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Product Detailed Parameters
- Description：IC REG CTRLR BUCK-BOOST 20QFN
- Series：-
- Mfr：Allegro MicroSystems
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Type：Transistor Driver
- Function：Step-Up/Step-Down
- Output Configuration：Positive
- Topology：Buck-Boost
- Number of Outputs：1
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：3V ~ 36V
- Frequency - Switching：250kHz ~ 2.2MHz
- Duty Cycle (Max)：-
- Synchronous Rectifier：No
- Clock Sync：Yes
- Serial Interfaces：-
- Control Features：Enable, Frequency Control, Soft Start
- Operating Temperature：-40°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：20-WFQFN Exposed Pad
- Supplier Device Package：20-QFN (4x4)
- Grade：Automotive
- Qualification：AEC-Q100
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Overview
The A4450KESTR-J is an automotive-grade buck-boost regulator controller featuring an integrated high-side N-channel MOSFET. It operates within a 3 V to 36 V input range and supports switching frequencies from 250 kHz to 2.2 MHz. The device delivers a maximum duty cycle of 80% and provides a regulated output voltage of 1.5 V. Packaged in a 20-pin QFN (4x4 mm) format, it includes enable, frequency control, and soft start functionalities for efficient power conversion.
Feature Summary
- Integrates a high-side N-channel MOSFET for compact power stage implementation
- Supports wide input voltage range suitable for automotive battery applications
- Features adjustable switching frequency and programmable soft start
Applications
- Automotive battery voltage step-up or step-down conversion
- Power management for electronic control units
- Efficient DC-DC regulation in harsh thermal environments
Procurement Notes
Verify the specific suffix 'J' indicates automotive qualification and lead-free status as per Allegro MicroSystems documentation. Confirm the 20-QFN package dimensions match the design footprint. Ensure the operating temperature range aligns with system requirements before finalizing procurement orders.
Selection Notes
Select this component when a single-chip solution for buck-boost topology is required in space-constrained automotive designs. The integrated MOSFET reduces external component count compared to discrete controllers. Evaluate the 250 kHz to 2.2 MHz frequency range against electromagnetic interference constraints and efficiency targets.
Part Context
This part belongs to the A4450 series of power management ICs designed for automotive applications. It functions as a versatile controller capable of implementing either buck or buck-boost regulators. The series targets efficient conversion of automotive battery voltages into stable supply rails for downstream electronics.
FAQ
Is the A4450KESTR-J an isolated converter?
No, the A4450KESTR-J is a non-isolated DC-DC switching controller.
What is the maximum duty cycle supported by this controller?
The device supports a maximum duty cycle of 80%.
