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LM2770SDX-1215 from NSC,National Semiconductor

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LM2770SDX-1215

Manufacturer: NSC, NS

High Efficiency Switched Capacitor Step-Down DC/DC Regulator with Sleep Mode
Partnumber Manufacturer Quantity Availability
LM2770SDX-1215,LM2770SDX1215 NSC, NS 37855 In Stock

Description and Introduction

High Efficiency Switched Capacitor Step-Down DC/DC Regulator with Sleep Mode The LM2770SDX-1215 is a switched capacitor voltage inverter manufactured by National Semiconductor (NSC).  

### **Specifications:**  
- **Input Voltage Range:** 2.7V to 5.5V  
- **Output Voltage:** -1.5V (fixed)  
- **Output Current:** Up to 100mA  
- **Switching Frequency:** 1.6MHz (typical)  
- **Efficiency:** Up to 90%  
- **Package:** 6-pin WSON  
- **Operating Temperature Range:** -40°C to +85°C  

### **Descriptions and Features:**  
- **Inverting Charge Pump:** Converts a positive input voltage to a negative output voltage.  
- **Low Output Ripple:** Minimizes noise in sensitive applications.  
- **Low Quiescent Current:** 0.5mA (typical) for power efficiency.  
- **No Inductors Required:** Uses only external capacitors for operation.  
- **Fixed Output Voltage:** Eliminates the need for external feedback resistors.  
- **Thermal Shutdown Protection:** Prevents damage from excessive heat.  
- **Space-Saving Package:** Suitable for compact designs.  

This device is commonly used in applications requiring a small negative voltage rail, such as audio amplifiers, LCD bias supplies, and portable electronics.

Application Scenarios & Design Considerations

High Efficiency Switched Capacitor Step-Down DC/DC Regulator with Sleep Mode

Alternative Part Number

  • TPS60503DGSR --: Pin-compatible regulated charge-pump converter in the same class; TI acquired National Semiconductor, so this is a direct modern replacement with similar input range and output current.
  • MAX1682EUK+T --: Switched-capacitor voltage converter offering comparable charge-pump regulation and small SOT-23 package, suitable as a functional substitute.
  • LTC3251EMS8E#PBF --: Low-noise inductorless step-down charge pump with similar output capability and compact MSOP package, a viable alternative when the original is unavailable.
  • TPS62040DRCR --: Step-down DC-DC converter in a small SON package with comparable input voltage range and output current, suitable as a functional substitute for the LM2770 buck regulator.
  • RT8010GQW --: Compact synchronous buck converter offering similar voltage conversion and load capability, widely used as a drop-in style alternative in portable designs.
  • AP3418KTR-G1 --: Low-voltage step-down converter with comparable current rating and small footprint, providing a cost-effective replacement option.

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