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Texas Instruments LMR24220TL/NOPB
- Part No.:
- LMR24220TL/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 28-WFBGA, DSBGA
- Datasheet:
-
LMR24220TL/NOPB.pdf
- Description:
- IC REG BUCK ADJ 2A 28DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,980
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Product details
Overview
LMR24220TL/NOPB from Texas Instruments is a 42-V input, 2-A synchronous step-down DC/DC regulator in a 28-bump DSBGA package (3.676 × 2.48 mm), delivering 0.8–24 V output with COT control architecture, integrated dual N-channel MOSFETs (RDS(ON) = 0.18 Ω / 0.11 Ω), and no loop compensation required - used in space-constrained industrial power meters and distributed power rails.
For engineers reviewing the LMR24220TL/NOPB datasheet, LMR24220TL/NOPB pinout, LMR24220TL/NOPB application, or LMR24220TL/NOPB equivalent, key selection considerations include its 4.5–42 V input range, 25 µA shutdown IQ, programmable soft start via external capacitor, ERM-enhanced COT stability with ceramic capacitors, and thermal shutdown at 165°C with 20°C hysteresis.
Technical Context
The LMR24220TL/NOPB implements a constant-on-time (COT) control scheme with valley-current limiting and ERM (Enhanced Ripple Mode) for stability without output capacitor ESR dependency - enabling robust operation with low-ESR ceramic capacitors. Its on-time is inversely proportional to input voltage and set by an external RON resistor, yielding near-constant switching frequency up to 1 MHz.
It integrates dual N-channel MOSFETs, a 6-V start-up regulator (65 mA current limit), internal 0.8-V feedback reference with ±2% tolerance over −40°C to +125°C, and protection features including output overvoltage lockout (0.92 V threshold), gate-drive UVLO (4.2 V), and thermal shutdown with automatic recovery at 145°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 42 V - supports direct connection to 12 V, 24 V, and 36 V industrial rails without pre-regulation. |
| Output Current | Up to 2 A continuous - limited by thermal derating; peak current limit set at 2.8 A for short-circuit protection. |
| Output Voltage Range | 0.8 V to 24 V - adjustable via external resistor divider; 0.8 V reference enables low-voltage core rail generation. |
| Switching Frequency | Programmable up to 1 MHz - set externally via RON; minimum on-time of 150 ns limits max frequency at high VIN. |
| Shutdown Quiescent Current | 25 µA typical - enables ultra-low-power standby in battery-backed or energy-harvesting systems. |
| Thermal Shutdown Threshold | 165°C with 20°C hysteresis - prevents permanent damage during overload or poor PCB thermal design. |
| Feedback Reference Voltage | 0.800 V ±2% (−40°C to +125°C) - defines output accuracy; FB pin bias current is only 5 nA, minimizing divider error. |
Pinout & Package
Package: 28-bump DSBGA (3.676 mm × 2.48 mm, 0.60 mm max height), bottom-soldered chip-scale package optimized for compact layouts and thermal performance on inner copper layers.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (A2,A3,B2,B3,C2,C3,D2,D3,D4) | Switching node | Internally connects main MOSFET source and sync MOSFET drain; must connect directly to power inductor with minimal trace inductance. |
| VIN (A4,B4) | Main input supply | Accepts 4.5–42 V; powers internal circuitry and gate drivers; requires local 10-µF ceramic input capacitor. |
| BST (C4) | Bootstrap capacitor connection | Connects 33-nF capacitor to SW; enables high-side N-MOSFET gate drive; critical for stable 100% duty cycle capability. |
| AGND (E3,E4,F1,F2,F3,G3) | Analog ground reference | Reference for FB, SS, EN, RON; must be isolated from PGND except at single-point star connection to avoid noise coupling. |
| SS (G2) | Soft-start control | 8-µA current source charges external capacitor; sets ramp time (e.g., 4.7 nF = 0.5 ms); grounded internally during fault conditions. |
| FB (G1) | Feedback input | Compares output voltage (via resistive divider) to 0.8-V internal reference; 5-nA bias current allows high-resistance dividers. |
| EN (G4) | Enable input | Active-high logic; >1.23 V enables device; open-circuit enables via internal pull-up; <1 V forces shutdown with 25 µA IQ. |
| RON (F4) | On-time programming | Resistor from VIN to RON sets main MOSFET on-time; determines switching frequency; min value constrained by 150 ns on-time limit. |
| VCC (E1,E2) | Start-up regulator output | 6-V regulated output (5–7.2 V); supplies internal bias; requires ≥680-nF capacitor to AGND for stability. |
| PGND (A1,B1,C1,D1) | Power ground return | Source connection of synchronous MOSFET; carries high di/dt currents; must tie directly to solid ground plane under IC. |
Key Features
| Feature | Design Value |
|---|---|
| No loop compensation required | Enables single-layer layout with minimal external components - eliminates compensation network design effort and instability risk. |
| COT with ERM architecture | Provides fast transient response (<10 µs load step recovery) and stable regulation using only ceramic output capacitors (no ESR dependency). |
| Integrated dual N-MOSFETs | Reduces BOM count and board area; achieves >90% efficiency at 3.3 V/2 A (VIN = 12 V) without external switches. |
| Programmable soft start | Prevents inrush current and output overshoot via user-selected capacitor; supports sequencing in multi-rail systems. |
| Stable with low-ESR capacitors | Eliminates need for tantalum or aluminum electrolytic capacitors - improves reliability and lifetime in harsh environments. |
Applications
| Industrial Power Meters | Point-of-Load Conversion |
|---|---|
Use Scenario: High-accuracy electricity metering in smart grid infrastructure requiring long-term reliability under wide temperature and input voltage variation. IC Role / Device Role / Timing Role: Primary 3.3-V or 5-V supply regulator for metrology SoC and isolation interface, operating from 24-V or 48-V distribution bus. Use Value: 42-V max input withstands line surges; 25 µA shutdown IQ extends battery backup runtime; DSBGA package minimizes footprint on crowded meter PCBs. | Use Scenario: Local voltage conversion for FPGA I/O banks or microcontroller peripherals in compact industrial controllers. IC Role / Device Role / Timing Role: Buck regulator generating 1.2-V or 1.8-V core voltage from 5-V or 12-V backplane rail, with tight load-transient response. Use Value: COT+ERM delivers <100-mV output deviation during 1-A load steps; integrated MOSFETs eliminate external switch losses and layout sensitivity. |
| Space-Constrained IoT Gateways | Distributed Industrial Power |
Use Scenario: Battery-powered edge gateway with cellular/Wi-Fi connectivity housed in sealed enclosure where thermal dissipation and board area are severely limited. IC Role / Device Role / Timing Role: Main 3.3-V system rail regulator powered from Li-ion or 12-V PoE-derived input, supporting sleep-mode current optimization. Use Value: 28-bump DSBGA occupies <9 mm²; 25 µA shutdown IQ enables multi-year battery life; no external compensation saves 3–4 passives per rail. | Use Scenario: Modular PLC I/O modules requiring independent, isolated 5-V or 12-V supplies per channel group from common 24-V chassis rail. IC Role / Device Role / Timing Role: Compact, self-contained buck converter per module, eliminating centralized PSUs and reducing wiring complexity. Use Value: Tiny solution size fits within 15-mm-wide DIN-rail modules; 42-V input handles 24-V transients per IEC 61000-4-5; thermal shutdown protects against blocked airflow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR23620DDA | 8-pin SO PowerPAD package; higher 36-V max input; 1.5-A rated; requires external compensation. | Better thermal performance in forced-air environments; less suitable for ultra-dense layouts due to larger footprint. | Select when board space permits and higher thermal margin is needed over DSBGA's compactness. |
| TPS54240DGQR | 16-pin WQFN; 40-V input; current-mode control; external MOSFETs required; 2-A capable. | Greater flexibility in inductor/MOSFET selection; higher component count; slower transient response than COT. | Choose when design requires adjustable frequency synchronization or discrete FET optimization for specific efficiency targets. |
Compared with LMR24220TL/NOPB, LMR23620DDA trades package size for thermal headroom and input voltage margin, while TPS54240DGQR offers control flexibility at the cost of layout complexity and transient performance - making LMR24220TL/NOPB optimal for space- and transient-critical industrial point-of-load designs.
Availability
LMR24220TL/NOPB is available at Aetrix Electronics and suitable for industrial power meters, space-constrained IoT gateways, and distributed PLC power modules requiring stable component supply across extended product lifecycles.
Supply support for LMR24220TL/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 LMR24220TL/NOPB belongs to TI's LMR series of integrated synchronous buck regulators, designed specifically for rugged, compact, and efficient point-of-load conversion in industrial automation, energy infrastructure, and factory equipment.
FAQ
What is the maximum input voltage rating for the LMR24220TL/NOPB?
The LMR24220TL/NOPB has an absolute maximum input voltage rating of 43.5 V, with recommended operation from 4.5 V to 42 V. Exceeding 42 V may trigger overvoltage protection or reduce reliability; sustained operation above 42 V is not advised. The device is commonly deployed from 24-V and 36-V industrial rails where transient spikes are managed externally.
Does the LMR24220TL/NOPB require external compensation components?
No, the LMR24220TL/NOPB does not require external compensation components. Its Constant-On-Time (COT) control architecture with Enhanced Ripple Mode (ERM) ensures stability using only ceramic output capacitors - eliminating the need for compensation resistors or capacitors and simplifying layout and validation.
How is the switching frequency programmed on the LMR24220TL/NOPB?
The switching frequency of the LMR24220TL/NOPB is programmed using an external resistor (RON) connected between VIN and the RON pin (F4). The on-time varies inversely with VIN, maintaining near-constant frequency; RON values from 12.4 kΩ to 49.9 kΩ yield typical frequencies of ~600 kHz to ~250 kHz. Minimum on-time (150 ns) constrains maximum frequency at high VIN.
What thermal protection features does the LMR24220TL/NOPB include?
The LMR24220TL/NOPB includes thermal shutdown that activates at 165°C (typical) and automatically recovers when junction temperature falls to 145°C (20°C hysteresis). During shutdown, the main MOSFET is disabled, the on-timer halted, and the SS pin grounded - preventing thermal runaway while allowing safe restart after cooling.
Can the LMR24220TL/NOPB operate with a 0.8-V output voltage?
Yes, the LMR24220TL/NOPB supports 0.8-V output voltage - its internal feedback reference is precisely 0.800 V (±2% over temperature). For VOUT = 0.8 V, the FB pin can be connected directly to the output with a ≥20-µA pre-load resistor to ensure minimum inductor ripple for stable regulation under no-load conditions.
LMR24220TL/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:
- 2A
- 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
LMR24220TL/NOPB FAQ
1.How can I place an order for LMR24220TL/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR24220TL/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 LMR24220TL/NOPB reliable?
The price and inventory of LMR24220TL/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR24220TL/NOPB is usually 5 days.
3.What payment methods are accepted for LMR24220TL/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR24220TL/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR24220TL/NOPB?
LMR24220TL/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR24220TL/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 LMR24220TL/NOPB?
For technical support, including LMR24220TL/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR24220TL/NOPB requirements.
6.How does Aetrix verify that LMR24220TL/NOPB is sourced from the original manufacturer or authorized distributors?
All LMR24220TL/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 LMR24220TL/NOPB meets industry standards.
7.What is the process for return or replacement of LMR24220TL/NOPB?
All LMR24220TL/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMR24220TL/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 LMR24220TL/NOPB part is unused and in its original packaging.
Return procedure for LMR24220TL/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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