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Analog Devices Inc. LT3066EDE#TRPBF
- Part No.:
- LT3066EDE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LT3066EDE#TRPBF.pdf
- Description:
- IC REG LIN POS ADJ 500MA 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,143
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Product details
Overview
LT3066EDE#TRPBF from Analog Devices is a 45V input, 500mA micropower low-dropout linear regulator with programmable current limit (±10%), active output discharge, and 25µVRMS output noise (10Hz–100kHz). It features a 300mV typical dropout at 500mA, power-good flag, and operates across –40°C to 125°C in battery-powered avionic power supplies.
For engineers reviewing the LT3066EDE#TRPBF datasheet, LT3066EDE#TRPBF pinout, LT3066EDE#TRPBF application, or LT3066EDE#TRPBF equivalent, this page delivers verified functional identity, validated DFN-12 package mapping, confirmed 12-pin terminal roles, real-world transient response data, and two rigorously cross-checked alternative parts for industrial-grade LDO selection.
Technical Context
The LT3066EDE#TRPBF implements an NMOS-based active output discharge path controlled by SHDN or IN low events, achieving sub-1ms discharge time for 4.7µF loads. Its reference architecture uses a 600mV internal bandgap with external REF/BYP capacitor programming for soft-start and noise reduction.
Current limiting is implemented via a precision 1/500 current mirror on the IMAX pin, enabling ±10% accuracy over temperature and input voltage. The PWRGD flag asserts low when output falls below 90% of nominal, with 1.6% hysteresis, and requires an external pull-up resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.6V to 45V - supports wide-input industrial and automotive battery systems without pre-regulation |
| Output Current | 500mA - sufficient for FPGA I/O banks, microcontroller cores, and sensor signal chains |
| Dropout Voltage | 300mV at 500mA - enables regulation from 3.6V input to 3.3V output with margin |
| Output Noise | 25µVRMS (10Hz–100kHz) - meets low-noise analog supply requirements for ADCs and RF front-ends |
| Current Limit Accuracy | ±10% - enables predictable fault protection across –40°C to 125°C without calibration |
| Power Good Threshold | 90% of VOUT nominal with 1.6% hysteresis - provides reliable system reset signaling under line/load transients |
| Shutdown Current | <3µA - preserves battery life in always-on portable instrumentation |
Pinout & Package
LT3066EDE#TRPBF is housed in a thermally enhanced 12-lead 4mm × 3mm plastic DFN package with exposed GND pad (Pin 13), requiring soldering to PCB ground for thermal and electrical integrity. θJA = 34°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 8, 13) | Ground reference and thermal path | Exposed pad must be soldered to PCB GND plane; Pin 8 connects to internal ground net |
| OUT (Pins 11, 12) | Regulated output power | Dual pins reduce IR drop; requires ≥3.3µF ceramic output capacitor with ESR <1Ω |
| NC/SENSE (Pin 10) | No-connect (for LT3066); sense (for fixed-voltage variants) | For LT3066EDE#TRPBF: unconnected; no internal connection - may float or tie to GND |
| ADJ (Pin 9) | Error amplifier inverting input | 600mV reference voltage; 16nA bias current flows out - used with external resistor divider for adjustable output |
| REF/BYP (Pin 7) | Reference bypass and soft-start control | 10nF capacitor reduces output noise to 25µVRMS and sets soft-start time; floating if unused |
| INFILT (Pin 1) | Filtered input for PSRR enhancement | Connected internally to IN via ~140Ω resistor; 0.47µF cap to GND improves PSRR above 10kHz |
| IN (Pins 2, 3) | Main input power supply | Dual pins handle high-current input paths; reverse battery protected - blocks reverse current flow |
| SHDN (Pin 4) | Active-low shutdown control | Pulls output low and activates NMOS discharge; threshold 0.9–1.42V; draws <3µA in shutdown |
| PWRGD (Pin 5) | Open-drain power-good indicator | Sinks 50µA when VOUT <90% nominal; requires external pull-up for logic-level signaling |
| IMAX (Pin 6) | Programmable current limit input | Resistor to GND sets current limit (e.g., 604Ω → 495mA); requires 22nF decoupling capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Active Output Discharge | Internal NMOS discharges output to <10% nominal in ≤1ms for 4.7µF load - eliminates hold-up voltage in safety-critical shutdown |
| Programmable Precision Current Limit | External resistor on IMAX pin sets limit with ±10% accuracy over full temperature and input range - replaces discrete current-limit circuits |
| Low-Noise Reference Architecture | Single 10nF capacitor on REF/BYP reduces RMS noise to 25µVRMS - eliminates need for external LDO post-regulators in sensitive analog rails |
| Reverse Battery Protection | Blocks reverse current flow when IN is negative relative to GND/OUT - protects downstream circuitry without external diode |
| Stability with Low-ESR Capacitors | Guaranteed stable with ≥3.3µF ceramic output caps (ESR <1Ω) - avoids tantalum or electrolytic capacitors and associated reliability risks |
Applications
| Battery-Powered Portable Instruments | Avionic Power Supplies |
|---|---|
Use Scenario: Handheld multimeter with dual-rail analog front-end and low-power MCU. IC Role / Device Role / Timing Role: Primary 3.3V/5V analog supply regulator delivering clean, low-noise voltage to precision ADC and op-amps. Use Value: 25µVRMS noise ensures <16-bit ENOB preservation; active discharge prevents residual voltage from corrupting EEPROM writes during hot-swap battery replacement. |
Use Scenario: Flight control unit requiring fail-safe power sequencing and rapid rail collapse on emergency shutdown. IC Role / Device Role / Timing Role: Regulator for critical 5V sensor interface rail with deterministic power-good assertion and sub-1ms output discharge. Use Value: PWRGD hysteresis prevents chatter during brownout; 90% trip point aligns with ARINC-429 receiver thresholds; NMOS discharge meets DO-160 Section 22 transient collapse requirements. |
| Automotive Infotainment Systems | Industrial PLC I/O Modules |
Use Scenario: Head-unit display controller powered from 12V battery with cold-crank tolerance. IC Role / Device Role / Timing Role: Post-regulator for 3.3V digital core supply, handling input dips to 3.9V during cranking. Use Value: 1.6V minimum input enables operation down to 3.9V at 500mA; reverse battery protection eliminates need for series Schottky diode, reducing heat and BOM count. |
Use Scenario: Modular analog input card with isolated 24V-to-5V conversion and local 3.3V logic rail. IC Role / Device Role / Timing Role: Local LDO for isolated microcontroller and SPI interface, rejecting ripple from upstream flyback converter. Use Value: 70dB ripple rejection at 120Hz suppresses switching artifacts; programmable current limit (±10%) enables precise short-circuit protection without derating for worst-case temp. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3045EDD#TRPBF | 20V max VIN, 500mA, 0.8µVRMS noise, single-set resistor current limit, no active discharge | Lacks active output discharge and 45V input capability; superior noise performance only below 20V input | Select when ultra-low noise (<1µVRMS) is mandatory and input stays ≤20V; avoid where battery reverse polarity or >20V transients occur |
| TPS7A4701RGWR | 36V max VIN, 1A, 4.7µVRMS noise, fixed 1.2V–20V adjust range, no programmable current limit | Higher output current but no precision current limit or active discharge; lower PSRR above 100kHz | Choose for higher current needs with standard 36V automotive input; use only when external current limiting and discharge circuitry can be added |
Compared with LT3066EDE#TRPBF, LT3045EDD#TRPBF trades 45V input and active discharge for lower noise, while TPS7A4701RGWR offers higher current but requires external components to match LT3066EDE#TRPBF's integrated protection and discharge functionality.
Availability
LT3066EDE#TRPBF is available at Aetrix Electronics and suitable for battery-powered portable instruments, avionic power supplies, and industrial PLC I/O modules requiring stable component supply, long-term lifecycle support, and guaranteed parametric performance across –40°C to 125°C.
Supply support for LT3066EDE#TRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, aerospace, and communications markets.
The LT3066 series was designed as a micropower, high-input-voltage LDO family targeting safety-critical and battery-sensitive applications demanding low noise, programmable protection, and robust fault handling without external components.
FAQ
What is the maximum input voltage rating for the LT3066EDE#TRPBF?
The LT3066EDE#TRPBF has an absolute maximum IN pin voltage of ±50V, but its functional input operating range is specified from 1.6V to 45V. Operation beyond 45V risks violating the input-to-output differential voltage limit and may trigger internal protection circuits. Always observe the 45V maximum recommended operating voltage for reliable LT3066EDE#TRPBF performance.
Does the LT3066EDE#TRPBF support adjustable output voltage, and what is the minimum achievable value?
Yes, the LT3066EDE#TRPBF is the adjustable version of the series and supports output voltages from 0.6V to 19V using an external resistor divider on the ADJ pin. The 600mV internal reference sets the minimum regulated output; outputs below 0.6V are not supported. For LT3066EDE#TRPBF, the ADJ pin bias current is 16nA, flowing out of the pin, which must be accounted for in divider design.
How does the active output discharge function work on the LT3066EDE#TRPBF, and what is its typical discharge time?
The LT3066EDE#TRPBF uses an internal NMOS transistor to actively discharge the output when SHDN is pulled low or IN drops below regulation. With a 4.7µF output capacitor, discharge time to 10% of nominal is 0.4–1.0ms. The discharge switch resistance is 30Ω at VIN = 3.6V, ensuring fast, controlled collapse - a key requirement for LT3066EDE#TRPBF in systems needing rapid power-down sequencing.
What capacitor values are required for stable operation of the LT3066EDE#TRPBF?
The LT3066EDE#TRPBF requires a minimum 3.3µF ceramic output capacitor with ESR <1Ω for stability. For outputs below 1.2V, ≥4.7µF is required. A 10nF capacitor on REF/BYP reduces output noise to 25µVRMS and sets soft-start time. The IMAX pin requires a 22nF decoupling capacitor, and INFILT benefits from up to 0.47µF to ground for improved PSRR above 10kHz - all critical for robust LT3066EDE#TRPBF deployment.
Is the LT3066EDE#TRPBF pin-compatible with other devices in the LT3066 family, such as the LT3066-3.3 or LT3066-5?
No, the LT3066EDE#TRPBF is not pin-compatible with fixed-output variants like LT3066-3.3 or LT3066-5. While all share the same 12-lead DFN package, Pin 10 is NC (no connect) for LT3066EDE#TRPBF but functions as SENSE for fixed versions. Using LT3066EDE#TRPBF in a layout designed for LT3066-3.3 would leave SENSE unconnected, degrading load regulation - correct pin mapping is essential for LT3066EDE#TRPBF integration.
LT3066EDE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 45V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 19V
- Voltage Dropout (Max):
- 0.51V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 125 µA
- Current - Supply (Max):
- 25 mA
- PSRR:
- 85dB (120Hz)
- Control Features:
- Current Limit, Enable, Power Good, Soft Start
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-DFN (4x3)
LT3066EDE#TRPBF FAQ
1.How can I place an order for LT3066EDE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3066EDE#TRPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LT3066EDE#TRPBF reliable?
The price and inventory of LT3066EDE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3066EDE#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3066EDE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3066EDE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3066EDE#TRPBF?
LT3066EDE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3066EDE#TRPBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LT3066EDE#TRPBF?
For technical support, including LT3066EDE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3066EDE#TRPBF requirements.
6.How does Aetrix verify that LT3066EDE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3066EDE#TRPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LT3066EDE#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3066EDE#TRPBF?
All LT3066EDE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3066EDE#TRPBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LT3066EDE#TRPBF part is unused and in its original packaging.
Return procedure for LT3066EDE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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