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Product Detailed Parameters
- Description：IC REG CTRLR BUCK 8SOIC
- 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)：48%
- Synchronous Rectifier：No
- Clock Sync：No
- Serial Interfaces：-
- Control Features：Frequency Control
- Operating Temperature：-40°C ~ 100°C (TA)
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SO
- Grade：-
- Qualification：-
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Overview
The LT1241IS8#PBF is an 8-pin, fixed-frequency, current mode pulse width modulator manufactured by Analog Devices Inc. It operates within a supply voltage range of 8.2V to 25V and features a maximum duty cycle of 48%. The device supports a switching frequency of 500kHz and draws an operating supply current of 7mA. It is designed for surface mount installation in an 8-SOIC package with a width of 3.90mm. The component functions as a high-speed current mode controller suitable for various DC-DC conversion applications.
Feature Summary
- Fixed frequency current mode pulse width modulation architecture
- High-speed operation capability for efficient power conversion
- Integrated internal oscillator for stable switching performance
Applications
- DC-DC converter designs requiring fixed frequency control
- Power supply systems utilizing current mode regulation
- Industrial equipment power management circuits
Procurement Notes
Verify the specific suffix #PBF indicates lead-free compliance and RoHS status according to the manufacturer's latest documentation. Confirm the SOIC-8 package dimensions match your PCB footprint requirements. Ensure the operating temperature range of -40°C to 100°C aligns with your system's thermal environment. Cross-reference the pinout diagram from the official datasheet to prevent wiring errors during integration.
Selection Notes
Select this component when a fixed 500kHz switching frequency is required for noise-sensitive applications. The current mode control offers improved transient response compared to voltage mode alternatives. Consider the 48% maximum duty cycle limitation when designing boost or flyback topologies. The 8.2V minimum supply voltage dictates the input rail requirements for the primary circuit design.
Part Context
The LT1241 series represents an improved plug-compatible version of earlier industry-standard pulse width modulators. This specific model continues the legacy of reliable current mode control while offering enhanced performance characteristics. The IS8 variant denotes the industrial temperature grade and surface mount packaging option provided by Analog Devices.
Replacement Considerations
The LT1241 series devices are described as improved plug compatible versions of industry standard parts. Verify compatibility with original generic equivalents by comparing pin assignments and electrical specifications against the official datasheet before substitution.
