| TYPE | DESCRIPTION |
|---|
| Mounting Style | Surface Mount |
| Number of Pins | 8 Pin |
| Case/Package | MSOP-8 |
| Number of Outputs | 1 Output |
| Output Voltage | 1.25V ~ 42V |
| Output Current | 1.75 A |
| Quiescent Current | 1.25 mA |
| Number of Regulated Outputs | 1 Output |
| Switching Frequency | 1 MHz |
| Topology | Buck |
| Duty Cycle | 100 % |
| Input Voltage (Max) | 42 V |
| Input Voltage (Min) | 4.5 V |
| Output Voltage (Max) | 42 V |
| Output Voltage (Min) | 1.25 V |
| Output Current (Max) | 10 A |
| Maximum Duty Cycle | 1 |
| Operating Temperature (Max) | 125 ℃ |
| Operating Temperature (Min) | -40 ℃ |
| Supply Voltage | 4.5V ~ 42V |
| Input Voltage | 4.5V ~ 42V |
| TYPE | DESCRIPTION |
|---|
| Product Lifecycle Status | Active |
| Packaging | Tape & Reel (TR) |
| Size-Length | 3 mm |
| Size-Width | 3 mm |
| Size-Height | 0.86 mm |
| Operating Temperature | -40℃ ~ 125℃ |
The LM25085 is a high efficiency PFET switching regulator controller that can be used to quickly and easily develop a small, efficient buck regulator for a wide range of applications. This high voltage controller contains a PFET gate driver and a high voltage bias regulator which operates over a wide 4.5V to 42V input range. The constant on-time regulation principle requires no loop compensation, simplifies circuit implementation, and results in ultra-fast load transient response. The operating frequency remains nearly constant with line and load variations due to the inverse relationship between the input voltage and the on-time. The PFET architecture allows 100% duty cycle operation for a low dropout voltage. Either the RDS(ON) of the PFET or an external sense resistor can be used to sense current for over-current detection.
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