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Texas Instruments LP2966IMM-2525/NOPB
- Part No.:
- LP2966IMM-2525/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LP2966IMM-2525/NOPB.pdf
- Description:
- IC REG LINEAR 2.5V 150MA 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:420
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Product details
Overview
LP2966IMM-2525/NOPB from Texas Instruments is a dual ultra-low-dropout linear regulator IC delivering two independent 2.5V outputs at up to 150mA each, with ±1% output voltage accuracy, 135mV dropout at full load, and independent active-low shutdown control per channel. It serves as a precision post-regulator in portable battery-powered systems requiring low-noise, low-quiescent-current dual-rail power.
For engineers reviewing the LP2966IMM-2525/NOPB datasheet, LP2966IMM-2525/NOPB pinout, LP2966IMM-2525/NOPB application, or LP2966IMM-2525/NOPB equivalent, key selection considerations include dual-output stability under light-to-full load, error flag monitoring for each rail, thermal/overcurrent protection, and compatibility with 1µF ceramic output capacitors in space-constrained VSSOP-8 layouts.
Technical Context
The LP2966IMM-2525/NOPB integrates two independent CMOS-based LDO regulators sharing a common input (VIN) and ground (GND), each with dedicated shutdown (SD1/SD2) and open-drain error flag (ERROR1/ERROR2) pins. Its PMOS pass transistor architecture enables ultra-low dropout and reverse-current blocking capability.
Each regulator features internal reference-based feedback, 10% output undervoltage detection with hysteresis on its ERROR pin, and foldback current limiting that delivers >400mA peak per output at room temperature before thermal shutdown activates at 165°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5V per channel, ±1% tolerance at 25°C ensures stable logic supply for 2.5V I/O interfaces without external trimming. |
| Max Output Current | 150mA per channel over −40°C to +125°C junction range supports sustained operation in thermally demanding embedded applications. |
| Dropout Voltage | 135mV at 150mA load enables regulation from 2.635V input - critical for extending battery runtime in single-cell Li-ion or 3-cell NiMH systems. |
| Ground Pin Current | 340µA at 100mA load (one LDO active) minimizes total system quiescent power, enabling multi-day standby in always-on sensors. |
| PSRR | 60dB at 120Hz with 1V headroom suppresses ripple from upstream switching converters, reducing need for additional filtering stages. |
| Output Noise | 150µVrms (10Hz–100kHz) supports noise-sensitive analog circuits like ADC references or RF front-end biasing without added LDO post-filtering. |
| Error Flag Threshold | 10% output undervoltage detection with 5% hysteresis provides reliable fault signaling for system-level power sequencing and watchdog recovery. |
Pinout & Package
VSSOP-8 (DGK) package: 3.0mm × 3.0mm, 0.65mm pitch, exposed thermal pad (not electrically connected), RoHS-compliant matte tin lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Common input supply | Accepts 2.7V–7.0V; powers both regulators - must be decoupled with ≥1µF capacitor near pin. |
| SD1 | Active-low shutdown for VOUT1 | Pulled low disables VOUT1; requires 100kΩ pull-up if driven by open-drain logic; <0.1V threshold ensures clean turn-off. |
| SD2 | Active-low shutdown for VOUT2 | Independent of SD1 - enables flexible power sequencing (e.g., keep VOUT2 active while disabling VOUT1). |
| GND | Power and signal reference | Single ground plane connection for both regulators and error flags; layout must minimize impedance to maintain PSRR and noise performance. |
| ERROR2 | Open-drain fault indicator for VOUT2 | Sinks 1mA when VOUT2 drops >10% below 2.5V; requires external pull-up (100kΩ–1MΩ) to avoid excessive battery drain. |
| ERROR1 | Open-drain fault indicator for VOUT1 | Functionally identical to ERROR2; allows independent monitoring of each 2.5V rail in safety-critical or redundant systems. |
| VOUT2 | Regulated 2.5V output 2 | Delivers up to 150mA; requires ≥1µF ceramic capacitor directly at pin for stability and transient response. |
| VOUT1 | Regulated 2.5V output 1 | Electrically isolated from VOUT2; cross-regulation <0.0004mV/mA ensures minimal coupling during dynamic load changes. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent LDOs | Enables split-rail or redundant 2.5V supplies from one IC - reduces BOM count and PCB area vs. two discrete regulators. |
| Ultra-low dropout | 135mV at 150mA allows operation down to 2.635V input, maximizing usable capacity from aging or partially discharged batteries. |
| Low-noise regulation | 150µVrms broadband noise eliminates need for external RC filters in precision analog subsystems powered by 2.5V rails. |
| Per-channel error flags | Open-drain ERROR1/ERROR2 signals enable microcontroller GPIO monitoring of individual rail health - essential for fault logging and graceful shutdown. |
| Thermal & short-circuit protection | 165°C junction shutdown with 25°C hysteresis prevents permanent damage during sustained overload or poor heatsinking conditions. |
Applications
| Cellular Baseband Power | Portable Medical Sensors |
|---|---|
Use Scenario: Powers 2.5V baseband processor core and I/O interface in compact LTE modules where battery life and thermal density are constrained. IC Role / Device Role / Timing Role: Dual LDO provides tightly regulated, low-noise 2.5V rails with independent enable control for power-state transitions (e.g., sleep/wake). Use Value: 135mV dropout extends usable battery voltage range by ~150mV per cell; 150µVrms noise avoids digital interference in sensitive RF receive paths. | Use Scenario: Supplies 2.5V analog front-end (AFE) and digital controller in handheld ECG or glucose monitors operating from coin-cell or LiPo batteries. IC Role / Device Role / Timing Role: Regulates precision sensor bias and microcontroller I/O voltage; ERROR flags trigger alert on rail collapse due to battery depletion or load fault. Use Value: ±1% output accuracy maintains ADC reference integrity; <1µA shutdown current enables multi-week shelf life without battery replacement. |
| Industrial PLC I/O Modules | USB-Powered Test Equipment |
Use Scenario: Generates isolated 2.5V logic rails for digital isolators and level shifters in DIN-rail mounted I/O expansion modules powered from 24V DC bus. IC Role / Device Role / Timing Role: Post-regulator after wide-input DC-DC converter; independent SD pins allow firmware-controlled power gating of unused I/O banks. Use Value: 60dB PSRR at 120Hz attenuates switching noise from upstream converter; VSSOP-8 footprint fits high-density industrial PCB layouts. | Use Scenario: Provides clean 2.5V supply for USB 2.0 transceiver PHY and microcontroller in portable oscilloscope probes or logic analyzers drawing power from USB host port. IC Role / Device Role / Timing Role: Low-noise dual LDO replaces noisy USB VBUS directly; ERROR flags detect brownout during USB cable disconnection or host sleep. Use Value: 1µF minimum output capacitance simplifies layout vs. larger tantalum alternatives; −40°C to +125°C rating supports operation in uncontrolled lab environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPL7407LPGEDR | Single 7-channel 500mA sink driver with integrated LDO; no dual 2.5V outputs or error flags. | Designed for LED/display driver loads, not precision dual-rail regulation. | Select only if driving high-side loads with built-in current limiting is primary requirement - not a functional substitute for LP2966IMM-2525/NOPB. |
| TPS7A2025PDQNR | Single 2.5V LDO (300mA), 165mV dropout, 12µVrms noise, no second output or error flag. | Lacks dual-output capability and fault monitoring - requires two units plus external logic for equivalent functionality. | Choose when ultra-low noise (<15µVrms) is mandatory for one rail and board area permits duplication; not suitable for space-constrained dual-rail designs. |
Compared with TPL7407LPGEDR and TPS7A2025PDQNR, the LP2966IMM-2525/NOPB uniquely delivers matched 2.5V dual outputs with per-rail fault detection and thermal protection in a single VSSOP-8 package - eliminating inter-rail coupling risks and reducing component count by 50% versus dual-single solutions.
Availability
LP2966IMM-2525/NOPB is available at Aetrix Electronics and suitable for cellular baseband power, portable medical sensors, industrial PLC I/O modules, and USB-powered test equipment requiring stable component supply across automotive, industrial, and consumer design cycles.
Supply support for LP2966IMM-2525/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 headquartered in Dallas, Texas, specializing in analog, embedded processing, and connectivity technologies for industrial, automotive, and personal electronics markets.
The LP2966 product line was designed specifically for battery-powered portable applications requiring dual, independently controlled ultra-low-dropout regulation with minimal quiescent current and robust fault reporting - targeting GPS receivers, palmtop computers, and wireless data terminals.
FAQ
What output voltage does the LP2966IMM-2525/NOPB provide?
The LP2966IMM-2525/NOPB provides two identical, fixed 2.5V outputs - VOUT1 and VOUT2 - each rated for ±1% accuracy at 25°C and across the full −40°C to +125°C junction temperature range. This dual 2.5V configuration is factory-trimmed and non-adjustable, making LP2966IMM-2525/NOPB ideal for applications requiring matched low-voltage rails such as mixed-signal SoCs or dual-core microcontrollers.
Does the LP2966IMM-2525/NOPB support independent shutdown of each output?
Yes, the LP2966IMM-2525/NOPB features fully independent active-low shutdown control via SD1 and SD2 pins. Pulling SD1 low disables only VOUT1 while VOUT2 remains active, and vice versa. Each shutdown pin has nanoscale input current (<1nA), enabling direct interface with microcontroller GPIOs without loading. The LP2966IMM-2525/NOPB datasheet specifies 20µs turn-off and 25µs turn-on delays at 100mA load, supporting fast power-state transitions.
What is the minimum output capacitance required for stable operation of the LP2966IMM-2525/NOPB?
The LP2966IMM-2525/NOPB requires a minimum of 1µF ceramic output capacitance per rail (VOUT1 and VOUT2) placed directly at the pin to ensure stability across the full 1mA–150mA load range. Larger values (e.g., 10µF) improve transient response and reduce output noise but are not mandatory. The LP2966IMM-2525/NOPB is optimized for low-ESR X7R ceramics and tolerates ESR as low as 10mΩ - unlike older LDOs requiring higher ESR for phase margin.
How does the error flag functionality work on the LP2966IMM-2525/NOPB?
Each error flag (ERROR1 and ERROR2) is an open-drain output that pulls low when its corresponding 2.5V output drops more than 10% below nominal (i.e., below 2.25V), indicating dropout due to low input voltage, overcurrent, or thermal limit. Hysteresis of 5% prevents chatter near the threshold. The LP2966IMM-2525/NOPB requires an external pull-up resistor (100kΩ–1MΩ) on each ERROR pin; if unused, ERROR pins must be tied to GND to prevent floating states.
What thermal protection mechanisms are built into the LP2966IMM-2525/NOPB?
The LP2966IMM-2525/NOPB incorporates thermal shutdown that activates at 165°C junction temperature, with 25°C hysteresis to prevent oscillation near the trip point. It also features foldback current limiting - reducing output current during overload to limit power dissipation - and internal short-circuit protection. These protections operate independently per channel and are fully specified in the LP2966IMM-2525/NOPB electrical characteristics table, ensuring safe operation even under sustained fault conditions.
LP2966IMM-2525/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:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 2
- Voltage - Input (Max):
- 7V
- Voltage - Output (Min/Fixed):
- 2.5V
- 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-2525/NOPB FAQ
1.How can I place an order for LP2966IMM-2525/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2966IMM-2525/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-2525/NOPB reliable?
The price and inventory of LP2966IMM-2525/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-2525/NOPB is usually 5 days.
3.What payment methods are accepted for LP2966IMM-2525/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2966IMM-2525/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2966IMM-2525/NOPB?
LP2966IMM-2525/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2966IMM-2525/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-2525/NOPB?
For technical support, including LP2966IMM-2525/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2966IMM-2525/NOPB requirements.
6.How does Aetrix verify that LP2966IMM-2525/NOPB is sourced from the original manufacturer or authorized distributors?
All LP2966IMM-2525/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-2525/NOPB meets industry standards.
7.What is the process for return or replacement of LP2966IMM-2525/NOPB?
All LP2966IMM-2525/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP2966IMM-2525/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-2525/NOPB part is unused and in its original packaging.
Return procedure for LP2966IMM-2525/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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