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Product Detailed Parameters
- Description：IC REG CTRLR BUCK 8DIP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Output Type：Transistor Driver
- Function：Step-Down
- Output Configuration：Positive, Isolation Capable
- Topology：Buck
- Number of Outputs：1
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：8.2V ~ 25V
- Frequency - Switching：500kHz
- Duty Cycle (Max)：96%
- Synchronous Rectifier：No
- Clock Sync：No
- Serial Interfaces：-
- Control Features：Frequency Control
- Operating Temperature：0°C ~ 100°C (TJ)
- 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 LT1243CN8#PBF is a high-speed current mode pulse width modulator manufactured by Analog Devices Inc. It operates in a buck topology with a single output capable of delivering up to 1 A. The device supports switching frequencies up to 500 kHz and features a maximum duty cycle of 48%. It functions within an input voltage range of 8.2 V to 25 V, consuming a typical operating supply current of 7 mA. The component is designed for through-hole installation in an 8-pin PDIP package and operates reliably across a temperature range from 0°C to +100°C.
Feature Summary
- High-speed current mode operation for efficient power conversion
- Integrated pulse width modulation control logic
- Non-isolated buck converter architecture
Applications
- Point-of-load DC-DC conversion modules
- Industrial power supply systems
- Telecommunications equipment power stages
Procurement Notes
Verify the specific suffix #PBF indicates lead-free compliance when sourcing. Confirm the PDIP-8 package dimensions match your PCB footprint requirements. Ensure the supplier provides official datasheets to validate the 500 kHz frequency capability and 48% duty cycle limits. Check regional availability as distribution status may vary.
Selection Notes
Select this component for applications requiring fast transient response and high-frequency operation. The current mode control offers inherent line feed-forward compensation. Consider the 8.2 V minimum start-up voltage when designing input circuits. The non-isolated nature requires careful ground plane layout to minimize noise coupling in sensitive analog sections.
Part Context
This part belongs to the LT1241/LT1243 series of high-speed PWM controllers. It shares functional similarities with the LT1241 but is optimized for specific current-mode applications. The CN8#PBF designation identifies the commercial temperature grade and through-hole packaging variant within the broader Analog Devices power management portfolio.
Replacement Considerations
The LT1241CN8#PBF is a related model in the same series. Verify pin compatibility and control loop stability before substitution. Other current-mode controllers may require significant circuit redesign due to differences in timing characteristics and feedback configurations.
