LM3485MM Part Information
Details for LM3485MM by Texas Instruments
Electronic & Electrical Components > Semiconductors - ICs > Power Management
Part 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 cycleby-cycle current limit can be adjusted with a single resistor, ensuring safe operation over a range of output currents.
Part Downloads
Download PCB Footprint from Ultra Librarian
Part Features
- 1.242-V to VIN Adjustable Output Range
- 100% Duty Cycle
- 4.5-V to 35-V Wide Input Range
- Current Limit Protection
- Easy-to-Use Control Methodology
- High Efficiency 93%
- Maximum Operating Frequency > 1 MHz
- No Control-Loop Compensation Required
- u00b11.3% (u00b12% Over Temp) Internal Reference
Part Specifications
| Supply Voltage Min | 4.5V |
| Supply Voltage Max | 35V |
| No. of Outputs | 1 Output, 1Outputs |
| Duty Cycle (%) | 100% |
| Controller IC Case Style | VSSOP |
| No. of Pins | 8Pins |
| Switching Frequency | 1MHz |
| Topology | Buck (Step Down) |
| Operating Temperature Min | -40°C |
| Operating Temperature Max | 125°C |
| Product Range | - |
| Automotive Qualification Standard | - |
| RoHS Phthalates Compliant | Yes |
| MSL | - |
| SVHC | No SVHC (27-Jun-2018) |
| Adjustable Output Voltage Min | 1.242V |
| Base Number | 3485 |
| Frequency | 1MHz |
| Input Voltage | -0.3V |
| Input Voltage Max | 36V |
| Operating Temperature Range | -40°C to +125°C |
| Output Current | 4A |
| Output Current Max | 0.44A |
| Termination Type | Surface Mount Device |
| Voltage Regulator Type | Buck |