LM25085SD/NOPB
Active4.5-42V WIDE VIN, CONSTANT ON-TIME NON-SYNCHRONOUS PFET BUCK CONTROLLER
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LM25085SD/NOPB
Active4.5-42V WIDE VIN, CONSTANT ON-TIME NON-SYNCHRONOUS PFET BUCK CONTROLLER
Technical Specifications
Parameters and characteristics for this part
| Specification | LM25085SD/NOPB |
|---|---|
| Clock Sync | False |
| Control Features | Frequency Control, Current Limit |
| Duty Cycle (Max) [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 |
| Supplier Device Package | 8-WSON (3x3) |
| Synchronous Rectifier | False |
| Topology | Buck |
| Voltage - Supply (Vcc/Vdd) [Max] | 42 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 4.5 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 2.02 | |
| 10 | $ 1.81 | |||
| 25 | $ 1.71 | |||
| 100 | $ 1.46 | |||
| 250 | $ 1.37 | |||
| 500 | $ 1.20 | |||
| Digi-Reel® | 1 | $ 2.02 | ||
| 10 | $ 1.81 | |||
| 25 | $ 1.71 | |||
| 100 | $ 1.46 | |||
| 250 | $ 1.37 | |||
| 500 | $ 1.20 | |||
| Tape & Reel (TR) | 1000 | $ 0.99 | ||
| 2000 | $ 0.92 | |||
| 5000 | $ 0.89 | |||
| 10000 | $ 0.86 | |||
| Texas Instruments | SMALL T&R | 1 | $ 1.52 | |
| 100 | $ 1.25 | |||
| 250 | $ 0.90 | |||
| 1000 | $ 0.68 | |||
Description
General part information
LM25085-Q1 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).
Documents
Technical documentation and resources
