NCP1547_11 Datasheet, PDF (1/15 Pages) ON Semiconductor – 1.5 A, 340 kHz, Buck Regulator with Synchronization Capability

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 V²â„¢ 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 4.0 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
• Wide Operating Range: 4 V to 40 V
• 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
• 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
• These are Pb−Free Devices
http://onsemi.com
MARKING
DIAGRAM
1
18
18
1
18−LEAD DFN
MN SUFFIX
CASE 505
NCP1547
AWLYYWW G
G
8
1
SOIC−8
D SUFFIX
CASE 751
8
P1547
ALYWE
G
1
A
= Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
E
= Automotive Grade
G
= Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
Device
Package
Shipping^†
NCP1547DG
SOIC−8 98 Units / Rail
(Pb−Free)
NCP1547DR2G SOIC−8 2500 / Tape & Reel
(Pb−Free)
NCP1547MNR2G DFN18 2500 / Tape & Reel
(Pb−Free)
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
© Semiconductor Components Industries, LLC, 2011
1
July, 2011 − Rev. 5
Publication Order Number:
NCP1547/D