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Product Detailed Parameters
- Description：IC REG CTRLR BUCK 20LFCSP
- 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：20-WFQFN Exposed Pad, CSP
- Supplier Device Package：20-LFCSP (4x4)
- Grade：-
- Qualification：-
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Overview
The ADP1853ACPZ-R7 is a synchronous step-down DC-to-DC controller from Analog Devices, designed for high-current applications up to 25A. It operates with an input voltage range of 2.75V to 20V and supports switching frequencies between 200kHz and 1.5MHz. The device features a single output phase and offers a maximum duty cycle of 90%. It is housed in a 20-lead LFCSP package (CP-20-8) and functions within a temperature range of -40°C to +125°C. This component integrates voltage tracking capabilities and supports both current mode and voltage mode operation for flexible power management solutions.
Feature Summary
- Integrates synchronous buck topology with wide input voltage capability for versatile power supply designs.
- Supports dual operating modes including current mode and voltage mode for optimized control strategies.
- Includes built-in voltage tracking functionality to simplify multi-rail system sequencing.
Applications
- Voltage mode operated 25A synchronous step-down circuits
- Multi-rail power systems requiring voltage tracking
- General purpose synchronous buck converter designs
Procurement Notes
Verify the specific suffix 'R7' indicates tape and reel packaging when sourcing. Confirm the 20-lead LFCSP EP package type matches your PCB footprint requirements. Ensure the -40°C to +125°C industrial temperature rating aligns with your environmental specifications. Cross-reference the manufacturer part number ADP1853ACPZ-R7 directly with Analog Devices documentation to confirm RoHS compliance status and latest revision details before finalizing procurement orders.
Selection Notes
Select this controller for applications requiring up to 25A output current with a wide 2.75V to 20V input range. Consider the 200kHz to 1.5MHz adjustable switching frequency for balancing efficiency and component size. The integrated voltage tracking feature is critical if interfacing with other rails that require synchronized startup or shutdown sequences. Evaluate the 90% maximum duty cycle against your minimum output voltage requirements to ensure adequate headroom for regulation under all load conditions.
Part Context
This component belongs to the ADP1853 series of synchronous step-down controllers manufactured by Analog Devices. It is distinct from related models like the ADP1851, which shares similar topological characteristics but may differ in specific pinout or feature sets. The ADP1853ACPZ-R7 variant specifically denotes the reel-packaged version of the standard ADP1853ACPZ device, intended for automated surface-mount assembly processes in high-volume manufacturing environments.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing gate drivers and external MOSFETs if considering alternative controllers within the same family.
