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Analog Devices Inc. LT8608S Synchronous Step-Down Regulators

Analog Devices Inc. LT8608S Synchronous Step-Down Regulators are compact, high-efficiency, high-speed monolithic switching regulators that consume only 1.7μA of quiescent current. The LT8608S can deliver a 1.5A of continuous current. The top and bottom power switches are included with all necessary circuitry. This feature will minimize the need for external components. The low ripple Burst Mode operation enables high efficiency down to very low output currents while keeping the output ripple below 10mV.

A SYNC pin allows for the synchronization to an external clock or spread spectrum modulation of switching frequencies for low EMI operation. Internal compensation with peak current mode topology enables the use of small inductors and results in fast transient response and good loop stability.

The EN/UV pin has an accurate 1V threshold and can program VIN undervoltage lockout or shut down the LT8608S reducing the input supply current to 1μA. A capacitor on the TR/SS pin programs the output voltage ramp rate during start-up, while the PG flag signals when VOUT is within ±8.0% of the programmed output voltage and fault conditions. The Analog Devices Inc. LT8608S is available in a small 12-lead LQFN package.

Features

  • Silent Switcher® 2 architecture
    • Ultra-low EMI/EMC emissions on any PCB
    • Eliminates PCB layout sensitivity
    • Internal bypass capacitors reduce radiated EMI
    • Optional spread spectrum modulation
  • 3.0V to 42V wide input voltage range
  • Ultra-low quiescent current Burst Mode® operation
    • <3μA IQ regulating 12VIN to 3.3VOUT
    • Output ripple <10mVP-P
  • High-efficiency 2MHz synchronous operation:
    • >90% efficiency at 0.75A, 5VOUT from 12VIN
  • 1.5A continuous output current
  • 35ns fast minimum switch-on time
  • 200kHz to 2.2MHz adjustable and synchronizable
  • Allows use of small inductors
  • Low dropout
  • Peak current mode operation
  • Internal compensation
  • Output soft-start and tracking
  • Small 12-lead LQFN package

Applications

  • General-purpose step-down
  • Low EMI step-down

Typical Application

Block Diagram - Analog Devices Inc. LT8608S Synchronous Step-Down Regulators

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Associated Board

Analog Devices Inc. DC2711A Demo Board for LT8608S

A 42V, 1.5A synchronous step-down regulator, including the LT8608S.

Learn MoreGiới thiệu về Analog Devices Inc. DC2711A Demo Board for LT8608S View Productsliên quan đến Analog Devices Inc. DC2711A Demo Board for LT8608S
Đã phát hành: 2022-06-21 | Đã cập nhật: 2022-10-26