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Product Detailed Parameters
- Description：IC LED DRVR RGLTR PWM TSOT23-5
- Series：-
- Mfr：onsemi
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：DC DC Regulator
- Topology：Step-Up (Boost)
- Internal Switch(s)：Yes
- Number of Outputs：1
- Voltage - Supply (Min)：2.2V
- Voltage - Supply (Max)：5.5V
- Voltage - Output：24V
- Current - Output / Channel：30mA
- Frequency：1MHz
- Dimming：Analog, PWM
- Applications：Backlight
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：SOT-23-5 Thin, TSOT-23-5
- Supplier Device Package：TSOT-23-5
- Grade：-
- Qualification：-
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Overview
The CAT4137TD-GT3 is an LED lighting driver IC manufactured by onsemi, featuring a boost topology designed for driving up to five series-connected white LEDs. It operates within an input voltage range of 2 V to 5.5 V and supports output voltages up to 22 V. The device integrates a soft-start function and functions as a high-efficiency DC-DC converter. It is housed in a TSOT-23-5 package and is rated for operation between -40°C and +85°C. This component is classified as end-of-life.
Feature Summary
- Boost topology optimized for multi-segment white LED arrays
- Integrated soft-start functionality for controlled power-up
- Single-channel current regulation for series LED strings
Applications
- White LED array illumination
- Portable lighting devices
- General LED backlighting applications
Procurement Notes
Verify the end-of-life status before design finalization, as the manufacturer has indicated discontinuation. Confirm availability through authorized distributors or secondary markets, noting that standard supply channels may not stock this item. Ensure compatibility with existing board layouts using the TSOT-23-5 package. Review the official datasheet for any specific handling or storage requirements associated with obsolete components.
Selection Notes
Select this component only if the application requires a boost driver for up to five series white LEDs within a 2 V to 5.5 V input range. Consider the TSOT-23-5 package constraints and the -40°C to +85°C operating temperature window. Due to the end-of-life status, evaluate alternative future-proof solutions unless legacy support is strictly required. Verify that the 22 V maximum output voltage meets the specific LED string requirements.
Part Context
The CAT4137 series belongs to onsemi's portfolio of LED lighting driver integrated circuits. These devices are engineered for high-efficiency power conversion in portable and general illumination systems. The TD suffix indicates the specific tape-and-reel packaging variant within the broader CAT4137 family, which shares core functional characteristics across different package options.
Replacement Considerations
No public confirmed substitute part numbers are available in the provided documentation. Given the end-of-life status, consult onsemi technical support for potential pin-compatible alternatives or updated product recommendations.
