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LM2687LDX from NS,National Semiconductor

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LM2687LDX

Manufacturer: NS, NSC

Low Noise Regulated Switched Capacitor Voltage Inverter

Partnumber Manufacturer Quantity Availability
LM2687LDX NS, NSC 38567 In Stock

Description and Introduction

Low Noise Regulated Switched Capacitor Voltage Inverter The LM2687LDX is a switched capacitor voltage converter manufactured by National Semiconductor (NSC). Below are its specifications, descriptions, and features:  

### **Specifications:**  
- **Input Voltage Range:** 2.5V to 5.5V  
- **Output Voltage Options:** Fixed +5V (±4%) or Adjustable (via external resistors)  
- **Output Current:** Up to 50mA  
- **Switching Frequency:** 150kHz (typical)  
- **Efficiency:** Up to 90%  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 8-pin SOIC  

### **Descriptions:**  
The LM2687LDX is a low-power, switched-capacitor voltage doubler that generates a regulated output from an input supply. It is designed for applications requiring a small, efficient, and low-noise power supply solution.  

### **Features:**  
- **Low Quiescent Current:** 120µA (typical)  
- **Soft-Start Function:** Reduces inrush current  
- **Low Output Ripple**  
- **No Inductors Required**  
- **Shutdown Mode:** Reduces current consumption to 1µA (typical)  
- **Short-Circuit Protection**  

This information is based on the manufacturer's datasheet. For detailed application notes, refer to the official NSC documentation.

Application Scenarios & Design Considerations

Low Noise Regulated Switched Capacitor Voltage Inverter

Alternative Part Number

  • TPS60503DGSR --: Pin-compatible regulated charge-pump voltage converter in the same low-power class; TI is the direct successor to National Semiconductor, so it is the safest drop-in option.
  • MAX1682EUK+T --: Switched-capacitor voltage converter with comparable input range and output current, available in a small SOT-23 package; a well-established alternative from a different series.
  • LTC1515CS8-3.3 --: Regulated charge-pump converter offering similar functionality and output capability; a robust fallback from a different manufacturer and naming series.
  • LTC1515CS8-3.3#PBF --: Regulated charge-pump converter providing a fixed 3.3V output with wide input range, usable as an alternative where the LM2687LDX function is needed.

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