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NCV8843 Dataheets PDF



Part Number NCV8843
Manufacturers ON Semiconductor
Logo ON Semiconductor
Description Buck Regulator
Datasheet NCV8843 DatasheetNCV8843 Datasheet (PDF)

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.

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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.


NCV8842 NCV8843 Z100FF3


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