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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-5 is a high-efficiency step-down switching regulator controller manufactured by Analog Devices Inc. It operates in a buck topology to provide regulated power conversion. The device is housed in an 8-pin DIP package with a pitch of 0.300 inches (7.62mm). It supports a maximum switching frequency of 250kHz and delivers a peak current capability of 0.005A. This component is designed for applications requiring efficient DC-DC voltage regulation.
Feature Summary
- High efficiency step-down switching regulator controller
- Current-mode control architecture
- Fixed 250kHz switching frequency operation
Applications
- General purpose DC-DC power supply designs
- Embedded system voltage regulation
- Battery-powered equipment power management
Procurement Notes
Verify the specific suffix and package type when ordering, as the ADP1147 series includes various configurations such as AR and AN variants with different pinouts or thermal characteristics. Confirm RoHS compliance status, as some listings indicate non-compliance for certain bulk packages. Ensure the supplier provides official Analog Devices documentation to validate the exact electrical specifications and operating temperature range for the specific batch.
Selection Notes
Select this component for designs requiring a simple, cost-effective buck converter solution with fixed frequency operation. The DIP package facilitates prototyping and through-hole assembly. Consider the 0.005A current limit when sizing external components; ensure the external switch and inductor can handle the required load current without exceeding the controller's internal limits. Evaluate thermal performance if operating near maximum ratings.
Part Context
The ADP1147 belongs to Analog Devices' family of high-efficiency switching regulator controllers. It shares functional similarities with other parts in the series but differs in package options and specific output voltage configurations. The 'AN' suffix typically denotes the PDIP-8 package variant. It serves as a core control element in offline or low-power online AC-DC and DC-DC converters.
Replacement Considerations
Direct replacements may include other Analog Devices buck controllers like the ADP1141 or ADP120 series, provided they match the 250kHz frequency and current requirements. Verify pin compatibility and control loop stability when substituting. Cross-reference datasheets to ensure equivalent input voltage ranges and protection features.
