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Product Detailed Parameters
- Description：LOW-IQ 2MHZ 60V ISOLATED SEPIC F
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Output Type：Transistor Driver
- Function：Step-Up, Step-Up/Step-Down
- Output Configuration：Positive
- Topology：Boost, Flyback, SEPIC
- Number of Outputs：1
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：3V ~ 60V
- Frequency - Switching：100kHz ~ 2MHz
- Duty Cycle (Max)：95%
- Synchronous Rectifier：No
- Clock Sync：No
- Serial Interfaces：-
- Control Features：Current Limit, Enable, Frequency Control, Power Good, Soft Start
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：12-TSSOP (0.118", 3.00mm Width) Exposed Pad
- Supplier Device Package：12-MSOP-EP
- Grade：-
- Qualification：-
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Overview
The LT8357EMSE#PBF is a low quiescent current, isolated SEPIC flyback DC/DC controller from Analog Devices Inc. It operates with a fixed 2 MHz switching frequency and supports input voltages up to 60V. The device features an internal high-voltage switch and is designed for applications requiring galvanic isolation. It is housed in a 12-lead MSOP-EP package and functions as a positive output step-up or step-down regulator.
Feature Summary
- Integrates a high-voltage switch for isolated SEPIC and flyback topologies
- Maintains low quiescent current operation for efficiency
- Supports adjustable switching frequency up to 2 MHz
- Provides galvanic isolation between input and output stages
Applications
- Industrial sensor interfaces requiring isolation
- Medical equipment power supplies
- Battery-powered systems needing boost/buck conversion
- Isolated communication bus transceivers
Procurement Notes
Verify the specific suffix and tape-and-reel quantity against the official datasheet before ordering. Confirm that the MSOP-EP package thermal pad connection meets your PCB layout requirements. Ensure compatibility with the intended switching frequency settings. Check for any recent product change notices regarding pinout or electrical specifications.
Selection Notes
Select this component when isolated boost or buck-boost conversion is required with minimal standby power consumption. The 2 MHz frequency allows for smaller passive components compared to lower-frequency alternatives. Consider the 60V switch rating for input voltage headroom. Evaluate thermal performance due to the surface-mount package constraints.
Part Context
This part belongs to the LT8357 family of isolated controllers. It complements other non-isolated regulators by providing galvanic separation. The EMSE#PBF designation indicates a lead-free, halogen-free RoHS-compliant version in a small outline package with an exposed pad for heat dissipation.
Replacement Considerations
Direct replacements must support isolated SEPIC/flyback topologies with similar voltage ratings. Verify that substitute parts offer comparable quiescent current levels. Ensure the replacement package matches the 12-MSOP-EP footprint for board compatibility. Check if alternative controllers require external switches if the original integrates one.
