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Product Detailed Parameters
- Description：STEP-DOWN SWITCHING REG
- Series：-
- Mfr：Analog Devices Inc.
- Package：Bulk
- Output Type：Transistor Driver
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Number of Outputs：1
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：3.5V ~ 16V
- Frequency - Switching：Up to 250kHz
- Duty Cycle (Max)：-
- Synchronous Rectifier：No
- Clock Sync：No
- Serial Interfaces：-
- Control Features：Current Limit, Enable, Frequency Control
- Operating Temperature：0°C ~ 70°C (TA)
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SOIC
- Grade：-
- Qualification：-
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Overview
The ADP1147AR-3.3 is a high-efficiency step-down switching regulator controller manufactured by Analog Devices Inc. It operates with a fixed switching frequency of 250 kHz and accepts input voltages ranging from 3.5 V to 16 V. The device provides a nominal output voltage of 3.3 V. It is housed in an 8-pin SOIC package and is designed for surface-mount installation. The component supports current-mode control architecture to ensure stable regulation under varying load conditions.
Feature Summary
- High-efficiency step-down switching regulator controller
- Current-mode control architecture for superior transient response
- Fixed 250 kHz switching frequency operation
Applications
- Portable battery-powered equipment
- DC-to-DC conversion modules
- General-purpose power supply designs
Procurement Notes
Verify the specific manufacturer source, as this part number may be distributed through authorized channels or secondary markets like Rochester Electronics. Confirm that the received unit matches the exact ADP1147AR-3.3 designation and package type. Ensure compliance with RoHS standards if required by your application specifications before finalizing procurement.
Selection Notes
Select this component when a compact, high-efficiency buck converter solution is required for inputs up to 16 V. It is suitable for applications demanding a stable 3.3 V output with minimal external component count. Consider the 250 kHz frequency for balancing size and efficiency against noise sensitivity requirements in the target circuit design.
Part Context
This device belongs to the ADP1147 family of high-efficiency step-down switching regulators. The family offers superior load and line transient response capabilities. The AR-3.3 variant specifically targets 3.3 V output applications within the broader portfolio of Analog Devices power management solutions.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing circuit layouts if considering alternative controllers from the same manufacturer or other vendors.
