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Product details

Parameters

Bus voltage (Max) (V) 30 Power switch MOSFET Input VCC (Min) (V) 4 Input VCC (Max) (V) 6.85 Peak output current (A) 4.5 Rise time (ns) 17 Operating temperature range (C) -40 to 125 Rating Catalog Number of channels (#) 2 Fall time (ns) 14 Prop delay (ns) 8 Iq (uA) 540 Input threshold CMOS Channel input logic CMOS Negative voltage handling at HS pin (V) -0.3 Features open-in-new Find other Half-bridge drivers

Package | Pins | Size

SOIC (D) 8 19 mm² 4.9 x 3.9 WSON (NGT) 8 16 mm² 4 x 4 open-in-new Find other Half-bridge drivers

Features

  • Adaptive Shoot-through Protection
  • 10ns Dead Time
  • 8ns Propagation Delay
  • 30ns Minimum On-time
  • 0.4Ω Pull-down and 0.9Ω Pull-up Drivers
  • 4.5A Peak Driving Current
  • MOSFET Tolerant Design
  • 5µA Quiescent Current
  • 30V Maximum Input Voltage in Buck Configuration
  • 4V to 6.85V Operating Voltage
  • SOIC-8 and WSON Packages

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Description

The LM27222 is a dual N-channel MOSFET driver designed to drive MOSFETs in push-pull configurations as typically used in synchronous buck regulators. The LM27222 takes the PWM output from a controller and provides the proper timing and drive levels to the power stage MOSFETs. Adaptive shoot-through protection prevents damaging and efficiency reducing shoot-through currents, thus ensuring a robust design capable of being used with nearly any MOSFET. The adaptive shoot-through protection circuitry also reduces the dead time down to as low as 10ns, ensuring the highest operating efficiency. The peak sourcing and sinking current for each driver of the LM27222 is about 3A and 4.5Amps respectively with a Vgs of 5V. System performance is also enhanced by keeping propagation delays down to 8ns. Efficiency is once again improved at all load currents by supporting synchronous, non-synchronous, and diode emulation modes through the LEN pin. The minimum output pulse width realized at the output of the MOSFETs is as low as 30ns. This enables high operating frequencies at very high conversion ratios in buck regulator designs. To support low power states in notebook systems, the LM27222 draws only 5µA from the 5V rail when the IN and LEN inputs are low or floating.

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Technical documentation

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Type Title Date
* Datasheet LM27222 High-Speed 4.5A Synchronous MOSFET Driver datasheet (Rev. B) Mar. 07, 2013
Application notes External Gate Resistor Selection Guide (Rev. A) Feb. 28, 2020
Application notes Understanding Peak IOH and IOL Currents (Rev. A) Feb. 28, 2020
More literature Fundamentals of MOSFET and IGBT Gate Driver Circuits (Replaces SLUP169) (Rev. A) Oct. 29, 2018
Technical articles How to achieve higher system robustness in DC drives, part 3: minimum input pulse Sep. 19, 2018
Technical articles How to achieve higher system robustness in DC drives, part 2: interlock and deadtime May 30, 2018
Technical articles Boosting efficiency for your solar inverter designs May 24, 2018
Technical articles How to achieve higher system robustness in DC drives, part 1: negative voltage Apr. 17, 2018

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SOIC (D) 8 View options
WSON (NGT) 8 View options

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