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Texas Instruments LP8340IDT-5.0/NOPB
- Part No.:
- LP8340IDT-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
LP8340IDT-5.0/NOPB.pdf
- Description:
- IC REG LINEAR 5V 1A TO252-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,899
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Product details
Overview
LP8340IDT-5.0/NOPB from Texas Instruments is a fixed-output 5.0V, 1.0A low-dropout CMOS linear regulator with ±1.5% output voltage tolerance, 420mV typical dropout at 1.0A, 19µA typical quiescent current, and thermal overload/foldback current limiting - deployed in hard disk drives and notebook computers for stable local power regulation.
For engineers reviewing the LP8340IDT-5.0/NOPB datasheet, LP8340IDT-5.0/NOPB pinout, LP8340IDT-5.0/NOPB application, or LP8340IDT-5.0/NOPB equivalent, key selection criteria include dropout performance at full load, ultra-low IQ for battery-sensitive systems, WSON-6 thermal capability, and fixed 5.0V output accuracy across −40°C to 125°C.
Technical Context
The LP8340IDT-5.0/NOPB integrates a zener-trimmed 1.25V bandgap reference, high-gain error amplifier, and PMOS pass transistor - enabling precise closed-loop regulation without base-drive current. Its architecture eliminates PNP-type ground current dependency, maintaining <50µA total ground current across temperature, input voltage, and load.
It features foldback current limiting (1600mA limit at VIN−VOUT <4V), thermal shutdown at 160°C with 10°C hysteresis, and ripple rejection of 48–55dB at 120Hz - all implemented within a monolithic CMOS process optimized for low-noise, low-IQ operation in space-constrained applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±1.5% over −40°C to 125°C - ensures compatibility with 5V logic and analog subsystems without external feedback. |
| Max Output Current | 1.0A continuous - supports high-current digital loads such as microcontroller cores or interface ICs in portable systems. |
| Dropout Voltage | 420mV typical at 1.0A (VIN ≥6V) - enables regulation from 5.42V input, critical for single-cell Li+ or buck-boost pre-regulator outputs. |
| Quiescent Current | 19µA typical (≤50µA max) - minimizes standby power loss in always-on circuits like real-time clocks or wake-up supervisors. |
| Input Voltage Range | 2.7V to 10V - accommodates wide-input industrial supplies and battery-derived rails while maintaining regulation. |
| Thermal Shutdown | 160°C junction temperature with 10°C hysteresis - provides robust protection during sustained overload or poor PCB heatsinking. |
| Output Noise | 250µVRMS (10Hz–10kHz) - suitable for noise-sensitive analog circuitry including ADC references and sensor signal chains. |
Pinout & Package
LP8340IDT-5.0/NOPB uses the 6-pin WSON package (NGD0006A), 2.0mm × 2.0mm × 0.75mm body, exposed thermal pad (GND-connected), moisture sensitivity level 3 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1 & 6) | Input power supply connection | Must be externally shorted for full 1.0A operation (500mA per pin rating); connects to input capacitor and upstream supply. |
| GND (Pin 2) | Power and signal reference ground | Primary ground return; ties to exposed thermal pad for enhanced thermal dissipation and low-impedance reference path. |
| N/C (Pin 3) | No-connect terminal | Internally unconnected; must remain floating - no external connection permitted. |
| VOUT (Pin 4) | Regulated output voltage node | Delivers 5.0V to load; requires ≥1µF ceramic output capacitor placed adjacent to pin for stability and transient response. |
| VOUT Sense (Pin 5) | Remote output voltage sensing | Must be connected directly to VOUT (Pin 4) for fixed-output operation; enables Kelvin-sense accuracy in high-current layouts. |
Key Features
| Feature | Design Value |
|---|---|
| PMOS Pass Transistor | Eliminates base-drive current, keeping ground current ≤50µA regardless of load - ideal for battery runtime optimization. |
| Low Dropout Architecture | 420mV @ 1.0A enables operation with minimal headroom, reducing power loss and heat generation in thermally constrained designs. |
| Zener-Trimmed Bandgap | ±1.5% output tolerance over full temperature range ensures reliable 5.0V rail compliance without post-production calibration. |
| Foldback Current Limit | Reduces output current under short-circuit conditions to limit power dissipation and prevent thermal runaway during fault events. |
| Thermal Overload Protection | Shuts down at 160°C with 10°C hysteresis, allowing safe recovery after cooling - protects both device and system-level components. |
Applications
| Hard Disk Drive Power Management | Notebook Computer Core Rail |
|---|---|
Use Scenario: Supplies 5V to spindle motor driver ICs and servo control circuitry in 2.5-inch HDDs with tight thermal envelopes. IC Role / Device Role / Timing Role: Primary LDO delivering regulated 5V from 7–9V buck converter output; maintains voltage stability during rapid load transients. Use Value: 420mV dropout allows efficient use of intermediate bus voltage; 250µVRMS noise prevents data corruption in high-speed read/write channels. |
Use Scenario: Powers USB controller, audio codec, and embedded controller in ultraportable notebooks operating on single-cell Li+ batteries. IC Role / Device Role / Timing Role: Local 5V regulator sourcing up to 1.0A from boosted battery rail; supports dynamic load steps during peripheral enumeration. Use Value: 19µA quiescent current extends battery life in S3/S4 sleep states; WSON-6 footprint saves board area in dense motherboard layouts. |
| Battery-Powered Instrumentation | Industrial Sensor Node Power |
Use Scenario: Provides clean 5V bias to precision op-amps and SAR ADCs in handheld multimeters and calibrators. IC Role / Device Role / Timing Role: Low-noise analog supply regulator; decouples sensitive analog circuitry from noisy digital domains. Use Value: 250µVRMS output noise and 55dB ripple rejection ensure sub-LSB measurement accuracy in 16-bit+ systems. |
Use Scenario: Regulates 5V for wireless transceivers and microcontrollers in battery-operated IIoT nodes deployed in remote locations. IC Role / Device Role / Timing Role: Primary system power regulator operating across −40°C to 125°C ambient; handles cold-start and thermal cycling. Use Value: Guaranteed operation to 125°C junction and ±1.5% output tolerance maintain sensor calibration integrity and RF link stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A4700RGWR | Ultra-low noise (4.7µVRMS), lower IQ (1.2mA), but only 100mA output and higher dropout (300mV @ 100mA) | Targeted at ultra-precision analog rails, not high-current digital loads | Select when noise is paramount and load ≤100mA; avoid for 1.0A applications requiring LP8340IDT-5.0/NOPB's current capability. |
| MCP1703T-5002E/MB | 1.0A output, 600mV dropout @ 1.0A, 2.5µA IQ, but only rated to 125°C ambient (not junction), wider VIN (2.3–16V) | Optimized for ultra-low-power battery systems where dropout is less critical than IQ | Prefer for energy-harvesting or coin-cell applications needing sub-µA IQ; LP8340IDT-5.0/NOPB better suits thermally demanding 1.0A loads. |
Compared with TPS7A4700RGWR and MCP1703T-5002E/MB, LP8340IDT-5.0/NOPB uniquely balances 1.0A output, 420mV dropout, 19µA IQ, and 125°C junction rating - making it the only option among the three qualified for high-current, low-headroom, wide-temperature industrial LDO use cases.
Availability
LP8340IDT-5.0/NOPB is available at Aetrix Electronics and suitable for hard disk drives, notebook computers, and battery-powered instrumentation requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.
Supply support for LP8340IDT-5.0/NOPB 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
Texas Instruments is a global semiconductor company designing analog, embedded processing, and connectivity technologies for industrial, automotive, and personal electronics markets.
The LP8340 product line delivers low-IQ, low-dropout linear regulators targeting space-constrained, thermally sensitive applications where efficiency, precision, and reliability are critical - especially in portable and storage systems.
FAQ
What is the maximum junction temperature and thermal shutdown behavior of the LP8340IDT-5.0/NOPB?
The LP8340IDT-5.0/NOPB features thermal shutdown at 160°C junction temperature with 10°C hysteresis. Once triggered, the device disables the PMOS pass transistor until junction temperature falls below 150°C, then resumes regulation. This protects against sustained overload or inadequate PCB heatsinking. The absolute maximum junction temperature is 150°C per datasheet ratings, but thermal shutdown activates before reaching that limit to ensure safe operation.
Can the LP8340IDT-5.0/NOPB operate with input voltages below 2.7V?
No - the LP8340IDT-5.0/NOPB has a minimum specified input voltage of 2.7V per its operating ratings. Below this, regulation is not guaranteed, dropout behavior becomes undefined, and output voltage may fall out of specification. The device will not function reliably at 2.5V or lower inputs, even if the 5.0V output appears stable under light load.
Is an external output capacitor required for stability with the LP8340IDT-5.0/NOPB?
Yes - the LP8340IDT-5.0/NOPB requires a minimum 1.0µF ceramic (X7R) output capacitor connected between VOUT (Pin 4) and GND. This capacitor ensures loop stability, improves load-transient response, and reduces output noise. Larger values (up to 10µF) are recommended for improved performance, but values below 1.0µF risk oscillation or poor regulation.
What is the purpose of Pin 5 (VOUT Sense) on the LP8340IDT-5.0/NOPB?
Pin 5 (VOUT Sense) enables remote sensing of the output voltage at the load to compensate for IR drop in PCB traces. For fixed-output LP8340IDT-5.0/NOPB operation, it must be connected directly to Pin 4 (VOUT) - this configuration ensures accurate regulation at the IC's output pin. Leaving it unconnected violates the datasheet requirement and may cause output inaccuracy or instability.
Does the LP8340IDT-5.0/NOPB support adjustable output voltage configurations?
No - the LP8340IDT-5.0/NOPB is a fixed 5.0V output variant. Adjustable versions (e.g., LP8340ILDX-ADJ/NOPB) use different part numbers and internal topology, with ADJ and VOUT Sense pins configured for external resistor feedback. The LP8340IDT-5.0/NOPB has internal feedback resistors and no ADJ pin; attempting to modify its output voltage is not supported and will result in incorrect operation.
LP8340IDT-5.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Tube
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 10V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.8V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 100 µA
- Current - Supply (Max):
- 170 µA
- PSRR:
- 55dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-252-3
LP8340IDT-5.0/NOPB FAQ
1.How can I place an order for LP8340IDT-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP8340IDT-5.0/NOPB 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 LP8340IDT-5.0/NOPB reliable?
The price and inventory of LP8340IDT-5.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP8340IDT-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LP8340IDT-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP8340IDT-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP8340IDT-5.0/NOPB?
LP8340IDT-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP8340IDT-5.0/NOPB 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 LP8340IDT-5.0/NOPB?
For technical support, including LP8340IDT-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP8340IDT-5.0/NOPB requirements.
6.How does Aetrix verify that LP8340IDT-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LP8340IDT-5.0/NOPB 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 LP8340IDT-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LP8340IDT-5.0/NOPB?
All LP8340IDT-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP8340IDT-5.0/NOPB, 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 LP8340IDT-5.0/NOPB part is unused and in its original packaging.
Return procedure for LP8340IDT-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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