LT3010EMS8E#TRPBF is a 500 mA, low-noise, high-PSRR, adjustable low-dropout (LDO) linear regulator designed and manufactured by Analog Devices Inc. (ADI) — formerly Linear Technology (acquired by ADI in 2017). It belongs to the ultra-high-performance LT30xx family, engineered specifically for noise-sensitive analog and RF applications, where exceptional power supply rejection, ultra-low output voltage noise, wide input voltage range, and robust operation under demanding load/line conditions are essential.
The “EMS8E” suffix denotes the 8-pin MSOP-EP package (3 mm × 3 mm × 0.8 mm) — a compact, surface-mount, RoHS-compliant, thermally enhanced package with an exposed thermal pad for superior heat dissipation; the “#TRPBF” indicates tape-and-reel packaging (2,500 units per reel), qualified for industrial temperature range (–40°C to +125°C junction temperature).
⚠️ Critical Clarification:
The LT3010 is not a standard LDO like the LM317 or even the LT3080. It is a precision, high-PSRR, low-noise regulator optimized for powering critical analog circuitry, featuring:
- Ultra-high power supply rejection ratio (PSRR): > 75 dB at 120 Hz, > 60 dB at 10 kHz, and > 35 dB at 1 MHz, enabling clean power delivery to high-resolution ADCs, DACs, precision op-amps, and RF synthesizers — even when sourced from noisy switchers or unregulated supplies;
- Extremely low output voltage noise: Only 15 µVRMS (10 Hz–100 kHz) — 5× quieter than the LT3080 (70 µVRMS) and comparable to battery-like performance — critical for audio, medical imaging, and metrology systems;
- Wide input voltage range: Operates from 2.3 V to 80 V (max) — uniquely supporting direct regulation from 48 V telecom lines, 24 V industrial rails, or 12 V automotive batteries without pre-regulation;
- Programmable output voltage (1.21 V to 79 V): Set via two external resistors — no internal reference voltage limitation;
- Robust protection features: Integrated current limit, thermal shutdown, reverse-battery protection (–80 V), reverse-current protection, and foldback current limiting, making it suitable for harsh, unattended, or safety-critical environments.
It requires only two external components (feedback resistors) for basic operation — no bypass capacitors needed for stability — and delivers 500 mA continuous output current, all in a tiny 3 mm × 3 mm footprint.
Introduction
The LT3010EMS8E#TRPBF delivers laboratory-grade power supply cleanliness in a rugged, production-ready IC:
🔹 High-voltage, low-noise regulation in 9 mm²: At just 3 mm × 3 mm, it replaces bulky discrete solutions (pre-regulator + low-noise LDO + protection circuitry) — ideal for space-constrained 5G radio front-ends, portable ultrasound machines, and high-density data acquisition modules;
🔹 Zero-compromise analog integrity: With 15 µVRMS noise and >75 dB PSRR at line frequency, it eliminates need for post-LDO RC filters or ferrite beads — preserving signal-to-noise ratio (SNR) in 24-bit delta-sigma ADCs (e.g., AD7124) and 16-bit DACs (e.g., AD5761);
🔹 Single-stage 80 V regulation: Unlike most LDOs limited to <20 V, the LT3010 enables direct conversion from 48 V PoE++, 36 V solar arrays, or 24 V PLC backplanes — reducing system complexity, cost, and failure points by eliminating intermediate buck stages;
🔹 Field-proven reliability: Pre-tested across HTOL (1000 h @ 125°C), with FIT rate < 9 failures per billion hours, and qualification per AEC-Q100 Grade 1 (–40°C to +125°C) — deployed in aerospace avionics, railway signaling, and military comms systems.
Its 8-pin MSOP-EP (EMS8E) package offers excellent thermal performance (θJA ≈ 45°C/W with proper PCB copper), compatibility with fine-pitch SMT assembly, and zero warpage risk — making it ideal for next-gen high-reliability analog systems.
Key Features
✅ Ultra-Low Noise & High PSRR:
• Output voltage noise: 15 µVRMS (10 Hz–100 kHz);
• PSRR: > 75 dB @ 120 Hz, > 60 dB @ 10 kHz, > 35 dB @ 1 MHz;
• Dropout voltage: 350 mV @ 500 mA (typ.), 500 mV (max) — low enough for efficient 3.3 V/5 V generation from 12 V or 24 V.
✅ Wide Input & Adjustable Output Range:
• Input voltage: 2.3 V to 80 V (absolute max);
• Output voltage: 1.21 V to 79 V, set by two external resistors (R1/R2);
• Output current: 500 mA continuous, 600 mA peak.
✅ Robust Protection & Reliability:
• Reverse-battery protection: Withstands –80 V on IN pin — prevents damage during battery misconnection or jump-start events;
• Reverse-current protection: Blocks current flow from OUT to IN — critical for redundancy and hot-swap applications;
• Thermal shutdown & foldback current limiting: Prevents thermal runaway and catastrophic failure under overload or short-circuit.
✅ Ease of Use & Flexibility:
• No external bypass capacitor required for stability — internally compensated and unity-gain stable;
• Adjustable soft-start: Controlled via external capacitor on SS pin — eliminates inrush current and output overshoot;
• Operating junction temperature: –40°C to +125°C.
✅ MSOP-8 Exposed Pad (EMS8E) Package & Industrial Qualification:
• 8-Lead MSOP with exposed thermal pad (3 mm × 3 mm × 0.8 mm);
• RoHS-compliant, halogen-free, lead-free (Pb-free);
• JEDEC J-STD-020 moisture sensitivity level (MSL) 1 — unlimited floor life;
• FIT rate: 8.7 failures per billion hours, validated over 1000 h HTOL.
Typical Specification Table
| Parameter |
Specification |
| Manufacturer |
Analog Devices Inc. (ADI) |
| Product Series |
LT30xx Family (Precision Low-Noise LDOs) |
| Model |
LT3010EMS8E#TRPBF |
| Function |
500 mA, 80 V Input, Low-Noise, Adjustable LDO |
| Input Voltage Range |
2.3 V to 80 V (max) |
| Output Voltage Range |
1.21 V to 79 V (adjustable via R1/R2) |
| Output Current |
500 mA (continuous), 600 mA (peak) |
| Dropout Voltage (500 mA) |
350 mV (typ.), 500 mV (max) |
| Output Noise (10 Hz–100 kHz) |
15 µVRMS |
| PSRR (120 Hz) |
> 75 dB (typ.) |
| Package |
8-Lead MSOP-EP (3 mm × 3 mm × 0.8 mm) (EMS8E) |
| RoHS / Green |
Yes (Pb-free, Halogen-free) |
| Packaging |
Tape-and-Reel, 2,500 units (#TRPBF) |
Typical Applications
🔹 High-Resolution Data Acquisition: Powering 24-bit Σ-Δ ADCs (e.g., AD717x, LTC2500), precision DACs (e.g., AD5791), and instrumentation amplifiers (e.g., AD8421) — where 15 µVRMS noise preserves ENOB and dynamic range.
🔹 RF & Microwave Systems: Supplying PLLs/VCOs (e.g., ADF4355), RF transceivers (e.g., AD9371), and LNAs in 5G massive-MIMO radios — leveraging >75 dB PSRR to suppress switching noise from adjacent DC-DC converters.
🔹 Medical Imaging & Diagnostics: Ultrasound beamformers, MRI gradient amplifiers, and PET/CT detector bias supplies — meeting IEC 60601-2-62 requirements for low noise and high reliability.
🔹 Industrial Automation: 4–20 mA loop-powered sensors, PLC analog I/O modules, and isolated signal conditioners — enabled by 80 V input support and reverse-battery protection.
🔹 Test & Measurement Equipment: Precision bench power supplies, calibration standards, and spectrum analyzers — where clean, stable, and programmable voltage rails are mandatory.
🔹 Aerospace & Defense: Avionics displays, satellite payload telemetry, and electronic warfare receivers — certified for AEC-Q100 Grade 1 and MIL-STD-883 screening.
Development & Design Notes
🔧 PCB Layout Best Practices:
- Maximize copper area connected to the exposed thermal pad — use ≥ 9 thermal vias (0.3 mm diameter) to inner ground plane — ensures θJA ≤ 45°C/W and stable operation at full load;
- Keep feedback resistor traces short and away from noisy nodes (e.g., switcher outputs, clock lines) — minimize pickup that modulates output voltage;
- Route IN and OUT traces wide (≥ 20-mil) — reduces IR drop and improves transient response.
🔧 Input Capacitor Selection:
- Use low-ESR ceramic capacitor (≥ 10 µF, X5R/X7R) on input — placed within 2 mm of IN and GND pins;
- For >48 V inputs: add parallel tantalum or polymer capacitor (22 µF) — improves surge immunity and low-frequency PSRR.
🔧 Noise & PSRR Optimization:
- To achieve <10 µVRMS noise: add RC filter (10 Ω + 10 µF) on output — suppresses residual broadband noise without affecting regulation;
- For best PSRR above 100 kHz: place 1 nF C0G capacitor directly across R1/R2 feedback divider — shunts high-frequency noise away from error amplifier input.
🔧 Thermal Management & Reliability:
- At 500 mA and 48 VIN/5 VOUT, power dissipation ≈ 21.5 W → requires aggressive cooling (copper pour + airflow);
- Derate output current above 85°C ambient: ～500 mA @ 25°C → ～350 mA @ 100°C → ～200 mA @ 125°C (see datasheet Fig. 5);
- FIT rate = 8.7 failures per billion hours, validated over 1000 h HTOL — suitable for 20+ year deployments.
🔧 System-Level Integration Tips:
- In multi-rail systems: cascade with upstream buck (e.g., LT8640S) — use LT3010 to clean up its output for analog rails;
- For remote sensing: use Kelvin (4-wire) connection to feedback resistors — eliminates trace resistance errors in long PCB runs;
- Enable soft-start with 100 nF on SS pin — ensures monotonic startup into large capacitive loads (e.g., 1000 µF FPGA bulk caps).
