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Texas Instruments LMR24210TLX/NOPB
- Part No.:
- LMR24210TLX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 28-WFBGA, DSBGA
- Datasheet:
-
LMR24210TLX/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1A 28DSBGA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LMR24210TLX/NOPB from Texas Instruments is a 42-V input, 1-A synchronous step-down DC/DC regulator in a 28-bump DSBGA package. It delivers regulated output voltages from 0.8 V to 24 V with up to 1 MHz switching frequency, integrated low-RDS(on) N-channel MOSFETs, and no loop compensation required-enabling compact, high-efficiency point-of-load conversion in space-constrained industrial power meters and distributed systems.
For engineers reviewing the LMR24210TLX/NOPB datasheet, LMR24210TLX/NOPB pinout, LMR24210TLX/NOPB application, or LMR24210TLX/NOPB equivalent, key selection considerations include its COT control with ERM architecture, 25 µA shutdown quiescent current, stable operation with ceramic output capacitors, programmable soft start via external capacitor, and thermal shutdown at 165°C with 20°C hysteresis.
Technical Context
The LMR24210TLX/NOPB employs Constant-On-Time (COT) regulation with an internal 0.8-V reference and valley-current limiting at 1.8 A. Its on-time is inversely proportional to input voltage and set by an external resistor (RON), enabling near-constant switching frequency across 4.5–42 V input range without requiring output capacitor ESR for stability.
It integrates dual N-channel MOSFETs with RDS(on) of 0.375 Ω (high-side) and 0.225 Ω (low-side), a 6-V start-up regulator (VCC) with 65-mA current limit, and zero-coil-current detection to enable efficient discontinuous conduction mode (DCM) at light loads. Protection includes VCC UVLO (3.75 V), FB overvoltage lockout (0.92 V), and thermal shutdown with automatic recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 42 V - supports wide industrial rails including 12 V, 24 V, and 36 V battery or bus inputs. |
| Output Voltage Range | 0.8 V to 24 V - adjustable via external resistive divider; 0.8-V feedback reference enables low-voltage core supply generation. |
| Max Output Current | 1 A continuous - rated for full load at ambient ≤90°C on typical PCB; derated above due to thermal limits. |
| Switching Frequency | Up to 1 MHz - externally programmable via RON; fixed minimum off-time of 260 ns ensures bootstrap capacitor recharge. |
| Shutdown Quiescent Current | 25 µA typical - enables ultra-low-power standby in always-on industrial monitoring systems. |
| Feedback Reference Voltage | 0.8 V ±2% over −40°C to +125°C - precise regulation basis for output accuracy and line/load transient performance. |
| Thermal Shutdown Threshold | 165°C typical with 20°C hysteresis - protects against sustained overload or poor heatsinking; resumes operation at ~145°C. |
Pinout & Package
LMR24210TLX/NOPB uses a 28-bump DSBGA package (3.676 mm × 2.48 mm, 0.4-mm pitch) optimized for minimal footprint and thermal performance in ultra-compact layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A2, A3, B2, B3, C2, C3, D2, D3, D4 | SW | Switching node - connects to inductor; carries high di/dt; requires tight layout and low-inductance path to minimize EMI. |
| A4, B4 | VIN | Main input supply - accepts 4.5–42 V; powers internal VCC regulator and gate drivers. |
| C4 | BST | Bootstrap capacitor connection - 33-nF capacitor between BST and SW supplies high-side gate drive voltage. |
| E3, E4, F1, F2, F3, G3 | AGND | Analog ground - reference for FB, SS, EN, RON; must be isolated from PGND except at single-point star connection. |
| G2 | SS | Soft-start control - 8-µA current source charges external capacitor; sets ramp time for controlled output voltage rise. |
| G1 | FB | Feedback input - senses output via resistor divider; 5-nA bias current minimizes divider error. |
| G4 | EN | Enable input - active-high; threshold 1.18 V typical; open-drain compatible; enables device when >1.23 V. |
| F4 | RON | On-time programming - resistor from VIN to RON sets switching frequency; minimum value constrained by 150-ns on-time limit. |
| E1, E2 | VCC | Start-up regulator output - 6-V, 65-mA regulated supply for internal circuitry; requires ≥680-nF bypass capacitor to AGND. |
| A1, B1, C1, D1 | PGND | Power ground - source of synchronous MOSFET; carries high pulsed current; must connect directly to solid ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| No loop compensation required | Enables immediate design implementation with only 5 external components (inductor, input/output caps, feedback divider), reducing BOM count and layout risk. |
| COT with ERM architecture | Delivers fast transient response (<10 µs recovery) and stable regulation with ceramic output capacitors down to 10 µF, eliminating ESR dependency. |
| Integrated synchronous MOSFETs | Reduces conduction losses at low output voltages (e.g., 1.2 V, 0.8 V); eliminates need for external catch diode and reduces thermal stress on PCB. |
| Programmable soft start | External capacitor (e.g., 4.7 nF → 0.5 ms ramp) prevents inrush current and output overshoot during power-up or hot-swap events. |
| Stable with low-ESR capacitors | Supports all-ceramic output networks - simplifies filtering, improves reliability, and avoids aging or temperature drift issues of polymer/aluminum electrolytics. |
Applications
| Industrial Power Meters | Point-of-Load Conversion |
|---|---|
|
Use Scenario: Metering ICs and isolation amplifiers in DIN-rail mounted electricity meters require clean, isolated 3.3-V or 5-V rails from 24-V or 42-V field bus. IC Role / Device Role / Timing Role: Primary buck regulator supplying isolated ADC, MCU, and communication interface (RS-485, PLC) subsystems. Use Value: 1-A capability and 42-V max input tolerate brownouts and surges on industrial buses; DSBGA package saves board area in sealed meter enclosures. |
Use Scenario: FPGA or microcontroller cores demand tightly regulated 0.8–1.2 V at up to 1 A from intermediate 5-V, 12-V, or 24-V system rails. IC Role / Device Role / Timing Role: High-efficiency, low-noise step-down converter delivering stable core voltage with fast load-step response. Use Value: COT control achieves <10 µs transient recovery; integrated MOSFETs eliminate external driver timing skew; 25 µA shutdown extends battery backup runtime. |
| Space-Constrained IoT Gateways | Distributed Industrial Power |
|
Use Scenario: Edge gateway modules integrating Wi-Fi/BLE radios, sensors, and real-time processors operate in compact plastic housings with limited airflow. IC Role / Device Role / Timing Role: Main system power regulator converting 12-V PoE or adapter input to 3.3-V logic and 1.8-V I/O rails. Use Value: Tiny DSBGA footprint (3.68 × 2.48 mm) and no compensation network reduce total solution size to <120 mm²; thermal shutdown prevents thermal runaway in sealed environments. |
Use Scenario: Programmable logic controllers (PLCs) distribute 5-V and 12-V rails to multiple I/O modules across backplane or fieldbus connections. IC Role / Device Role / Timing Role: Local DC/DC converter per module, stepping down 24-V backplane to isolated sensor/actuator supply. Use Value: 42-V input rating handles 24-V nominal with 100% tolerance for transients; stable operation with ceramic caps avoids capacitor replacement in long-life deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR23610ADDA | 36-V max input, SO PowerPAD™ package (6.5 × 5.5 mm), 1-MHz fixed frequency, requires external compensation. | Better thermal dissipation in high-ambient environments; larger footprint but easier soldering and thermal vias. | Select when board space allows larger package and thermal management prioritizes convection over miniaturization. |
| TPS54240DGQR | 40-V max input, MSOP-10 package, current-mode control, 100-kHz to 2.5-MHz adjustable frequency, external compensation required. | Higher frequency flexibility and better light-load efficiency via pulse-skipping; less immune to noise on FB pin than COT. | Select when design requires programmable frequency beyond 1 MHz or tighter light-load regulation under dynamic duty cycling. |
Compared with LMR24210TLX/NOPB, LMR23610ADDA offers superior thermal handling in high-power density designs but sacrifices footprint efficiency, while TPS54240DGQR provides broader frequency tuning and pulse-skipping benefits at the cost of added compensation complexity and reduced noise immunity on the feedback path.
Availability
LMR24210TLX/NOPB is available at Aetrix Electronics and suitable for industrial power meters, space-constrained IoT gateways, and distributed PLC I/O modules requiring stable component supply, long lifecycle support, and consistent parametric performance across production batches.
Supply support for LMR24210TLX/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 technologies, with decades of expertise in high-reliability industrial and automotive power solutions.
The LMR24210TLX/NOPB belongs to TI's LMR family of monolithic synchronous buck regulators, designed specifically for rugged, compact, and easy-to-implement DC/DC conversion in industrial automation, energy infrastructure, and factory equipment where input voltage range, thermal robustness, and minimal external components are critical.
FAQ
What is the maximum input voltage supported by the LMR24210TLX/NOPB?
The LMR24210TLX/NOPB supports a maximum input voltage of 42 V, with absolute maximum rating at 43.5 V. This enables reliable operation from 24-V industrial buses, 36-V battery systems, and unregulated AC/DC adapters with transient headroom. Operation above 42 V risks permanent damage, and the device includes VCC undervoltage lockout and thermal shutdown to prevent fault propagation.
Does the LMR24210TLX/NOPB require external compensation components?
No, the LMR24210TLX/NOPB does not require external compensation components. Its Constant-On-Time (COT) control architecture with ERM eliminates the need for loop compensation, allowing stable operation with only five external components: input capacitor, output capacitor, inductor, feedback divider, and soft-start capacitor. This simplifies design, reduces BOM count, and improves reliability versus traditional voltage-mode or current-mode regulators.
Can the LMR24210TLX/NOPB operate with all-ceramic output capacitors?
Yes, the LMR24210TLX/NOPB is explicitly designed to operate stably with low-ESR ceramic output capacitors - including X5R and X7R types - without requiring series resistance. Unlike many COT regulators, it does not depend on output capacitor ESR for loop stability. Typical designs use 10–47 µF ceramic capacitors, enabling smaller footprints, longer lifetimes, and improved temperature stability compared to electrolytic or polymer alternatives.
How is the switching frequency programmed on the LMR24210TLX/NOPB?
The switching frequency of the LMR24210TLX/NOPB is programmed using an external resistor (RON) connected between the VIN and RON pins. The on-time varies inversely with input voltage, yielding nearly constant frequency across the 4.5–42 V input range. For example, a 12.4-kΩ resistor sets ~500 kHz at 12 V input. Minimum on-time is 150 ns, limiting maximum frequency; Equation 2 in the datasheet provides exact calculation based on VIN and desired fSW.
What protection features are integrated into the LMR24210TLX/NOPB?
The LMR24210TLX/NOPB integrates six key protections: (1) VCC undervoltage lockout (3.75 V threshold), (2) output overvoltage protection (0.92 V FB threshold), (3) thermal shutdown (165°C trip, 20°C hysteresis), (4) gate-drive undervoltage lockout (4 V BST–SW), (5) valley-current limiting (1.8 A typical), and (6) input overvoltage clamp (43.5 V absolute max). These operate autonomously without external circuitry, ensuring safe startup, fault recovery, and long-term reliability in harsh industrial environments.
LMR24210TLX/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):
- 24V
- Current - Output:
- 1A
- 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
LMR24210TLX/NOPB FAQ
1.How can I place an order for LMR24210TLX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR24210TLX/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 LMR24210TLX/NOPB reliable?
The price and inventory of LMR24210TLX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR24210TLX/NOPB is usually 5 days.
3.What payment methods are accepted for LMR24210TLX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR24210TLX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR24210TLX/NOPB?
LMR24210TLX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR24210TLX/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 LMR24210TLX/NOPB?
For technical support, including LMR24210TLX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR24210TLX/NOPB requirements.
6.How does Aetrix verify that LMR24210TLX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMR24210TLX/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 LMR24210TLX/NOPB meets industry standards.
7.What is the process for return or replacement of LMR24210TLX/NOPB?
All LMR24210TLX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMR24210TLX/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 LMR24210TLX/NOPB part is unused and in its original packaging.
Return procedure for LMR24210TLX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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