SC5310
Low-resistance load switch with programmable current limit and comprehensive protection features
Product Overview
Description
The SC5310 is a low-resistance load switch designed for power distribution and protection in portable devices. It features programmable current limiting and comprehensive protection features.
The device provides ultra-low on-resistance (<20mΩ) minimizing voltage drop and power loss. The programmable current limit allows protection of sensitive downstream circuits and power sources.
Fast transient response and soft-start capability make the SC5310 ideal for switching power to sensitive loads such as sensors, RF circuits, and memory devices.
Product Series
SC
Primary Application
Power distribution
Key Features
- Ultra-low on-resistance (<20mΩ)
- Programmable current limit
- Soft-start control
- Reverse current blocking
- Thermal shutdown
- WLCSP-6 package
- Fast transient response
Specifications
| Input Voltage | 2.5V to 5.5V |
|---|---|
| System Current | Up to 3A |
| On-Resistance | <20mΩ |
| Current Limit | Programmable 0.5A-3A |
| Package | WLCSP-6 |
Applications
Power distribution
Electronic system design
Sensor power switching
Sensor signal conditioning
RF circuit protection
Electronic system design
Memory power control
Industrial automation and control
USB power switching
Electronic system design
FAE Expert Insights
"The SC5310 is a versatile load switch that I use frequently for power distribution in complex systems. The <20mΩ on-resistance is excellent - you get minimal voltage drop even at 3A. The programmable current limit is the key feature - you can set it to protect sensitive power sources or downstream circuits. I've used this part to switch power to RF modules, sensors, and memory devices. The soft-start feature prevents inrush current issues when switching capacitive loads. The tiny WLCSP-6 package fits almost anywhere. Key design tips: use adequate input and output capacitance, set the current limit appropriately for your application, and ensure good thermal connection for high-current operation. This is a simple but effective solution for power switching and protection."
Low-resistance load switch with programmable current limiting
— Sarah Liu, BeiLuo
Frequently Asked Questions
How do I program the current limit?
Current limit programming for SC5310: (1) External resistor - Connect resistor from ILIM pin to ground. (2) Formula - Current limit is inversely proportional to resistor value. (3) Range - Programmable from 0.5A to 3A. (4) Accuracy - ±10% typical current limit accuracy. (5) Setting - Calculate resistor based on desired limit, verify with testing. (6) Protection - Device limits current and may shut down if limit exceeded. Contact LiTong for specific resistor values.
Contact LiTong for current limit programming guidance.
What is the advantage of low on-resistance?
Low on-resistance benefits: (1) Voltage drop - V = I x R. At 3A with 20mΩ: only 60mV drop. (2) Power loss - P = I² x R. At 3A: only 180mW dissipation. (3) Efficiency - Minimal power wasted in the switch. (4) Battery life - Less power loss extends battery runtime. (5) Thermal - Less heat generation reduces cooling requirements. The <20mΩ on-resistance makes this suitable for high-current applications with minimal impact on system efficiency.
Contact LiTong for load switch selection guidance.
FAQ 3 for SC5310?
This is additional FAQ information for SC5310. Contact LiTong for detailed technical support and application guidance.
Contact LiTong for technical support.
FAQ 4 for SC5310?
This is additional FAQ information for SC5310. Contact LiTong for detailed technical support and application guidance.
Contact LiTong for technical support.
FAQ 5 for SC5310?
This is additional FAQ information for SC5310. Contact LiTong for detailed technical support and application guidance.
Contact LiTong for technical support.