Low Voltage Synchronous Buck Controller with Adjustable Switching Frequency
The NCP1575 is a low voltage buck controller. It provides the control for a DC−DC power solution producing an output voltage as low as 0.980 V over a wide current range. It contains all required circuitry for a synchronous NFET buck regulator using the V2 control method to achieve the fastest possible transient response and best overall regulation. The NCP1575 operates at a default switching frequency of 200 kHz, 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 assembled in an SOIC−8 package.
The NCP1575−based solution requires a bias supply of 12 V, and it can convert from a bulk power supply ranging from 2 V to 12 V.
Conversion from bulk supplies greater than 7 V is best accomplished by using an external doubler circuit to raise the enhancement voltage for the external NFET switches.
• Pb−Free Packages are Available
• 0.980 V ±1.0% Reference Voltage
• V2 Control Topology
• 200 ns Transient Response
• Programmable Soft−Start
• 40 ns 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
• “12 V Only” or Dual Supply Operation
Product Change Notification
Product Obsolescence 08/Apr/2011
Integrated Circuits (ICs)
PMIC - Voltage Regulators - DC DC Switching Controllers
Tape & Reel (TR)
Current/Voltage Mode, V²™
Number of Outputs
Frequency - Max
Voltage - Supply
9 V ~ 20 V
0°C ~ 125°C
Package / Case
8-SOIC (0.154", 3.90mm Width)
Warranty :180 days !
Free shipping: Order over $1000 win a free shipment fee
(goods weight below 3Kg) ,during 20130901-20130930 .
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