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Product Detailed Parameters
- Description：IC REG PUSH-PULL 1A 16TSSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Function：Step-Up/Step-Down
- Output Configuration：Positive, Isolation Capable
- Topology：Push-Pull
- Output Type：Fixed
- Number of Outputs：1
- Voltage - Input (Min)：2.8V
- Voltage - Input (Max)：17.5V
- Voltage - Output (Min/Fixed)：-
- Voltage - Output (Max)：-
- Current - Output：1A
- Frequency - Switching：20kHz ~ 250kHz
- Synchronous Rectifier：No
- Operating Temperature：0°C ~ 70°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Supplier Device Package：16-TSSOP-EP
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Overview
The LT3439EFE#TRPBF is a push-pull isolated DC/DC converter IC manufactured by Analog Devices Inc. It operates with an input voltage range of 2.8V to 17.5V and delivers up to 1A output current. The device features a switchable frequency between 20kHz and 250kHz, allowing for optimization of external component size versus efficiency. It utilizes a 16-lead TSSOP package with an exposed thermal pad for improved heat dissipation. The controller supports adjustable output voltages and includes shutdown functionality for power management.
Feature Summary
- Push-pull topology provides galvanic isolation without requiring an optocoupler for basic regulation
- Adjustable switching frequency allows trade-off between magnetic component size and conversion efficiency
- Integrated low quiescent current reduces standby power consumption in battery-operated systems
Applications
- Industrial sensor interfaces requiring isolated power supplies
- Medical equipment needing galvanic isolation for safety compliance
- Telecommunications infrastructure powering remote modules
Procurement Notes
Verify the suffix TRPBF indicates tape-and-reel packaging rather than tube packaging when ordering. Confirm the specific temperature grade and pinout compatibility with your PCB footprint. Ensure the supplier source matches Analog Devices Inc. specifications to avoid counterfeit components. Check RoHS compliance documentation for environmental regulations.
Selection Notes
Select this component when isolation is required but optocoupler latency or bandwidth limitations are a concern. The push-pull architecture suits applications with moderate power demands under 1A. Consider the thermal performance of the TSSOP-EP package for high ambient temperatures. Evaluate the transformer design requirements against the selectable frequency range.
Part Context
This part belongs to the LT3439 family of isolated DC/DC controllers. It differs from non-isolated buck or boost converters by providing galvanic separation. The #TRPBF suffix denotes the specific reel packaging format, distinct from the #PBF tube variant. It complements other Analog Devices PMIC solutions for complete power system designs.
FAQ
Does the LT3439EFE#TRPBF require an optocoupler for feedback?
No, the device uses a primary-side regulation scheme that eliminates the need for an optocoupler, relying instead on auxiliary winding feedback.
What is the maximum input voltage for this controller?
The absolute maximum input voltage rating is 17.5V, although typical operation may vary based on specific application conditions and derating guidelines.
