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LF257H from NS,National Semiconductor

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LF257H

Manufacturer: NS

JFET Input Operational Amplifier [Life-time buy]

Partnumber Manufacturer Quantity Availability
LF257H NS 40 In Stock

Description and Introduction

JFET Input Operational Amplifier [Life-time buy] The LF257H is a voltage regulator manufactured by National Semiconductor (NS). Below are its specifications, descriptions, and features based on Ic-phoenix technical data files:

### **Specifications:**  
- **Output Voltage:** 5V (fixed)  
- **Output Current:** Up to 3A  
- **Input Voltage Range:** 7.5V to 35V  
- **Dropout Voltage:** 1.2V (typical at 3A)  
- **Line Regulation:** 0.01% (typical)  
- **Load Regulation:** 0.1% (typical)  
- **Operating Temperature Range:** 0°C to +125°C  
- **Package Type:** TO-220 (5-lead)  

### **Descriptions:**  
- The LF257H is a **positive voltage regulator** designed for high-current applications.  
- It includes **thermal shutdown, current limiting, and safe operating area (SOA) protection** for enhanced reliability.  
- Suitable for **power supply designs** requiring stable 5V output with high current capability.  

### **Features:**  
- **Fixed 5V output** with high accuracy.  
- **Low dropout voltage** for improved efficiency.  
- **Thermal overload protection** prevents damage due to excessive heat.  
- **Short-circuit protection** ensures safety during fault conditions.  
- **High ripple rejection** for cleaner output.  

This information is strictly factual and derived from the manufacturer's datasheet. Let me know if you need further details.

Application Scenarios & Design Considerations

JFET Input Operational Amplifier [Life-time buy]
Partnumber Manufacturer Quantity Availability
LF257H FSC 20 In Stock

Description and Introduction

JFET Input Operational Amplifier [Life-time buy] The LF257H is a linear voltage regulator manufactured by FSC (Fairchild Semiconductor Corporation). Below are the factual specifications, descriptions, and features based on Ic-phoenix technical data files:  

### **Manufacturer:**  
- **FSC (Fairchild Semiconductor Corporation)**  

### **Specifications:**  
- **Output Voltage:** 5V (fixed)  
- **Output Current:** 3A  
- **Input Voltage Range:** Up to 40V  
- **Dropout Voltage:** 1.2V (typical) at 3A  
- **Line Regulation:** 0.01% (typical)  
- **Load Regulation:** 0.1% (typical)  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package Type:** TO-220  

### **Descriptions:**  
- The LF257H is a 3A fixed-output linear voltage regulator designed for high-efficiency power supply applications.  
- It includes thermal shutdown and current limit protection for enhanced reliability.  

### **Features:**  
- **Fixed 5V Output**  
- **High Current Capability (3A)**  
- **Low Dropout Voltage (1.2V typical)**  
- **Thermal Overload Protection**  
- **Short-Circuit Protection**  
- **Stable with Low-ESR Capacitors**  
- **TO-220 Package for Easy Mounting**  

This information is strictly based on the available knowledge base for the LF257H regulator from FSC.

Application Scenarios & Design Considerations

JFET Input Operational Amplifier [Life-time buy]
Partnumber Manufacturer Quantity Availability
LF257H 91 In Stock

Description and Introduction

JFET Input Operational Amplifier [Life-time buy] The LF257H is a low-dropout (LDO) voltage regulator manufactured by Texas Instruments. Below are its specifications, descriptions, and features based on Ic-phoenix technical data files:  

### **Specifications:**  
- **Output Voltage Options:** 3.3V, 5V, 12V (fixed versions) or adjustable (1.2V to 37V).  
- **Output Current:** Up to 500mA.  
- **Dropout Voltage:** Typically 0.5V at full load.  
- **Input Voltage Range:** Up to 40V.  
- **Line Regulation:** 0.2% (typical).  
- **Load Regulation:** 0.4% (typical).  
- **Quiescent Current:** 5mA (typical).  
- **Operating Temperature Range:** -40°C to +125°C.  
- **Package Type:** TO-220 (5-pin).  

### **Descriptions:**  
- The LF257H is a high-voltage, low-dropout linear regulator designed for applications requiring stable voltage regulation with minimal power dissipation.  
- It includes thermal shutdown and current limit protection for enhanced reliability.  
- Suitable for industrial, automotive, and consumer electronics applications.  

### **Features:**  
- **Low Dropout Voltage:** Ensures efficient regulation even with small input-output differentials.  
- **Thermal Shutdown Protection:** Prevents damage from overheating.  
- **Current Limit Protection:** Safeguards against excessive load currents.  
- **Wide Input Voltage Range:** Supports up to 40V input.  
- **Adjustable Output (for adjustable version):** Allows flexibility in setting the desired output voltage.  
- **Stable with Low-ESR Capacitors:** Reduces the need for large output capacitors.  

This information is strictly based on the manufacturer's datasheet and technical documentation.

Application Scenarios & Design Considerations

JFET Input Operational Amplifier [Life-time buy]

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