器件名称: 1N5817
功能描述: 1.5 A, 340 kHz, Buck Regulator with Synchronization Capability
文件大小: 157.49KB 共13页
简 介:NCP1547 1.5 A, 340 kHz, Buck Regulator with Synchronization Capability
The NCP1547 is a 1.5 A buck regulator IC operating at a fixedfrequency of 340 kHz. The device uses the V2t control architecture to provide unmatched transient response, the best overall regulation and the simplest loop compensation for today’s highspeed logic. The NCP1547 accommodates input voltages from 4.5 V to 40 V and contains synchronization circuitry. The onchip NPN transistor is capable of providing a minimum of 1.5 A of output current, and is biased by an external “boost” capacitor to ensure saturation, thus minimizing onchip power dissipation. Protection circuitry includes thermal shutdown, cyclebycycle current limiting and frequency foldback.
Features http://onsemi.com MARKING DIAGRAM
1 18 NCP1547 AWLYYWW G G 18
1 18LEAD DFN MN SUFFIX CASE 505
V2 Architecture Provides UltraFast Transient Response, Improved 2.0% Error Amp Reference Voltage Tolerance Switch Frequency Decrease of 4:1 in Short Circuit Conditions
Reduces Short Circuit Power Dissipation Regulation and Simplified Design
A WL YY WW E G = Assembly Location = Wafer Lot = Year = Work Week = Automotive Grade = PbFree Package
BOOST Lead Allows “Bootstrapped” Operation to Maximize
Efficiency Sync Function for Parallel Supply Operation or Noise Minimization Shutdown Lead Provides PowerDown Option 1.0 mA Quiescent Current During PowerDown Thermal Shutdown SoftStart This is a PbFree Device
(Note: Microdot may be in either location)
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