
Semiconductor Components Industries, LLC, 2006
October, 2006 Rev. 1
1
Publication Order Number:
NCV8842/D
NCV8842
1.5 A, 170 kHz, Buck
Regulator with
Synchronization Capability
The NCV8842 is a 1.5 A buck regulator IC operating at a
fixedfrequency of 170 kHz. The device uses the V
2
architecture to provide unmatched transient response, the best overall
regulation and the simplest loop compensation for today’s highspeed
logic. The NCV8842 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.
control
Features
V
2
Architecture Provides UltraFast 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 Lead Provides PowerDown Option
1.0 A Quiescent Current During PowerDown
Thermal Shutdown
SoftStart
Internally Fused Leads in SO16L Package
NCV Prefix for Automotive and Other Applications Requiring Site
and Control Changes
PbFree Packages are Available
MARKING
DIAGRAMS
16
http://onsemi.com
SO16 WB
PW SUFFIX
CASE 751AG
1
16
NCV8842
AWLYYWWG
1
18LEAD DFN
MN SUFFIX
CASE 505
1
NCV8842
AWLYYWW
1
18
18
A
L, WL
Y, YY
W, WW = Work Week
E
= Automotive Grade
or G
= PbFree Package
= Assembly Location
= Wafer Lot
= Year
(Note: Microdot may be in either location)
See detailed ordering and shipping information in the package
dimensions section on page 13 of this data sheet.
ORDERING INFORMATION