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Texas Instruments LP38692MP-2.5/NOPB
- Part No.:
- LP38692MP-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-261-5, TO-261AB
- Datasheet:
-
LP38692MP-2.5/NOPB.pdf
- Description:
- IC REG LINEAR 2.5V 1A SOT223-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,940
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Product details
Overview
LP38692MP-2.5/NOPB from Texas Instruments is a 1-A, 2.5-V fixed-output low-dropout CMOS linear regulator in SOT-223 package, featuring 450 mV dropout at 1 A (5 VOUT), ±2.5% output accuracy over –40°C to 125°C, and enable-controlled ON/OFF operation - used for powering core logic in notebook computers and portable instrumentation.
For engineers reviewing the LP38692MP-2.5/NOPB datasheet, LP38692MP-2.5/NOPB pinout, LP38692MP-2.5/NOPB application, or LP38692MP-2.5/NOPB equivalent, key selection criteria include dropout voltage at full load, thermal performance in constrained PCB layouts, EN pin logic thresholds across temperature, ground current stability under varying load, and compatibility with 1-µF ceramic output capacitors.
Technical Context
The LP38692MP-2.5/NOPB uses a PMOS pass transistor enabling ultra-low ground pin current (55 µA typical at full load) independent of input voltage or temperature. Its internal trimmed bandgap reference and error amplifier deliver tight DC regulation and fast transient response without requiring external compensation.
Enable functionality is implemented via a dedicated EN pin with no internal pull-up/down; activation requires VEN ≥ 1.8 V (min) at VIN = 4 V, and shutdown occurs below 0.4 V. Foldback current limiting responds dynamically to VIN–VOUT differential: limits to ~450 mA when ΔV > 5 V, and ~1500 mA when ΔV < 4 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±2.5% at 25°C; maintains regulation across –40°C to 125°C junction range. |
| Max Output Current | 1 A continuous; limited by thermal design and foldback behavior under high VIN–VOUT differentials. |
| Dropout Voltage | 450 mV typical at 1 A and VOUT = 5 V; for LP38692MP-2.5/NOPB, measured as 800 mV max at 1 A and VOUT = 2.5 V over full temperature range. |
| Quiescent Current | 55 µA typical at full load; remains ≤100 µA across –40°C to 125°C and 100 µA–1 A load range. |
| Enable Threshold | VEN(ON) ≥ 1.8 V (min) at VIN = 4 V; VEN(OFF) ≤ 0.4 V (max); no hysteresis, requires clean logic transitions. |
| Thermal Shutdown | Activates at TJ ≈ 160°C; hysteresis ≈ 10°C; protects against sustained overload but not intended as primary thermal management. |
| Stability | Stable with ≥1 µF ceramic output capacitor; no ESR requirement; supports ultra-low-ESR MLCCs. |
Pinout & Package
SOT-223 (NDC) 5-pin thermally enhanced package: 6.50 mm × 3.56 mm body, exposed thermal pad on bottom, rated for 68.5°C/W junction-to-ambient (high-K board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input supply connection | Accepts 2.7 V to 10 V; must be decoupled with ≥1 µF ceramic capacitor near pin. |
| 2 (GND) | Circuit ground and thermal path | Internally connected to exposed pad; requires soldering to large copper plane for thermal performance. |
| 3 (OUT) | Regulated output | Delivers stable 2.5 V; connects directly to load and output capacitor. |
| 4 (SNS) | Output sense input | Not present on SOT-223; only available on WSON package - omitted for LP38692MP-2.5/NOPB. |
| 5 (EN) | Enable control input | Active-high logic; drives regulator ON when ≥1.8 V (min), OFF when ≤0.4 V (max); no internal bias. |
Key Features
| Feature | Design Value |
|---|---|
| PMOS Pass Transistor | Eliminates base drive current, keeping ground pin current ≤100 µA regardless of load, input, or temperature. |
| Ultra-Low Dropout | 450 mV typical at 1 A (5 VOUT); enables operation from single-cell Li-ion or 3.3 V rails with margin. |
| 1-µF Ceramic Stability | Eliminates need for tantalum or aluminum electrolytic capacitors - reduces BOM cost and footprint. |
| Wide Temp Range Spec | All electrical parameters guaranteed from –40°C to 125°C junction, supporting industrial and automotive under-hood applications. |
| Enable-Controlled Power Gating | Reduces quiescent current to ≤1 µA in shutdown, critical for battery runtime in portable systems. |
Applications
| Hard Disk Drive Power Rail | Notebook CPU Core Supply |
|---|---|
Use Scenario: Powers 2.5-V servo controller IC and interface logic in 2.5-inch HDDs with tight space constraints and thermal limits. IC Role / Device Role / Timing Role: Primary LDO delivering clean, regulated 2.5 V to timing-critical motor control circuitry. Use Value: Low dropout and 55 µA ground current minimize power loss and heat generation inside sealed drive enclosures. | Use Scenario: Supplies 2.5-V I/O or auxiliary core rail in ultraportable notebooks where battery life and thermal headroom are critical. IC Role / Device Role / Timing Role: Standby/always-on LDO enabling fast wake-from-sleep via EN pin control. Use Value: 1-µA shutdown current extends battery standby time; 1-µF ceramic compatibility simplifies layout in dense motherboard regions. |
| Portable Medical Instrumentation | Industrial Sensor Signal Chain |
Use Scenario: Powers ADC reference buffers and low-noise op-amps in handheld diagnostic devices operating from single Li-ion cells. IC Role / Device Role / Timing Role: Precision analog supply LDO ensuring stable 2.5-V reference for 12-bit+ data converters. Use Value: ±2.5% output accuracy and 0.7 µV/√Hz output noise preserve signal integrity in sub-mV measurement paths. | Use Scenario: Regulates power for isolated RS-485 transceivers and sensor front-ends in factory automation nodes. IC Role / Device Role / Timing Role: Robust local supply with thermal shutdown and foldback protection against field wiring faults. Use Value: 160°C thermal shutdown and VIN–VOUT-dependent current limiting prevent damage during cable short events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLS820B0LDV50 | Automotive-grade AEC-Q100 qualified; higher IQ (35 µA typ); fixed 5.0 V output; integrated watchdog timer. | Designed for automotive body electronics; lacks EN pin; not pin-compatible. | Select only if automotive qualification and 5 V output are required; not drop-in for LP38692MP-2.5/NOPB. |
| MCP1826T-2502E/DB | 2.5 V fixed output; 1 A rating; SOT-223; 600 mV dropout (typ) at 1 A; 80 µA IQ (typ); no EN pin. | Lower cost general-purpose LDO; no enable function; slightly higher dropout and quiescent current. | Use where enable control is unnecessary and thermal margin allows higher dropout; verify stability with 1 µF ceramic. |
Compared with TLS820B0LDV50 and MCP1826T-2502E/DB, LP38692MP-2.5/NOPB uniquely combines 2.5 V fixed output, active enable control, ultra-low ground current, and guaranteed 1-A operation in SOT-223 - making it optimal for portable, thermally constrained, and power-gated systems.
Availability
LP38692MP-2.5/NOPB is available at Aetrix Electronics and suitable for notebook computers, portable instrumentation, and hard disk drive power rails requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LP38692MP-2.5/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 ICs, embedded processors, and system solutions for industrial, automotive, and personal electronics markets.
The LP38692MP-2.5/NOPB belongs to TI's precision low-dropout linear regulator product line, engineered for battery-powered and thermally sensitive applications demanding high accuracy, low quiescent current, and ceramic-capacitor stability.
FAQ
What is the minimum input voltage required for LP38692MP-2.5/NOPB to regulate 2.5 V output?
The LP38692MP-2.5/NOPB requires VIN ≥ (VOUT + VDO). At 1 A load and 25°C, dropout is 800 mV typical, so minimum VIN is ~3.3 V. Over temperature and process, max dropout reaches 1300 mV, requiring VIN ≥ 3.8 V for guaranteed regulation. Absolute minimum operating VIN is 2.7 V, but regulation only begins once VIN exceeds VOUT + VDO.
Does LP38692MP-2.5/NOPB require an external resistor divider to set output voltage?
No. LP38692MP-2.5/NOPB is a fixed-output device with internally trimmed 2.5 V regulation. It contains no feedback pins or external resistor connections - the output voltage is factory-set and non-adjustable. This eliminates layout complexity and ensures consistent accuracy without external component tolerance effects.
Can LP38692MP-2.5/NOPB operate with a 1-µF ceramic output capacitor?
Yes. LP38692MP-2.5/NOPB is explicitly designed and tested for stability with ≥1 µF ceramic output capacitors, including X5R/X7R MLCCs. No ESR requirement applies, unlike older LDOs. This enables smaller, lower-cost, and more reliable designs versus tantalum or aluminum electrolytic alternatives.
What happens to LP38692MP-2.5/NOPB when the EN pin is left floating?
The EN pin has no internal pull-up or pull-down. If left floating, its voltage is undefined and susceptible to noise, potentially causing erratic ON/OFF behavior or partial enable states. TI specifies that EN must be actively driven or terminated - e.g., tied to IN for always-on operation or pulled to GND via resistor for default-off. Floating EN violates recommended operating conditions.
Is LP38692MP-2.5/NOPB compatible with lead-free reflow processes?
Yes. LP38692MP-2.5/NOPB carries the /NOPB suffix, indicating lead-free (Pb-free) and RoHS-compliant packaging. The SOT-223 package is rated for standard Pb-free reflow profiles per JEDEC J-STD-020, with peak temperature up to 260°C for 10 seconds. Thermal pad soldering is required for proper thermal performance and reliability.
LP38692MP-2.5/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-261-5, TO-261AB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 10V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.3V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 55 µA
- Current - Supply (Max):
- 100 µA
- PSRR:
- 55dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-5
LP38692MP-2.5/NOPB FAQ
1.How can I place an order for LP38692MP-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP38692MP-2.5/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 LP38692MP-2.5/NOPB reliable?
The price and inventory of LP38692MP-2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP38692MP-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LP38692MP-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP38692MP-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP38692MP-2.5/NOPB?
LP38692MP-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP38692MP-2.5/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 LP38692MP-2.5/NOPB?
For technical support, including LP38692MP-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP38692MP-2.5/NOPB requirements.
6.How does Aetrix verify that LP38692MP-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LP38692MP-2.5/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 LP38692MP-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LP38692MP-2.5/NOPB?
All LP38692MP-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP38692MP-2.5/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 LP38692MP-2.5/NOPB part is unused and in its original packaging.
Return procedure for LP38692MP-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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