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S-8520B50MC-ASJT2G
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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：180kHz
- 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
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Overview
The S-8520B50MC-ASJT2G is a CMOS step-down switching regulator controller from the S-8520 series by ABLIC Inc. It utilizes Pulse Width Modulation (PWM) control to provide low-ripple power and high efficiency. The device features a fixed output voltage of 5.0V, a maximum duty ratio of 100%, and a switching frequency of 180kHz. It operates with a supply voltage range of 2.5V to 16V and supports an operating temperature range of -40°C to +85°C. The component is housed in a compact SOT-23-5 package.
Feature Summary
- Integrates PWM control circuitry for linear duty ratio variation up to 100% to ensure stable output regulation.
- Includes an internal error amplifier and soft-start circuit to prevent output overshoot during startup.
- Designed as a controller requiring external Pch power MOS FET or PNP transistor for step-down conversion.
Applications
- Battery-powered portable electronic devices
- General-purpose DC-DC step-down power supplies
- Embedded systems requiring regulated voltage rails
Procurement Notes
Verify the specific suffix ASJT2G against official ABLIC documentation to confirm packaging and marking details. Ensure compatibility with required external components such as the inductor and output capacitors for the target application design.
Selection Notes
Select this component when a fixed 5.0V output is required from a variable input source within the 2.5V to 16V range. Consider the S-8520 series for applications needing PWM control and 100% duty cycle capability without synchronous rectification requirements.
Part Context
This part belongs to the S-8520/8521 Series of CMOS step-down switching regulator controllers. The S-8520 series specifically focuses on PWM control, distinguishing it from the S-8521 series which supports both PWM and PFM modes for light-load efficiency optimization.
Replacement Considerations
Check for other S-8520 variants with different output voltages or packages if the 5.0V fixed output does not match system requirements. Verify pinout compatibility before substituting with similar buck controllers from other manufacturers.
