My Inquiry
My Account
Analog Devices Inc. LT1965EDD-2.5#TRPBF
- Part No.:
- LT1965EDD-2.5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT1965EDD-2.5#TRPBF.pdf
- Description:
- IC REG LINEAR 2.5V 1.1A 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,258
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT1965EDD-2.5#TRPBF from Analog Devices (formerly Linear Technology) is a fixed-output 2.5V, 1.1A low-noise low-dropout linear regulator in an 8-lead 3mm × 3mm DFN package with exposed thermal pad. It delivers 310mV typical dropout at full load, 40µVRMS output noise (10Hz–100kHz), and <1µA shutdown current - optimized for RF power supply filtering and post-regulation of switching converters.
For engineers reviewing the LT1965EDD-2.5#TRPBF datasheet, LT1965EDD-2.5#TRPBF pinout, LT1965EDD-2.5#TRPBF application, or LT1965EDD-2.5#TRPBF equivalent, key selection criteria include guaranteed 2.5V ±1.5% output accuracy over temperature and load, stability with 10µF ceramic output capacitors, reverse-battery protection, and thermally enhanced DFN packaging for high-power-density designs.
Technical Context
The LT1965EDD-2.5#TRPBF employs a precision bandgap reference and error amplifier to regulate output voltage via SENSE pin feedback, enabling Kelvin sensing for improved load regulation. Its internal PNP pass transistor architecture enables low dropout while maintaining controlled quiescent current across input/output differentials down to 310mV.
It integrates reverse-battery protection, foldback current limiting, thermal shutdown, and reverse-current blocking - eliminating external diodes. The SENSE pin (Pin 3) connects directly to OUT for standard operation or to the remote load for millivolt-level regulation accuracy under PCB trace resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±1.5% (2.425V–2.575V) over full load and temperature range - ensures stable logic rail for 2.5V FPGA I/O or analog subsystems. |
| Max Output Current | 1.1A continuous - supports high-current digital loads without external current boosting. |
| Dropout Voltage | 310mV typical at 1.1A - allows operation from 2.81V input, enabling efficient use of single-cell Li-ion or 3.3V pre-regulated rails. |
| Output Noise | 40µVRMS (10Hz–100kHz) - meets stringent RF/ADC supply requirements without additional LC filtering. |
| Quiescent Current | 600µA typical (active), <1µA in shutdown - extends battery life in portable instrumentation with periodic wake-up cycles. |
| Stability | Stable with ≥10µF ceramic or tantalum output capacitor - reduces BOM count and board space vs. traditional LDOs requiring electrolytics. |
| Protection Features | Reverse-battery, reverse-current, thermal limit, and foldback current limiting - eliminates need for external protection diodes or fuses. |
Pinout & Package
LT1965EDD-2.5#TRPBF uses an 8-lead 3mm × 3mm plastic DFN package with exposed thermal pad (Pin 9) soldered to PCB ground for optimal thermal performance (θJA = 65°C/W, θJC = 3°C/W). The package is rated for –40°C to +125°C junction temperature.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | OUT | Regulated 2.5V power output; dual pins reduce IR drop and improve current handling. |
| 3 | SENSE | Error amplifier input; tied to OUT for standard regulation or to remote load for Kelvin sensing to cancel PCB trace resistance effects. |
| 4, 5 | GND | Power ground return; connects internally to exposed thermal pad (Pin 9) - must be soldered to PCB ground plane. |
| 6 | SHDN | Active-low shutdown control; <5.5µA input current; logic-compatible with 0V–20V swing; pull to VIN if unused. |
| 7, 8 | IN | Input supply (1.8V–20V); dual pins lower impedance path and improve transient response. |
| 9 | EXPOSED PAD | Thermal and electrical ground; mandatory connection to PCB ground for thermal reliability and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise regulation | 40µVRMS output noise enables clean power for RF transceivers and high-resolution ADCs without added filtering. |
| Kelvin SENSE capability | Pin 3 accepts remote sense point to maintain ±1.5% output accuracy at load despite PCB trace resistance up to 100mΩ. |
| Reverse-battery protection | Withstands –20V on IN pin with zero reverse current into OUT - protects downstream circuitry during battery insertion errors. |
| Controlled quiescent current in dropout | IQ remains stable at ~600µA even as VIN approaches VOUT - avoids current surge and thermal runaway common in competing LDOs. |
| Thermally enhanced DFN | Exposed pad and low θJC = 3°C/W enable 1.1A operation at ambient up to +85°C without heatsink in standard 2-layer PCB layouts. |
Applications
| RF Power Supply Filtering | Post-Regulation for Switching Supplies |
|---|---|
|
Use Scenario: Providing ultra-low-noise bias to RF power amplifiers and mixer stages in cellular base station transceivers. IC Role / Device Role / Timing Role: Final-stage LDO delivering clean 2.5V rail isolated from switching noise generated by upstream DC/DC converters. Use Value: 40µVRMS noise floor prevents reciprocal mixing and maintains EVM <2.5% in LTE-Advanced 256-QAM transmission. |
Use Scenario: Tightening output voltage tolerance and reducing ripple on 3.3V buck converter outputs powering FPGA core logic. IC Role / Device Role / Timing Role: Precision post-regulator correcting ±3% buck output variation and attenuating 10mVP-P 500kHz switching ripple. Use Value: Enables reliable FPGA configuration at 2.5V with <±1.5% regulation margin, eliminating timing violations due to supply droop. |
| Portable Instrumentation Power | Industrial Sensor Signal Chain |
|
Use Scenario: Battery-powered handheld multimeter requiring stable 2.5V reference for 24-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Low-quiescent, shutdown-capable LDO supplying ADC reference and analog front-end from single Li-ion cell. Use Value: <1µA shutdown current extends battery life to >12 months in sleep mode; 600µA active IQ minimizes self-heating-induced offset drift. |
Use Scenario: Isolated 4–20mA transmitter module needing precise 2.5V excitation for RTD bridge and DAC reference. IC Role / Device Role / Timing Role: High-accuracy, reverse-protected LDO powering sensor interface ICs in harsh industrial environments. Use Value: Reverse-battery and reverse-current protection prevent field failure during wiring errors; ±1.5% output tolerance ensures <0.1% measurement uncertainty. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A4700RGWR | 2.5V fixed, 1A, 4.5µVRMS noise, 1.15V–6.5V input, 20µF min ceramic cap required | Lower noise but lower current rating; requires larger output capacitance for stability | Preferred when sub-5µVRMS noise is critical and load current ≤1A; not suitable for 1.1A peak loads. |
| MCP1703T-2502E/MB | 2.5V fixed, 250mA, 30µVRMS noise, 2.7V–16V input, stable with 1µF ceramic | Lower current, smaller package (SOT-23), no thermal pad, no reverse-battery protection | Only viable for low-power sensor nodes where 250mA suffices and reverse-voltage risk is mitigated externally. |
Compared with TPS7A4700RGWR and MCP1703T-2502E/MB, the LT1965EDD-2.5#TRPBF uniquely balances 1.1A delivery, 40µVRMS noise, reverse-battery protection, and DFN thermal performance - making it the only option supporting high-current, noise-sensitive, and field-deployed applications without design compromises.
Availability
LT1965EDD-2.5#TRPBF is available at Aetrix Electronics and suitable for RF transceiver power supplies, FPGA I/O rail conditioning, and portable instrumentation requiring stable component supply with full industrial temperature support (–40°C to +125°C).
Supply support for LT1965EDD-2.5#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 acquired Linear Technology in 2017 and maintains its legacy of high-performance analog ICs, particularly in power management and signal conditioning for demanding industrial and communications applications.
The LT1965 series was designed specifically for noise-critical, high-current linear regulation in RF infrastructure, test equipment, and portable instrumentation - emphasizing low dropout, ultra-low noise, and robust fault protection without external components.
FAQ
What is the guaranteed output voltage tolerance for LT1965EDD-2.5#TRPBF across temperature and load?
The LT1965EDD-2.5#TRPBF guarantees 2.5V output within ±1.5% (2.425V to 2.575V) over the full operating junction temperature range (–40°C to +125°C) and load current (1mA to 1.1A), as specified in the Electrical Characteristics table under "Regulated Output Voltage" for LT1965-2.5.
Can LT1965EDD-2.5#TRPBF operate with a 2.7V input supply?
No - the minimum input voltage for LT1965EDD-2.5#TRPBF is 3.5V at 1.1A load (per Electrical Characteristics table), due to its 310mV typical dropout plus margin. At 2.7V input, the device cannot regulate 2.5V and will enter dropout, causing uncontrolled output sag. Use only with VIN ≥3.5V for full-load operation.
Does LT1965EDD-2.5#TRPBF require an input bypass capacitor?
Yes - an input bypass capacitor (1µF–10µF ceramic) is recommended if the LT1965EDD-2.5#TRPBF is located more than six inches from the main input filter capacitor or in battery-powered systems, where rising battery impedance at high frequency can destabilize regulation. This is explicitly stated in the Pin Functions section.
How is thermal performance affected if the exposed pad of LT1965EDD-2.5#TRPBF is not soldered to PCB ground?
Failure to solder the exposed pad (Pin 9) to PCB ground severely degrades thermal performance: θJA increases from 65°C/W to >120°C/W, causing junction temperature to exceed 150°C at 1.1A load - triggering thermal shutdown and potential reliability failure. The datasheet mandates soldering this pad to ground for safe operation.
Is LT1965EDD-2.5#TRPBF compatible with ceramic output capacitors?
Yes - the LT1965EDD-2.5#TRPBF is explicitly characterized and guaranteed stable with ≥10µF ceramic (or tantalum) output capacitors, eliminating the need for aluminum electrolytics. This is confirmed in both the Features list and Electrical Characteristics section under "Stable with Ceramic or Tantalum Capacitors."
LT1965EDD-2.5#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 20V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.49V @ 1.1A
- Current - Output:
- 1.1A
- Current - Quiescent (Iq):
- 1.1 mA
- Current - Supply (Max):
- 40 mA
- PSRR:
- 75dB (120Hz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x3)
LT1965EDD-2.5#TRPBF FAQ
1.How can I place an order for LT1965EDD-2.5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1965EDD-2.5#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 LT1965EDD-2.5#TRPBF reliable?
The price and inventory of LT1965EDD-2.5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1965EDD-2.5#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1965EDD-2.5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1965EDD-2.5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1965EDD-2.5#TRPBF?
LT1965EDD-2.5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1965EDD-2.5#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 LT1965EDD-2.5#TRPBF?
For technical support, including LT1965EDD-2.5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1965EDD-2.5#TRPBF requirements.
6.How does Aetrix verify that LT1965EDD-2.5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1965EDD-2.5#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 LT1965EDD-2.5#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1965EDD-2.5#TRPBF?
All LT1965EDD-2.5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1965EDD-2.5#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 LT1965EDD-2.5#TRPBF part is unused and in its original packaging.
Return procedure for LT1965EDD-2.5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT1965EDD-2.5#TRPBF 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…
