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Texas Instruments LM3102TL-1/NOPB
- Part No.:
- LM3102TL-1/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 28-WFBGA, DSBGA
- Datasheet:
-
LM3102TL-1/NOPB.pdf
- Description:
- IC REG BUCK ADJ 2.5A 28DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,061
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Product details
Overview
LM3102TL-1/NOPB from Texas Instruments is a synchronous step-down DC-DC regulator with integrated dual N-channel MOSFETs, delivering up to 2.5 A output current across 4.5 V–42 V input range, featuring 0.8 V ±1.5% internal reference, valley current limit at 2.7 A, and thermally enhanced HTSSOP-20 package - used in automotive telematics and industrial point-of-load power conversion.
For engineers reviewing the LM3102TL-1/NOPB datasheet, LM3102TL-1/NOPB pinout, LM3102TL-1/NOPB application, or LM3102TL-1/NOPB equivalent, key selection considerations include its Constant ON-Time (COT) control architecture, ceramic-capacitor compatibility without ESR dependency, programmable switching frequency up to 1 MHz, prebias start-up capability, and thermal shutdown at 165°C.
Technical Context
The LM3102TL-1/NOPB implements a Constant ON-Time (COT) regulation scheme using an internal 0.8 V reference and comparator-driven one-shot timer, where ON-time is inversely proportional to input voltage and set by external RON resistor - enabling near-constant switching frequency across line variations. It operates in both continuous conduction mode (CCM) and discontinuous conduction mode (DCM), with automatic DCM entry at light loads for improved efficiency.
Valley current limiting detects re-circulating current through the synchronous MOSFET during OFF-time, triggering at 2.7 A to inhibit next ON-pulse until current falls below threshold. Protection includes output overvoltage detection at 0.92 V on FB pin, VCC undervoltage lockout at 3.75 V, gate drive UVLO, and thermal shutdown with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 42 V - supports direct conversion from 2–4-cell Li-ion batteries and industrial 24-VAC/DC rails. |
| Output Current | 2.5 A continuous - sustained under thermal derating conditions with ≥40 cm² 2-oz copper ground plane. |
| Reference Voltage | 0.8 V ±1.5% - sets minimum adjustable output voltage and defines feedback regulation threshold. |
| Switching Frequency | Up to 1 MHz - programmable via RON resistor; enables compact magnetics and high transient response. |
| Main MOSFET RDS(on) | 0.18 Ω (typ) - reduces conduction loss at full load; specified over full junction temperature range. |
| Synchronous MOSFET RDS(on) | 0.11 Ω (typ) - minimizes reverse conduction loss and improves light-load efficiency in DCM. |
| Current Limit Threshold | 2.7 A valley current limit - protects against overload and short-circuit by disabling ON-time initiation. |
| Thermal Shutdown | 165°C activation with 20°C hysteresis - forces reset and prevents permanent junction damage. |
Pinout & Package
LM3102TL-1/NOPB is housed in a thermally enhanced HTSSOP-20 (PWP) package measuring 6.50 mm × 4.40 mm with exposed thermal pad (EP). The package supports high-power dissipation in space-constrained industrial and automotive applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power Input | Primary DC input supply (4.5–42 V); powers internal startup regulator and main switch. |
| BST | Bootstrap Supply | Connects external bootstrap capacitor to enable high-side N-MOSFET gate drive above VIN. |
| SW | Switching Node | Drain connection of main MOSFET and source of synchronous MOSFET; connects to inductor. |
| AGND | Analog Ground | Reference ground for feedback, soft-start, enable, and ON-time control circuits; separate from PGND. |
| SS | Soft-Start | Internal 8 µA current source charges external capacitor to ramp output voltage and limit inrush. |
| FB | Feedback Input | Monitors output via resistive divider; compared to 0.8 V reference to regulate output voltage. |
| EN | Enable Control | Active-high logic input; pulls low (<1 V) to disable regulator and ground SS pin internally. |
| RON | ON-Time Programming | Resistor-connected pin setting ON-time duration and thus switching frequency (up to 1 MHz). |
| VCC | Startup Regulator Output | 6 V regulated output (65 mA current-limited) powering internal gate drivers and control circuitry. |
| PGND | Power Ground | High-current return path for synchronous MOSFET and inductor; must be low-inductance connection. |
Key Features
| Feature | Design Value |
|---|---|
| No loop compensation required | COT control eliminates need for external compensation network - simplifies design and improves transient response. |
| Stable with ceramic capacitors | Does not rely on output capacitor ESR for stability - enables use of low-profile, high-reliability ceramic output caps. |
| Prebias start-up | Allows safe start-up into precharged output rail without reverse current flow or output voltage overshoot. |
| Ultra-fast transient response | Sub-microsecond ON-time adjustment and COT architecture deliver <10 µs recovery from 2.5 A load steps. |
| Programmable soft-start | External capacitor on SS pin controls output ramp rate - prevents inrush current and system brownout. |
| Output overvoltage protection | 0.92 V FB threshold triggers immediate ON-time termination - protects downstream circuitry during fault conditions. |
Applications
| Automotive Telematics | Industrial Point-of-Load |
|---|---|
|
Use Scenario: Powering GPS modules, cellular modems, and CAN interface ICs in vehicle infotainment systems with wide-input 12/24-V battery rails. IC Role / Device Role / Timing Role: Primary buck regulator converting unregulated automotive battery voltage to stable 3.3 V or 5 V for digital subsystems. Use Value: Withstands cold-crank transients down to 4.5 V and load-dump surges up to 42 V while maintaining regulation. |
Use Scenario: Generating local 1.2 V or 1.8 V supplies for FPGAs and microcontrollers in PLC backplanes and motor drives. IC Role / Device Role / Timing Role: High-efficiency, thermally robust DC-DC converter placed close to load to minimize IR drop and noise coupling. Use Value: Delivers 2.5 A at >90% efficiency across 4.5–42 V input, reducing board-level heat and eliminating need for heatsinks. |
| Embedded Systems | Storage Systems |
|
Use Scenario: Providing clean, regulated 3.3 V for ARM-based edge AI processors and sensor fusion hubs in ruggedized IoT gateways. IC Role / Device Role / Timing Role: Main system power rail regulator supporting dynamic voltage scaling and low-quiescent operation. Use Value: DCM operation at light loads achieves <30 µA quiescent current, extending battery life in always-on monitoring nodes. |
Use Scenario: Supplying 5 V or 12 V to SATA SSD controllers and NVMe power management ICs in enterprise storage enclosures. IC Role / Device Role / Timing Role: Secondary buck stage stepping down intermediate 12 V bus to precise 5 V/3.3 V rails with fast transient immunity. Use Value: Ultra-fast transient response prevents data corruption during burst read/write operations with sudden current demand spikes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3102TLX-1/NOPB | Same die, DSBGA-28 package; lower 1.5 A current rating due to thermal limits in chip-scale form factor. | Used where ultra-low profile (<0.6 mm height) and PCB area savings outweigh current requirement. | Select when board thickness is constrained and output current ≤1.5 A suffices. |
| LM5115MH/NOPB | External MOSFET controller (no integrated FETs); supports >10 A with custom layout; requires loop compensation. | Targeted at higher-power industrial supplies where efficiency optimization and thermal partitioning are critical. | Choose when >2.5 A output or >95% peak efficiency at 12 V–48 V input is required. |
Compared with LM3102TLX-1/NOPB, the LM3102TL-1/NOPB delivers 67% higher output current in the same family architecture but requires larger HTSSOP-20 footprint; versus LM5115MH/NOPB, it trades design flexibility and scalability for reduced BOM count and faster time-to-market in sub-3-A applications.
Availability
LM3102TL-1/NOPB is available at Aetrix Electronics and suitable for automotive telematics, industrial point-of-load regulators, and embedded system power supplies requiring stable component supply, long-term lifecycle support, and TI-qualified automotive-grade reliability.
Supply support for LM3102TL-1/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 power management solutions for industrial, automotive, and communications markets.
The LM3102 product line delivers highly integrated synchronous buck regulators targeting space-constrained, wide-input industrial and automotive power conversion - emphasizing simplicity, reliability, and thermal resilience without external compensation.
FAQ
What is the maximum input voltage supported by the LM3102TL-1/NOPB?
The LM3102TL-1/NOPB supports a maximum input voltage of 42 V, verified per Absolute Maximum Ratings in the official datasheet. This allows direct integration into 24-VAC/DC industrial systems and automotive battery rails including load-dump conditions. Operation above 42 V risks permanent damage, and the device includes VCC undervoltage lockout to prevent startup below 4.5 V.
Does the LM3102TL-1/NOPB require external compensation components?
No, the LM3102TL-1/NOPB uses a Constant ON-Time (COT) control architecture that eliminates the need for external compensation networks. Its stability is inherently independent of output capacitor ESR, enabling reliable operation with ceramic capacitors. This simplifies layout, reduces BOM count, and ensures consistent transient performance across temperature and aging.
What is the purpose of the RON pin on the LM3102TL-1/NOPB?
The RON pin on the LM3102TL-1/NOPB sets the ON-time duration of the main MOSFET via an external resistor, directly determining the switching frequency - up to 1 MHz. The relationship is defined as ton = (1.3×10⁻¹⁰ × RON)/VIN, ensuring near-constant frequency across input voltage variations. RON must be selected so ton remains ≥150 ns at maximum VIN to avoid frequency collapse.
How does the LM3102TL-1/NOPB handle thermal overload conditions?
The LM3102TL-1/NOPB incorporates a thermal shutdown circuit that activates at 165°C junction temperature, disabling the main MOSFET, grounding the SS pin, and halting switching. After cooldown to ~145°C (20°C hysteresis), normal operation resumes automatically. Thermal derating curves confirm 2.5 A output is sustainable below 100°C ambient with ≥40 cm² 2-oz copper ground plane.
Can the LM3102TL-1/NOPB start up into a prebiased output voltage?
Yes, the LM3102TL-1/NOPB supports prebias start-up, allowing safe turn-on when the output rail is already charged - common in hot-swap or multi-rail systems. During prebias start-up, the synchronous MOSFET remains off until the FB voltage drops below 0.8 V, preventing reverse current flow and avoiding output voltage overshoot or instability that could damage downstream components.
LM3102TL-1/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 28-WFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 7V
- Current - Output:
- 2.5A
- Frequency - Switching:
- Up to 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-DSBGA
LM3102TL-1/NOPB FAQ
1.How can I place an order for LM3102TL-1/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3102TL-1/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 LM3102TL-1/NOPB reliable?
The price and inventory of LM3102TL-1/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3102TL-1/NOPB is usually 5 days.
3.What payment methods are accepted for LM3102TL-1/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3102TL-1/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3102TL-1/NOPB?
LM3102TL-1/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3102TL-1/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 LM3102TL-1/NOPB?
For technical support, including LM3102TL-1/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3102TL-1/NOPB requirements.
6.How does Aetrix verify that LM3102TL-1/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3102TL-1/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 LM3102TL-1/NOPB meets industry standards.
7.What is the process for return or replacement of LM3102TL-1/NOPB?
All LM3102TL-1/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3102TL-1/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 LM3102TL-1/NOPB part is unused and in its original packaging.
Return procedure for LM3102TL-1/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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