LM25085ASDX/NOPB
Active4.5-42V WIDE VIN, CONSTANT ON-TIME NON-SYNCHRONOUS PFET BUCK CONTROLLER WITH 0.9V REFERENCE
LM25085ASDX/NOPB
Active4.5-42V WIDE VIN, CONSTANT ON-TIME NON-SYNCHRONOUS PFET BUCK CONTROLLER WITH 0.9V REFERENCE
Description
General part information
LM25085 Series
The LM25085A is a functional variant of the LM25085 COT PFET Buck Switching Controller. The functional differences of the LM25085A are: The feedback reference voltage is 0.9V, the forced off-time after current limit detection is longer, and the soft-start time is shorter (1.8 ms).
The LM25085A 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.
The LM25085A is a functional variant of the LM25085 COT PFET Buck Switching Controller. The functional differences of the LM25085A are: The feedback reference voltage is 0.9V, the forced off-time after current limit detection is longer, and the soft-start time is shorter (1.8 ms).
Technical Specifications
Parameters and characteristics for this part
| Specification | LM25085ASDX/NOPB |
|---|---|
| Clock Sync | No |
| Control Features | Current Limit, Frequency Control |
| Duty Cycle (Max) | 100 % |
| Frequency - Switching (Max) | 1 MHz |
| Function | Step-Down |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature (Max) | 125 °C |
| Operating Temperature (Min) | -40 °C |
| Output Configuration | Positive |
| Output Phases | 1 |
| Output Type | Transistor Driver |
| Package / Case | 8-WFDFN Exposed Pad |
| Package Length | 3 mm |
| Package Name | 8-WSON |
| Package Width | 3 mm |
| Synchronous Rectifier | No |
| Topology | Buck |
| Voltage - Supply (Vcc/Vdd) Maximum | 42 V |
| Voltage - Supply (Vcc/Vdd) Minimum | 4.5 V |
Pricing
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