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NCP1550SN19T1G Datasheet(PDF) 1 Page - ON Semiconductor |
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NCP1550SN19T1G Datasheet(HTML) 1 Page - ON Semiconductor |
1 / 17 page © Semiconductor Components Industries, LLC, 2006 July, 2006 − Rev. 8 1 Publication Order Number: NCP1550/D NCP1550 600 kHz PWM/PFM Step−Down DC−DC Controller The NCP1550 is a monolithic micropower high frequency voltage mode step−down controller IC, specially designed for battery operated hand−held electronic products. With appropriate external P−type MOSFET, the device can provide up to 2.0 A loading current with high conversion efficiency. The device operates in Constant−Frequency PWM mode at normal operation, that ensures low output ripple noise, and which will automatically switch to PFM mode at low output loads for higher efficiency. Additionally, value−added features of Chip Enable to reduce IC Off−State current and integrated feedback resistor network, make it the best choice for portable applications. The device is designed to operate for voltage regulation with minimum external components and board space. This device is available in a TSOP−5 package with six standard output voltage options. Features • High Efficiency 92%, Typical • Low Quiescent Bias Current of 50 mA (Typical at PFM Mode with No Load) • Output Voltage Options from 1.8 V to 3.3 V with High Accuracy $2.0% • Low Output Voltage Ripple, 50 mV, Typical • PWM Switching Frequency at 600 kHz • Automatic PWM/PFM Switchover at Light Load Condition • Very Low Dropout Operation, 100% Max. Duty Cycle • Chip Enable Pin with On−Chip 150 nA Pullup Current Source • Low Shutdown Current, 0.3 mA, Typical • Input Voltage Range from 2.45 V to 5.5 V • Built−in Soft−Start • Internal Undervoltage Lockout (UVLO) Protection • Low Profile and Minimum External Components • Micro Miniature TSOP−5 Package • Pb−Free Packages are Available Typical Applications • Personal Digital Assistant (PDA) • Camcorders and Digital Still Camera • Hand−Held Instrument • Distributed Power System • Computer Peripheral • Conversion from Four NiMH or NiCd or One Lithium−ion Cells to 3.3 V/1.8 V TSOP−5 SN SUFFIX CASE 483 MARKING DIAGRAM xxx = Specific Device Code A = Assembly Location Y = Year W = Work Week G = Pb−Free Package 1 5 xxx AYW G G PIN CONNECTIONS CE GND VOUT VIN EXT (Top View) See detailed ordering and shipping information in the package dimensions section on page 16 of this data sheet. ORDERING INFORMATION 1 2 3 4 5 http://onsemi.com (Note: Microdot may be in either location) 1 |
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