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Analog Devices Inc. LT3065MPMSE-1.8#PBF
- Part No.:
- LT3065MPMSE-1.8#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-TSSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT3065MPMSE-1.8#PBF.pdf
- Description:
- IC REG LINEAR 1.8V 500MA 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:122
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Product details
Overview
LT3065MPMSE-1.8#PBF from Analog Devices is a 45V-input, 500mA low-noise LDO linear regulator with fixed 1.8V output, programmable current limit (±10%), power good flag, and 25µVRMS noise (10Hz–100kHz). It operates from –55°C to 150°C and is used in avionic power supplies requiring stable low-noise bias for precision ADCs and RF front-ends.
For engineers reviewing the LT3065MPMSE-1.8#PBF datasheet, LT3065MPMSE-1.8#PBF pinout, LT3065MPMSE-1.8#PBF application, or LT3065MPMSE-1.8#PBF equivalent, key selection criteria include its guaranteed operation over –55°C to 150°C, ±2% output tolerance across line/load/temperature, 300mV dropout at 500mA, reverse battery protection, and compatibility with ≥3.3µF ceramic output capacitors.
Technical Context
The LT3065MPMSE-1.8#PBF implements a micropower bandgap reference with external REF/BYP capacitor control for soft-start and noise filtering. Its internal current limit folds back under short-circuit conditions, and PWRGD asserts when output reaches 90% of nominal voltage with 1.6% hysteresis.
It features reverse battery protection, reverse current blocking, and thermal shutdown at 150°C. The IMAX pin accepts an external resistor to set current limit between 180mA and 545mA, while SHDN enables <1µA shutdown current and has defined turn-on/turn-off thresholds (0.9V/1.3V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±2% over line, load, and temperature - ensures stable core voltage for 1.8V logic and low-power microcontrollers. |
| Max Input Voltage | 45V - supports wide-range industrial and avionic inputs including unregulated 28V aircraft buses. |
| Output Current | 500mA - sufficient for powering multiple analog sensors or small FPGA I/O banks without derating. |
| Dropout Voltage | 300mV at 500mA - enables regulation down to VIN = 2.1V, critical for battery-powered systems near end-of-life. |
| Output Noise | 25µVRMS (10Hz–100kHz) with 10nF REF/BYP cap - meets low-noise requirements for precision data converters and RF synthesizers. |
| Operating Temp | –55°C to 150°C - qualified for extended-temperature military and aerospace applications per MP-grade specification. |
| Power Good Flag | PWRGD asserts at 90% of 1.8V (1.62V) with 1.6% hysteresis - provides reliable system reset signaling without external monitoring circuitry. |
Pinout & Package
LT3065MPMSE-1.8#PBF uses a thermally enhanced 12-lead plastic MSOP package with exposed pad (Pin 13 = GND), θJA = 28°C/W, and rated for –55°C to 150°C junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 IN | Input supply | Dual input pins reduce trace resistance and improve high-current stability; requires local 1µF ceramic bypass. |
| 3 SHDN | Shutdown control | Active-low enable; <1µA shutdown current; 0.9V/1.3V thresholds ensure clean power sequencing. |
| 4 PWRGD | Power good open-drain output | Signals regulation status; requires external pull-up; sinks 50µA at 0.25V max logic low. |
| 5 IMAX | Current limit programming | Connects to GND via resistor to set precise current limit (e.g., 1.5kΩ → 200mA ±10%). |
| 6 NC | No connect | Not internally bonded; must remain floating or grounded per layout guidelines. |
| 7 ADJ/SENSE | Feedback node | For fixed-output variants like LT3065MPMSE-1.8#PBF, this pin functions as SENSE to monitor output voltage accuracy. |
| 8 GND/ADJ | Ground / Adj reference | For fixed-output versions, serves as GND; exposed pad (Pin 13) must be soldered for thermal performance. |
| 9 REF/BYP | Reference bypass | Accepts external capacitor (e.g., 10nF) to reduce reference noise and control soft-start time. |
| 10 OUT | Regulated output | Delivers 1.8V; stable with ≥3.3µF ceramic output capacitor; low ESR requirement simplifies design. |
| 11, 12 OUT | Output power path | Dual output pins lower impedance and improve transient response for high-frequency load steps. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable current limit | Set via single resistor on IMAX pin with ±10% accuracy over temperature - eliminates need for external current-sense ICs in overcurrent protection circuits. |
| Low noise reference | 25µVRMS (10Hz–100kHz) with 10nF REF/BYP cap - enables direct use in noise-sensitive signal chains without post-regulation filtering. |
| Reverse battery protection | Blocks conduction when VIN < 0V - prevents damage in automotive and portable equipment with accidental battery reversal. |
| Power good flag with hysteresis | 90% trip point + 1.6% hysteresis - avoids chatter during brown-out recovery and simplifies system-level power sequencing. |
| Extended temperature grade | –55°C to 150°C operation - certified for harsh-environment applications including engine control units and flight control electronics. |
Applications
| Avionic Power Supply | Automotive Engine Control Unit |
|---|---|
Use Scenario: Providing clean 1.8V bias to high-resolution SAR ADCs and MEMS inertial sensors in flight data recorders. IC Role / Device Role / Timing Role: Primary low-noise LDO delivering regulated core voltage with tight tolerance and minimal ripple. Use Value: 25µVRMS noise and ±2% output accuracy maintain ADC ENOB >16 bits across –55°C to 150°C operating range. | Use Scenario: Powering CAN transceiver I/O and microcontroller peripherals in under-hood ECU modules. IC Role / Device Role / Timing Role: Main 1.8V supply with reverse battery and thermal protection for fault-tolerant operation. Use Value: Reverse battery protection and 150°C shutdown prevent latch-up during jump-start events or thermal overload. |
| Industrial PLC I/O Module | Portable Test Instrument |
Use Scenario: Regulating 1.8V for isolated digital I/O drivers and SPI interface buffers in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Fixed-output LDO with programmable current limit to protect against field-wiring faults. Use Value: External IMAX resistor allows precise 200mA current limiting - avoids nuisance trips during inrush while protecting downstream circuitry. | Use Scenario: Supplying 1.8V to low-power ARM Cortex-M cores and precision DACs in handheld calibrators. IC Role / Device Role / Timing Role: Micropower LDO enabling >100-hour battery life with <1µA shutdown current. Use Value: Sub-1µA shutdown current extends shelf life and runtime; 300mV dropout preserves usable battery voltage down to 2.1V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3065HMSE-1.8#PBF | Same 12-lead MSOP package and 1.8V fixed output, but rated for –40°C to 150°C (not –55°C); no MP-grade extended low-temp qualification. | Lacks –55°C capability; suitable for commercial/industrial environments where extreme cold start is not required. | Select if full MP-grade temperature range is unnecessary and cost optimization is prioritized. |
| TPS7A4701RGWR | 40V-input, 1A LDO with 1.8V fixed option; 4.5µVRMS noise (10Hz–100kHz); no programmable current limit or PWRGD flag. | Higher output current and lower noise, but lacks fault indicators and adjustable protection - requires external monitoring for system safety. | Choose when ultra-low noise dominates requirements and current limiting can be handled externally. |
Compared with LT3065HMSE-1.8#PBF, the LT3065MPMSE-1.8#PBF adds guaranteed –55°C startup and operation, critical for aerospace deployment; versus TPS7A4701RGWR, it trades 20.5µVRMS higher noise for integrated PWRGD, programmable current limit, and reverse protection - reducing BOM count and improving functional safety compliance.
Availability
LT3065MPMSE-1.8#PBF is available at Aetrix Electronics and suitable for avionic power supplies, automotive engine control units, and industrial PLC I/O modules requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LT3065MPMSE-1.8#PBF 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 industrial, automotive, communications, and defense markets.
The LT3065 series belongs to Analog Devices' precision LDO portfolio, designed specifically for high-reliability power management in systems demanding low noise, wide input range, and robust fault protection - especially where extended temperature operation is mandatory.
FAQ
What is the guaranteed operating temperature range for LT3065MPMSE-1.8#PBF?
The LT3065MPMSE-1.8#PBF is 100% tested and guaranteed to operate from –55°C to 150°C junction temperature, meeting MIL-STD-883 extended temperature requirements for aerospace and defense applications. This MP-grade rating exceeds standard industrial or automotive grades and ensures reliability in extreme environmental conditions.
Does LT3065MPMSE-1.8#PBF require an external capacitor on the REF/BYP pin?
Yes, LT3065MPMSE-1.8#PBF requires an external capacitor on the REF/BYP pin to achieve its specified 25µVRMS output noise (10Hz–100kHz) and controlled soft-start behavior. A 10nF ceramic capacitor is recommended; omitting it increases noise to 90µVRMS and removes soft-start functionality.
How is the current limit programmed on LT3065MPMSE-1.8#PBF?
The current limit on LT3065MPMSE-1.8#PBF is programmed by connecting a resistor between the IMAX pin and GND. For example, a 1.5kΩ resistor sets a nominal 200mA limit accurate to ±10% over temperature and input voltage. If unused, IMAX must be tied directly to GND to engage the internal 520mA limit.
What protection features does LT3065MPMSE-1.8#PBF include?
LT3065MPMSE-1.8#PBF integrates reverse battery protection, reverse current protection, thermal shutdown at 150°C, current limit with foldback, and reverse output protection. These features eliminate the need for external diodes or protection ICs in harsh-environment designs such as avionics and engine control systems.
Is LT3065MPMSE-1.8#PBF pin-compatible with other LT3065 fixed-output variants in MSOP packages?
Yes, LT3065MPMSE-1.8#PBF is pin-compatible with all other LT3065MPMSE-x.x#PBF variants (e.g., LT3065MPMSE-3.3#PBF) in the 12-lead MSOP package, sharing identical pinout, footprint, and thermal pad configuration - enabling drop-in voltage option changes without PCB redesign.
LT3065MPMSE-1.8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-TSSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 45V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.51V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 110 µA
- Current - Supply (Max):
- 25 mA
- PSRR:
- 74dB (120Hz)
- Control Features:
- Current Limit, Enable, Power Good, Soft Start
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-MSOP-EP
LT3065MPMSE-1.8#PBF FAQ
1.How can I place an order for LT3065MPMSE-1.8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3065MPMSE-1.8#PBF 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 LT3065MPMSE-1.8#PBF reliable?
The price and inventory of LT3065MPMSE-1.8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3065MPMSE-1.8#PBF is usually 5 days.
3.What payment methods are accepted for LT3065MPMSE-1.8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3065MPMSE-1.8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3065MPMSE-1.8#PBF?
LT3065MPMSE-1.8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3065MPMSE-1.8#PBF 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 LT3065MPMSE-1.8#PBF?
For technical support, including LT3065MPMSE-1.8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3065MPMSE-1.8#PBF requirements.
6.How does Aetrix verify that LT3065MPMSE-1.8#PBF is sourced from the original manufacturer or authorized distributors?
All LT3065MPMSE-1.8#PBF 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 LT3065MPMSE-1.8#PBF meets industry standards.
7.What is the process for return or replacement of LT3065MPMSE-1.8#PBF?
All LT3065MPMSE-1.8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3065MPMSE-1.8#PBF, 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 LT3065MPMSE-1.8#PBF part is unused and in its original packaging.
Return procedure for LT3065MPMSE-1.8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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