Overview
The LM2585SX-ADJ is a versatile and highly efficient switching regulator IC produced by Texas Instruments. This device is part of the SIMPLE SWITCHER® family and is designed for flyback, step-up (boost), and forward converter applications. The LM2585SX-ADJ features a 3A NPN power switch that can withstand up to 65V, making it suitable for a wide range of power supply designs. It requires a minimal number of external components, which enhances its cost-effectiveness and simplicity in use.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Input Voltage Range | Minimum to Maximum Input Voltage | 4 V to 40 V |
| Output Voltage | Adjustable Output Voltage | 1.23 V to 60 V |
| Switching Current | Maximum Switching Current | 3 A |
| Switching Frequency | Fixed Switching Frequency | 100 kHz |
| Operating Temperature | Junction Temperature Range | -40°C to 125°C |
| Package | Available Packages | TO-263-6, D²PAK (5 leads + tab), TO-263BA |
| Lead Free Status / RoHS Status | Compliance Status | Contains Lead / RoHS Compliant |
Key Features
- Requires few external components, making it cost-effective and simple to use.
- Family of standard inductors and transformers available for design.
- NPN output switch capable of 3 A and can stand off 65 V.
- Wide input voltage range: 4 V to 40 V.
- Current-mode operation for improved transient response, line regulation, and current limit.
- 100 kHz fixed-frequency internal oscillator.
- Internal soft-start function reduces in-rush current during start-up.
- Output transistor protected by current limit, undervoltage lockout, and thermal shutdown.
- System output voltage tolerance of ±4% over line and load conditions.
- Support for creating custom designs using the WEBENCH® Power Designer tool.
Applications
- Flyback regulators.
- Multiple-output regulators.
- Simple boost regulators.
- Forward converters.
Q & A
- What is the input voltage range of the LM2585SX-ADJ?
The input voltage range is from 4 V to 40 V.
- What is the maximum switching current of the LM2585SX-ADJ?
The maximum switching current is 3 A.
- What is the switching frequency of the LM2585SX-ADJ?
The switching frequency is fixed at 100 kHz.
- What are the available packages for the LM2585SX-ADJ?
The available packages include TO-263-6, D²PAK (5 leads + tab), and TO-263BA.
- Is the LM2585SX-ADJ RoHS compliant?
Yes, the LM2585SX-ADJ is RoHS compliant, although it contains lead.
- What protection features does the LM2585SX-ADJ have?
The device includes current limit, undervoltage lockout, and thermal shutdown protection.
- How does the LM2585SX-ADJ reduce in-rush current during start-up?
The device features an internal soft-start function to reduce in-rush current during start-up.
- What is the output voltage tolerance of the LM2585SX-ADJ?
The system output voltage tolerance is ±4% over specified line and load conditions.
- Can the LM2585SX-ADJ be used for multiple-output regulators?
Yes, the LM2585SX-ADJ can be used for multiple-output regulators.
- What tool can be used to create custom designs with the LM2585SX-ADJ?
The WEBENCH® Power Designer tool can be used to create custom designs.
