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S-8521D25MC-BXKT2U
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Product Detailed Parameters
- Description：IC REG CTRLR BUCK SOT23-5
- Series：-
- Mfr：ABLIC Inc.
- Package：Tape & Reel (TR)
- Output Type：Transistor Driver
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Number of Outputs：1
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：2.5V ~ 16V
- Frequency - Switching：60kHz
- Duty Cycle (Max)：100%
- Synchronous Rectifier：No
- Clock Sync：No
- Serial Interfaces：-
- Control Features：Enable
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：SC-74A, SOT-753
- Supplier Device Package：SOT-23-5
- Grade：-
- Qualification：-
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Overview
The S-8521D25MC-BXKT2U is a synchronous rectification step-down switching regulator controller manufactured by ABLIC Inc. It operates within an input voltage range of 2.5V to 16V and supports a maximum duty cycle of 100%. The device utilizes pulse-width modulation (PWM) with a typical switching frequency of 60kHz. Designed for surface-mount installation in a compact SOT-23-5 package, it provides a single positive output configuration. The component functions reliably across an ambient temperature range from -40°C to +85°C.
Feature Summary
- Synchronous rectification topology for enhanced efficiency
- Supports 100% duty cycle operation for low dropout performance
- Integrated enable control feature for power management
Applications
- Battery-powered portable electronic devices
- General-purpose DC-DC conversion circuits
- Embedded systems requiring efficient step-down regulation
Procurement Notes
Verify the specific suffix 'BXKT2U' against official ABLIC documentation to confirm exact packaging and tape specifications. Ensure compatibility with standard SMD reflow processes for the SOT-23-5 footprint. Confirm RoHS compliance status through current manufacturer declarations before integration into production designs.
Selection Notes
Select this controller when synchronous rectification is required to minimize conduction losses in buck converter applications. The wide input voltage range accommodates various battery chemistries. Verify that external MOSFET selection aligns with the 60kHz switching frequency and load requirements to maintain thermal stability within the specified operating temperature range.
Part Context
This component belongs to the S-8521 series of switching regulators, which are designed as complete solutions for step-down applications. Unlike basic controllers, this variant integrates synchronous drive capabilities directly, reducing the need for external gate drivers and simplifying the overall bill of materials for compact power supply designs.
Replacement Considerations
Direct replacements include the S-8521D27MC-BXMT2U and S-8521D30MC-BXMT2U, which share identical pinouts and functional characteristics but offer different fixed output voltages. Cross-model substitution requires verification of the specific output voltage requirement.
