Analog Devices Inc. LT8630 Synchronous Step-Down Switching Regulators

Analog Devices Inc. LT®8630 current mode PWM step-down DC/DC converters with internal synchronous switches provide current for output loads up to 0.6A. The components have a wide input range of 3V to 100V. The devices are suitable for regulating power from a wide variety of sources, including automotive and industrial systems and 36V to 72V telecom supplies. The Analog Devices LT8630 is available in a 20-lead TSSOP package with an exposed pad for low thermal resistance and high voltage lead spacing.

Variable frequency boundary mode switching maximizes efficiency across a wide range of input voltages. Low ripple Burst Mode operation enables high-efficiency operation down to very low output currents while keeping the output ripple below 5mV. The soft-start feature controls the ramp rate of the output voltage, eliminating input current surge during start-up while providing output tracking. A power good flag signals when the output voltage is within ±7.5% of the regulated output. Under voltage lockout can be programmed using the EN/UV pin. Shutdown mode reduces the total quiescent current to <5µA.


  • 3V to 100V input voltage range
  • Boundary mode switching for highest efficiency
  • 0.8V to 60V output voltage range
  • Internal synchronous switches
  • Burst Mode® Operation
    • 16µA IQ at 12VIN to 5VOUT
    • 7µA IQ at 48VIN to 5VOUT
  • Low dropout
  • Peak current-mode control
  • Programmable undervoltage lockout
  • Power good flag
  • Flexible output voltage tracking
  • Short-circuit protection
  • 5µA shutdown current
  • Tolerates pin open/short faults
  • Thermally enhanced 20-lead TSSOP with high voltage lead spacing


  • Automotive supplies
  • Telecom supplies
  • Distributed supply regulation

Block Diagram

Block Diagram - Analog Devices Inc. LT8630 Synchronous Step-Down Switching Regulators
Published: 2017-04-25 | Updated: 2022-03-11