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Texas Instruments LM60440AQRPKRQ1
- Part No.:
- LM60440AQRPKRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 13-PowerWFQFN
- Datasheet:
-
LM60440AQRPKRQ1.pdf
- Description:
- IC REG BUCK ADJ 4A 13WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,047
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Product details
Overview
LM60440AQRPKRQ1 from Texas Instruments is an AEC-Q100-qualified, 3.8-V to 36-V input, 4-A synchronous step-down DC/DC converter in a 3.00 mm × 2.00 mm WQFN-13 package with wettable flanks. It delivers peak efficiency >95%, supports 400 kHz fixed-frequency PWM or PFM light-load operation, and integrates power-good (PG), enable (EN), and internal 5-V LDO (VCC) for industrial and automotive power rails.
For engineers reviewing the LM60440AQRPKRQ1 datasheet, LM60440AQRPKRQ1 pinout, LM60440AQRPKRQ1 application, or LM60440AQRPKRQ1 equivalent, key selection criteria include its AEC-Q100 qualification, 150°C junction rating, ultra-small thermally enhanced WQFN package, and integrated PG flag with glitch filtering - critical for safety-critical 12 V/24 V rail regulation in servo drives and automotive ECUs.
Technical Context
The LM60440AQRPKRQ1 uses peak-current-mode control with automatic PWM-to-PFM transition, enabling high efficiency across 10 mA–4 A load range. Its internal 5-V LDO powers control circuitry and supplies logic-level PG output, while valley and peak current limiting (ILIMIT = 4.0–4.9 A, ISC = 4.7–6.0 A) provide robust short-circuit protection with hiccup mode recovery.
Thermally optimized WQFN-13 package features symmetrical VIN/PGND layout to cancel magnetic fields, low parasitic inductance to suppress switch-node ringing, and DAP thermal pad with RθJB = 15.3°C/W for high-power-density layouts. The device operates from –40°C to +150°C junction temperature and meets CISPR22 Class 5 EMI standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.8 V to 36 V - supports wide industrial and automotive battery inputs including cold-crank (6 V) and load-dump (36 V) conditions. |
| Output Current | 0 A to 4 A continuous - rated for full 4-A load at TJ ≤ 150°C with proper PCB thermal design. |
| Switching Frequency | 400 kHz (fixed) - enables compact magnetics and predictable EMI profile; not adjustable. |
| Feedback Reference | 1.000 V ±15 mV - enables precise output voltage setting via external resistor divider (e.g., 5 V ±1.5% over full load/temp). |
| Quiescent Current | 25 µA typical - ensures ultra-low standby power in always-on automotive modules. |
| Power-Good Accuracy | ±5% window (90–110% of VFB) with 170 µs glitch filter - prevents false resets during transient load steps. |
| Junction Temperature Range | –40°C to +150°C - qualified per AEC-Q100 Grade 1, suitable for under-hood and motor-control environments. |
Pinout & Package
LM60440AQRPKRQ1 is housed in a 3.00 mm × 2.00 mm, 13-pin WQFN package with wettable flanks and exposed thermal pad (DAP). The package supports automated optical inspection (AOI) and provides low thermal resistance (RθJB = 15.3°C/W) when soldered to ≥4 thermal vias on 2-oz copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 11 | PGND | Power ground return path for high-current switching loop; must connect directly to AGND and input capacitor ground plane with short, wide traces. |
| 2, 10 | VIN | Main input supply (3.8–36 V); requires local 10-µF ceramic bypass capacitor placed adjacent to pins 2/10 and PGND. |
| 3, 12 | SW | Switch node connecting internal high-side/low-side MOSFETs to external inductor; high dv/dt node requiring minimal trace area. |
| 4 | BOOT | Bootstrap supply for high-side driver; requires 100-nF X7R capacitor between BOOT and SW pins. |
| 5 | VCC | Internal 5-V LDO output; powers control logic and can source PG pull-up; must decouple with 1-µF ceramic to AGND. |
| 6 | AGND | Analog ground reference for FB, EN, PG; separate from PGND but connected at single point near input capacitor. |
| 7 | FB | Resistor-divider feedback input; senses output voltage; 1-V reference enables accurate adjustable VOUT from 1 V to 24 V. |
| 8 | PG | Open-drain power-good flag; asserts high after soft-start when VOUT is within ±5% of target; includes 170-µs glitch filter. |
| 9 | EN | Enable input with 1.231-V rising threshold; connects directly to VIN for always-on operation or to external UVLO divider. |
| 13 | DAP | Exposed thermal pad tied internally to PGND; primary heat dissipation path - must be soldered to ≥4 thermal vias to inner ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive applications with operating junction temperature up to +150°C and full reliability testing. |
| Integrated power-good (PG) flag | Open-drain output with ±5% accuracy window and 170-µs glitch filter - eliminates need for external supervisor IC in safety-critical systems. |
| Ultra-small WQFN-13 with wettable flanks | 3.0 mm × 2.0 mm footprint and IPC-compliant solder joints - enables AOI inspection and high-density placement in space-constrained ECUs. |
| Peak-current-mode control with PFM/PWM auto-transition | Maintains >90% efficiency at 10 mA (12 VIN/5 VOUT) and >95% peak efficiency - reduces thermal load without external mode control. |
| Symmetrical VIN/PGND pin layout | Minimizes high-current loop area and cancels magnetic fields - lowers radiated EMI to meet CISPR22 Class 5 without shielding. |
Applications
| Industrial Servo Drive Power Supply | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Provides regulated 5-V and 3.3-V rails for microcontroller, CAN transceiver, and sensor interface in servo amplifier PCBs exposed to 40–85°C ambient and vibration. IC Role / Device Role / Timing Role: Primary buck regulator delivering 4-A peak current to FPGA I/O banks and analog front-end; PG signal synchronizes MCU boot sequence. Use Value: 150°C junction rating and 4-A capability eliminate derating concerns; wettable flanks ensure solder joint reliability under mechanical stress. |
Use Scenario: Powers MCU, LIN transceiver, and LED drivers in door module with 9–16 V battery input and load-dump transients up to 36 V. IC Role / Device Role / Timing Role: Main 5-V system rail regulator; EN pin tied to ignition-switched 12 V; PG flag triggers MCU watchdog reset if output drops during cranking. Use Value: AEC-Q100 qualification and 25-µA quiescent current meet OEM sleep-mode current budgets (<100 µA) and lifetime reliability requirements. |
| Medical Infusion Pump Controller | PLC Digital I/O Module |
|
Use Scenario: Generates isolated 3.3-V logic rail from 24-V field bus in Class II medical equipment requiring low EMI and functional safety support. IC Role / Device Role / Timing Role: Safety-critical power stage supplying MCU and ADC; PG flag feeds into redundant monitoring circuit per IEC 62304. Use Value: CISPR22 Class 5 compliance avoids costly EMI filtering; documentation package supports ISO 13849 PLd functional safety certification. |
Use Scenario: Powers digital isolators and RS-485 transceivers in DIN-rail mounted PLC I/O modules operating continuously at 60°C ambient. IC Role / Device Role / Timing Role: High-efficiency 5-V rail generator; thermal pad (DAP) soldered to chassis ground for passive cooling; FB divider sets precise 5.00 V ±1.5%. Use Value: RθJB = 15.3°C/W enables full 4-A output without heatsink; 400 kHz switching allows use of low-profile 2.2-µH shielded inductors. |
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 |
|---|---|---|---|
| LM60440DRPKR | Same WQFN-13 package and 4-A rating, but 1-MHz switching frequency - higher frequency enables smaller inductors/capacitors but increases switching loss at high load. | Preferred for space-constrained designs where 1-MHz operation improves transient response and reduces output ripple. | Select LM60440DRPKR only if board layout supports higher-frequency EMI mitigation and thermal management remains adequate at 1 MHz. |
| TPS544B20RTWR | 4-A, 4.5–18-V input, 1.5-MHz capable; uses different current-mode architecture and lacks AEC-Q100 qualification or integrated PG flag. | Suitable for non-automotive industrial applications where functional safety and automotive qualification are not required. | Choose TPS544B20RTWR only when AEC-Q100, PG flag, or 36-V input capability are unnecessary - LM60440AQRPKRQ1 offers broader input range and automotive compliance. |
Compared with LM60440DRPKR, the LM60440AQRPKRQ1 trades higher-frequency flexibility for guaranteed CISPR22 Class 5 EMI performance and lower gate-drive losses at 400 kHz; versus TPS544B20RTWR, it adds AEC-Q100 qualification, integrated PG, and 36-V input tolerance - essential for automotive and harsh-environment deployment.
Availability
LM60440AQRPKRQ1 is available at Aetrix Electronics and suitable for automotive body control modules, industrial servo drives, and medical infusion pump controllers requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.
Supply support for LM60440AQRPKRQ1 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 automotive-grade product development and manufacturing excellence.
The LM604x0 family was designed specifically for rugged industrial and automotive power conversion - emphasizing small solution size, high efficiency across load range, EMI reduction, and functional safety readiness in extreme temperature environments.
FAQ
What is the maximum input voltage rating for LM60440AQRPKRQ1?
The LM60440AQRPKRQ1 has an absolute maximum input voltage rating of 38 V, with recommended operating input range from 3.8 V to 36 V. This allows reliable operation during automotive load-dump events (up to 36 V) and cold-crank conditions (down to 3.8 V), making LM60440AQRPKRQ1 suitable for 12 V and 24 V vehicle electrical systems.
Does LM60440AQRPKRQ1 require external compensation components?
No, LM60440AQRPKRQ1 features fully internal loop compensation, eliminating the need for external compensation networks. This simplifies design, reduces BOM count, and improves consistency across production units - a key advantage of LM60440AQRPKRQ1 over externally compensated buck regulators.
How does the power-good (PG) flag behave during startup and fault conditions for LM60440AQRPKRQ1?
The LM60440AQRPKRQ1 PG flag remains low for ~4 ms after EN assertion, then goes high when VOUT reaches 95% of target and stays within ±5% window for ≥170 µs. It pulls low during thermal shutdown, current limit hiccup, or EN deactivation - providing deterministic reset signaling for MCUs without external supervision circuits.
What thermal design guidance applies to the DAP pad of LM60440AQRPKRQ1?
The DAP pad of LM60440AQRPKRQ1 must be soldered to a solid ground plane with ≥4 thermal vias (0.3-mm diameter, spaced ≤1 mm apart) connecting to inner-layer ground planes. TI specifies RθJB = 15.3°C/W under JEDEC 4-layer board conditions - achieving this requires minimum 100 mm² copper area under the DAP to sustain 4-A continuous output at +150°C junction temperature.
Is LM60440AQRPKRQ1 pin-compatible with other devices in the LM604x0 family?
Yes, LM60440AQRPKRQ1 shares identical WQFN-13 pinout and footprint with LM60430AQRPKRQ1 (3-A), LM60440DRPKR (1-MHz), and LM60430DRPKR. This allows direct substitution within the same PCB layout when adjusting current rating or switching frequency - a documented feature of the LM604x0 family per TI's device comparison table.
LM60440AQRPKRQ1 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 13-WQFN-HR (3x2)
LM60440AQRPKRQ1 FAQ
1.How can I place an order for LM60440AQRPKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM60440AQRPKRQ1 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 LM60440AQRPKRQ1 reliable?
The price and inventory of LM60440AQRPKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM60440AQRPKRQ1 is usually 5 days.
3.What payment methods are accepted for LM60440AQRPKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM60440AQRPKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM60440AQRPKRQ1?
LM60440AQRPKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM60440AQRPKRQ1 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 LM60440AQRPKRQ1?
For technical support, including LM60440AQRPKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM60440AQRPKRQ1 requirements.
6.How does Aetrix verify that LM60440AQRPKRQ1 is sourced from the original manufacturer or authorized distributors?
All LM60440AQRPKRQ1 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 LM60440AQRPKRQ1 meets industry standards.
7.What is the process for return or replacement of LM60440AQRPKRQ1?
All LM60440AQRPKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM60440AQRPKRQ1, 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 LM60440AQRPKRQ1 part is unused and in its original packaging.
Return procedure for LM60440AQRPKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM60440AQRPKRQ1 Tags
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