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TPS79501DCQR from TI,Texas Instruments

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TPS79501DCQR

Manufacturer: TI

Ultra-Low Noise, High PSRR, Fast RF, High-Enable, 500-mA Low Dropout Regulator

Partnumber Manufacturer Quantity Availability
TPS79501DCQR TI 14473 In Stock

Description and Introduction

Ultra-Low Noise, High PSRR, Fast RF, High-Enable, 500-mA Low Dropout Regulator The TPS79501DCQR is a low-dropout (LDO) voltage regulator manufactured by Texas Instruments (TI). Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Output Voltage:** 5.0 V (fixed)  
- **Output Current:** 500 mA  
- **Dropout Voltage:** 110 mV (typical) at 500 mA  
- **Input Voltage Range:** 2.7 V to 5.5 V  
- **Line Regulation:** 0.02% (typical)  
- **Load Regulation:** 0.04% (typical)  
- **Quiescent Current:** 85 µA (typical)  
- **PSRR (Power Supply Rejection Ratio):** 75 dB at 1 kHz  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** SOT-223-5 (DCQ)  

### **Descriptions:**
- The TPS79501DCQR is a high-performance LDO regulator designed for applications requiring low noise, high PSRR, and low dropout voltage.  
- It features fast transient response and stable operation with low-ESR ceramic capacitors.  
- The device includes thermal shutdown and current limit protection.  

### **Features:**
- **High Accuracy:** ±1% output voltage accuracy over line, load, and temperature.  
- **Low Noise:** 30 µVRMS (typical) output noise.  
- **Enable Pin:** Allows for power sequencing and shutdown mode (quiescent current drops to <1 µA when disabled).  
- **Thermal Shutdown & Current Limit Protection:** Ensures safe operation under fault conditions.  
- **Stable with Ceramic Capacitors:** Requires only a 1 µF (minimum) output capacitor for stability.  

For further details, refer to the official TI datasheet.

Application Scenarios & Design Considerations

Ultra-Low Noise, High PSRR, Fast RF, High-Enable, 500-mA Low Dropout Regulator

Alternative Part Number

  • LP38691SD-ADJ --: Adjustable low-dropout linear regulator in a similar SOT-223 package with comparable current capability and low noise, suitable as a functional replacement.
  • ADP1706ARDZ-1.2 --: Low-noise, high-PSRR LDO regulator offering similar output current and dropout performance, a strong alternative from a different vendor.
  • MIC5219YM5-TR --: Adjustable low-dropout regulator with low noise and good PSRR in a small package, usable as a cross-vendor substitute for the TPS79501.
  • LP5907MFX-3.3/NOPB --: Low-noise LDO in SOT-23-5 with similar dropout and current capability; different series name makes it easy to distinguish from the source.
  • ADP151AUJZ-3.3-R7 --: Ultra-low-noise 200 mA LDO in TSOT-5, comparable electrical performance and pinout style, from a different vendor and series.
  • MIC5219-3.3YM5-TR --: 500 mA LDO in SOT-23-5 with similar dropout characteristics; different prefix and manufacturer provide a clear alternative.

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