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Analog Devices Inc. LT3065HDD-2.5#PBF
- Part No.:
- LT3065HDD-2.5#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LT3065HDD-2.5#PBF.pdf
- Description:
- IC REG LINEAR 2.5V 500MA 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,642
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Product details
Overview
LT3065HDD-2.5#PBF from Analog Devices is a 45V input, 500mA low-noise LDO linear regulator with fixed 2.5V output, programmable current limit, and Power Good flag, designed for automotive and industrial power supplies where high reliability and wide temperature operation are required.
For engineers reviewing the LT3065HDD-2.5#PBF datasheet, LT3065HDD-2.5#PBF pinout, LT3065HDD-2.5#PBF application, or LT3065HDD-2.5#PBF equivalent, key selection considerations include its ±2% output tolerance over line/load/temperature, 25µVRMS noise (10Hz–100kHz), 300mV dropout at 500mA, H-grade −40°C to +150°C junction rating, and compatibility with low-ESR ceramic capacitors ≥3.3µF.
Technical Context
The LT3065HDD-2.5#PBF implements a micropower bandgap reference with single-capacitor soft-start and low-noise filtering via the REF/BYP pin. Its internal current limit is programmable via an external resistor on the IMAX pin, accurate to ±10% across voltage and temperature.
It features reverse battery protection, reverse current protection, thermal shutdown with hysteresis, and foldback current limiting. The PWRGD flag asserts logic-high when output reaches 90% of nominal (2.5V) with 1.6% hysteresis, enabling system-level power sequencing and fault monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V, ±2% tolerance over line, load, and −40°C to +150°C temperature range |
| Max Input Voltage | 45V - supports wide-input industrial and automotive battery-supplied systems |
| Output Current | 500mA - sufficient for powering microcontrollers, sensors, and analog signal chains |
| Dropout Voltage | 300mV at 500mA - enables regulation from 2.8V input, critical for low-voltage battery operation |
| Output Noise | 25µVRMS (10Hz–100kHz) with 10nF REF/BYP capacitor - ensures clean supply for precision ADCs and RF circuitry |
| Power Good Threshold | 90% of 2.5V (2.25V) with 1.6% hysteresis - provides reliable enable signaling for downstream logic |
| Shutdown Current | <1µA - preserves battery life in always-on or sleep-mode applications |
Pinout & Package
LT3065HDD-2.5#PBF uses a thermally-enhanced 10-lead 3mm × 3mm plastic DFN package with exposed GND pad (Pin 11) requiring PCB soldering for thermal performance. Pin 7 is GND, Pin 8 is SENSE, Pin 9 is GND, and Pin 10 is SENSE - consistent with fixed-output variants per datasheet pin configuration table.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pins 1, 2) | Input supply connection | Dual-pin layout reduces IR drop and improves high-current stability |
| OUT (Pins 3, 4) | Regulated output node | Dual-pin layout lowers output impedance and enhances transient response |
| GND (Pin 7) | Ground reference | Primary ground return for control circuitry and feedback path |
| SENSE (Pin 8) | Output voltage sensing | Enables remote-sense capability for improved load regulation in high-impedance traces |
| REF/BYP (Pin 5) | Reference bypass and noise filter | Accepts external capacitor to reduce reference noise and implement soft-start |
| SHDN (Pin 6) | Active-low shutdown control | Logic-compatible input; pulls regulator into <1µA quiescent state when low |
| PWRGD (Pin 9) | Power good status flag | Open-drain output indicating regulation within 90% ±1.6% of 2.5V |
| IMAX (Pin 10) | Current limit programming | Connects to GND via resistor to set precision ±10% current limit (e.g., 200mA with 1.5kΩ) |
Key Features
| Feature | Design Value |
|---|---|
| Programmable current limit | Set via single external resistor on IMAX pin with ±10% accuracy across −40°C to +150°C |
| Low-noise reference architecture | 25µVRMS output noise (10Hz–100kHz) with 10nF REF/BYP capacitor, enabling precision analog supply |
| Reverse battery protection | Withstands −45V input without damage or reverse current flow, critical for automotive cold-crank scenarios |
| Thermal and foldback protection | Shuts down at 150°C junction temperature with hysteresis; current limit folds back during overload to limit power dissipation |
| Stable with low-ESR ceramics | Minimum 3.3µF ceramic output capacitor - eliminates need for costly tantalum or electrolytic types |
Applications
| Battery-Powered Systems | Automotive Power Supplies |
|---|---|
Use Scenario: Portable medical monitors powered by 12V lead-acid or LiFePO₄ batteries with variable state-of-charge. IC Role / Device Role / Timing Role: Primary 2.5V supply for low-power MCU, precision ADC, and sensor interface. Use Value: 45V max input and reverse battery protection ensure robustness during jump-starts or polarity reversal; 25µVRMS noise preserves signal integrity for ECG/SpO₂ measurements. | Use Scenario: Infotainment head-unit subsystem requiring stable 2.5V rail for audio DAC and DSP core. IC Role / Device Role / Timing Role: Post-regulator delivering clean, sequenced 2.5V from switched 5V/3.3V domain. Use Value: PWRGD flag enables safe power-up sequencing; H-grade −40°C to +150°C rating meets AEC-Q100 requirements for under-hood proximity. |
| Industrial Power Supplies | Avionic Power Supplies |
Use Scenario: Programmable logic controller (PLC) I/O module operating from 24V DC field bus with high EMI exposure. IC Role / Device Role / Timing Role: Local 2.5V regulator for isolated analog front-end and communication PHY. Use Value: 63dB ripple rejection at 120Hz suppresses rectified AC noise; 300mV dropout allows operation down to 2.8V input during brownouts. | Use Scenario: Flight control computer board requiring certified, low-noise 2.5V supply for FPGA configuration and ADC reference. IC Role / Device Role / Timing Role: Radiation-tolerant LDO providing regulated 2.5V with fault reporting. Use Value: Reverse current and reverse output protection prevent backfeeding into shared power buses; ±2% output tolerance ensures ADC accuracy across temperature extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3066HDD-2.5#PBF | Same pinout and specs, but adds adjustable current limit with integrated sense FET - no external IMAX resistor needed | Preferred where board space is constrained and precise current limiting is required without external components | Select LT3066HDD-2.5#PBF if eliminating the IMAX resistor saves layout area and simplifies BOM |
| TPS7A4701RGWR | 20V max input, 1A output, 4µVRMS noise, SOIC-20 package - lower voltage rating, higher current, larger footprint | Suitable for non-automotive industrial designs with <24V inputs and higher load demands | Choose TPS7A4701RGWR only if input voltage stays ≤20V and 1A output is required; not drop-in due to different pinout and voltage range |
Compared with LT3065HDD-2.5#PBF, LT3066HDD-2.5#PBF offers identical packaging and temperature rating but integrates current limit sensing, reducing component count, while TPS7A4701RGWR trades 45V input capability for ultra-low noise and higher current in a larger package - making LT3065HDD-2.5#PBF optimal for high-voltage, space-constrained automotive and industrial use cases.
Availability
LT3065HDD-2.5#PBF is available at Aetrix Electronics and suitable for battery-powered systems, automotive power supplies, and industrial power supplies requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT3065HDD-2.5#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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LT3065 series belongs to Analog Devices' µPower LDO family, engineered for ultra-low noise, wide input voltage operation, and robust protection - specifically targeting demanding automotive and industrial power management applications.
FAQ
What is the maximum input voltage rating for the LT3065HDD-2.5#PBF?
The LT3065HDD-2.5#PBF has an absolute maximum input voltage rating of ±50V on the IN pin, with a recommended operating maximum of 45V. This 45V rating enables direct connection to 24V and 36V industrial bus systems and withstands automotive load-dump transients up to ISO 7637-2 Pulse 5a levels when properly decoupled. Exceeding 45V may trigger internal protection or degrade long-term reliability.
Does the LT3065HDD-2.5#PBF require an external capacitor on the REF/BYP pin for basic operation?
Yes, the LT3065HDD-2.5#PBF requires an external capacitor on the REF/BYP pin for stable operation and low-noise performance. A 10nF capacitor reduces output noise to 25µVRMS (10Hz–100kHz) and enables soft-start functionality. Omitting it increases noise to 90µVRMS and disables controlled startup, risking inrush current issues. The capacitor must be placed close to the pin with short traces.
How is the current limit programmed on the LT3065HDD-2.5#PBF?
The current limit on the LT3065HDD-2.5#PBF is programmed by connecting an external resistor between the IMAX pin and GND. For example, a 1.5kΩ resistor sets a nominal 200mA limit with ±10% accuracy across −40°C to +150°C. The relationship is inverse: lower resistance yields higher current limit. If unused, IMAX must be tied directly to GND to engage the internal 520mA limit.
What does the PWRGD flag indicate on the LT3065HDD-2.5#PBF, and what is its threshold?
The PWRGD flag on the LT3065HDD-2.5#PBF is an open-drain output that goes high when the regulated 2.5V output reaches 90% of nominal (2.25V), with 1.6% hysteresis (trip point drops to 88.4% on falling edge). It provides system-level confirmation of valid regulation and is used for power sequencing, reset assertion, or fault detection - ensuring downstream circuits only activate when voltage is within specification.
Is the LT3065HDD-2.5#PBF qualified for automotive applications?
Yes, the LT3065HDD-2.5#PBF is qualified per AEC-Q100 Grade H (−40°C to +150°C junction temperature) and is explicitly listed in the datasheet's "AUTOMOTIVE PRODUCTS" section. It includes reverse battery protection, thermal shutdown with hysteresis, and tested reliability under automotive stress conditions - making it suitable for engine control units, ADAS modules, and infotainment systems requiring extended temperature operation and long-term stability.
LT3065HDD-2.5#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-WFDFN 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):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.51V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 110 µA
- Current - Supply (Max):
- 25 mA
- PSRR:
- 72dB (120Hz)
- Control Features:
- Current Limit, Enable, Power Good, Soft Start
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x3)
LT3065HDD-2.5#PBF FAQ
1.How can I place an order for LT3065HDD-2.5#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3065HDD-2.5#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 LT3065HDD-2.5#PBF reliable?
The price and inventory of LT3065HDD-2.5#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3065HDD-2.5#PBF is usually 5 days.
3.What payment methods are accepted for LT3065HDD-2.5#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3065HDD-2.5#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3065HDD-2.5#PBF?
LT3065HDD-2.5#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3065HDD-2.5#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 LT3065HDD-2.5#PBF?
For technical support, including LT3065HDD-2.5#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3065HDD-2.5#PBF requirements.
6.How does Aetrix verify that LT3065HDD-2.5#PBF is sourced from the original manufacturer or authorized distributors?
All LT3065HDD-2.5#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 LT3065HDD-2.5#PBF meets industry standards.
7.What is the process for return or replacement of LT3065HDD-2.5#PBF?
All LT3065HDD-2.5#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3065HDD-2.5#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 LT3065HDD-2.5#PBF part is unused and in its original packaging.
Return procedure for LT3065HDD-2.5#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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