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Home » NEWEST Products » New by Manufacturer » Analog Devices Inc. » ADP5051 Quad Buck Regulators - Analog Devices
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Analog Devices ADP5051 Quad Buck Regulators

Analog Devices ADP5051 Quad Buck Regulators

Analog Devices ADP5051 integrates four high performance buck regulators and a supervisory circuit with a voltage monitor, a watchdog function, and a manual reset in a 48-lead LFCSP package to meet demanding performance and board space requirements. ADP5051 allows a direct connection to high input voltages up to 15.0V with no preregulators. Channel 1 and Channel 2 provide high-side power MOSFET and low-side MOSFET drivers. In low-side power devices, external NFETs achieve an efficiency optimized solution and deliver a programmable output current of 1.2A, 2.5A, or 4A. The ADP5051 supervisory circuits monitor voltage level. The watchdog timer generates a reset when the WDI does not toggle within a preset timeout period. An optional I2C Interface offers flexible configurations, including adjustable and fixed output voltage, junction temperature overheat warning, low input voltage detection, and dynamic voltage scaling. The design makes the ADP5051 an ideal integrated power solution for small cell base stations, FPGA and processor applications, security & surveillance, and medical applications.

  • Wide input voltage range: 4.5V to 15.0V
  • ±1.5% output accuracy over full temperature range
  • 250kHz to 1.4MHz adjustable switching frequency
  • Adjustable/fixed output options via factory fuse or I²C interface
  • I²C interface with interrupt on fault conditions
  • Power regulation
    • Channel 1 and Channel 2: programmable 1.2A/2.5A/4A sync buck regulators with low-side FET drive
    • Channel 3 and Channel 4: 1.2A sync buck regulators
  • Single 8A output (Channel 1 and Channel 2 in parallel)
  • Dynamic voltage scaling (DVS) for Channel 1 and Channel 4
  • Precision enable with 0.8V accurate threshold
  • Active output discharge switch
  • Programmable phase shift in 90° steps
  • Individual channel FPWM/PSM selection
  • Frequency synchronization input or output
  • Optional latch-off protection on OVP/OCP failure
  • Power-good flag on selected channels
  • Low input voltage detection
  • Open-drain processor reset with external adjustable threshold monitoring
  • Watchdog refresh input
  • Manual reset input
  • Overheat detection on junction temperature
  • UVLO, OCP, and TSD protection

  • Small cell base stations
  • FPGA and processor applications
  • Security and surveillance
  • Medical applications
Typical Application Circuit
Typical Application Circuit
  • Analog Devices Inc.