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Texas Instruments LP2966IMM-3325/NOPB
- Part No.:
- LP2966IMM-3325/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LP2966IMM-3325/NOPB.pdf
- Description:
- IC REG LIN 3.3/2.5V 150MA 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:935
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Product details
Overview
LP2966IMM-3325/NOPB from Texas Instruments is a dual ultra-low-dropout linear regulator IC delivering independent 3.3V and 2.5V outputs at up to 150mA each, with dropout as low as 0.9mV at 1mA load, ±1% output voltage accuracy, and <1µA shutdown quiescent current. It serves as a precision post-regulator in battery-powered portable systems requiring tight voltage stability and low noise.
For engineers reviewing the LP2966IMM-3325/NOPB datasheet, LP2966IMM-3325/NOPB pinout, LP2966IMM-3325/NOPB application, or LP2966IMM-3325/NOPB equivalent, key selection criteria include dual-output voltage pairing (3.3V/2.5V), VSSOP-8 package footprint, independent active-low shutdown control, open-drain error flag reporting, and operation across −40°C to +125°C junction temperature.
Technical Context
The LP2966IMM-3325/NOPB integrates two independent PMOS-based LDO regulators sharing a common input (VIN) and ground (GND), each with dedicated shutdown (SD1/SD2) and error flag (ERROR1/ERROR2) pins. Its architecture enables simultaneous regulation of dissimilar voltages without cross-coupling degradation-cross-regulation is specified at just 0.0004 mV/mA.
Each regulator employs internal bandgap reference and error amplifier feedback, supporting low-ESR ceramic or tantalum output capacitors ≥1µF. The device features thermal shutdown (165°C threshold), short-circuit foldback protection (600mA knee), and ripple rejection of 60dB at 120Hz with VIN = VOUT + 1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltages | 3.3V (VOUT1) and 2.5V (VOUT2), factory-set, ±1% accuracy at 25°C ensures reliable logic-level compliance for mixed-voltage SoCs. |
| Max Output Current | 150mA per channel over full −40°C to +125°C junction range-supports sustained power delivery to RF transceivers or microcontroller cores. |
| Dropout Voltage | 135mV at 150mA load-enables operation from single-cell Li-ion (3.0V min) while maintaining 2.5V output under full load. |
| Ground Pin Current | 340µA at 100mA load (one LDO active)-minimizes system standby power loss in always-on subsystems. |
| Output Noise | 150µVrms (10Hz–100kHz, 10µF COUT)-meets low-noise analog supply requirements for ADCs and RF front-ends. |
| Error Flag Threshold | 10% below nominal output voltage with 5% hysteresis-provides robust undervoltage detection without chatter during transient recovery. |
| PSRR | 60dB at 120Hz (VIN = VOUT + 1V)-effectively suppresses switching regulator ripple in hybrid power architectures. |
Pinout & Package
VSSOP-8 (DGK) package: 3.0mm × 3.0mm body, 0.65mm pitch, exposed thermal pad (not electrically connected), RoHS-compliant matte tin lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Input supply rail | Accepts 2.7V–7.0V; must be decoupled with ≥1µF capacitor close to pin to prevent instability. |
| 2 - SD1 | Active-low shutdown for VOUT1 | Pull ≤0.1V to disable 3.3V output; requires 100kΩ pull-up if driven by open-drain source. |
| 3 - SD2 | Active-low shutdown for VOUT2 | Pull ≤0.1V to disable 2.5V output; independent control enables sequenced power-down. |
| 4 - GND | Power ground reference | Common return for both LDOs and error flags; low-impedance PCB plane connection required. |
| 5 - ERROR2 | Open-drain fault indicator for VOUT2 | Sinks current when VOUT2 drops >10% below 2.5V; must be pulled high externally (100kΩ–1MΩ). |
| 6 - ERROR1 | Open-drain fault indicator for VOUT1 | Sinks current when VOUT1 drops >10% below 3.3V; invalid during SD1/SD2 assertion. |
| 7 - VOUT2 | 2.5V regulated output | Delivers up to 150mA; requires ≥1µF low-ESR ceramic/tantalum capacitor for stability. |
| 8 - VOUT1 | 3.3V regulated output | Delivers up to 150mA; decoupling capacitor placement directly impacts transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Independent shutdown control | Enables flexible power sequencing-e.g., keep 3.3V active for MCU while disabling 2.5V for sensor interface during sleep. |
| Low-noise 150µVrms output | Eliminates need for external LC filtering in sensitive analog rails, reducing BOM count and board area. |
| 1µF minimum output capacitance | Supports compact designs using small-case X7R ceramics-no large tantalum or polymer caps required. |
| Open-drain error flags with hysteresis | Allows wired-OR fault aggregation across multiple rails and simplifies host microcontroller GPIO usage. |
| Thermal and short-circuit protection | Prevents damage during overload or poor heatsinking; auto-recovery after fault removal avoids system lockup. |
Applications
| Cellular Baseband Power | USB Peripheral Regulation |
|---|---|
|
Use Scenario: Dual-rail power for LTE modem SoC with 3.3V I/O and 2.5V core logic. IC Role / Device Role / Timing Role: Primary post-regulator supplying clean, sequenced voltages to baseband processor and RF transceiver. Use Value: Independent shutdown allows modem to enter deep-sleep mode (2.5V off) while retaining 3.3V for wake-on-RX functionality. |
Use Scenario: Powering USB 2.0 hub controller and downstream port regulators from 5V bus. IC Role / Device Role / Timing Role: Local LDO generating 3.3V for hub logic and 2.5V for USB PHY termination resistors. Use Value: Low dropout preserves margin under USB cable voltage drop; error flags alert host on overcurrent events. |
| Portable GPS Receiver | Handheld Multimeter MCU Supply |
|
Use Scenario: Battery-powered GNSS module requiring stable 3.3V for RF frontend and 2.5V for high-precision ADC reference. IC Role / Device Role / Timing Role: Precision dual-LDO providing low-noise, low-drift analog and digital supplies from single Li-ion cell. Use Value: 150µVrms noise and ±1% accuracy maintain GPS position accuracy and reduce measurement jitter. |
Use Scenario: Multi-function handheld DMM with segmented LCD, microcontroller, and analog front-end. IC Role / Device Role / Timing Role: Central power manager delivering 3.3V to MCU/LCD driver and 2.5V to precision op-amps and reference buffers. Use Value: Ultra-low 1µA shutdown current extends battery life during meter standby; VSSOP-8 fits tight PCB layouts. |
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 |
|---|---|---|---|
| TPL7407LPGQ | Single 7-channel 500mA sink driver (not LDO); no voltage regulation or dual-output capability. | Designed for LED/relay driving-not applicable as voltage regulator replacement. | Not functionally equivalent; excluded from viable alternatives. |
| TPS7A2033PDBVR | Single-output 3.3V LDO (300mA), no 2.5V rail or error flags; lacks dual-channel independence. | Requires second regulator for 2.5V, increasing component count and layout complexity. | Select only if 2.5V rail is generated elsewhere; not a drop-in substitute for LP2966IMM-3325/NOPB. |
Compared with LP2966IMM-3325/NOPB, neither TPL7407LPGQ nor TPS7A2033PDBVR provides matched dual-output regulation with independent control and fault reporting-making LP2966IMM-3325/NOPB uniquely suited for space-constrained, multi-rail portable systems requiring coordinated power management.
Availability
LP2966IMM-3325/NOPB is available at Aetrix Electronics and suitable for cellular modems, USB peripherals, GPS receivers, and handheld test equipment requiring stable component supply with guaranteed long-term manufacturability.
Supply support for LP2966IMM-3325/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 specializing in analog, embedded processing, and power management ICs, with decades of expertise in high-reliability linear regulators and low-noise power solutions.
The LP2966 family was designed specifically for battery-powered portable electronics needing dual, independently controlled ultra-low-dropout regulation in minimal footprint-targeting cellular handsets, GPS modules, and handheld instrumentation.
FAQ
What output voltages does the LP2966IMM-3325/NOPB provide?
The LP2966IMM-3325/NOPB delivers fixed 3.3V on VOUT1 (pin 8) and 2.5V on VOUT2 (pin 7), factory-trimmed to ±1% accuracy at 25°C across the full load and temperature range. These values are permanently set and not adjustable-confirmed in TI's official datasheet SNVS028E and packaging addendum.
Does the LP2966IMM-3325/NOPB support independent enable control for each output?
Yes, the LP2966IMM-3325/NOPB provides fully independent active-low shutdown via SD1 (pin 2) for the 3.3V output and SD2 (pin 3) for the 2.5V output. Pulling either pin ≤0.1V disables its respective regulator while the other remains operational-enabling precise power sequencing without external logic.
What is the minimum output capacitance required for stable operation of the LP2966IMM-3325/NOPB?
The LP2966IMM-3325/NOPB requires a minimum of 1µF ceramic or tantalum capacitor on each output (VOUT1 and VOUT2) for guaranteed stability across all load conditions. Larger values improve transient response and noise performance but are not mandatory-verified in Section "Output Capacitor Selection" of the SNVS028E datasheet.
How does the error flag functionality work on the LP2966IMM-3325/NOPB?
The LP2966IMM-3325/NOPB features open-drain ERROR1 (pin 6) and ERROR2 (pin 5) outputs that go low when their corresponding output drops >10% below nominal (3.3V or 2.5V), with 5% hysteresis to prevent oscillation. Each flag is disabled during shutdown-TI specifies this behavior in the "Error Flag Operation" section of SNVS028E.
Is the LP2966IMM-3325/NOPB compatible with ceramic output capacitors?
Yes, the LP2966IMM-3325/NOPB is fully compatible with low-ESR ceramic capacitors ≥1µF, including X7R types, for both outputs. TI explicitly confirms ceramic compatibility for output voltages ≥2.5V in the "Output Capacitor Selection" section of SNVS028E, provided capacitance and ESR remain within stability limits over temperature.
LP2966IMM-3325/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):
- 3.3V, 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-3325/NOPB FAQ
1.How can I place an order for LP2966IMM-3325/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2966IMM-3325/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-3325/NOPB reliable?
The price and inventory of LP2966IMM-3325/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-3325/NOPB is usually 5 days.
3.What payment methods are accepted for LP2966IMM-3325/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2966IMM-3325/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2966IMM-3325/NOPB?
LP2966IMM-3325/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2966IMM-3325/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-3325/NOPB?
For technical support, including LP2966IMM-3325/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2966IMM-3325/NOPB requirements.
6.How does Aetrix verify that LP2966IMM-3325/NOPB is sourced from the original manufacturer or authorized distributors?
All LP2966IMM-3325/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-3325/NOPB meets industry standards.
7.What is the process for return or replacement of LP2966IMM-3325/NOPB?
All LP2966IMM-3325/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP2966IMM-3325/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-3325/NOPB part is unused and in its original packaging.
Return procedure for LP2966IMM-3325/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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