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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：Through Hole
- Package / Case：8-DIP (0.300", 7.62mm)
- Supplier Device Package：8-PDIP
- Grade：-
- Qualification：-
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Overview
The ADP1147AN-3.3 is a high-efficiency step-down switching regulator controller manufactured by Analog Devices Inc. It utilizes current-mode control architecture to regulate output voltage in buck converter topologies. The device features a fixed 3.3V output configuration with a maximum output current capability of 50mA. It operates within an input voltage range of 3.5V to 16V and supports a switching frequency up to 250kHz. The component is housed in an 8-pin PDIP package and is designed for operation across a temperature range from -40°C to +85°C.
Feature Summary
- Implements current-mode control strategy for stable regulation
- Designed specifically for high-efficiency step-down (buck) applications
- Provides fixed 3.3V output voltage configuration
Applications
- Battery-powered portable electronic devices requiring efficient voltage reduction
- General-purpose low-power DC-DC conversion systems
- Embedded systems utilizing buck topology for power management
Procurement Notes
Verify the specific suffix and package type against official Analog Devices documentation to ensure compatibility with your design requirements. Confirm that the fixed 3.3V output meets your system's voltage needs, as adjustable variants may exist within the family. Check for RoHS compliance status and lead-free specifications in the latest datasheet before finalizing procurement decisions.
Selection Notes
Select this component when a fixed 3.3V output is required without external feedback resistors. Ensure the load current does not exceed 50mA, as higher currents require different controller or integrated regulator solutions. Verify that the input voltage remains within the 3.5V to 16V operational window. Consider the PDIP-8 package constraints if surface-mount assembly is preferred, as alternative packages may be available.
Part Context
This part belongs to the ADP1147 series of switching regulator controllers from Analog Devices. It is distinct from linear regulators like the ADP124 due to its switching nature, offering higher efficiency at the cost of increased complexity. The ADP1147AN-3.3 serves as a dedicated controller requiring external power switches and passive components to complete the buck converter circuit.
Replacement Considerations
Publicly confirmed substitute part numbers are not provided in the source material. Designers should consult Analog Devices application notes for pin-compatible alternatives or functional equivalents within the same product family.
