NCV51411 Datasheet, PDF (1/16 Pages) ON Semiconductor – 1.5 A, 260 kHz, Low Voltage Buck Regulator with Synchronization Capability

NCV51411
1.5 A, 260 kHz, Low Voltage
Buck Regulator with
Synchronization Capability
The NCV51411 is a 1.5 A buck regulator IC operating at a
fixed−frequency of 260 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 NCV51411 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. The NCV51411 is
functionally pin−compatible with the LT1375.
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
• Sync Function for Parallel Supply Operation or Noise Minimization
• Shutdown Pin Provides Power−Down Option
• 85 mA Quiescent Current During Power−Down
• Thermal Shutdown
• Soft−Start
• Pin Compatible with LT1375 (SO−8 Version)
• NCV Prefix for Automotive and Other Applications Requiring Site
and Change Controls
• Pb−Free Packages are Available
http://onsemi.com
8
1
SO−8
D SUFFIX
CASE 751
MARKING
DIAGRAMS
8
51411
ALYWE
G
1
16
1
16
SO−16W EP
PW SUFFIX
CASE 751AG
NCV51411
AWLYYWWG
1
1
18
18
18−LEAD DFN ^NCV51411
1
MN SUFFIX ^{AWLYYWW G}
CASE 505
G
A
= Assembly Location
L, WL = Wafer Lot
Y, YY = Year
W, WW = Work Week
E
= Automotive Grade
G or 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 13 of this data sheet.
© Semiconductor Components Industries, LLC, 2010
1
May, 2010 − Rev. 15
Publication Order Number:
NCV51411/D