LTC

LT8609 - 42V, 2A/3A Peak Synchronous Step-Down Regulator

Linear Technology Corporation’s LT8609 is a 2A, 42V input synchronous step-down switching regulator with unique synchronous rectification topology that delivers 93% efficiency while switching at 2MHz.

  • Wide Input Voltage Range: 3.0V to 42V
  • Ultra-low Quiescent Current Burst Mode® Operation
  • <2.5μA IQ Regulating 12VIN to 3.3VOUT
  • Output Ripple <10mVP-P
  • High Efficiency 2MHz Synchronous Operation (93% Efficiency at 1A, 5VOUT from 12VIN)

Product Description

Linear Technology Corporation’s LT8609 is a 2A, 42V input synchronous step-down switching regulator with unique synchronous rectification topology that delivers 93% efficiency while switching at 2MHz.

This enables designers to avoid noise-sensitive frequency bands, such as AM radio, while providing a highly compact package.

LTC’s Burst Mode® operation keeps quiescent current under 2.5μA while not under load (standby mode), making it ideal for always-on systems. The LT8609’s 3.0V to 42V input voltage range makes it ideal for automotive applications which must regulate through cold-crank and stop-start scenarios with minimum input voltages as low as 3.0V and load dump transients in excess of 40V.

The LT8609 maintains a minimum dropout voltage of only 200mV (at1A) under all conditions, making it ideal for automotive cold-cranking. Noise concerns in automotive and industrial environments are also addressed through spread spectrum frequency modulation and special design techniques to offer low-EMI operation.

A fast minimum on-time of only 45ns also enables 2MHz constant frequency switching from a 16V input to a 1.5V output. The LT8609’s 10-lead thermally enhanced MSOP package and high switching frequency keeps external inductors and capacitors small, providing a compact, thermally efficient footprint.

The LT8609 features internal top and bottom high efficiency power switches with the necessary boost diode, oscillator, control and logic circuitry integrated into a single die.

Other design benefits such as low-ripple Burst Mode operation, which maintains high efficiency at low output currents while keeping output ripple below 10mVPK-PK, and a new high speed process that enables high efficiency over a wide input voltage range, enable fast transient response and excellent loop stability. The LT8609’s feature set is rounded off by internal compensation, a power good flag, output soft start/tracking and thermal protection.

Product Range
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  Manufacturer Part No Order Code Manufacturer / Description
Avail Price For
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LT8609EMSE#PBF
LT8609EMSE#PBF - DC-DC Switching Buck Step Down Regulator, Adjustable, 3V-42Vin, 800mV-41.5Vout, 2Aout, MSOP-10

2473246

LINEAR TECHNOLOGY

DC-DC Switching Buck Step Down Regulator, Adjustable, 3V-42Vin, 800mV-41.5Vout, 2Aout, MSOP-10

DC/DC CONV, SYNC BUCK, 2MHZ, MSOP-10; Topology:Synchronous Buck (Step Down); Input Voltage Min:3V; Input Voltage Max:42V; No. of Outputs:1Outputs; DC / DC Converter IC Case:MSOP; No. of Pins:10Pins; Output Current:2A; Output Voltage Min:800mV; Output Vol

No Longer Stocked

LT8609IMSE#PBF
LT8609IMSE#PBF - DC-DC Switching Buck Step Down Regulator, Adjustable, 3V-42Vin, 800mV-41.5Vout, 2Aout, MSOP-10

2473247

LINEAR TECHNOLOGY

DC-DC Switching Buck Step Down Regulator, Adjustable, 3V-42Vin, 800mV-41.5Vout, 2Aout, MSOP-10

DC/DC CONV, SYNC BUCK, 2MHZ, MSOP-10; Topology:Synchronous Buck (Step Down); Input Voltage Min:3V; Input Voltage Max:42V; No. of Outputs:1Outputs; DC / DC Converter IC Case:MSOP; No. of Pins:10Pins; Output Current:2A; Output Voltage Min:800mV; Output Vol

No Longer Stocked


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