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Product Detailed Parameters
- Description：IC REG CTRLR FLYBACK 16SSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR)
- 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)：9.7V ~ 22V
- Frequency - Switching：90kHz ~ 115kHz
- Duty Cycle (Max)：90%
- Synchronous Rectifier：No
- Clock Sync：No
- Serial Interfaces：-
- Control Features：Enable, Soft Start
- Operating Temperature：0°C ~ 100°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：16-SSOP (0.154", 3.90mm Width)
- Supplier Device Package：16-SSOP
- Grade：-
- Qualification：-
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Overview
The LT1725CGN#TRPBF is a monolithic switching regulator controller designed for isolated flyback topologies. It operates within a switching frequency range of 90 kHz to 115 kHz and supports a maximum duty cycle of 90%. The device requires a supply voltage between 9.7 V and 22 V. It features an operating temperature range from 0°C to 100°C (junction temperature). The component is housed in a 16-SSOP package with a width of 3.90 mm.
Feature Summary
- Designed specifically for isolated flyback converter applications
- Provides enable control and soft-start functionality
- Drives external MOSFET gates for step-up or step-down conversion
- Supports positive or negative isolated output configurations
Applications
- Isolated DC-DC converters
- General purpose flyback power supplies
- Step-up/step-down converter designs requiring isolation
Procurement Notes
Verify the suffix #TRPBF indicates tape and reel packaging, distinct from tube packaging variants. Confirm the GN suffix corresponds to the commercial temperature grade (0°C to 100°C) rather than the industrial grade (-40°C to 125°C). Ensure the 16-SSOP package matches the target PCB footprint. Cross-reference the RoHS compliance status with current manufacturer declarations.
Selection Notes
Select this controller when an isolated flyback topology is required with a fixed frequency range near 90-115 kHz. It is suitable for designs needing enable pins and soft-start capabilities without integrated synchronous rectification. Compare against the LT1725IS variant if a wider industrial temperature range (-40°C to 125°C) is necessary. Ensure the external MOSFET gate drive requirements align with the controller's output specifications.
Part Context
The LT1725 series comprises general-purpose isolated flyback controllers from Analog Devices. The LT1725CGN#TRPBF represents the commercial temperature grade version packaged in tape and reel format. It belongs to the broader LT1725 family, which also includes industrial grade options like the LT1725IS#PBF. These controllers are part of Analog Devices' PMIC portfolio for switch-mode power supplies.
Replacement Considerations
LT1725IS#PBF: Industrial temperature grade (-40°C to 125°C), tube packaging. LT1725IS#TRPBF: Industrial temperature grade, tape and reel packaging. LT1725CS#PBF: Commercial temperature grade, tube packaging.
