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Product Detailed Parameters
- Description：IC REG BUCK ADJ 550MA 16SO
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：7.4V
- Voltage - Input (Max)：48V
- Voltage - Output (Min/Fixed)：1.24V
- Voltage - Output (Max)：30V
- Current - Output：550mA (Switch)
- Frequency - Switching：100kHz
- Synchronous Rectifier：No
- Operating Temperature：0°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：16-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：16-SO
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Overview
The LT1777CS#PBF is a low noise, high performance step-down switching regulator manufactured by Analog Devices Inc. It operates with an input voltage range of 6.7V to 48V and provides an adjustable output voltage from 1.24V to 30V. The device delivers a switch current of 550mA at a fixed switching frequency of 100kHz. It features a shutdown function and operates within a temperature range of 0°C to 125°C. The component is housed in a 16-lead SOIC package.
Feature Summary
- Integrated low noise architecture designed for sensitive analog circuits
- Fixed 100kHz switching frequency minimizes external component size
- Shutdown capability reduces quiescent current consumption
- Wide input voltage range supports various power supply topologies
Applications
- Portable instrumentation requiring low noise power
- Battery-powered systems with wide input ranges
- Industrial control modules needing regulated DC-DC conversion
- Communication equipment power distribution networks
Procurement Notes
Verify the complete part number including suffixes such as #PBF to ensure RoHS compliance and lead-free status. Confirm the package type matches the design footprint requirements. Check manufacturer documentation for any recent product change notifications or material declarations that may affect procurement specifications.
Selection Notes
Select this component when low output noise is critical for downstream circuitry. Ensure the required output voltage falls within the 1.24V to 30V adjustable range. Verify that the load current does not exceed the 550mA switch current limit. Consider the thermal performance of the 16-SOIC package under maximum load conditions.
Part Context
This part belongs to the LT1777 family of switching regulators. It is distinct from other Analog Devices PMICs by its specific combination of low noise performance and wide input voltage tolerance. The CS#PBF designation indicates the commercial temperature grade and tube packaging format.
Replacement Considerations
Consult official Analog Devices substitution guides for verified alternatives. Direct pin-compatible replacements must match the 16-SOIC package and electrical specifications. Generic equivalents may not replicate the specific low noise characteristics.
