Gate Drivers | NCP81085

Dual MOSFET Gate Driver

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The NCP81085 is a high performance dual MOSFET gate driver optimized to drive the gates of both high and low side power MOSFETs in a synchronous buck converter. The NCP81085 uses an on−chip bootstrap diode to eliminate the external discrete diode. A high floating top driver design can accommodate HB voltage as high as 180 V. The low−side and high−side are independently controlled and match to 4 ns between the turn−on and turn−off of each other. Independent Under−Voltage lockout is provided for the high side and low side driver forcing the output low when the drive voltage is below a specific threshold.

  • Class D Audio Amplifiers
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  • Telecom and Datacom
  • Isolated Non−Isolated Power Supply Architectures
  • Class D Audio Amplifiers

  • WDFN9 (MT) Package
  • Floating Top Driver Accommodates Boost Voltage up to 180 V
  • Drives Two N-Channel MOSFETs in High-Side and Low-Side Configuration
  • Switching Frequency up to 1 MHz
  • 20 ns Propagation Delay Times
  • 4 A Sink, 4 A Source Output Currents
  • 8 ns Rise / 7 ns Fall Times with 1000 pF Load
  • UVLO Protection
  • Specified from −40°C to 140°C
  • Pb−Free, Halogen Free/BFR Free and is RoHS Compliant

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NCP81085MTTXG

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CAD Model

Pb

A

H

P

WDFN9 4x5, 0.8P

511EF

1

260

REEL

4000

F

MOSFET

2

High-Low

Junction Isolation

180

20

8

7

4

4

20

20

3.5

$0.9775

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Reliability Data

Die Related Summary Data

Device: NCP81085MTTXG

Equivalent to wafer fab process: CMOS SUB

Product Technology

Product Technology

Equivalent Device-Hours

MTBF/MTTF in Hours

FITS

CMOS SUB

2

920154574

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Re-calculate Data

Data is based on the following assumptions.

Note: The temperature and confidence level may be adjusted to your requirements.

Disclaimer: A reliability FIT rate calculated using this tool shall not be used for any functional safety purpose. In case a raw FIT rate needs to be estimated for a component which is targeted to be used in a safety critical application (i.e. compliant to ISO 26262 standard) it should be calculated according to generic safety standards (IEC62380, IEC61709, SN29500, FIDES, etc.)

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