SLM4140
Silan SLM4140 low-dropout linear LED driver with excellent current accuracy for low-power indicator and backlight applications.
Product Overview
Description
The SLM4140 is a linear LED driver designed for low-power indicator and backlight applications.
Features excellent current regulation accuracy and low dropout voltage for efficient operation.
Simple external component count makes it ideal for cost-sensitive applications.
Product Series
SLM
Primary Application
LED indicators
Key Features
- Low dropout voltage: 200mV at 150mA
- ±2% current regulation accuracy
- 2.5V to 5.5V input voltage range
- 150mA maximum output current
- Simple external resistor for current setting
- Thermal shutdown protection
Specifications
Applications
LED indicators
Electronic system design
LCD backlighting
Electronic system design
Keypad illumination
Electronic system design
Status lights
Electronic system design
Toys and gadgets
Electronic system design
FAE Expert Insights
"The SLM4140 is the simplest solution for driving LEDs from low-voltage supplies. I've used this part in countless indicator LED applications where the ±2% accuracy ensures consistent brightness. The low dropout voltage (200mV) means it can drive LEDs from 3.3V supply with minimal power loss. The SOT-23-5 package is tiny and perfect for space-constrained designs. One project used 20 SLM4140s for keypad backlighting in a handheld device. The simple resistor-set current eliminates need for external inductors or complex feedback networks. For low-current applications (<50mA), this linear driver is often more cost-effective than switching solutions."
Simple linear driver for low-power LED applications
— 王小红, BeiLuo