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NCP1547 Datasheet دیتاشیت PDF دانلود

دیتاشیت - ON Semiconductor - Buck Regulator

شماره قطعه NCP1547
شرح مفصل Buck Regulator
تولید کننده ON Semiconductor 
آرم ON Semiconductor 


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NCP1547 شرح
NCP1547
1.5 A, 340 kHz, Buck
Regulator with
Synchronization Capability
The NCP1547 is a 1.5 A buck regulator IC operating at a
fixed−frequency 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 high−speed
logic. The NCP1547 accommodates input voltages from 4.5 V to 40 V
and contains synchronization circuitry.
The on−chip 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 on−chip power dissipation.
Protection circuitry includes thermal shutdown, cycle−by−cycle
current limiting and frequency foldback.
Features
V2 Architecture Provides Ultra−Fast Transient Response, Improved
Regulation and Simplified Design
2.0% Error Amp Reference Voltage Tolerance
Switch Frequency Decrease of 4:1 in Short Circuit Conditions
Reduces Short Circuit Power Dissipation
BOOST Lead Allows “Bootstrapped” Operation to Maximize
Efficiency
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Sync Function for Parallel Supply Operation or Noise Minimization
Shutdown Lead Provides Power−Down Option
1.0 mA Quiescent Current During Power−Down
Thermal Shutdown
Soft−Start
This is a Pb−Free Device
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MARKING
DIAGRAM
1 18
18
1
18−LEAD DFN
MN SUFFIX
CASE 505
NCP1547
AWLYYWW G
G
A = Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
E = Automotive Grade
G = Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 12 of this data sheet.
© Semiconductor Components Industries, LLC, 2007
March, 2007 − Rev. 0
1
Publication Order Number:
NCP1547/D

قانون اساسیصفحه 13
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