- • Always On Power
LM3485MMX Specifications
| Attribute | Attribute Value |
|---|---|
| Datasheet | Datasheet |
| 3D Model | 3D Model |
| Mounting Style | Surface Mount |
| Number of Pins | 8 Pin |
| Case/Package | TSSOP-8 |
| Number of Outputs | 1 Output |
| Output Voltage | 1.242V ~ 35V |
| Output Current | 4 A |
| Number of Channels | 1 Channel |
| Quiescent Current | 250 µA |
| Number of Regulated Outputs | 1 Output |
| Switching Frequency | 1 MHz |
| Topology | Buck |
| Duty Cycle | 100 % |
| Input Voltage (Max) | 35 V |
| Input Voltage (Min) | 4.5 V |
| Maximum Duty Cycle | 1 |
| Operating Temperature (Max) | 125 ℃ |
| Operating Temperature (Min) | 40 ℃ |
| Power Dissipation (Max) | 417 mW |
| Supply Voltage | 4.5V ~ 35V |
| Input Voltage | 4.5V ~ 35V |
| Show | |
| Operating Temperature | -40℃ ~ 125℃ (TJ) |
| Product Lifecycle Status | Active |
| Packaging | Tape & Reel (TR) |
| RoHS | Non-Compliant |
| Lead-Free Status | Contains Lead |
Order guide
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- Delivery date: usually 2 to 7 working days.
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- - Carefully inspected and packed by ManyChip warehouse - Vacuum packaging - Anti-static packaging - Shockproof foam
- The terms here are for reference only, the actual terms are subject to the sales quotation. - Please confirm product specifications when ordering. - MOQ refers to the minimum order quantity required to purchase each part. - If you have special ordering instructions, please indicate them on the ordering page. - Inspection (PSI) will be performed prior to shipment.
- - Income Quality Control (IQC), 1000+ qualified dealers. - Chips are tested by authoritative organizations to ensure the quality, authenticity and safety of your device. - Decapsulation control - X-ray control - XRF inspection - Electrical testing - Surface testing -Digital components warehouse, covering an area of 800 square meters, with constant temperature and humidity
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