LM27222MX ,High-Speed 4.5A Synchronous MOSFET DriverApplicationsmodes through the LEN pin. The minimum output pulsen High Current DC/DC Power Suppliesw ..
LM27222SD ,High-Speed 4.5A Synchronous MOSFET DriverPin DescriptionPin # Pin Name Pin Function1 SW High-side driver return. Should be connected to the ..
LM27222SD/NOPB ,High-Speed 4.5A Synchronous MOSFET Driver 8-WSON -40 to 125Connection DiagramSW 1 8 GNDHG 2 7 LGCB 3 6VCCIN 4 5 LENFigure 1. Top ViewSOIC-8 (Package # D0008A) ..
LM2722M ,High Speed Synchronous/Asynchronous MOSFET DriverFeaturesSynchronous and Asynchronous operations. Having thisn Synchronous or Asynchronous Operation ..
LM2722MX ,High Speed Synchronous/Asynchronous MOSFET DriverApplicationscross-conduction protection circuitry prevents the top andn Driver for LM2723 Intel Mob ..
LM2722MX ,High Speed Synchronous/Asynchronous MOSFET DriverGeneral Descriptionforces both driver outputs low to ensure proper power-upThe LM2722, part of the ..
LM60BIM3 ,2.7V, SOT-23 Temperature SensorElectrical CharacteristicsUnless otherwise noted, these specifications apply for +V = +3.0 V and I ..
LM60BIM3X ,2.7V, SOT-23 Temperature SensorGeneral DescriptionThe LM60 is a precision integrated-circuit temperature sen-
LM60CIM3 ,2.7V, SOT-23 Temperature SensorFeaturesn Nonlinearity: ±0.8˚C (max)n Calibrated linear scale factor of +6.25 mV/˚Cn Output Impedan ..
LM60CIM3X ,2.7V, SOT-23 Temperature SensorLM60 2.7V, SOT-23 or TO-92 Temperature SensorJuly 2001LM602.7V, SOT-23 or TO-92 Temperature Sensorn ..
LM6104M ,Quad Gray Scale Current Feedback AmplifierFeatures (Typicalunlessotherwisenoted)Y eLow power I 875 mA/amplifierThe LM6104 quad amplifier meet ..
LM6118N ,Fast Settling Dual Operational AmplifiersFeaturesThe LM6118/LM6218 are monolithic fast-settlingTypicalunity-gain-compensated dual operationa ..
LM27222M-LM27222MX-LM27222SD
High-Speed 4.5A Synchronous MOSFET Driver
LM27222
High-Speed 4.5A Synchronous MOSFET Driver
General DescriptionThe LM27222isa dual N-channel MOSFET driver designed drive MOSFETsin push-pull configurationsas typically
usedin synchronous buck regulators. The LM27222 takes
the PWM output froma controller and provides the proper
timing and drive levelstothe power stage MOSFETs. Adap-
tive shoot-through protection prevents damaging and effi-
ciency reducing shoot-through currents, thus ensuringaro-
bust design capableof using nearly any MOSFET. The
adaptive shoot-through protection circuitry also reduces the
dead time downtoas lowas 10ns ensuring the highest
operating efficiency. The peak sourcing and sinking current
for each driverof the LM27222is about3A and 4.5Amps
respectively witha Vgsof 5V. System performanceis also
enhancedby keeping propagation delay downto 8ns. Effi-
ciencyis once again improvedatall load currentsby sup-
portingsynchronous, non-synchronous, and diode emulation
modes through the LEN pin. The minimum output pulse
width realizedat the outputof the MOSFETsisas lowas
30ns. This enables high operating frequenciesat very high
conversion ratiosin buck regulator designs. The LM27222
simplifies sequencing requirementsby keeping gate drives
low until Vin and Vcc are stable and the switching controller
starts operating.To support low power statesin notebook
systems, LM27222 draws only 5µA fromthe5Vrail whenthe and LEN inputs are lowor floating.
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 28V input voltagein buck configuration SO-8 and LLP packages
Applications High Current DC/DC Power Supplies High Input Voltage Switching Regulators Fast Transient DC/DC Power Supplies Single ended forward output rectification Notebook Computer core regulators
Typical ApplicationFIGURE1.
September 2004
LM27222
High-Speed
4.5A
Synchronous
MOSFET
Driver
