LT4423
RECOMMENDED FOR NEW DESIGNS28V, 2A Ideal Diode and Load Switch
- Part Models
- 1
- 1ku List Price
- Starting From $2.52
Overview
- Internal 200mΩ Power Path
- Wide Operating Voltage Range: 1.9V to 28V
- Reverse Current Protection
- Load Switch Capability
- Low 10μA Quiescent Current
- Fast 3μs Response to Load Steps
- Low 500nA Off State Current
- Smooth Switchover in Diode-OR Applications
- Integrated Thermal Protection
- 10-Lead (3mm x 2mm x 0.75mm) LDFN Package
The LT®4423 is a 1.9V to 28V ideal diode and load switch with integrated P-channel MOSFETs. When enabled, 15mV forward voltage regulation minimizes power dissipation while increasing operating headroom and efficiency compared to a Schottky diode.
Using two LT4423s in diode-OR applications provide a seamless transfer to the highest available voltage under varying input supply conditions. A non-enabled LT4423 blocks up to 28V in either direction or polarity while exhibiting less than 1μA (typical) leakage current, providing orders of magnitude improvement over typical Schottky diodes, which leads to extended battery life.
Fast OUT to IN reverse bias detection minimizes reverse current, preventing undesired charging of input batteries. The open-drain STATUS output pulls low when the LT4423 is in shutdown, reverse bias, or under thermal protection. Integrated thermal detection protects from overtemperature conditions by disabling the power path.
APPLICATIONS
- Schottky Diode Replacement
- Battery and Wall Adapter Diode ORing
- Backup Battery Diode ORing
- Industrial and Consumer Hand-Held Applications
Documentation
Data Sheet 1
Evaluation Design File 1
Analog Dialogue 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LT4423AV#TRPBF | LGA |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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LTspice
Models for the following parts are available in LTspice:
- LT4423
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Evaluation Kits
28V, 2A Ideal Diode & Switch Load
Resources
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