LT1962EMS8: High-Performance Low-Noise Linear Voltage Regulator | 300mA Output
LT1962EMS8: High-Performance Low-Noise Linear Voltage Regulator by Linear Technology
The LT1962EMS8 is a premium-grade low-dropout (LDO) linear voltage regulator manufactured by Linear Technology (now part of Analog Devices). Designed for applications demanding ultra-low noise and high stability, this IC delivers up to 300mA output current with exceptional power supply rejection. Below we explore its technical specifications, design advantages, and ideal use cases to help engineers optimize their power management solutions.
Detailed Product Overview
As part of the PMIC - Voltage Regulators - Linear category, the active LT1962EMS8 features a MICRO package (MSOP-8) for space-constrained designs. Its advanced architecture combines high efficiency with precision voltage regulation, making it a top choice for:
- RF/analog circuitry in 5G and IoT devices
- Portable medical equipment
- Industrial sensor networks
- Automotive infotainment systems
Key Technical Specifications
Electrical Characteristics
| Parameter | Value |
|---|---|
| Output Current | 300mA (max) |
| Input Voltage Range | 2.7V to 20V (typical) |
| Output Voltage Options | Fixed (1.2V-15V) or Adjustable |
| Dropout Voltage | 280mV @ 300mA (typ) |
| Output Noise | 30 VRMS (10Hz-100kHz) |
| PSRR | 75dB @ 1kHz |
| Quiescent Current | 40 A (typ) |
| Operating Temp | -40 C to +125 C |
Advanced Features
1. Ultra-Low Noise Operation
The regulator incorporates proprietary silicon layout techniques to achieve 30 VRMS output noise, critical for:
- Phase-locked loops (PLLs)
- High-resolution ADCs/DACs
- Wireless transceivers
2. Power Supply Rejection
With 75dB PSRR at 1kHz, the LT1962EMS8 effectively filters input ripple from switching power supplies, eliminating the need for additional filtering stages.
3. Thermal Protection
Built-in thermal shutdown (160 C threshold) and current limiting protect the device during fault conditions.
Design Advantages
Board-Level Optimization
The MSOP-8 package enables:
- Compact PCB footprints (3mm x 3mm)
- Improved thermal performance via exposed pad
- Simplified layout with <1cm total solution size
Application-Specific Benefits
For Battery-Powered Devices
- 40 A quiescent current extends battery life
- Low dropout maintains regulation during brownouts
For Precision Instrumentation
- 0.05%/V line regulation
- 0.1% load regulation (0mA to 300mA)
Comparative Analysis
When benchmarked against competitors like the ADP150 and TPS7A47, the LT1962EMS8 offers:
| Feature | LT1962EMS8 | ADP150 | TPS7A47 |
|---|---|---|---|
| Noise ( VRMS) | 30 | 9 | 4.17 |
| PSRR (dB) | 75 | 70 | 78 |
| Cost | $$ | $$$ | $$$$ |
Implementation Guidelines
Critical Layout Considerations
- Place input capacitor (1 F ceramic) within 5mm of VIN
- Use star grounding for noise-sensitive applications
- Thermal vias required for high ambient temperatures
Typical Application Circuit
Frequently Asked Questions
Q: Can the LT1962EMS8 parallel for higher current?
A: Not recommended due to current sharing challenges. Consider the LT1963 (1.5A version) instead.
Q: Minimum input voltage for 3.3V output?
A: 3.58V (3.3V + 280mV dropout).
Purchasing Information
Available through authorized distributors including:
- Digi-Key: Stock # LT1962EMS8#PBF-ND
- Mouser: Part # 584-LT1962EMS8#PBF
For volume pricing (>1k units), contact Analog Devices field applications engineers for customized support.
Conclusion
The LT1962EMS8 represents an optimal balance between performance and cost for designers needing:
- Military-grade reliability (-40 C to +125 C)
- Minimal board space requirements
- Exceptional noise performance
Download the complete LT1962EMS8 datasheet for detailed characterization graphs and reliability data.