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Analog Devices Inc. LT1963EFE-1.5#PBF
- Part No.:
- LT1963EFE-1.5#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LT1963EFE-1.5#PBF.pdf
- Description:
- IC REG LINEAR 1.5V 1.5A 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:190
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Product details
Overview
LT1963EFE-1.5#PBF from Analog Devices (formerly Linear Technology) is a 1.5A, low-noise, fast-transient-response LDO regulator with fixed 1.5V output, 340mV dropout at 1.5A, 40µVRMS output noise (10Hz–100kHz), and stable operation with only 10µF output capacitance. It serves as a post-regulator for switching supplies or logic power supply in RF-sensitive applications such as cellular baseband processors and PLL power rails.
For engineers reviewing the LT1963EFE-1.5#PBF datasheet, LT1963EFE-1.5#PBF pinout, LT1963EFE-1.5#PBF application, or LT1963EFE-1.5#PBF equivalent, key selection criteria include guaranteed dropout voltage ≤450mV at 1.5A, shutdown quiescent current <1µA, reverse battery protection, no external diode requirement, and compatibility with ceramic output capacitors down to 10µF.
Technical Context
The LT1963EFE-1.5#PBF employs a PNP pass transistor architecture optimized for fast load transient response-critical for powering digital cores with burst-mode current demands. Its Kelvin-sense SENSE pin enables precision regulation at the load point, eliminating PC trace IR drop errors.
It integrates reverse battery protection, thermal limiting, current limiting, and reverse output current blocking (≤1.2mA). Quiescent current remains tightly controlled across dropout-unlike conventional LDOs-and drops to <1µA in shutdown via the SHDN pin, supporting battery longevity in portable systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.500V ±2.3% (1.477V–1.523V) at 1mA; ±3.0% over full load/temperature range-ensures stable core voltage for 1.5V logic families. |
| Max Output Current | 1.5A continuous-supports high-current FPGA I/O banks or multi-core SoC subsystems without derating. |
| Dropout Voltage | 340mV typical at 1.5A (max 550mV)-enables operation from 2.05V input when delivering 1.5V/1.5A, minimizing power loss. |
| Output Noise | 40µVRMS (10Hz–100kHz)-low enough for RF transceiver VCO/PLL supply without added filtering. |
| Quiescent Current | 1.0mA typical operating / <1µA in shutdown-extends battery life in always-on sensor nodes and standby modes. |
| Stability | Stable with ≥10µF output capacitor (ESR 50mΩ–3Ω)-allows use of low-ESR ceramic caps without external compensation. |
| Protection | Reverse battery protection, reverse output current blocking (≤1.2mA), thermal shutdown, and current limit (≥1.6A)-eliminates need for external protection diodes or FETs. |
Pinout & Package
LT1963EFE-1.5#PBF uses the 16-lead TSSOP package with exposed pad (pin 17 = GND), offering θJA = 38°C/W for high-power-density PCB layouts. The exposed pad must be soldered to PCB ground plane for rated thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 7, 8, 10, 11, 12, 14, 15, 16 | GND | Twelve dedicated ground terminals-including exposed pad (pin 17)-provide low-impedance return path and enhanced thermal conduction. |
| 5 | SENSE | Kelvin sense input for fixed-output versions; connects directly to OUT for standard operation or to load point for precision regulation. |
| 6 | OUT | Main regulated 1.5V output; requires ≥10µF output capacitor; capable of sourcing 1.5A with <1.5mV load regulation error. |
| 9 | IN | Input supply pin; withstands ±20V differential to GND/OUT; reverse-battery protected-no external diode needed. |
| 13 | SHDN | Active-low shutdown control; <1µA leakage when pulled low; compatible with 3.3V/5V logic; must tie to IN if unused. |
Key Features
| Feature | Design Value |
|---|---|
| Fast transient response | Sub-100µs recovery from 1A step load change-minimizes voltage droop during CPU burst activity. |
| No external protection diodes | Integrated reverse battery and reverse output current blocking-reduces BOM count and board area by eliminating discrete diodes. |
| Controlled quiescent current in dropout | IQ remains ~1mA even when VIN approaches VOUT-prevents thermal runaway and maintains predictable power budget. |
| Low-noise RF supply capability | 40µVRMS noise + 63dB ripple rejection at 120Hz-meets stringent spectral purity requirements for RF front-end biasing. |
| Wide input voltage range | Operates with VIN as low as 1.9V (at 0.5A) up to 20V-supports single-cell Li-ion (2.7–4.2V) and industrial 12V rail inputs. |
Applications
| Cellular Baseband Power | Post-Regulation for DC/DC Converters |
|---|---|
|
Use Scenario: Powering ARM-based baseband processors requiring clean 1.5V core voltage with rapid current transients during data transmission bursts. IC Role / Device Role / Timing Role: Primary low-noise LDO supplying processor core domain; SENSE pin connected at CPU VDD pin for Kelvin regulation. Use Value: 40µVRMS noise prevents bit errors in high-speed serial interfaces; 340mV dropout enables >90% efficiency from 2.5V intermediate rail. |
Use Scenario: Tight-regulation stage after a 3.3V buck converter feeding sensitive analog circuitry (e.g., ADC reference buffers). IC Role / Device Role / Timing Role: Precision post-regulator rejecting switching ripple; operates with 10µF ceramic output cap for compact layout. Use Value: 63dB ripple rejection at 120Hz suppresses buck converter residual ripple; load regulation ≤9mV ensures stable reference voltage. |
| FPGA I/O Bank Supply | Battery-Powered Medical Sensors |
|
Use Scenario: Delivering 1.5V to FPGA I/O banks with dynamic current draw up to 1.2A during high-speed interface activation (e.g., PCIe, DDR). IC Role / Device Role / Timing Role: High-current LDO with fast transient response; uses multiple GND pins and exposed pad for thermal management. Use Value: 1.5A rating and sub-100µs transient recovery prevent I/O timing violations; reverse current blocking protects battery during hot-swap events. |
Use Scenario: Long-life wearable ECG sensor powered by coin cell (3V), requiring ultra-low IQ and shutdown capability between measurements. IC Role / Device Role / Timing Role: Primary power regulator with <1µA shutdown current; reverse battery protection guards against incorrect battery insertion. Use Value: <1µA shutdown IQ extends 3V coin cell life to >5 years in intermittent-use mode; 1.5V output matches low-voltage op-amp and ADC requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A4700RGWR | 20V input, 1A output, 4µVRMS noise (10Hz–100kHz), adjustable only; requires ≥22µF output cap. | Lacks fixed 1.5V option and reverse battery protection; higher PSRR but lower current rating. | Select when ultra-low noise (<5µVRMS) is prioritized over current capacity and reverse protection. |
| MCP1703T-1502E/MB | 200mA max output, 600mV dropout at 250mA, 30µVRMS noise, SOT-23 package; no SENSE pin or reverse protection. | Not suitable for 1.5A loads; limited thermal capability; lacks Kelvin sensing and battery-reverse hardening. | Choose only for space-constrained, low-current (<200mA) applications where cost is critical and protection features are handled externally. |
Compared with TPS7A4700RGWR and MCP1703T-1502E/MB, the LT1963EFE-1.5#PBF uniquely delivers 1.5A output with integrated reverse battery protection, Kelvin sensing, and guaranteed stability on 10µF ceramics-making it the only viable choice for high-current, safety-critical, or RF-sensitive 1.5V rail generation.
Availability
LT1963EFE-1.5#PBF is available at Aetrix Electronics and suitable for cellular baseband power, FPGA I/O bank supply, and battery-powered medical sensors requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LT1963EFE-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 acquired Linear Technology in 2017 and maintains full product support, documentation, and manufacturing continuity for the LT1963 series.
The LT1963 series was designed specifically for high-current, low-noise, fast-transient LDO applications in RF infrastructure, portable instrumentation, and battery-powered systems demanding robust protection and minimal external components.
FAQ
What is the minimum input voltage required for LT1963EFE-1.5#PBF to deliver 1.5A output current?
The LT1963EFE-1.5#PBF requires a minimum input voltage of 2.5V to sustain 1.5A output current while maintaining regulation. This is derived from the 340mV typical dropout voltage plus the 1.5V nominal output, with margin for worst-case variation (up to 550mV dropout). Below 2.5V input, output voltage will collapse into dropout.
Does LT1963EFE-1.5#PBF require an external diode for reverse battery protection?
No, the LT1963EFE-1.5#PBF includes integrated reverse battery protection. When the IN pin is driven negative relative to GND (e.g., reversed battery insertion), the device blocks reverse current flow and prevents damage to itself or downstream circuitry-no external diode is needed.
Can LT1963EFE-1.5#PBF operate stably with ceramic output capacitors?
Yes, the LT1963EFE-1.5#PBF is explicitly characterized for stability with ceramic output capacitors ≥10µF and ESR between 50mΩ and 3Ω. X5R or X7R dielectrics are recommended; Y5V/Z5U types should be avoided due to excessive DC bias and temperature drift.
What is the function of the SENSE pin on LT1963EFE-1.5#PBF?
The SENSE pin on LT1963EFE-1.5#PBF provides Kelvin feedback for precision regulation. When connected directly to the OUT pin, it enables standard operation. When routed to the load point (e.g., CPU VDD pin), it compensates for PC trace resistance, ensuring accurate 1.5V delivery despite IR drop.
How does LT1963EFE-1.5#PBF behave during shutdown?
When the SHDN pin is pulled low, the LT1963EFE-1.5#PBF disables its pass transistor, reducing quiescent current to <1µA (typical). The output is actively discharged through an internal path, ensuring rapid and controlled voltage decay-critical for sequencing in multi-rail systems.
LT1963EFE-1.5#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 20V
- Voltage - Output (Min/Fixed):
- 1.5V
- 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:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP-EP
LT1963EFE-1.5#PBF FAQ
1.How can I place an order for LT1963EFE-1.5#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1963EFE-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 LT1963EFE-1.5#PBF reliable?
The price and inventory of LT1963EFE-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 LT1963EFE-1.5#PBF is usually 5 days.
3.What payment methods are accepted for LT1963EFE-1.5#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1963EFE-1.5#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1963EFE-1.5#PBF?
LT1963EFE-1.5#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1963EFE-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 LT1963EFE-1.5#PBF?
For technical support, including LT1963EFE-1.5#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1963EFE-1.5#PBF requirements.
6.How does Aetrix verify that LT1963EFE-1.5#PBF is sourced from the original manufacturer or authorized distributors?
All LT1963EFE-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 LT1963EFE-1.5#PBF meets industry standards.
7.What is the process for return or replacement of LT1963EFE-1.5#PBF?
All LT1963EFE-1.5#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1963EFE-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 LT1963EFE-1.5#PBF part is unused and in its original packaging.
Return procedure for LT1963EFE-1.5#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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