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Product Detailed Parameters
- Description：IC REG CTRLR BUCK 16LFCSP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Type：Transistor Driver
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Number of Outputs：1
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：2.75V ~ 20V
- Frequency - Switching：200kHz ~ 1.5MHz
- Duty Cycle (Max)：90%
- Synchronous Rectifier：Yes
- Clock Sync：Yes
- Serial Interfaces：-
- Control Features：Current Limit, Enable, Frequency Control, Power Good, Ramp, Soft Start, Tracking
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：16-WQFN Exposed Pad, CSP
- Supplier Device Package：16-LFCSP (4x4)
- Grade：-
- Qualification：-
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Overview
The ADP1851ACPZ-R7 is a wide-range input, synchronous step-down DC-to-DC controller manufactured by Analog Devices Inc. It operates from 3.3 V to 20 V inputs and supports up to 25 A output current with an adjustable voltage range of 600 mV to 18 V. The device features a 16-lead LFCSP package and functions within a temperature range of -40°C to +125°C. Designed for high-efficiency power conversion, it includes integrated soft-start and cycle-by-cycle current limit protection.
Feature Summary
- Wide input voltage range supporting common 3.3 V, 5 V, and 12 V sources up to 20 V
- Synchronous buck topology for enhanced efficiency in step-down applications
- Integrated soft-start functionality to manage inrush current during startup
Applications
- Industrial point-of-load regulation
- Distributed power systems requiring wide input ranges
- High-density server and workstation power supplies
Procurement Notes
Verify component authenticity through authorized Analog Devices channels or certified distributors. Confirm the specific suffix R7 indicates tape and reel packaging. Ensure compatibility with existing thermal management solutions given the LFCSP-16 package constraints. Request official datasheets and test reports to validate performance against design specifications before integration.
Selection Notes
Select this controller when designing systems requiring a broad input voltage window up to 20 V. It is suitable for applications needing precise output voltage adjustment between 600 mV and 18 V. Consider the 16-lead LFCSP package for space-constrained layouts. Evaluate thermal requirements based on the target output current and ambient operating conditions within the specified temperature range.
Part Context
The ADP1851 belongs to Analog Devices' family of switching controllers designed for robust power management. This specific model focuses on synchronous buck conversion with wide input tolerance. It complements other PMIC offerings by providing a dedicated solution for high-current step-down applications without integrating the power switches internally.
Replacement Considerations
Consult Analog Devices documentation for direct pin-compatible alternatives or upgraded generations. Verify that any substitute maintains the 20 V maximum input rating and 25 A capability. Cross-reference package dimensions and thermal characteristics to ensure mechanical fit.
