LT1573
LT1573
NOT RECOMMENDED FOR NEW DESIGNSLow Dropout Regulator Driver
- Part Models
- 8
- 1ku List Price
- Starting From $3.13
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Overview
- Low Cost Solution for High Current, Low Dropout Regulators
- Fast Transient Response Needs Much Less Bulk Capacitance
- Latching Overload Protection Minimizes Heat Sink Size
- Precision Output Voltage (1%)
- Single Supply Operation: VIN = 2.8V to 10V
- Small Surface Mount Package
- Capable of Very Low Dropout Voltage (<0.2V)
- Fixed or Adjustable Outputs
- Shutdown
The LT1573 is a regulator driver IC designed to provide a low cost solution for applications requiring high current, low dropout and fast transient response. When combined with an external PNP power transistor, this device provides load current up to 5A with dropout voltages as low as 0.35V. The LT1573 circuitry is designed for extremely fast transient response. This greatly reduces bulk storage capacitance when the regulator is used in applications with fast, high current load transients.
To keep cost and complexity low, the LT1573 uses a new time-delayed latching overcurrent protection technique that requires no external current sense resistor. Base drive is limited for instantaneous protection, and a time-delayed latch protects the regulator from continuous short circuits.
The LT1573 is available as an adjustable regulator with an output range of 1.27V to 6.8V and with fixed output voltages of 2.5V, 2.8V and 3.3V. Output accuracy is better than 1% to meet the critical regulation requirement of fast microprocessors. A special 8-pin, fused-lead surface mount package is used to minimize regulator footprint and provide adequate heat sinking.
Applications
- 3.3V to 2.5V Regulator
- Microprocessor Power Source
- Post Regulator for Switching Supplies
- High Efficiency Linear Regulators
- Ultralow Dropout Regulators
- Low Voltage Linear Regulators
Documentation
Data Sheet 1
Design Note 1
Brochure 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 |
|---|---|---|---|
| LT1573CS8#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1573CS8#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1573CS8-2.5#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1573CS8-2.5#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1573CS8-2.8#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1573CS8-3.3#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1573IS8#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1573IS8#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 8, 2024 - 24_0236 Migrating Bottom Trace Code Marking to Top Side Laser Marking for SOIC_N Package |
||
| LT1573CS8#PBF | PRODUCTION | |
| LT1573CS8#TRPBF | PRODUCTION | |
| LT1573CS8-2.5#PBF | PRODUCTION | |
| LT1573CS8-2.5#TRPBF | PRODUCTION | |
| LT1573CS8-2.8#PBF | PRODUCTION | |
| LT1573CS8-3.3#PBF | PRODUCTION | |
| LT1573IS8#PBF | PRODUCTION | |
| LT1573IS8#TRPBF | PRODUCTION | |
|
Oct 12, 2022 - 22_0254 Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 1 of 2) |
||
| LT1573CS8#PBF | PRODUCTION | |
| LT1573CS8#TRPBF | PRODUCTION | |
| LT1573CS8-2.5#PBF | PRODUCTION | |
| LT1573CS8-2.5#TRPBF | PRODUCTION | |
| LT1573CS8-2.8#PBF | PRODUCTION | |
| LT1573CS8-3.3#PBF | PRODUCTION | |
| LT1573IS8#PBF | PRODUCTION | |
| LT1573IS8#TRPBF | PRODUCTION | |
|
Jun 11, 2021 - 21_0060 Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM |
||
| LT1573CS8#PBF | PRODUCTION | |
| LT1573CS8#TRPBF | PRODUCTION | |
| LT1573CS8-2.5#PBF | PRODUCTION | |
| LT1573CS8-2.5#TRPBF | PRODUCTION | |
| LT1573CS8-2.8#PBF | PRODUCTION | |
| LT1573CS8-3.3#PBF | PRODUCTION | |
| LT1573IS8#PBF | PRODUCTION | |
| LT1573IS8#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| LT3150 | RECOMMENDED FOR NEW DESIGNS | Fast Transient Response, Low Input Voltage, Very Low Dropout Linear Regulator Controller |
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LT1573
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.