Catalog
Low Voltage Synchronous Buck Controller
Key Features
• 0.980V +/- 1.0% Reference Voltage
• V2 Control Topology
• 200ns Transient Response
• Programmable Soft Start
• 400ns Gate Rise and Fall Times (3.3 nF Load)
• Adaptive FET Nonoverlap Time
• Default 200 kHz Oscillator Frequency (No External Resistor Required)
• User-Programmable Oscillator Frequency (One External Resistor Required)
• Undervoltage Lockout
• On/Off Control Through Use of the COMP Pin
• Overvoltage Protection through Synchronous MOSFETs
• Synchronous N-Channel Buck Design
• 12V Only or Dual Supply Operation
• Pb-Free Packages are Available
Description
AI
The NCP1575 is a low voltage buck controller. It provides the control for dc-dc power solution producing an output voltage as low as 0.980V over a wide current range. It contains all required circuitry for a synchronous NFET buck regulator using the V2TM control method to achieve the fastest possible transient response and best overall regulation. The NCP1575 operates at a default switching frequency of 200kHz, but switching frequency is user-programmable with an additional resistor between Rosc and ground. This device provides undervoltage lockout protection, Soft Start, and built-in adaptive nonoverlap and is assemble in an SO-8 package.
