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SPX1117M3-1.8 from SPX

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SPX1117M3-1.8

Manufacturer: SPX, SIPEX

800mA Low Dropout Voltage Regulator

Partnumber Manufacturer Quantity Availability
SPX1117M3-1.8,SPX1117M318 SPX, SIPEX 106472 In Stock

Description and Introduction

800mA Low Dropout Voltage Regulator The SPX1117M3-1.8 is a low dropout (LDO) voltage regulator manufactured by SIPEX (later acquired by Exar Corporation).  

### **Specifications:**  
- **Output Voltage:** 1.8V (fixed)  
- **Output Current:** Up to 800mA  
- **Dropout Voltage:** Typically 1.1V at full load  
- **Input Voltage Range:** Up to 15V  
- **Line Regulation:** 0.2% (typical)  
- **Load Regulation:** 0.4% (typical)  
- **Package:** SOT-223 (3-pin)  
- **Operating Temperature Range:** -40°C to +125°C  
- **Quiescent Current:** ~10mA (typical)  
- **Protection Features:** Thermal shutdown, current limit  

### **Descriptions & Features:**  
- Designed for stable voltage regulation in low-power applications.  
- Suitable for battery-powered devices, embedded systems, and portable electronics.  
- Requires minimal external components (only input/output capacitors for stability).  
- Low dropout voltage improves efficiency in low-input voltage conditions.  
- Thermal shutdown prevents damage from overheating.  
- Current limiting protects against short circuits.  

This regulator is commonly used in applications requiring a stable 1.8V supply, such as microcontrollers, FPGAs, and communication modules.  

(Note: SIPEX was acquired by Exar, which was later acquired by MaxLinear. Always verify datasheets for the latest specifications.)

Application Scenarios & Design Considerations

800mA Low Dropout Voltage Regulator

Alternative Part Number

  • LM1117MPX-1.8 --: Pin-compatible 800mA low-dropout regulator with fixed 1.8V output in SOT-223, widely available and a common drop-in replacement for the SPX1117 series.
  • AMS1117-1.8 --: Very common 1A LDO regulator with fixed 1.8V output in SOT-223, functionally equivalent and low cost, though slightly higher dropout than the original.
  • LD1117S18TR --: 800mA fixed 1.8V LDO in SOT-223 with similar electrical characteristics and pinout, suitable as an alternative when the SPX1117 is unavailable.
  • LM1117IMP-1.8 --: Industry-standard 1.8V LDO regulator in SOT-223 with matching pinout and electrical characteristics, backed by a major manufacturer.

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