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Texas Instruments LMR24220TLX/NOPB
- Part No.:
- LMR24220TLX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 28-WFBGA, DSBGA
- Datasheet:
-
LMR24220TLX/NOPB.pdf
- Description:
- IC REG BUCK ADJ 2A 28DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,880
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Product details
Overview
LMR24220TLX/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 regulated output voltages from 0.8 V to 24 V with COT control architecture, integrated dual N-channel MOSFETs (RDS(ON) = 0.375 Ω / 0.225 Ω), and no loop compensation required - deployed in space-constrained industrial power meters and distributed power rails.
For engineers reviewing the LMR24220TLX/NOPB datasheet, LMR24220TLX/NOPB pinout, LMR24220TLX/NOPB application, or LMR24220TLX/NOPB equivalent, key selection criteria 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 LMR24220TLX/NOPB implements a constant-on-time (COT) control scheme with Enhanced Ripple Mode (ERM), eliminating reliance on output capacitor ESR for stability and enabling fast transient response with ceramic output capacitors. Its on-time is inversely proportional to input voltage and set by an external resistor (RON), yielding near-constant switching frequency up to 1 MHz.
It integrates dual N-channel MOSFETs with valley-current limiting (2.8 A typical), gate-drive UVLO (4.2 V), VCC startup regulator (6 V ±1.2 V, 65 mA current limit), and zero-coil-current detection to enable efficient discontinuous conduction mode (DCM) operation at light loads - all within a thermally optimized DSBGA package with θJA = 50°C/W.
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 | 2 A continuous - rated for sustained load delivery under thermal derating constraints (TJ ≤ 125°C). |
| Output Voltage Range | 0.8 V to 24 V - set externally via FB resistive divider; 0.8 V reference enables low-voltage core supply generation. |
| Switching Frequency | Up to 1 MHz - programmable via RON resistor; fixed minimum off-time (260 ns) ensures bootstrap capacitor recharge. |
| Shutdown Quiescent Current | 25 µA typical - enables ultra-low-power standby in battery-backed or energy-sensitive systems. |
| Thermal Shutdown Threshold | 165°C with 20°C hysteresis - protects against sustained overload or poor PCB thermal design. |
| VCC Regulator Output | 6.0 V ±1.2 V, 65 mA current-limited - powers internal gate drivers and control logic; requires ≥680 nF bypass capacitor. |
Pinout & Package
Package: 28-bump DSBGA (3.676 mm × 2.48 mm, 0.60 mm max height), bottom-soldered chip-scale package requiring microvia or solder-mask-defined pads per JEDEC MO-277.
| 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; supplies VCC regulator and high-side gate driver; requires local 10 µF ceramic input capacitor. |
| BST (C4) | Bootstrap capacitor connection | Connects 33 nF capacitor to SW; enables floating gate drive for high-side N-MOSFET; critical for reliable turn-on. |
| AGND (E3,E4,F1,F2,F3,G3) | Analog ground reference | Reference for FB, SS, EN, RON, and internal comparators; must be isolated from PGND except at single-point star ground. |
| SS (G2) | Soft-start timing node | 8 µA internal current source charges external capacitor; controls output ramp rate (e.g., 4.7 nF → 0.5 ms rise time). |
| FB (G1) | Feedback input | 0.8 V internal reference; connects to resistive divider; 5 nA bias current enables high-impedance feedback networks. |
| EN (G4) | Enable control | Active-high; >1.23 V enables regulation; open-circuit enables device via internal pull-up; <1 V forces shutdown. |
| RON (F4) | On-time programming | Resistor from VIN to RON sets main MOSFET on-time; determines operating frequency and minimum duty cycle. |
| VCC (E1,E2) | Internal bias supply | 6 V regulated output; powers gate drivers and control circuitry; requires ≥680 nF AGND bypass 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. |
Key Features
| Feature | Design Value |
|---|---|
| No loop compensation required | Enables single-layer PCB layout with minimal external components - eliminates compensation network design effort and tuning. |
| Stable with ceramic output capacitors | Removes dependency on capacitor ESR, allowing use of low-profile, high-reliability X7R/X5R MLCCs instead of bulkier tantalum or aluminum electrolytics. |
| Programmable soft start | Prevents inrush current and output overshoot during power-up; configurable timing (e.g., 0.5–1.8 ms) via external SS capacitor value. |
| Integrated synchronous MOSFETs | Reduces BOM count and board area; eliminates need for external sync rectifier and associated gate drive circuitry. |
| COT with ERM architecture | Delivers consistent transient response across line/load variations while maintaining stable operation down to zero load current. |
Applications
| Industrial Power Meters | Point-of-Load Conversion |
|---|---|
Use Scenario: Metering ICs and isolation interfaces require tightly regulated 3.3 V or 5 V rails from 24 V or 36 V distribution buses in smart grid endpoints. IC Role / Device Role / Timing Role: Primary buck regulator supplying isolated ADC, RF transceiver, and real-time clock subsystems with <±1% output accuracy. Use Value: DSBGA footprint minimizes PCB area in sealed meter enclosures; 42 V input withstands surges per IEC 61000-4-5; 25 µA shutdown IQ extends battery backup runtime. | Use Scenario: FPGA I/O banks or microcontroller peripherals demand localized 1.2 V, 1.8 V, or 3.3 V supplies derived from 5 V, 12 V, or 24 V system rails. IC Role / Device Role / Timing Role: Compact, self-contained DC/DC converter replacing discrete buck controllers + external MOSFETs in embedded compute modules. Use Value: Integrated MOSFETs reduce component count by ≥4; COT control delivers <50 µs load-step response; no compensation simplifies layout validation. |
| Space-Constrained IoT Gateways | Distributed Industrial Control |
Use Scenario: Wireless gateway modules integrate cellular, Wi-Fi, and sensor interfaces in compact enclosures where board space is limited to <100 mm² per rail. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator powering RF front-end and baseband processors from 12 V intermediate bus. Use Value: 3.676 × 2.48 mm DSBGA package occupies <9 mm²; 90% peak efficiency at 1 A reduces thermal load; soft-start prevents brownout during multi-rail sequencing. | Use Scenario: PLC I/O modules and motor drive auxiliary supplies derive 5 V or 15 V from 24 V field buses in harsh factory environments. IC Role / Device Role / Timing Role: Robust primary regulator supporting analog signal conditioning, digital isolators, and communication PHYs. Use Value: 42 V absolute max input handles 48 V transients; thermal shutdown (165°C) and overvoltage protection (0.92 V FB threshold) ensure fault resilience; PGND/AGND separation improves noise immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR23620SDDAR | SO-8 package (5 × 6 mm), higher RDS(ON) (0.12 Ω / 0.07 Ω), 36 V max input, 2.5 A current rating | Requires larger PCB area but offers better thermal dissipation and easier hand-soldering | Select when thermal margin >20°C is needed or DSBGA assembly capability is unavailable. |
| TPS54240DGQR | MSOP-10 package, current-mode control, 40 V max input, 2 A rating, external MOSFETs required | Greater design flexibility but adds ≥6 components and compensation complexity | Select when adjustable frequency (100 kHz–2.5 MHz) or external FET selection (e.g., for >100 V operation) is mandatory. |
Compared with LMR24220TLX/NOPB, LMR23620SDDAR trades miniaturization for thermal headroom and manufacturability, while TPS54240DGQR sacrifices integration and simplicity for control-loop tunability and voltage scalability - making LMR24220TLX/NOPB optimal for size- and BOM-constrained 42 V industrial buck applications.
Availability
LMR24220TLX/NOPB is available at Aetrix Electronics and suitable for industrial power meters, point-of-load conversions from 12-V/24-V rails, and space-constrained IoT gateways requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LMR24220TLX/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 company headquartered in Dallas, Texas, designing and manufacturing analog, embedded processing, and logic ICs for industrial, automotive, and communications markets.
The LMR24220TLX/NOPB belongs to TI's LMR family of integrated synchronous buck regulators, engineered specifically for high-input-voltage industrial power conversion where small size, wide VIN range, and robust protection are essential.
FAQ
What is the maximum input voltage rating for the LMR24220TLX/NOPB?
The LMR24220TLX/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 degrade reliability; operation above 43.5 V risks permanent damage per Absolute Maximum Ratings (Section 6.1 of SNVS737F).
Does the LMR24220TLX/NOPB require external compensation components?
No, the LMR24220TLX/NOPB uses a constant-on-time (COT) control architecture with Enhanced Ripple Mode (ERM), eliminating the need for external compensation components. Its stability is inherently maintained with low-ESR ceramic output capacitors, simplifying design and reducing bill-of-materials count.
How is the switching frequency programmed on the LMR24220TLX/NOPB?
The switching frequency of the LMR24220TLX/NOPB is set by an external resistor (RON) connected between VIN and the RON pin. The on-time varies inversely with VIN, yielding near-constant frequency; for example, a 12.4 kΩ resistor yields ~600 kHz at VIN = 10 V. Minimum on-time (150 ns) limits maximum frequency to ~1 MHz.
What thermal protection features does the LMR24220TLX/NOPB include?
The LMR24220TLX/NOPB incorporates thermal shutdown at 165°C (typical) with 20°C hysteresis, disabling the main MOSFET and grounding the SS pin until junction temperature falls below 145°C. This prevents catastrophic failure during overload or inadequate heatsinking in the 28-bump DSBGA package.
Can the LMR24220TLX/NOPB operate with a 0.8 V output voltage?
Yes, the LMR24220TLX/NOPB supports output voltages as low as 0.8 V using the FB pin's internal 0.8 V reference. For VOUT = 0.8 V, connect FB directly to the output with a ≥20 µA pre-load resistor to ensure sufficient inductor current ripple for stable regulation in no-load conditions.
LMR24220TLX/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
LMR24220TLX/NOPB FAQ
1.How can I place an order for LMR24220TLX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR24220TLX/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 LMR24220TLX/NOPB reliable?
The price and inventory of LMR24220TLX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR24220TLX/NOPB is usually 5 days.
3.What payment methods are accepted for LMR24220TLX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR24220TLX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR24220TLX/NOPB?
LMR24220TLX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR24220TLX/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 LMR24220TLX/NOPB?
For technical support, including LMR24220TLX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR24220TLX/NOPB requirements.
6.How does Aetrix verify that LMR24220TLX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMR24220TLX/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 LMR24220TLX/NOPB meets industry standards.
7.What is the process for return or replacement of LMR24220TLX/NOPB?
All LMR24220TLX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMR24220TLX/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 LMR24220TLX/NOPB part is unused and in its original packaging.
Return procedure for LMR24220TLX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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