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© Semiconductor Components Industries, LLC, 2006 October, 2006 − Rev. 2 1 Publication Order Number: NCP1595/D NCP1595, NCP1595A Current Mode PWM Converter for Low Voltage Outputs The NCP1595/NCP1595A is a current mode PWM buck converter with integrated power switch and synchronous rectifier. It can provide up to 1.5 A output current with high conversion efficiency. High frequency PWM control scheme can provide a low output ripple noise. Thus, it allows the usage of small size passive components to reduce the board space. In a low load condition, the controller will automatically change to PFM mode for provides a higher efficiency at low load. Additionally, the device includes soft−start, thermal shutdown with hysteresis, cycle−by−cycle current limit, and short circuit protection. This device is available in compact 3x3 DFN package. Features • High Efficiency 95% @ 3.375 V • Synchronous Rectification for Higher Efficiency in PWM Mode • Integrated MOSFET • Fully Internal Compensation • High Switching Frequency, 1.0 MHz • Low Output Ripple • Cycle−by−cycle Current Limit • Current Mode Control • Short Circuit Protection • Built−in Slope Compensation for Current Mode PWM Converter • $1.5% Reference Voltage • Thermal Shutdown with Hysteresis • Ext. Adjustable Output Voltage • Fast Transient Response • Low Profile and Minimum External Components • Designed for Use with Ceramic Capacitor • Compact 3x3 DFN Package • These are Pb−Free Devices Typical Applications • Hard Disk Drives • USB Power Device • Wireless and DSL Modems DFN6 3*3 MM, 0.95 PITCH CASE 506AH MARKING DIAGRAMS http://onsemi.com 1 A = Assembly Location L = Wafer Lot Y = Year W = Work Week G = Pb−Free Package 1595A ALYW G 1 N1595 ALYW G 1 NC VCC VCCP FB GND LX EN VCC VCCP FB GND LX 1595 1595A PIN CONNECTIONS See detailed ordering and shipping information in the package dimensions section on page 11 of this data sheet. ORDERING INFORMATION |
