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Texas Instruments LP2966IMM-2518/NOPB
- Part No.:
- LP2966IMM-2518/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LP2966IMM-2518/NOPB.pdf
- Description:
- IC REG LIN 2.5/1.8V 150MA 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,559
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Product details
Overview
LP2966IMM-2518/NOPB from Texas Instruments (formerly National Semiconductor) is a dual-channel ultra-low-dropout linear regulator IC delivering 2.5V and 1.8V outputs at up to 150mA each, operating from 2.7V–7.0V input. It features independent active-low shutdown pins (SD1/SD2), open-drain error flags (ERROR1/ERROR2), ±1% output voltage accuracy at room temperature, and MSOP-8 packaging for space-constrained portable power rails.
For engineers reviewing the LP2966IMM-2518/NOPB datasheet, LP2966IMM-2518/NOPB pinout, LP2966IMM-2518/NOPB application, or LP2966IMM-2518/NOPB equivalent, key selection criteria include dropout voltage at 150mA (135mV typ), ground pin current (340µA typ at 100mA with one LDO on), shutdown quiescent current (<1µA), error flag threshold (−10% VOUT), and compatibility with 1µF ceramic output capacitors.
Technical Context
The LP2966IMM-2518/NOPB integrates two independent PMOS-based LDO regulators sharing a common input and ground, each with dedicated shutdown and error flag circuitry. Its architecture enables low-noise operation (150µVrms, 10Hz–100kHz) and high PSRR (60dB at 120Hz) due to optimized internal reference and biasing.
Each regulator uses a 1Ω RDS(on) pass device, resulting in linear dropout behavior (0.9mV at 1mA, 135mV at 150mA). Cross-regulation is tightly controlled (0.0004mV/mA), and thermal shutdown activates at 165°C with 25°C hysteresis - critical for sustained 150mA operation in compact layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltages | 2.5V and 1.8V - fixed, factory-set; enables dual-rail supply for core/I/O domains in microcontrollers or FPGAs |
| Max Output Current | 150mA per channel - guaranteed over −40°C to +125°C junction temperature range |
| Dropout Voltage | 135mV at 150mA load - allows regulation from 2.8V input for 2.5V rail and 2.0V input for 1.8V rail |
| Output Accuracy | ±1% at 25°C - ensures stable logic-level compliance for 1.8V I/O and 2.5V analog subsystems |
| Ground Pin Current | 340µA at 100mA (one LDO on) - minimizes battery drain in always-on sensor nodes |
| Error Flag Threshold | −10% VOUT - provides early warning of input undervoltage or overload before output collapse |
| Shutdown Current | <1µA total - supports multi-week standby in portable medical or IoT devices |
Pinout & Package
LP2966IMM-2518/NOPB is housed in an MSOP-8 (Mini SO-8) surface-mount package (NS package code MUA08A), 3.0mm × 3.0mm × 1.0mm, with exposed pad for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply connection | Common input for both regulators; must be decoupled with ≥1µF capacitor near pin |
| SD1 | Active-low shutdown for VOUT1 (2.5V) | Pulled low to disable 2.5V output; requires pull-up resistor if driven by open-drain source |
| SD2 | Active-low shutdown for VOUT2 (1.8V) | Independent control enables staggered power sequencing or dynamic rail gating |
| GND | Power and signal ground reference | Shared return path; layout must minimize impedance to support low-noise regulation |
| ERROR2 | Open-drain fault indicator for VOUT2 | Sinks current when 1.8V output drops >10%; requires external pull-up for logic-level interface |
| ERROR1 | Open-drain fault indicator for VOUT1 | Enables real-time monitoring of 2.5V rail integrity without additional supervisor IC |
| VOUT2 | 1.8V regulated output | Delivers up to 150mA; requires ≥1µF ceramic capacitor with stable ESR for stability |
| VOUT1 | 2.5V regulated output | Delivers up to 150mA; compatible with low-ESR tantalum or polymer aluminum capacitors |
Key Features
| Feature | Design Value |
|---|---|
| Independent shutdown control | SD1 and SD2 allow selective disabling of 2.5V or 1.8V rail - essential for power-state transitions in ARM Cortex-M systems |
| Low-noise regulation | 150µVrms (10Hz–100kHz) enables clean supply for ADCs, RF transceivers, and precision analog front-ends |
| Minimal external components | Stable with only 1µF output capacitance - reduces BOM count and PCB area vs legacy LDOs requiring 10µF+ |
| Over-temperature protection | Thermal shutdown at 165°C with 25°C hysteresis prevents damage during transient overloads or poor heatsinking |
| Reverse current blocking | Internal PMOS structure blocks reverse current flow from VOUT to VIN - avoids backfeeding in multi-rail systems |
Applications
| Mobile Baseband Processing | Industrial Sensor Node |
|---|---|
Use Scenario: Powering ARM9/ARM11 application processors with separate 2.5V core and 1.8V I/O rails in cellular handsets. IC Role / Device Role / Timing Role: Dual-output LDO providing tightly regulated, low-noise, sequenced supplies with independent enable control. Use Value: Eliminates need for two discrete regulators and external sequencing logic - reduces solution size by 35% and improves power-up reliability. | Use Scenario: Supplying 1.8V for ultra-low-power MCU and 2.5V for precision 24-bit sigma-delta ADC in battery-operated environmental monitors. IC Role / Device Role / Timing Role: Primary power management IC delivering stable, low-ripple rails with error flag monitoring for system health diagnostics. Use Value: 150µVrms noise and ±1% accuracy ensure <0.001% measurement error in high-resolution data acquisition. |
| USB-Powered Peripherals | Wearable Health Monitor |
Use Scenario: Regulating 5V USB input to 2.5V (for USB PHY) and 1.8V (for microcontroller) in portable HID devices. IC Role / Device Role / Timing Role: Input-to-rail converter with fast turn-on delay (25µs) enabling responsive plug-and-play operation. Use Value: 135mV dropout at 150mA allows full USB 2.0 specification compliance down to 4.35V input - no brownout during cable voltage drop. | Use Scenario: Powering 1.8V BLE radio and 2.5V optical heart-rate sensor in coin-cell-powered wearables. IC Role / Device Role / Timing Role: Ultra-low-quiescent LDO enabling multi-month battery life with active error flag reporting for low-battery detection. Use Value: <1µA shutdown current extends shelf life; ERROR1/ERROR2 provide fail-safe shutdown before sensor data corruption occurs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS70251PWPR | 2.5V/1.8V outputs; 200mA per channel; higher dropout (170mV at 150mA); 16-pin HTSSOP | Larger footprint; higher thermal resistance; no error flags | Choose for higher current margin where board space permits and fault monitoring is not required |
| MCP1826S-25018T | 2.5V/1.8V outputs; 300mA per channel; 250mV dropout at 150mA; SOT-23-6 package (single output) | Requires two separate ICs; no integrated error flags or shutdown independence | Choose for cost-sensitive designs needing higher current but accepting doubled component count and reduced integration |
Compared with TPS70251PWPR and MCP1826S-25018T, LP2966IMM-2518/NOPB offers superior integration (dual outputs + dual error flags + dual shutdown in MSOP-8), lower dropout, and lower noise - making it optimal for space- and performance-constrained portable electronics where reliability monitoring is critical.
Availability
LP2966IMM-2518/NOPB is available at Aetrix Electronics and suitable for mobile baseband processing, industrial sensor nodes, USB-powered peripherals, wearable health monitors, and other battery-powered applications requiring stable component supply across extended temperature ranges.
Supply support for LP2966IMM-2518/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 acquired National Semiconductor in 2011 and maintains its precision analog portfolio, including ultra-low-dropout regulators designed for high-reliability, low-power systems.
The LP2966 series was developed specifically for dual-rail portable electronics - targeting applications demanding independent regulation, minimal quiescent current, and robust fault signaling in compact form factors.
FAQ
What is the maximum input voltage rating for LP2966IMM-2518/NOPB?
The absolute maximum input voltage for LP2966IMM-2518/NOPB is 7.5V, but the recommended operating range is 2.7V to 7.0V. Exceeding 7.0V may degrade long-term reliability or trigger overvoltage stress on internal structures. The device includes input survival rating up to 7.5V for transient conditions only - sustained operation above 7.0V is not guaranteed per datasheet specifications.
Can LP2966IMM-2518/NOPB operate with ceramic output capacitors?
Yes, LP2966IMM-2518/NOPB is fully compatible with ceramic output capacitors, including X7R types, provided minimum 1µF capacitance is used and ESR remains within the stable region across temperature and frequency. For 2.5V and 1.8V outputs, ceramic caps are preferred due to their low ESR and stability - eliminating need for bulkier tantalum alternatives.
How does the error flag function on LP2966IMM-2518/NOPB?
The ERROR1 and ERROR2 pins on LP2966IMM-2518/NOPB are open-drain outputs that go low when the corresponding regulated output drops more than 10% below nominal (i.e., below 2.25V for VOUT1 or 1.62V for VOUT2). Each flag includes built-in hysteresis (5% typical) to prevent chatter during marginal conditions, and both pins must be pulled up externally or grounded if unused.
What is the thermal shutdown behavior of LP2966IMM-2518/NOPB?
LP2966IMM-2518/NOPB activates thermal shutdown at 165°C junction temperature and remains latched off until junction temperature falls by ~25°C (hysteresis). During shutdown, both outputs disable and quiescent current drops below 1µA. Recovery is automatic upon cooling - no external reset is needed. This protects against permanent damage during sustained overload or inadequate PCB copper area.
Is LP2966IMM-2518/NOPB RoHS-compliant and lead-free?
Yes, LP2966IMM-2518/NOPB carries the /NOPB suffix, indicating lead-free (Pb-free) and RoHS-compliant construction per TI's quality standards. It meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) and is qualified for reflow soldering per IPC/JEDEC J-STD-020D. Full compliance documentation is available via TI's product change notifications (PCNs).
LP2966IMM-2518/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 2
- Voltage - Input (Max):
- 7V
- Voltage - Output (Min/Fixed):
- 2.5V, 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.27V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 300 µA
- Current - Supply (Max):
- 600 µA
- PSRR:
- 60dB ~ 40dB (120Hz)
- 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:
- 8-VSSOP
LP2966IMM-2518/NOPB FAQ
1.How can I place an order for LP2966IMM-2518/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2966IMM-2518/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 LP2966IMM-2518/NOPB reliable?
The price and inventory of LP2966IMM-2518/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP2966IMM-2518/NOPB is usually 5 days.
3.What payment methods are accepted for LP2966IMM-2518/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2966IMM-2518/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2966IMM-2518/NOPB?
LP2966IMM-2518/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2966IMM-2518/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 LP2966IMM-2518/NOPB?
For technical support, including LP2966IMM-2518/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2966IMM-2518/NOPB requirements.
6.How does Aetrix verify that LP2966IMM-2518/NOPB is sourced from the original manufacturer or authorized distributors?
All LP2966IMM-2518/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 LP2966IMM-2518/NOPB meets industry standards.
7.What is the process for return or replacement of LP2966IMM-2518/NOPB?
All LP2966IMM-2518/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP2966IMM-2518/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 LP2966IMM-2518/NOPB part is unused and in its original packaging.
Return procedure for LP2966IMM-2518/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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