ChipApex | Global Electronic Components Supplier
SEARCH
Search Product
Search Post
— IC芯片 | 连接器 | 传感器 | 被动器件 —
Consult the customer manager about the wholesale price.
consultation hotline：86-132-6715-2157
email：[email protected]
Contact the product manager for consultation. One-stop consultation is available.
Do you want a lower wholesale price? Please send us your inquiry and we will reply immediately.
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)：2.8V
- Voltage - Supply (Max)：5.5V
- Voltage - Output：30V
- Current - Output / Channel：40mA
- 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：-
Download product information
Overview
The CAT4237TD-T3 is a high-voltage CMOS constant-current DC/DC converter designed for driving white LEDs. It operates from a 2.8 V to 5.5 V input supply and delivers up to 40 mA output current. The boost topology supports an output voltage of 30 V, enabling the series connection of multiple LEDs. Operating at a fixed 1 MHz frequency, it features thermal shutdown protection. Packaged in a TSOT-23-5 SMD format, it functions within a -40°C to +85°C temperature range.
Feature Summary
- High-voltage output stage allows driving up to 8 white LEDs in series
- Integrated thermal shutdown protection for enhanced reliability
- Fixed 1 MHz switching frequency for compact external component design
Applications
- Digital camera LED flash drivers
- Portable device backlighting
- High brightness LED indicator circuits
Procurement Notes
Verify component authenticity through authorized onsemi channels or certified distributors. Confirm package marking and datasheet revision alignment. Check for obsolescence status as end-of-life notices may apply. Ensure storage conditions meet moisture sensitivity level requirements prior to assembly.
Selection Notes
Select this driver when driving up to eight series-connected white LEDs is required. Choose based on the 40 mA constant current capability and 30 V maximum output voltage. Consider the TSOT-23-5 package for space-constrained designs. Verify input voltage compatibility with the 2.8 V to 5.5 V operating range.
Part Context
Part of the CAT4237 family of high-voltage LED drivers. Shares architectural similarities with CAT4238 but differs in output current ratings. Designed specifically for portable electronics requiring efficient LED illumination. Utilizes onsemi's CMOS technology for low power consumption and high efficiency in boost converter applications.
Replacement Considerations
CAT4237TS is a pin-compatible alternative within the same series. Verify output current specifications match application requirements. Check package variant availability if surface mount style differs.
