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Texas Instruments LM60440ARPKR
- Part No.:
- LM60440ARPKR
- Manufacturer:
- Texas Instruments
- Package:
- 13-PowerWFQFN
- Datasheet:
-
LM60440ARPKR.pdf
- Description:
- IC REG BUCK ADJ 4A 13WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,369
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Product details
Overview
LM60440ARPKR from Texas Instruments is a 3.8-V to 36-V, 4-A synchronous step-down DC/DC converter in a 3.0 mm × 2.0 mm WQFN-13 package with wettable flanks. It delivers peak efficiency >95%, supports 400 kHz fixed-frequency PWM and PFM light-load operation, and integrates power-good (PG), enable (EN), and internal 5-V LDO (VCC) for industrial power rails in servo drives and PLCs.
For engineers reviewing the LM60440ARPKR datasheet, LM60440ARPKR pinout, LM60440ARPKR application, or LM60440ARPKR equivalent, key selection criteria include its 4-A rated output, ultra-small thermal-pad QFN footprint, 25 µA quiescent current, ±1% FB reference accuracy, and functional safety documentation support - all critical for rugged 24-V industrial power designs.
Technical Context
The LM60440ARPKR uses peak-current-mode control with automatic PFM/PWM transition to maintain >90% efficiency at 10 mA (12 VIN/5 VOUT) and full-load regulation across –40°C to +150°C junction temperature. Its integrated high-side (76–146 mΩ) and low-side (51–96 mΩ) MOSFETs eliminate external switches while supporting adjustable output from 1 V to 24 V via resistor divider on FB.
Designed for low EMI, it features symmetrical VIN/PGND pin layout to cancel magnetic fields, minimized switch-node ringing via enhanced QFN parasitics, and meets CISPR-22 Class 5 emissions standards. The BOOT-to-SW bootstrap circuit, internal soft-start (2.9–6 ms), and hiccup-mode short-circuit protection (94-ms off-time) ensure robust startup and fault recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.8 V to 36 V - supports wide industrial input rails including 12 V, 24 V, and 36 V battery/supply systems without pre-regulation. |
| Output Current | 4 A continuous - delivers full-rated load at 150°C junction temperature with proper PCB thermal design. |
| Switching Frequency | 400 kHz (fixed) - balances efficiency, size, and EMI; enables compact 1–2.2 µH inductors and reduces filter component count. |
| Feedback Reference | 1.0 V ±1.5% - enables precise output voltage setting from 1 V to 24 V using standard resistor tolerances. |
| Quiescent Current | 25 µA - sustains >90% efficiency at 10-mA load (12 VIN/5 VOUT), critical for always-on industrial sensors and controllers. |
| Thermal Resistance | RθJA = 54°C/W - achievable with 4-layer JEDEC board; DAP pad must be soldered to ≥4 thermal vias for production thermal performance. |
| Protection Features | Hiccup-mode short-circuit, thermal shutdown (165°C), UVLO on VCC, and PG flag with 60–170 µs glitch filter - enables autonomous fault handling without external supervision. |
Pinout & Package
LM60440ARPKR is housed in a 3.00 mm × 2.00 mm WQFN-13 package with wettable flanks and an exposed thermal pad (DAP) that must be soldered to system ground for thermal and electrical integrity. The package supports automated optical inspection (AOI) and provides low-inductance switching paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 11 | PGND | Power ground return for high-current switching path; must connect directly to DAP and AGND with short, wide traces to minimize noise coupling. |
| 2, 10 | VIN | Main input supply (3.8–36 V); requires local 10-µF ceramic capacitor to PGND to suppress high-frequency ripple and EMI. |
| 3, 12 | SW | Switch node connecting internal HS/LS FETs to external inductor; high dv/dt node requiring minimal trace area and guard ring isolation. |
| 4 | BOOT | Bootstrap supply for HS gate driver; requires 100-nF ceramic capacitor between BOOT and SW to sustain gate drive during 100% duty cycle. |
| 5 | VCC | Internal 5-V LDO output; powers control circuitry and can source logic-level PG pull-up; must bypass with 1-µF ceramic to AGND. |
| 6 | AGND | Analog ground reference for FB, EN, PG; connects to system ground but separated from PGND at single-point star ground to avoid noise injection. |
| 7 | FB | Resistor-divider feedback input; senses output voltage with 1-V reference; sensitive node requiring short, shielded routing away from SW/VIN. |
| 8 | PG | Open-drain power-good flag; asserts high when VOUT is within ±3% of target (90–110% FB); requires external pull-up resistor to VCC or VOUT. |
| 9 | EN | Enable input with 1.231-V threshold; rising edge initiates soft-start; can be tied to VIN for always-on operation or driven by microcontroller GPIO. |
| 13 | DAP | Exposed thermal pad; low-impedance connection to PGND; mandatory for thermal dissipation and EMI reduction; requires ≥4 thermal vias to inner ground planes. |
Key Features
| Feature | Design Value |
|---|---|
| Functional Safety Documentation Support | TI provides FIT data, failure mode analysis, and safety manual - enabling IEC 61508 SIL-2 system-level certification for industrial safety PLCs. |
| CISPR-22 Class 5 EMI Compliance | Validated with standard 4-layer PCB layout; eliminates need for external EMI filters in medical and factory automation equipment. |
| Ultra-Small 3.0 mm × 2.0 mm Footprint | Reduces total solution size to <100 mm² - fits into space-constrained servo drive modules and portable instrumentation enclosures. |
| Integrated Power-Good Flag with Glitch Filter | 60–170 µs hardware debounce prevents false resets during transient load steps - ensures reliable microprocessor boot sequencing. |
| Peak-Current-Mode Control with Auto PFM/PWM | Eliminates external compensation components and maintains >90% efficiency from 10 mA to 4 A - simplifies design across dynamic loads. |
Applications
| Industrial PLC Power Rail | Servo Drive Auxiliary Supply |
|---|---|
|
Use Scenario: Provides stable 5-V or 3.3-V bias for CPU, FPGA, and I/O interface circuits inside programmable logic controllers operating from 24-V DC bus. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator delivering regulated rail with tight line/load regulation (±1.6%) and fast transient response (<10 µs). Use Value: Enables single-stage conversion from 24 V to 5 V with >95% peak efficiency - reducing heat sink requirements and improving system MTBF. |
Use Scenario: Generates isolated gate-driver supply (15 V) and logic rail (5 V) in AC servo inverters using transformer-coupled auxiliary winding. IC Role / Device Role / Timing Role: Secondary-side synchronous buck converting rectified auxiliary winding output to clean, low-noise logic voltage. Use Value: Wettable flanks and DAP thermal pad allow conduction cooling in sealed motor control enclosures - eliminating forced-air fans. |
| Medical Diagnostic Imaging Module | Factory Automation Sensor Hub |
|
Use Scenario: Powers analog front-end (AFE), ADC, and low-noise op-amps in portable ultrasound or X-ray detector subsystems. IC Role / Device Role / Timing Role: Low-EMI, low-quiescent-current buck supplying precision analog rails with <10 mVpp ripple at 400 kHz switching. Use Value: Meets CISPR-22 Class 5 without shielding - critical for FDA-compliant Class II medical devices with strict emissions limits. |
Use Scenario: Supplies 3.3-V rail to multiple CAN transceivers, IO-Link masters, and microcontrollers in distributed sensor nodes on production lines. IC Role / Device Role / Timing Role: High-reliability point-of-load regulator supporting extended temperature operation (–40°C to +150°C) and brownout immunity. Use Value: 25 µA IQ and hiccup-mode protection prevent latch-up during cable fault events - ensuring uninterrupted fieldbus communication. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM60430ARPKR | 3-A rated output, identical 3.0 mm × 2.0 mm WQFN-13 package and pinout, same 400 kHz frequency and 1-V FB reference. | Lower current capability suits cost-sensitive 3-A applications where headroom is not required; shares same layout and BOM except inductor/capacitor ratings. | Select when full 4-A capability is unnecessary - reduces thermal design complexity and enables smaller magnetics. |
| TPS54340DDAR | 3-A buck with 3.5–42 V input, SOIC-8 package, no integrated PG flag, higher 115 µA IQ, and external compensation required. | Larger footprint and lower integration limit use in ultra-compact modules; lacks functional safety documentation and wettable flanks for AOI. | Choose only if legacy SOIC-8 layout reuse is mandatory; otherwise LM60440ARPKR offers superior density, efficiency, and manufacturability. |
Compared with LM60430ARPKR, the LM60440ARPKR provides 33% higher current in identical footprint and thermal performance, while TPS54340DDAR trades integration and EMI performance for package compatibility - making LM60440ARPKR optimal for new 4-A industrial designs demanding miniaturization and reliability.
Availability
LM60440ARPKR is available at Aetrix Electronics and suitable for industrial PLC power rails, servo drive auxiliary supplies, medical diagnostic imaging modules, and factory automation sensor hubs requiring stable component supply across long product lifecycles.
Supply support for LM60440ARPKR 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 ICs, with decades of industrial-grade reliability validation and broad automotive/industrial qualification programs.
The LM604x0 product line was engineered specifically for rugged industrial DC/DC conversion - emphasizing ultra-small size, low EMI, wide input range, and functional safety readiness in harsh environments.
FAQ
What is the maximum output voltage supported by the LM60440ARPKR?
The LM60440ARPKR supports an adjustable output voltage range from 1 V to 24 V, set via an external resistor divider on the FB pin. The device maintains regulation up to 95% of VIN under certain conditions; however, the guaranteed operational range per datasheet is 1 V to 24 V across the full input range (3.8 V to 36 V) and load (0 A to 4 A). Output voltages above 24 V require consultation with Texas Instruments.
Does the LM60440ARPKR require external compensation components?
No, the LM60440ARPKR features internal loop compensation, eliminating the need for external Type-II or Type-III compensation networks. This simplifies PCB layout, reduces BOM count, and accelerates design validation - particularly beneficial for space-constrained industrial modules where layout iterations are costly.
How does the power-good (PG) flag behave during startup and fault conditions?
The LM60440ARPKR PG pin is an open-drain output that remains low until VOUT reaches 90–95% of target (depending on FB threshold hysteresis), then transitions high after a ~4-ms delay post-EN assertion. It pulls low during overcurrent, thermal shutdown, or EN deactivation. A 60–170 µs hardware glitch filter prevents false triggering during transient load steps - ensuring reliable microcontroller reset signaling.
Can the LM60440ARPKR operate with input voltage below 3.8 V?
No - the absolute minimum recommended input voltage for the LM60440ARPKR is 3.8 V. Operation below this level risks improper startup, loss of regulation, or undefined behavior due to insufficient headroom for the internal control circuitry and gate drivers. For sub-3.8-V applications, alternative regulators such as the TPS62864 or LM61440 should be evaluated.
What thermal design practices are required for reliable 4-A operation of the LM60440ARPKR?
To sustain 4-A continuous output at +150°C junction temperature, the LM60440ARPKR's DAP thermal pad must be soldered to a solid copper pour connected via ≥4 thermal vias (0.3-mm diameter, spaced ≤1 mm apart) to inner-layer ground planes. Input/output capacitors and inductor must be placed adjacent to minimize loop area, and airflow or heatsinking should be verified per JEDEC JESD51-7 simulation results showing RθJA = 54°C/W.
LM60440ARPKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 13-PowerWFQFN
- 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):
- 3.8V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 24V
- Current - Output:
- 4A
- Frequency - Switching:
- 400kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 13-WQFN-HR (3x2)
LM60440ARPKR FAQ
1.How can I place an order for LM60440ARPKR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM60440ARPKR 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 LM60440ARPKR reliable?
The price and inventory of LM60440ARPKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM60440ARPKR is usually 5 days.
3.What payment methods are accepted for LM60440ARPKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM60440ARPKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM60440ARPKR?
LM60440ARPKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM60440ARPKR 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 LM60440ARPKR?
For technical support, including LM60440ARPKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM60440ARPKR requirements.
6.How does Aetrix verify that LM60440ARPKR is sourced from the original manufacturer or authorized distributors?
All LM60440ARPKR 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 LM60440ARPKR meets industry standards.
7.What is the process for return or replacement of LM60440ARPKR?
All LM60440ARPKR units undergo pre-shipment inspection (PSI). If there is an issue with LM60440ARPKR, 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 LM60440ARPKR part is unused and in its original packaging.
Return procedure for LM60440ARPKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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