NCV8842_11 Datasheet, PDF (1/16 Pages) ON Semiconductor – 1.5 A, 170 kHz, Buck Regulator with Synchronization Capability

NCV8842
1.5 A, 170 kHz, Buck
Regulator with
Synchronization Capability
The NCV8842 is a 1.5 A buck regulator IC operating at a
fixed−frequency of 170 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 NCV8842 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
• Exposed Pad Packages for Enhanced Thermal Characteristics
• NCV Prefix for Automotive and Other Applications Requiring Site
and Change Controls
• These are Pb−Free Devices
http://onsemi.com
MARKING
DIAGRAMS
16
16
1
SO−16W EP
PW SUFFIX
CASE 751AG
NCV8842
AWLYYWWG
1
1
1
18
18 ^{18−LEAD DFN}
MN SUFFIX
CASE 505
NCV8842
AWLYYWW G
G
8
1
SOIC−8
D SUFFIX
CASE 751
8
V8842
ALYWE
G
1
A
= Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = 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, 2011
1
July, 2011 − Rev. 10
Publication Order Number:
NCV8842/D