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Product Detailed Parameters
- Description：IC REG CTRLR FLYBACK 16SOIC
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Output Type：Transistor Driver
- Function：Step-Up/Step-Down
- Output Configuration：Positive or Negative, Isolation Capable
- Topology：Flyback
- Number of Outputs：1
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：4.1V ~ 20V
- Frequency - Switching：90kHz ~ 115kHz
- Duty Cycle (Max)：90%
- Synchronous Rectifier：No
- Clock Sync：No
- Serial Interfaces：-
- Control Features：Enable, Soft Start
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：16-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：16-SO
- Grade：-
- Qualification：-
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Overview
The LT1737IS#PBF is a monolithic switching regulator controller designed for high-power isolated flyback topologies. It operates within a switching frequency range of 50 kHz to 250 kHz and supports a maximum duty cycle of 90%. The device functions with a supply voltage between 4.1 V and 20 V, delivering an output current of 500 mA at 12.1 V. It is rated for industrial temperatures from -40°C to +125°C and utilizes a 16-pin SOIC package.
Feature Summary
- Designed specifically for high-power isolated flyback converter applications
- Provides precise control over switching frequency and duty cycle for efficient power conversion
- Integrates gate drive capabilities for external MOSFETs without requiring synchronous rectification
Applications
- High-power isolated DC/DC converters
- Industrial power supply designs
- Telecommunications equipment power stages
Procurement Notes
Verify the specific suffix (#PBF) indicates lead-free compliance when sourcing. Confirm the operating temperature grade (I for Industrial) matches system requirements. Ensure the 16-pin SOIC footprint aligns with PCB layout specifications. Cross-reference the manufacturer part number with official Analog Devices documentation to avoid counterfeit components.
Selection Notes
Select this component for designs requiring a dedicated flyback controller rather than an integrated switch. Consider the 250 kHz maximum frequency for transformer size optimization. Evaluate the 500 mA output capability against load requirements. Verify that the external MOSFET selection complements the gate drive characteristics provided by the IC.
Part Context
This part belongs to the LT1737 series of switching controllers. It is manufactured by Analog Devices Inc., formerly Linear Technology. The device is distinct from integrated switch regulators as it drives an external power FET. It serves as a core control element in isolated power conversion architectures.
Replacement Considerations
LT1737CS#PBF: Commercial temperature variant (-40°C to 85°C). LT1737IS#TR: Tape and reel packaging option. LT1737IS#TRPBF: Lead-free tape and reel packaging.
