Features and Benefits
- Wide input voltage range: 4.5 V to 15.0 V
- ±1.5% output accuracy over full temperature range
- 250 kHz to 1.4 MHz 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 1.2 A/2.5 A/4 A sync buck regulators with low-side FET driver
Channel 3 and Channel 4: 1.2 A sync buck regulators
- Single 8 A output (Channel 1 and Channel 2 in parallel)
- Dynamic voltage scaling (DVS) for Channel 1 and Channel 4
- Precision enable with 0.8 V accurate threshold
- Active output discharge switch
- Programmable phase shift in 90° steps
- Individual channel FPWM/PSM selection
- Frequency synchronization input or output
- See data sheet for additional features
Product DetailsThe ADP5051 combines four high performance buck regulators, and a supervisory circuit with a voltage monitor, watchdog, and manual reset in a 48-lead LFCSP package that meets demanding performance and board space requirements. The device enables direct connection to high input voltages up to 15.0 V with no preregulators.
Channel 1 and Channel 2 integrate high-side power MOSFET and low-side MOSFET drivers. In low-side power devices, use external NFETs to achieve an efficiency optimized solution and deliver a programmable output current of 1.2 A, 2.5 A, or 4 A.
Combining Channel 1 and Channel 2 in a parallel configuration provides a single output with up to 8 A of current. Channel 3 and Channel 4 integrate both high-side and low-side MOSFETs to deliver an output current of 1.2 A.
The ADP5051 supervisory circuits monitor voltage level. The watchdog timer generates a reset when the WDI does not toggle within a preset timeout period. Select manual reset functionality via the processor reset mode or system power on/off switch mode.
The optional I2C interface offers flexible configurations, including adjustable and fixed output voltage, junction temperature overheat warning, low input voltage detection, and dynamic voltage scaling.
- Small cell base stations
- FPGA and processor applications
- Security and surveillance
- Medical applications
Product Lifecycle Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
This page contains evaluation board ordering guide information for evaluating ADP5051.
Tools & Simulations
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Models for the following parts are available in LTspice:
ADIsimPE, which is powered by SIMetrix/SIMPLIS, is a circuit simulation suite optimized for the design and development of analog and mixed signal circuits. SIMetrix mode is ideal for the simulation of general non-switching circuits. It provides full Pspice compatibility for use with industry-standard SPICE models. SIMPLIS (SIMulation Piecewise-Linear System) mode simulates the operation of switching circuits with vastly improved robustness, speed, and accuracy compared to standard SPICE. It is particularly useful for switching power supply, PLLs, and ADC/DAC applications.
ADIsimPower is the fastest and most accurate Power Management design tool. ADI's Design Center lets you design your power circuits in three easy steps.
Microsoft Excel download tool from ADIsimPower to generate a power supply design complete with a schematic, bill of materials, and performance specifications.
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Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.