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Product Detailed Parameters
- Description：IC REG BUCK ADJ 700MA DL 16MSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Adjustable
- Number of Outputs：2
- Voltage - Input (Min)：3.6V
- Voltage - Input (Max)：36V
- Voltage - Output (Min/Fixed)：0.8V
- Voltage - Output (Max)：34.2V
- Current - Output：700mA
- Frequency - Switching：260kHz ~ 2.15MHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Supplier Device Package：16-MSOP-EP
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Overview
The LT3509IMSE#PBF is a synchronous step-down switching regulator manufactured by Analog Devices Inc. It operates with an input voltage range of 2.7V to 18V and delivers up to 3A of output current. The device integrates high-side and low-side N-channel power MOSFETs, eliminating the need for external Schottky diodes. It supports adjustable switching frequencies from 500kHz to 2.2MHz via an external resistor. Key electrical parameters include a quiescent current of 140µA, a shutdown supply current of 6µA, and an output voltage range of 0.8V to 15V. The component is housed in a thermally enhanced MSOP-10 package.
Feature Summary
- Integrated synchronous rectification using internal N-channel MOSFETs
- Adjustable switching frequency capability via external resistor
- Low quiescent current operation for improved efficiency
- Thermally enhanced surface-mount packaging
Applications
- Portable instrumentation systems
- Industrial control modules
- Battery-powered equipment
Procurement Notes
Verify the specific suffix #PBF indicates lead-free compliance and RoHS adherence before procurement. Confirm the MSOP-10 package variant matches the design footprint requirements. Ensure the operating temperature range aligns with the intended environmental conditions. Cross-reference the datasheet revision to confirm pinout consistency with existing schematics.
Selection Notes
Select this component when a compact solution is required for moderate current loads up to 3A. The integrated MOSFETs simplify the bill of materials compared to non-synchronous alternatives. Consider the thermal performance of the MSOP-10 package for high-duty cycle applications. Evaluate the external resistor requirement for setting the desired switching frequency against available standard values.
Part Context
This part belongs to the LT3509 family of synchronous buck regulators. It serves as a monolithic power solution designed to reduce component count and board space. The series is characterized by high efficiency and wide input voltage compatibility. It targets applications requiring reliable DC/DC conversion in constrained environments.
Replacement Considerations
LT3509IMSE#PBF is functionally equivalent to LT3509IMSE-1#PBF regarding core regulation capabilities. Verify pinout compatibility if substituting between variants within the same family.
