CX8509 Datasheet PDF – Synchronous Buck Regulator

Part Number: CX8509

Function: Monolithic Synchronous Buck Regulator

Package: SOIC 8 Pin Type

Manufacturer: Core Micro Technology

CX8509 datasheet regulator


The CX8509 is a monolithic synchronous buck regulator. The device integrates 100mΩ MOSFETS that provide 2A continuous load current over a wide operating input voltage of 4.75V to 25V. Current mode control provides fast transient response and cycle-by-cycle current limit.

An adjustable soft-start prevents inrush current at turn-on. In shutdown mode, the supply current drops below 1 μA.


CX8509 pinout


1. 2A Output Current
2. Wide 4.75V to 25V Operating Input Range
3. Integrated 100mΩ Power MOSFET Switches
4. Output Adjustable from 0.925V to 20V
5. Up to 95% Efficiency
6. Programmable Soft-Start
7. Stable with Low ESR Ceramic Output Capacitors
8. Fixed 400KHz Frequency
9. Cycle-by-Cycle Over Current Protection
10. Input Under Voltage Lockout
11. Thermally Enhanced 8-Pin SOIC Package


1. Distributed Power Systems
2. Networking Systems
3. Set-top Box
4. LCD TV/Monitor
5. Notebook or Mini-Book

Other data sheets are available within the file: X8509

CX8509 Datasheet PDF Download

CX8509 pdf


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