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Texas Instruments LP3962ES-2.5/NOPB
- Part No.:
- LP3962ES-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
LP3962ES-2.5/NOPB.pdf
- Description:
- IC REG LINEAR 2.5V 1.5A DDPAK
- Quantity:
- Payment:
- Shipping:
Inventory:395
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Product details
Overview
LP3962ES-2.5/NOPB from Texas Instruments is a fast ultra-low-dropout linear regulator delivering 1.5A DC output at fixed 2.5V, with 38mV typical dropout at 150mA and 380mV at 1.5A, ±1.5% output voltage accuracy, and an error flag for output monitoring - used in microprocessor power supplies and GTL bus terminators.
For engineers reviewing the LP3962ES-2.5/NOPB datasheet, LP3962ES-2.5/NOPB pinout, LP3962ES-2.5/NOPB application, or LP3962ES-2.5/NOPB equivalent, key selection criteria include dropout performance under 1.5A load, error flag behavior during undervoltage, thermal shutdown threshold (165°C), ground pin current (5mA at full load), and SOT-223-5 package compatibility with PCB layout constraints for stability.
Technical Context
The LP3962ES-2.5/NOPB uses a CMOS-based PMOS pass element with 240mΩ typical RDS(on), enabling ultra-low dropout and load-independent quiescent current. Its error flag comparator monitors VOUT with 10% threshold hysteresis and open-drain output requiring external 10kΩ pull-up.
It operates from 2.5V to 7.0V input, supports −40°C to +125°C junction temperature, and integrates overtemperature (165°C trip, 10°C hysteresis) and short-circuit protection (4.5A limit). Shutdown mode draws only 15µA, and line/load regulation are specified at 0.06% and 0.04%, respectively.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±1.5% at 25°C; ±3.0% over full temperature/load range - ensures stable core logic supply in embedded microcontrollers. |
| Dropout Voltage | 38mV @ 150mA / 380mV @ 1.5A - enables operation with minimal VIN–VOUT margin, critical for battery-powered 3.3V systems stepping down to 2.5V. |
| Max Output Current | 1.5A DC continuous - sufficient for powering FPGA I/O banks or DSP cores without external current boosting. |
| Ground Pin Current | 5mA @ 1.5A - low bias current preserves efficiency in high-current LDO applications where IGND contributes directly to total system loss. |
| Error Flag Threshold | Triggers low when VOUT falls >10% below nominal - provides reliable early-warning signal for upstream supply failure or overload before system reset. |
| Shutdown Quiescent Current | 15µA - allows deep-sleep mode in portable devices while retaining fast wake-up capability (<25µs turn-on delay). |
| PSRR | 60dB @ 120Hz (VIN = VOUT+1.5V, COUT = 100µF) - suppresses ripple from upstream switching regulators feeding sensitive analog circuitry. |
| Operating Temp Range | −40°C to +125°C junction - qualified for under-hood automotive modules and industrial motor control environments. |
Pinout & Package
SOT-223-5 surface-mount package with exposed thermal pad (pin 3 is VOUT, pin 5 is GND); thermally enhanced for 1.5A operation without heatsink on 0.5in² 1oz copper area (θJA = 90°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SD | CMOS-level shutdown enable | Pulled high via 10kΩ resistor; drives regulator into 15µA sleep mode when low - enables system-level power sequencing. |
| 2 - VIN | Main input supply connection | Accepts 2.5V–7.0V; requires ≥68µF low-ESR input capacitor within 1cm to prevent instability from source impedance. |
| 3 - VOUT | Regulated 2.5V output | Delivers up to 1.5A; must connect ≥33µF output capacitor with 0.2–5Ω ESR for loop stability - ceramic not acceptable alone due to ESR too low. |
| 4 - ERROR | Open-drain fault indicator | Sinks current when VOUT drops >10%; requires external pull-up; invalid during shutdown - used for host MCU fault logging or supervisor IC triggering. |
| 5 - GND | Power and signal reference | Single-point Kelvin connection required for input/output capacitors to avoid ground bounce-induced oscillation - critical for noise-sensitive applications. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout architecture | 38mV @ 150mA enables 2.5V output from 2.8V Li-ion single-cell or 3.3V rail with <300mV headroom. |
| Integrated error flag with hysteresis | 10% threshold + 5% hysteresis prevents chatter during marginal input conditions - eliminates need for external supervisor IC. |
| CMOS process with load-independent IQ | 15µA shutdown and ~5mA operating ground current regardless of load - simplifies power budgeting in variable-load systems. |
| Thermal and short-circuit protection | 165°C shutdown with 10°C hysteresis and 4.5A current limiting - protects against sustained overload without external foldback circuitry. |
| Stable with standard tantalum output caps | 0.2–5Ω ESR window allows use of low-cost, temperature-stable solid tantalum capacitors - avoids expensive polymer or hybrid alternatives. |
| High PSRR at low frequencies | 60dB @ 120Hz rejects switching noise from DC/DC converters - maintains clean 2.5V supply for ADC references or PLL VCOs. |
Applications
| Microprocessor Core Supply | GTL/GTL+ Bus Termination |
|---|---|
Use Scenario: Powering 2.5V I/O domains of Intel Pentium-class CPUs or ASICs requiring tight voltage tolerance and fast transient response. IC Role / Device Role / Timing Role: Primary post-regulator delivering clean, low-noise 2.5V from a higher intermediate rail (e.g., 3.3V or 5V). Use Value: 0.04% load regulation and 380mV dropout at 1.5A ensure stable voltage during CPU burst loads without brownout. | Use Scenario: Providing termination voltage for GTL/GTL+ signaling buses in server memory controllers and chipset interfaces. IC Role / Device Role / Timing Role: Precision 2.5V reference source with low output impedance and fast step-load recovery. Use Value: ±1.5% initial accuracy and 60dB PSRR maintain signal integrity across wide temperature ranges and noisy board environments. |
| DSP Power Management | SCSI-3 Active Terminator |
Use Scenario: Supplying 2.5V to TI C6000-series DSPs during real-time audio/video processing with dynamic current draw. IC Role / Device Role / Timing Role: Low-noise, high-current LDO supporting rapid load transients without output sag or overshoot. Use Value: 150µV RMS broadband noise (10Hz–100kHz) prevents clock jitter degradation in high-speed serial interfaces. | Use Scenario: Replacing discrete resistor networks in SCSI-3 active terminators requiring regulated 2.5V bias for differential receivers. IC Role / Device Role / Timing Role: Fixed-output voltage source with integrated fault detection for hot-plug-safe backplane designs. Use Value: ERROR flag signals open-circuit or overtemp events before termination failure corrupts data transfer. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TSS721AIDR | Fixed 2.5V, 1.5A, but no error flag; 120mV dropout @ 1.5A; SOIC-8 package | Lacks fault reporting; higher dropout limits use in low-headroom systems | Select when error monitoring is unnecessary and SOIC-8 footprint is preferred over SOT-223. |
| TPS76725QPWPRQ1 | Automotive-grade 2.5V/1.5A LDO with power-good flag; 250mV dropout @ 1.5A; thermal shutdown at 150°C | Qualified per AEC-Q100; lower thermal trip point; higher cost | Choose for automotive infotainment or ADAS modules requiring extended temperature and qualification compliance. |
Compared with LP3962ES-2.5/NOPB, TSS721AIDR trades fault visibility for smaller footprint and simpler BOM, while TPS76725QPWPRQ1 adds automotive qualification and tighter thermal control at the expense of higher dropout and cost - making LP3962ES-2.5/NOPB optimal for industrial and computing applications needing balance of performance, diagnostics, and cost.
Availability
LP3962ES-2.5/NOPB is available at Aetrix Electronics and suitable for microprocessor power supplies, GTL bus terminators, and DSP power management requiring stable component supply across long-lifecycle industrial programs.
Supply support for LP3962ES-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 leader designing analog ICs, embedded processors, and connectivity solutions for industrial, automotive, and communications markets.
The LP3962 series belongs to TI's precision ultra-low-dropout linear regulator product line, engineered for high-current, low-noise power delivery in space-constrained digital systems where fast transient response and fault visibility are critical.
FAQ
What is the minimum input voltage required for LP3962ES-2.5/NOPB to regulate 2.5V output?
The LP3962ES-2.5/NOPB requires VIN ≥ VOUT + VDROPOUT. With 380mV typical dropout at 1.5A, minimum VIN is 2.88V under full load. At light load (150mA), 38mV dropout allows VIN as low as 2.538V. The absolute minimum operating VIN is 2.5V per datasheet, but actual regulation depends on load-dependent dropout.
Does LP3962ES-2.5/NOPB require an external pull-up resistor on the ERROR pin?
Yes - the ERROR pin is open-drain and must be pulled high with a 10kΩ resistor (recommended range: 10kΩ–1MΩ) to generate a valid logic-high when output is in regulation. If unused, ERROR must be tied to GND per TI's application guidance; leaving it floating causes undefined behavior.
Can LP3962ES-2.5/NOPB be used with ceramic output capacitors?
No - the LP3962ES-2.5/NOPB requires output capacitor ESR between 0.2Ω and 5Ω for stability. Standard ceramic capacitors have ESR <10mΩ and will cause oscillation. Tantalum (e.g., 33µF, 1Ω ESR) or aluminum polymer capacitors meeting the ESR window are required; ceramics may be added in parallel only if total equivalent ESR remains within spec.
What thermal derating applies to LP3962ES-2.5/NOPB in SOT-223-5 package?
In SOT-223-5 with 0.5in² 1oz copper, θJA = 90°C/W. At ambient 85°C, max allowable power dissipation is (125°C − 85°C)/90°C/W = 0.44W. For 1.5A load, this limits usable VIN–VOUT differential to ≤293mV - confirming need for low-headroom design or heatsinking above that point.
How does the shutdown function behave in LP3962ES-2.5/NOPB?
Driving SD low disables the pass element, reducing quiescent current to 15µA typical. During shutdown, the ERROR pin is forced invalid (high-impedance), and VOUT decays passively. Turn-off delay is 20µs; turn-on delay is 25µs. SD must be actively terminated - a 10kΩ pull-up is mandatory unless driven by rail-to-rail CMOS logic.
LP3962ES-2.5/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Tube
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 7V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.55V @ 1.5A
- Current - Output:
- 1.5A
- Current - Quiescent (Iq):
- 9 mA
- Current - Supply (Max):
- 15 mA
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263 (DDPAK-5)
LP3962ES-2.5/NOPB FAQ
1.How can I place an order for LP3962ES-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3962ES-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 LP3962ES-2.5/NOPB reliable?
The price and inventory of LP3962ES-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 LP3962ES-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LP3962ES-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3962ES-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3962ES-2.5/NOPB?
LP3962ES-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3962ES-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 LP3962ES-2.5/NOPB?
For technical support, including LP3962ES-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3962ES-2.5/NOPB requirements.
6.How does Aetrix verify that LP3962ES-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3962ES-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 LP3962ES-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LP3962ES-2.5/NOPB?
All LP3962ES-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3962ES-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 LP3962ES-2.5/NOPB part is unused and in its original packaging.
Return procedure for LP3962ES-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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