CAT4238TD-GT3

$1.30

Description：IC LED DRVR RGLTR PWM TSOT23-5
Series：-
Mfr：onsemi
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:17c7abf66a64 Category: LED Drivers IC Brand: onsemi

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Product introduction

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：38V
Current - Output / Channel：600mA (Switch)
Frequency：1MHz
Dimming：Analog, PWM
Applications：-
Operating Temperature：-
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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CAT4238TD-GT3

Overview

The CAT4238TD-GT3 is a high-efficiency DC-DC boost LED driver IC manufactured by onsemi. It operates with an input voltage range of 2.8 V to 5.5 V and delivers a regulated output current up to 40 mA. The device supports a maximum output voltage of 30 V, enabling the driving of multiple LEDs in series configurations. Operating at a fixed frequency of 1 MHz, it utilizes a TSOT-23-5 surface-mount package. The component functions within a temperature range of -40°C to +85°C and includes thermal shutdown protection for enhanced reliability.

Feature Summary

Integrates a high-efficiency boost converter topology optimized for LED string driving applications
Provides accurate constant current regulation to ensure consistent LED brightness
Incorporates thermal shutdown circuitry to protect the device during overtemperature conditions

Applications

Battery-powered portable lighting devices
Backlighting systems for mobile displays
General illumination circuits requiring compact form factors

Procurement Notes

Verify component authenticity through authorized distribution channels due to potential availability constraints. Confirm that the specific suffix aligns with required packaging specifications. Check current lifecycle status as end-of-life notifications may impact long-term supply continuity. Ensure compliance with RoHS directives for intended market regulations before finalizing procurement orders.

Selection Notes

Select this component when designing low-voltage battery-operated systems requiring precise LED current control. The 1 MHz switching frequency allows for smaller external passive components compared to lower-frequency alternatives. Consider the 40 mA output limit when determining the number of series-connected LEDs. Evaluate the TSOT-23-5 package size against available PCB real estate constraints.

Part Context

This part belongs to the CAT4237/CAT4238 family of single-channel LED drivers from onsemi. These devices are designed specifically for boosting low input voltages to drive LED strings efficiently. The CAT4238 variant typically offers higher current capabilities or different internal configurations compared to the CAT4237, catering to diverse lighting density requirements in consumer electronics.