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Texas Instruments LP2975IMM-5.0/NOPB
- Part No.:
- LP2975IMM-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LP2975IMM-5.0/NOPB.pdf
- Description:
- IC LNR REG CTRLR 1OUT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,454
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Product details
Overview
LP2975IMM-5.0/NOPB from Texas Instruments is a high-current LDO controller IC that drives an external P-channel MOSFET to implement ultra-low-dropout linear regulation. It delivers 5.0 V output with ±1.5% accuracy (A-grade), supports 1.8 V to 24 V input, draws only 180 µA quiescent current at 5 V input, and features <1 µA shutdown current - enabling high-efficiency post-regulation in power-constrained systems such as industrial PLCs and telecom line cards.
For engineers reviewing the LP2975IMM-5.0/NOPB datasheet, LP2975IMM-5.0/NOPB pinout, LP2975IMM-5.0/NOPB application, or LP2975IMM-5.0/NOPB equivalent, key selection considerations include its VSSOP-8 package footprint, gate-drive capability for discrete P-FETs, programmable current-limit threshold (57 mV), thermal shutdown protection, and compatibility with high-current (>5 A) low-noise LDO designs requiring minimal dropout voltage.
Technical Context
The LP2975IMM-5.0/NOPB operates as a precision error amplifier with internal 1.24 V bandgap reference and open-loop gain of 5000 V/V, enabling tight load/line regulation (e.g., 0.012% load regulation at 5 A). Its feedback loop controls external P-FET gate voltage to maintain regulated output, while the COMP pin provides access to the error amplifier output for stability compensation.
It integrates overtemperature protection (trip at ~150°C), built-in current-limit amplifier with 57 mV sense threshold, and ON/OFF control with 0.7–1.2 V logic-compatible threshold. The gate drive stage sources up to 3.5 mA and sinks up to 1.1 mA, supporting fast transient response when paired with low-gate-charge FETs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±1.5% (A grade) at 25°C; trimmed for stable operation across −40°C to +125°C junction range. |
| Input Voltage Range | 1.8 V to 24 V - supports wide-input post-regulation after buck converters or unregulated DC rails. |
| Quiescent Current | 180 µA typical at VIN = 5 V - enables low-power standby modes without compromising startup speed. |
| Shutdown Current | <1 µA - ensures negligible battery drain in always-on systems during inactive states. |
| Current Sense Threshold | 57 mV (±13 mV) - sets precise short-circuit current limit with minimal I²R loss in sense resistor. |
| Gate Drive Capability | Sources 3.5 mA / sinks 1.1 mA - sufficient to rapidly charge/discharge gate capacitance of common P-FETs (e.g., NDP6020P). |
| Thermal Protection | Internal shutdown at ~150°C junction temperature - prevents catastrophic failure under overload or poor heatsinking. |
Pinout & Package
LP2975IMM-5.0/NOPB is housed in an 8-pin VSSOP (Very Small Outline Package) with 0.5 mm pitch, package code DGK0008A. Pin 6 is NC (no internal connection); all other pins are electrically active and validated per TI SNVS006F datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input Supply | Primary power input (1.8–24 V); supplies internal circuitry and gate drive; withstands up to +26 V survival rating. |
| GATE | P-FET Gate Driver Output | Drives external P-channel MOSFET gate; clamped to VIN −15 V min; capable of sourcing/sinking >1 mA for fast switching. |
| COMP | Error Amplifier Output | Provides access to internal op-amp output for external compensation network (e.g., RC feed-forward capacitor). |
| FB | Feedback Input | Monitors output via resistor divider; compares to internal 1.24 V reference to regulate output voltage. |
| CL | Current Limit Sense Input | Inputs voltage drop across external sense resistor; triggers current limiting at 57 mV threshold. |
| NC | No Connect | Pin 6 has no internal bond wire or die connection; must be left floating or grounded per layout best practice. |
| ON/OFF | Enable Control Input | Logic-level shutdown: <0.7 V disables regulator (gate pulled low); >0.87 V enables (typical thresholds). |
| GND | Ground Reference | Analog and power ground return; requires low-impedance PCB connection to minimize noise and regulation error. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 180 µA typical at 5 V input enables >10-year battery life in always-on monitoring nodes. |
| User-selectable dropout voltage | Determined solely by RDS(ON) of external P-FET and sense resistor - allows optimization for 100 mV to 700 mV dropout. |
| Integrated current-limit amplifier | 57 mV threshold minimizes power loss in sense resistor while enabling accurate 5–10 A short-circuit protection. |
| High open-loop gain (5000 V/V) | Ensures <0.1% load regulation even at 5 A output, critical for FPGA core supply stability. |
| −40°C to +125°C operation | Qualified for extended temperature industrial and automotive under-hood applications without derating. |
Applications
| Industrial PLC I/O Module | Telecom Line Card Post-Regulator |
|---|---|
Use Scenario: Regulating 5 V from a 12 V intermediate rail to power isolated CAN transceivers and analog front-ends in modular I/O bases. IC Role / Device Role / Timing Role: LDO controller driving NDP6020P P-FET to deliver clean, low-noise 5 V at up to 5 A with <0.02% load regulation. Use Value: Eliminates need for discrete op-amp + transistor solutions; reduces BOM count by 4 components vs. legacy designs. |
Use Scenario: Providing tightly regulated 5 V to high-speed SerDes PHYs after a primary 48 V-to-12 V DC/DC converter. IC Role / Device Role / Timing Role: Precision error amplifier maintaining 5.0 V ±15 mV under 0–5 A dynamic load steps with 75 µVrms output noise. Use Value: Meets jitter-sensitive SerDes supply requirements without adding ferrite beads or extra LC filtering stages. |
| Medical Imaging Sensor Bias Supply | Automotive ADAS Camera Power |
Use Scenario: Generating ultra-low-noise 5 V bias for CMOS image sensor analog chains in portable ultrasound devices. IC Role / Device Role / Timing Role: Low-quiescent-current LDO controller enabling <1 µA shutdown mode between imaging bursts. Use Value: Extends single-cell Li-ion battery runtime by 38% compared to standard LDOs with 50 µA IQ. |
Use Scenario: Regulating 5 V from vehicle battery (9–16 V) for camera module ISPs, meeting AEC-Q100 Grade 2 temp range. IC Role / Device Role / Timing Role: High-temp-rated controller (−40°C to +125°C) with thermal shutdown protecting against engine-bay overheating. Use Value: Enables direct replacement of automotive-grade discrete regulators without redesigning gate-drive loop compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2940CT-5.0 | Fixed 5 V LDO IC (not controller); integrated NPN pass transistor; 600 mV typical dropout; no external FET option. | Lower current (1 A max); unsuitable for >2 A loads or ultra-low-dropout designs; no current-limit programming. | Select LM2940CT-5.0 only for cost-sensitive, low-current (<1 A), space-constrained applications where external FET flexibility is unnecessary. |
| TPS7A8300RGRT | Ultra-low-noise (4.7 µVrms) 3-A LDO IC with integrated PMOS pass device; 1.1 V dropout at 3 A; no external current sense. | Higher PSRR (>60 dB @ 100 kHz); fixed 5 V output; lacks programmable current limit and gate-drive flexibility of LP2975IMM-5.0/NOPB. | Choose TPS7A8300RGRT when sub-5 µVrms noise and high-frequency ripple rejection are mandatory, and 3 A output suffices. |
Compared with LM2940CT-5.0 and TPS7A8300RGRT, LP2975IMM-5.0/NOPB uniquely enables scalable high-current (>5 A) LDOs with user-defined dropout, programmable current limit, and thermal robustness - making it the only choice for industrial and telecom systems demanding both precision regulation and field-serviceable FET replacement.
Availability
LP2975IMM-5.0/NOPB is available at Aetrix Electronics and suitable for industrial PLCs, telecom line cards, medical imaging subsystems, and automotive ADAS camera modules requiring stable component supply across long production lifecycles.
Supply support for LP2975IMM-5.0/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 high-reliability power management ICs, with decades of expertise in precision voltage regulation and industrial-grade signal conditioning.
The LP2975IMM-5.0/NOPB belongs to TI's high-current LDO controller product line, designed specifically for engineers building scalable, low-dropout linear regulators using discrete P-FETs in harsh-environment applications demanding wide input range and extended temperature operation.
FAQ
What is the function of the COMP pin on the LP2975IMM-5.0/NOPB?
The COMP pin on the LP2975IMM-5.0/NOPB provides access to the output of the internal error amplifier. It is used to connect external compensation components - typically a series RC network - to stabilize the control loop when driving high-gate-capacitance P-FETs. Proper compensation prevents oscillation and ensures adequate phase margin, especially when minimizing output capacitance for size or cost constraints. This pin is essential for achieving reliable transient response in LP2975IMM-5.0/NOPB-based designs.
Can the LP2975IMM-5.0/NOPB be used to generate output voltages other than 5.0 V?
Yes, the LP2975IMM-5.0/NOPB can be configured for non-standard outputs using an external resistor divider on the FB pin, as confirmed in TI's SNVS006F datasheet Application Hints. For example, a 3.0 V output was demonstrated using a 237 kΩ resistor in parallel with the internal 39.9 kΩ divider. However, output adjustment is limited to ≤10% deviation from nominal due to mismatched temperature coefficients between internal and external resistors. The LP2975IMM-5.0/NOPB itself remains a 5.0 V–trimmed device; the FB network redefines regulation point.
What is the maximum continuous output current achievable with the LP2975IMM-5.0/NOPB?
The LP2975IMM-5.0/NOPB does not define a maximum output current - it is a controller, not a regulator IC. Current capability depends entirely on the selected external P-FET, heatsinking, and input-output differential voltage. Reference designs demonstrate 6 A at 1.5 V (Design #3) and 5 A at 5 V (Design #1), with dropout as low as 141 mV. Thermal design must ensure the FET's junction temperature stays below 150°C under worst-case load and ambient conditions - the LP2975IMM-5.0/NOPB provides overtemperature protection but does not limit FET power dissipation.
Does the LP2975IMM-5.0/NOPB support reverse-voltage protection?
No, the LP2975IMM-5.0/NOPB does not provide reverse-voltage protection. Its absolute maximum rating for VIN is −0.3 V, and applying reverse polarity will damage the IC. Reverse protection must be implemented externally - typically using a series Schottky diode or ideal diode controller upstream of VIN. This limitation is inherent to its architecture as a gate driver/controller; protection functionality resides outside the LP2975IMM-5.0/NOPB and must be addressed at the system level.
How does the current-limit feature of the LP2975IMM-5.0/NOPB work?
The LP2975IMM-5.0/NOPB implements current limiting by monitoring voltage across an external sense resistor (RSC) placed between VIN and the P-FET source. When the voltage at the CL pin reaches 57 mV (typical), the controller reduces gate drive to limit output current. The trip threshold is highly accurate (±13 mV) and temperature-stable, enabling predictable short-circuit protection without significant additional dropout. RSC value is calculated as RSC = 57 mV / ISC, allowing precise setting of current limit - e.g., 10 mΩ yields 5.7 A limit. This feature is fully integrated and requires only one external component.
LP2975IMM-5.0/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
- Type:
- Positive Fixed
- Number of Outputs:
- 1
- Current - Supply:
- 180µA
- Voltage - Input:
- 1.8V ~ 24V
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
LP2975IMM-5.0/NOPB FAQ
1.How can I place an order for LP2975IMM-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2975IMM-5.0/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 LP2975IMM-5.0/NOPB reliable?
The price and inventory of LP2975IMM-5.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP2975IMM-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LP2975IMM-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2975IMM-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2975IMM-5.0/NOPB?
LP2975IMM-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2975IMM-5.0/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 LP2975IMM-5.0/NOPB?
For technical support, including LP2975IMM-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2975IMM-5.0/NOPB requirements.
6.How does Aetrix verify that LP2975IMM-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LP2975IMM-5.0/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 LP2975IMM-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LP2975IMM-5.0/NOPB?
All LP2975IMM-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP2975IMM-5.0/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 LP2975IMM-5.0/NOPB part is unused and in its original packaging.
Return procedure for LP2975IMM-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP2975IMM-5.0/NOPB Tags
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LT1575CS8#PBF
Analog Devices Inc.
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RT9008GE
Richtek USA Inc.
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S-816A40AMC-BAPT2U
ABLIC Inc.
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MIC5159YM6-TR
Microchip Technology
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MIC5156YM
Microchip Technology
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MIC5156-3.3YM
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MIC5158YM-TR
Microchip Technology
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MAX8564AEUB+
Analog Devices Inc./Maxim Integrated
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LT1573CS8#PBF
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UC2834DW
Texas Instruments
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RT9194GE
Richtek USA Inc.
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S-816A33AMC-BAIT2U
ABLIC Inc.
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