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LM2770SD-1215 from TI,Texas Instruments

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LM2770SD-1215

Manufacturer: TI, NS

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

Partnumber Manufacturer Quantity Availability
LM2770SD-1215,LM2770SD1215 TI, NS 29136 In Stock

Description and Introduction

High Efficiency Switched Capacitor Step-Down DC/DC Regulator with Sleep Mode The LM2770SD-1215 is a switched capacitor voltage inverter manufactured by Texas Instruments (TI). Here are its specifications, descriptions, and features:

### **Specifications:**
- **Input Voltage Range:** 2.7V to 5.5V  
- **Output Voltage:** -1.5V (fixed)  
- **Output Current:** Up to 100mA  
- **Switching Frequency:** 1.5MHz (typical)  
- **Efficiency:** Up to 90%  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 8-pin WSON (SD)  

### **Descriptions:**
The LM2770SD-1215 is a negative voltage inverter that generates a regulated -1.5V output from a positive input voltage (2.7V to 5.5V). It uses a switched capacitor architecture, eliminating the need for an inductor, making it suitable for space-constrained applications.  

### **Features:**
- **No Inductor Required:** Uses only flying capacitors for voltage inversion.  
- **Low Output Ripple:** Minimizes noise in sensitive applications.  
- **Low Quiescent Current:** 0.6mA (typical) for power efficiency.  
- **Thermal Shutdown Protection:** Prevents damage from overheating.  
- **Small Footprint:** 8-pin WSON package (2mm x 2mm).  

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

Application Scenarios & Design Considerations

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

Alternative Part Number

  • TPS62090RGTR --: High-efficiency step-down converter in a similar small package, suitable for low-voltage rail replacement with good availability.
  • MAX17502EATB+T --: Compact synchronous buck regulator with comparable input/output range, offering a cross-vendor alternative.
  • AP3211KTR-G1 --: Low-cost 1.5A step-down converter in SOT-23-6, a practical drop-in style option for similar power rails.
  • TPS60500DGSR --: Charge-pump regulated buck converter with similar low-current output capability; TI is the direct successor to National Semiconductor, so pinout and function are closely aligned.
  • MAX1682EUK+T --: Switched-capacitor voltage converter in a small SOT-23 package, suitable as a functional substitute for low-current charge-pump regulation applications.
  • LTC1515CS8-3.3 --: Regulated charge-pump converter with selectable output, offering comparable low-noise step-down/step-up regulation in a compact package.

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