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NCV8843
Buck Regulator Synchronous
1.5 A, 340 kHz
The NCV8843 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 NCV8843 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 Control
• These are Pb−Free Devices
http://onsemi.com
MARKING DIAGRAMS
16
16 1
SO−16W EP PW SUFFIX CASE 751AG
NCV8843 AWLYYWWG
1
1
18
18 1
DFN18 MN SUFFIX CASE 505
NCV8843 AWLYYWW G
G
8 1
SOIC−8 D SUFFIX CASE 751
8
V8843 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, 2013
1
August, 2019 − Rev. 11
Publication Order Number: NCV8843/D
Vout (3.3 V)
D1
L1 18 mH
C1 0.1 mF
R3
D2
162
C3 +
100 mF
R2 100
NCV8843
R6 100k
U1
EPAD
Vsw
Vin
SHDNB
BOOST
NC
NC
NC
NC
NC
NC
NC
NC
SYNC
Vc
GND
Vfb
NCV8843
C5 0.1 mF
C4 0.1 mF
Vin (7 V to 16 V)
+ C2 330 mF
SHDNB
SYNC Figure 1. Application Diagram, 7.0 V − 16 V to 3.3 V @ 1.0 A Converter
MAXIMUM RATINGS*
Rating
Value
Unit
Peak Transient Voltage (31 V Load Dump @ VIN = 14 V)
45
V
Operating Junction Temperature Range, TJ
−40 to 150
°C
Lead Temperature Soldering:
Reflow: (Note 1)
260 peak
°C
(Note 2)
Storage Temperature Range, TS ESD
−65 to +150
°C
(Human Body Model)
2.0
kV
(Machine Model)
200
V
(Charge Device Model)
>1.0
kV
Package Thermal Resistance
SO−16W EPAD Junction−to−Case, RqJC
16
SO−16W EPAD Junction−to−Ambient, RqJA (Note 3)
35
DFN18 Junction−to−Ambient, RqJA (Note 3)
38
SO−8 Junction−to−Ambient, RqJA (Note 4)
100
°C/W °C/W °C/W °C/W
Stresses ex.