Part Number: LM25085
Function: 42V Constant On-Time PFET Buck Switching Controller
Package: VSSOP, WSON, HVSSOP 8 Pin Type
Manufacturer: Texas Instruments
Pinouts:
Description
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 R DS(ON) of the PFET or an external sense resistor can be used to sense current for over current detection.
Schematic
Features
1. Programmable Switching Frequency to 1MHz
2. No Loop Compensation Required
3. Ultra-Fast Transient Response
4. Adjustable Output Voltage from 1.25V
5. Integrated High Voltage Bias Regulator
Applications
1. Automotive Infotainment
2. Battery/Super Capacitor Chargers
3. LED Drivers
Other data sheets are available within the file:
LM25085-Q1, LM25085MM/NOPB, LM25085MME/NOPB, LM25085MMX/NOPB
LM25085 Datasheet PDF Download
