My Inquiry
My Account
Analog Devices Inc. LT3065IDD-1.5#PBF
- Part No.:
- LT3065IDD-1.5#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LT3065IDD-1.5#PBF.pdf
- Description:
- IC REG LINEAR 1.5V 500MA 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,861
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT3065IDD-1.5#PBF from Analog Devices is a 45V input, 500mA low-noise LDO linear regulator with fixed 1.5V output, programmable current limit, and power-good flag. It delivers ±2% output tolerance over line, load, and temperature, operates down to 1.6V input, and achieves 300mV dropout at 500mA - ideal for automotive power supplies and avionic systems requiring stable low-noise bias.
For engineers reviewing the LT3065IDD-1.5#PBF datasheet, LT3065IDD-1.5#PBF pinout, LT3065IDD-1.5#PBF application, or LT3065IDD-1.5#PBF equivalent, key selection considerations include its 25µVRMS noise (10Hz–100kHz), ±10% programmable current limit accuracy, reverse battery protection, thermal shutdown, and compatibility with ≥3.3µF ceramic output capacitors.
Technical Context
The LT3065IDD-1.5#PBF uses an internal bandgap reference and error amplifier to regulate output voltage with ±2% accuracy across –40°C to 125°C. Its PWRGD flag asserts high when output reaches 90% of nominal (1.35V) with 1.6% hysteresis, enabling system sequencing and fault detection.
Current limiting is implemented via external resistor on IMAX pin, delivering 200mA ±10% at RIMAX = 1.5kΩ (per typical application), while foldback protection reduces output current during short-circuit events. Reverse battery and reverse output protection prevent damage when input or output is reversed relative to ground.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±2% over line, load, and temperature - ensures stable core/bias rail without external feedback components. |
| Max Input Voltage | 45V - supports wide-range industrial and automotive battery inputs including 24V/36V systems with transients. |
| Output Current | 500mA - sufficient for powering microcontrollers, sensors, and analog front-ends in compact embedded designs. |
| Noise (10Hz–100kHz) | 25µVRMS with 10nF REF/BYP capacitor - enables clean supply for precision ADCs, RF ICs, and low-noise amplifiers. |
| Dropout Voltage | 300mV at 500mA - allows operation with minimal headroom, e.g., 1.8V input for 1.5V output in energy-constrained applications. |
| Power Good Flag | PWRGD trips at 90% VOUT (1.35V) with 1.6% hysteresis - provides reliable enable signal for downstream logic and sequencers. |
| Shutdown Current | <1µA - preserves battery life in always-on or low-power sleep modes. |
Pinout & Package
LT3065IDD-1.5#PBF is housed in a thermally enhanced 10-lead 3mm × 3mm plastic DFN package with exposed GND pad (Pin 11) requiring PCB soldering for optimal thermal performance (θJA = 31°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pins 1, 2) | Input supply connection | Dual-pin configuration lowers IR drop and improves current handling; requires local 1µF ceramic bypass if >6" from bulk input cap. |
| SHDN (Pin 3) | Enable/disable control | Active-low; threshold 0.9–1.42V; draws <1µA in shutdown - enables precise system-level power gating. |
| PWRGD (Pin 4) | Power-good status output | Open-drain flag pulled high externally; indicates regulation within 10% of 1.5V - used for processor reset or supervisor IC interfacing. |
| IMAX (Pin 5) | Current limit programming | Connects to GND via resistor (e.g., 1.5kΩ for 200mA limit); sets precision foldback current limit independent of input voltage. |
| GND (Pin 6) | Ground reference | Common return for IN, OUT, SHDN, PWRGD, IMAX, and REF/BYP - must be low-impedance and tied to exposed pad. |
| OUT (Pins 7, 8) | Regulated output | Dual-pin layout minimizes trace resistance and improves current sharing; supports ≥3.3µF ceramic output capacitance. |
| REF/BYP (Pin 9) | Noise reduction & soft-start | Accepts 10nF capacitor to reduce 10Hz–100kHz noise to 25µVRMS and control startup slew rate. |
| ADJ/SENSE (Pin 10) | Feedback node (N/C for fixed version) | No-connect for LT3065IDD-1.5#PBF; internally tied to output - eliminates external resistor divider and saves board space. |
| Exposed Pad (Pin 11) | Thermal & electrical GND | Mandatory PCB soldering required; primary thermal path to PCB - critical for maintaining TJ ≤ 125°C at full load. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Precision Current Limit | ±10% accuracy over temperature and input voltage range using single external resistor - enables robust overcurrent protection without calibration. |
| Low Noise Reference Architecture | 25µVRMS output noise (10Hz–100kHz) with 10nF REF/BYP capacitor - meets stringent noise requirements for RF, audio, and precision measurement circuits. |
| Reverse Battery Protection | Withstands –45V on IN pin with zero reverse output current - prevents damage in automotive jump-start or battery-reversal scenarios. |
| Stable with Low-ESR Ceramic Capacitors | Minimum 3.3µF output capacitance requirement - eliminates need for costly tantalum or electrolytic caps and improves reliability. |
| Power-Good Flag with Hysteresis | 1.6% hysteresis on PWRGD trip point - avoids chatter during marginal regulation and simplifies system power sequencing. |
Applications
| Automotive Infotainment Power | Avionic Sensor Bias Supply |
|---|---|
Use Scenario: Powers DSP, display controller, and CAN transceiver in vehicle head unit with 12V/24V battery input subject to load dump and cold-crank transients. IC Role / Device Role / Timing Role: Primary 1.5V LDO supplying low-noise digital core voltage; PWRGD enables safe boot sequencing after stable rail establishment. Use Value: 45V max input and reverse battery protection ensure survival during ISO 7637-2 pulse 5a (load dump) and pulse 4 (cold crank), while 25µVRMS noise prevents digital jitter in audio processing. | Use Scenario: Supplies 1.5V bias to MEMS inertial sensors and ADC front-end in flight control module operating from 28V aircraft bus. IC Role / Device Role / Timing Role: Fixed-output LDO delivering ultra-stable reference voltage; IMAX pin programmed for 200mA limit to protect against sensor short-circuit faults. Use Value: ±2% output tolerance over –40°C to 125°C guarantees consistent sensor excitation and ADC reference accuracy across extreme environmental conditions. |
| Industrial PLC I/O Module | Portable Medical Instrument |
Use Scenario: Provides isolated 1.5V logic rail for FPGA configuration and interface ICs in DIN-rail mounted programmable logic controller with 24V DC input. IC Role / Device Role / Timing Role: Secondary LDO stage following DC/DC converter; PWRGD signals FPGA configuration readiness to host MCU. Use Value: 300mV dropout enables operation during brownout conditions (e.g., 2.0V input → 1.5V output), while thermal shutdown prevents failure during extended ambient temperature exposure. | Use Scenario: Delivers clean 1.5V supply to low-power ECG analog front-end and Bluetooth LE SoC in handheld patient monitor powered by Li-ion battery. IC Role / Device Role / Timing Role: Main system LDO; SHDN pin controlled by MCU to cut quiescent current to <1µA during standby mode. Use Value: <1µA shutdown current extends battery runtime in multi-day monitoring applications, and 25µVRMS noise ensures sub-µV ECG signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3066IDD-1.5#PBF | Same pinout, 200mA output, lower IQ (25µA vs 110µA), no PWRGD flag | Lacks power-good signaling; suited for ultra-low-power apps where sequencing is handled externally | Select when system does not require PWRGD and load current ≤200mA; saves board space but sacrifices fault reporting. |
| TPS7A4701RGWR | 36V max input, 1A output, 4µVRMS noise, adjustable only, no IMAX pin | Higher noise performance but no programmable current limit or fixed 1.5V option - requires external resistors | Choose for ultra-low-noise analog rails where 1.5V fixed output is not mandatory and higher current is needed. |
Compared with LT3065IDD-1.5#PBF, LT3066IDD-1.5#PBF trades PWRGD and 500mA capability for lower quiescent current and smaller solution size, while TPS7A4701RGWR offers superior noise performance but lacks fixed 1.5V output and current-limit programming - making LT3065IDD-1.5#PBF optimal for automotive and avionic designs needing integrated protection and sequencing.
Availability
LT3065IDD-1.5#PBF is available at Aetrix Electronics and suitable for automotive infotainment, avionic sensor bias, and industrial PLC I/O modules requiring stable component supply, AEC-Q100-compliant operation, and long-term lifecycle support.
Supply support for LT3065IDD-1.5#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, designed specifically for high-voltage, low-noise, and fault-protected power management in harsh environments such as automotive and aerospace systems.
FAQ
What is the maximum input voltage rating for the LT3065IDD-1.5#PBF?
The LT3065IDD-1.5#PBF has an absolute maximum input voltage rating of ±50V on the IN pin, with a functional operating range up to +45V. This allows robust operation in 24V and 36V automotive and industrial systems, including transient conditions per ISO 7637-2. Exceeding 45V may trigger internal protection or degrade reliability.
Does the LT3065IDD-1.5#PBF require an external feedback resistor network?
No, the LT3065IDD-1.5#PBF is a fixed-output variant with internal feedback; the ADJ/SENSE pin (Pin 10) is not connected and must remain unconnected. This eliminates external resistor tolerances and layout complexity, ensuring guaranteed 1.5V ±2% output accuracy without calibration.
How is the current limit programmed on the LT3065IDD-1.5#PBF?
The LT3065IDD-1.5#PBF uses the IMAX pin (Pin 5) to set current limit via a single resistor to GND. With RIMAX = 1.5kΩ, it delivers 200mA ±10% over temperature and input voltage. The relationship is inverse: lower resistance increases current limit. If unused, IMAX must be tied to GND to enable internal 520mA limit.
What capacitor value is required on the REF/BYP pin of the LT3065IDD-1.5#PBF for minimum noise?
A 10nF capacitor on the REF/BYP pin (Pin 9) reduces broadband output noise to 25µVRMS (10Hz–100kHz) for the LT3065IDD-1.5#PBF. Using 100pF or 1nF yields higher noise (90µVRMS and ~40µVRMS respectively); omitting the capacitor results in worst-case 90µVRMS. The capacitor also controls soft-start slew rate.
Is the LT3065IDD-1.5#PBF qualified for automotive applications?
Yes, the LT3065IDD-1.5#PBF is rated for –40°C to +125°C junction temperature and is part of Analog Devices' automotive-qualified portfolio. While not marked with a #W suffix (which denotes AEC-Q100 Grade 1), its I-grade temperature range and built-in protections (reverse battery, thermal shutdown, current foldback) meet common automotive subsystem requirements.
LT3065IDD-1.5#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):
- 1.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.51V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 110 µA
- Current - Supply (Max):
- 25 mA
- PSRR:
- 78dB (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:
- 10-DFN (3x3)
LT3065IDD-1.5#PBF FAQ
1.How can I place an order for LT3065IDD-1.5#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3065IDD-1.5#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 LT3065IDD-1.5#PBF reliable?
The price and inventory of LT3065IDD-1.5#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3065IDD-1.5#PBF is usually 5 days.
3.What payment methods are accepted for LT3065IDD-1.5#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3065IDD-1.5#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3065IDD-1.5#PBF?
LT3065IDD-1.5#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3065IDD-1.5#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 LT3065IDD-1.5#PBF?
For technical support, including LT3065IDD-1.5#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3065IDD-1.5#PBF requirements.
6.How does Aetrix verify that LT3065IDD-1.5#PBF is sourced from the original manufacturer or authorized distributors?
All LT3065IDD-1.5#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 LT3065IDD-1.5#PBF meets industry standards.
7.What is the process for return or replacement of LT3065IDD-1.5#PBF?
All LT3065IDD-1.5#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3065IDD-1.5#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 LT3065IDD-1.5#PBF part is unused and in its original packaging.
Return procedure for LT3065IDD-1.5#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT3065IDD-1.5#PBF Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
