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Analog Devices Inc. LT1963AET-1.8#PBF
- Part No.:
- LT1963AET-1.8#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- TO-220-5
- Datasheet:
-
LT1963AET-1.8#PBF.pdf
- Description:
- IC REG LINEAR 1.8V 1.5A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,045
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Product details
Overview
LT1963AET-1.8#PBF from Analog Devices (formerly Linear Technology) is a 1.5A, low-noise, fast-transient-response LDO regulator in a 5-lead TO-220 package with fixed 1.8V output. It delivers 340mV dropout at full load, 40µVRMS output noise (10Hz–100kHz), and 1mA quiescent current-optimized for RF power supply and post-regulation of switching converters.
For engineers reviewing the LT1963AET-1.8#PBF datasheet, LT1963AET-1.8#PBF pinout, LT1963AET-1.8#PBF application, or LT1963AET-1.8#PBF equivalent, key selection criteria include guaranteed 1.8V ±2.7% output accuracy over –40°C to 125°C, stable operation with 10µF ceramic or tantalum output capacitors, reverse battery protection, and no external diodes required.
Technical Context
The LT1963AET-1.8#PBF uses a PNP pass transistor architecture enabling fast transient response without sacrificing stability. Its error amplifier features Kelvin-sense capability via the SENSE pin, allowing remote feedback to compensate for PCB trace resistance and maintain regulation at the load.
Internal protection includes thermal limiting, current limiting (1.6A min), reverse battery protection, and zero reverse current flow when VIN < VOUT. Quiescent current remains tightly controlled in dropout-unlike many LDOs-and drops to <1µA in shutdown mode via the SHDN pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±2.7% (1.747V–1.854V) across full temperature and load range |
| Max Output Current | 1.5A continuous-supports high-current digital logic rails and RF IC biasing |
| Dropout Voltage | 340mV at 1.5A-enables efficient 1.8V generation from 2.14V minimum input |
| Output Noise | 40µVRMS (10Hz–100kHz)-meets stringent RF supply requirements for LNAs and mixers |
| Quiescent Current | 1mA active, <1µA shutdown-extends battery life in portable systems |
| Stability | Stable with ≥10µF ceramic, tantalum, or aluminum electrolytic output capacitors |
| Protection | Reverse battery, reverse output current (≤600µA), thermal limit, current limit |
Pinout & Package
Package: 5-Lead Plastic TO-220 (T package), tab connected to GND, θJA = 50°C/W, TJMAX = 150°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: IN | Input voltage supply | Accepts 2.8V to 20V input; withstands –20V reverse input with no reverse current |
| 2: GND | Ground reference | Common return for IN, OUT, SENSE/ADJ, and SHDN; tab is electrically connected |
| 3: OUT | Regulated output | Delivers 1.8V at up to 1.5A; requires ≥10µF output capacitor for stability |
| 4: SENSE | Feedback sense node | Connected to OUT for standard operation; enables Kelvin sensing at load for improved regulation accuracy |
| 5: SHDN | Shutdown control | Active-low; pulls output off when ≤0.25V; requires pull-up if driven by open-collector logic |
Key Features
| Feature | Design Value |
|---|---|
| Fast transient response | Minimizes output voltage deviation during sudden load steps-critical for FPGA core supplies |
| No external protection diodes | Integrated reverse battery and reverse output protection eliminate BOM cost and board space |
| Controlled quiescent current in dropout | Prevents thermal runaway and maintains predictable power budget during brownout conditions |
| Stable with ceramic capacitors | Enables compact, low-ESR, high-reliability designs without tantalum or electrolytic constraints |
| Shutdown mode | Reduces total system current to sub-µA level-essential for always-on IoT sensor nodes |
Applications
| Baseband Processor Power | RF Transceiver Bias |
|---|---|
Use Scenario: Powering ARM-based baseband processors in cellular modems requiring clean, low-noise 1.8V core supply. IC Role / Device Role / Timing Role: Primary LDO delivering regulated 1.8V to processor core and I/O domains. Use Value: 40µVRMS noise ensures minimal clock jitter and ADC SNR degradation in mixed-signal SoCs. | Use Scenario: Supplying bias voltage to RF power amplifiers and low-noise amplifiers in 4G/5G front-end modules. IC Role / Device Role / Timing Role: Post-regulator cleaning ripple from DC-DC converters feeding RF signal chain. Use Value: Fast transient response suppresses supply-induced AM-to-PM distortion during burst transmission. |
| Industrial PLC I/O Module | Automotive Infotainment MCU |
Use Scenario: Providing isolated 1.8V rail for digital isolator interfaces and sensor interface ASICs in harsh industrial environments. IC Role / Device Role / Timing Role: Robust local regulator with reverse battery and thermal protection for field-side power domains. Use Value: Withstands –20V reverse input and operates continuously from –40°C to 125°C junction temperature. | Use Scenario: Powering infotainment application processors and display controllers in automotive head units. IC Role / Device Role / Timing Role: Fixed-output LDO supplying 1.8V to memory interfaces and GPU cores. Use Value: Guaranteed 1.8V accuracy over automotive temperature range eliminates need for external trimming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3080IM#PBF | Adjustable 1.1A LDO with current-source reference; higher dropout (≈1.2V at 1.1A); no fixed 1.8V option | Requires external resistor network for 1.8V; less suitable for space-constrained fixed-voltage designs | Choose when adjustable output or parallel-master configuration is needed |
| TPS7A4701RGWR | 1A ultra-low-noise (4µVRMS) LDO; lower max current; 1.8V fixed version available (TPS7A4701RGWT) | Lower noise but limited to 1A; not rated for 125°C operation; no reverse battery protection | Choose for ultra-sensitive analog circuits where 1A suffices and extended temperature is not required |
Compared with LT3080IM#PBF and TPS7A4701RGWR, the LT1963AET-1.8#PBF uniquely combines 1.5A output, 125°C operation, reverse battery protection, and fixed 1.8V in TO-220-making it optimal for high-reliability embedded power where simplicity and ruggedness are prioritized over ultra-low noise or adjustability.
Availability
LT1963AET-1.8#PBF is available at Aetrix Electronics and suitable for industrial automation, automotive infotainment, and RF communications equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant lead-free packaging.
Supply support for LT1963AET-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 acquired Linear Technology in 2017 and continues its legacy of precision analog and power management ICs for demanding applications.
The LT1963A series was designed specifically for high-current, low-noise, fast-transient LDO applications in RF, telecom, and industrial systems-emphasizing ruggedness, simplicity, and guaranteed performance across extreme temperatures.
FAQ
What is the minimum input voltage required for LT1963AET-1.8#PBF to regulate at full 1.5A load?
The LT1963AET-1.8#PBF requires a minimum input voltage of 2.14V at 1.5A load (1.8V + 340mV dropout). Per datasheet Figure 33, this value increases slightly at temperature extremes-up to 2.21V at –40°C and 125°C-ensuring reliable operation across the full industrial temperature range.
Does LT1963AET-1.8#PBF require external diodes for reverse polarity protection?
No. The LT1963AET-1.8#PBF integrates reverse battery protection: when VIN is reversed (e.g., –20V), no reverse current flows into the device or to the load, and the output remains safely off. This eliminates the need for external series diodes and their associated voltage drop and power loss.
Can LT1963AET-1.8#PBF be used with ceramic output capacitors?
Yes. The LT1963AET-1.8#PBF is explicitly characterized and guaranteed stable with ≥10µF ceramic, tantalum, or aluminum electrolytic output capacitors. No ESR requirements or damping networks are needed-simplifying layout and improving reliability in vibration-prone environments.
What is the shutdown current of LT1963AET-1.8#PBF, and how is the SHDN pin driven?
The LT1963AET-1.8#PBF draws <1µA in shutdown when VSHDN ≤ 0.25V. The SHDN pin accepts 5V logic or open-collector drivers with a pull-up resistor (≥100kΩ typical); if unused, it must be tied to VIN to ensure normal operation. SHDN pin current is ≤3µA when pulled high.
How accurate is the 1.8V output of LT1963AET-1.8#PBF over temperature and load?
The LT1963AET-1.8#PBF delivers 1.8V with ±2.7% initial accuracy (1.747V–1.854V) over –40°C to 125°C junction temperature and 1mA–1.5A load range. Load regulation is ≤10mV from 1mA to 1.5A at VIN = 2.8V, ensuring consistent voltage under dynamic operating conditions.
LT1963AET-1.8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- TO-220-5
- Packaging:
- Tube
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 20V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.55V @ 1.5A
- Current - Output:
- 1.5A
- Current - Quiescent (Iq):
- 1.5 mA
- Current - Supply (Max):
- 120 mA
- PSRR:
- 63dB (120Hz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-5
LT1963AET-1.8#PBF FAQ
1.How can I place an order for LT1963AET-1.8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1963AET-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 LT1963AET-1.8#PBF reliable?
The price and inventory of LT1963AET-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 LT1963AET-1.8#PBF is usually 5 days.
3.What payment methods are accepted for LT1963AET-1.8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1963AET-1.8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1963AET-1.8#PBF?
LT1963AET-1.8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1963AET-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 LT1963AET-1.8#PBF?
For technical support, including LT1963AET-1.8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1963AET-1.8#PBF requirements.
6.How does Aetrix verify that LT1963AET-1.8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1963AET-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 LT1963AET-1.8#PBF meets industry standards.
7.What is the process for return or replacement of LT1963AET-1.8#PBF?
All LT1963AET-1.8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1963AET-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 LT1963AET-1.8#PBF part is unused and in its original packaging.
Return procedure for LT1963AET-1.8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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