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Texas Instruments LMR23610AQDDARQ1
- Part No.:
- LMR23610AQDDARQ1
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMR23610AQDDARQ1.pdf
- Description:
- IC REG BUCK ADJ 1A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:8,118
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Product details
Overview
LMR23610AQDDARQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified 36 V, 1 A synchronous step-down DC-DC converter in HSOIC-8 package, featuring 4–36 V input range, 400 kHz fixed switching frequency with PFM mode, 75 µA quiescent current, and internal compensation - designed for automotive battery regulation and industrial power supplies.
For engineers reviewing the LMR23610AQDDARQ1 datasheet, LMR23610AQDDARQ1 pinout, LMR23610AQDDARQ1 application, or LMR23610AQDDARQ1 equivalent, key selection considerations include VIN UVLO thresholds (3.3–3.9 V rising), 1.0 V ±2% reference accuracy, hiccup-mode short-circuit protection, thermal shutdown at 162–178 °C, and synchronization capability up to 2.2 MHz.
Technical Context
The LMR23610AQDDARQ1 employs peak current mode control with fixed 400 kHz nominal switching frequency and automatic transition to PFM mode below ~100 mA load to maintain high light-load efficiency. It integrates high-side (185 mΩ) and low-side (105 mΩ) MOSFETs, uses a precision 1.0 V feedback reference, and supports external clock synchronization from 200 kHz to 2.2 MHz via the EN/SYNC pin.
Internal compensation eliminates need for external loop components; soft-start time is 1–3 ms; minimum on-time is 60 ns and minimum off-time is 100 ns, enabling operation down to ~4.2 V input at 5 V output with frequency foldback. Protection includes cycle-by-cycle current limiting (HS limit 1.4–2.6 A), thermal shutdown with 15 °C hysteresis, and VIN/VCC under-voltage lockout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4 V to 36 V - supports direct connection to automotive battery (cold crank to load dump) and wide-input industrial rails. |
| Output Current | 1 A continuous - sufficient for powering microcontrollers, sensors, and communication ICs in automotive ECUs. |
| Switching Frequency | 400 kHz default, syncable 200 kHz–2.2 MHz - enables EMI optimization and compatibility with system clocks. |
| Quiescent Current | 75 µA in PFM mode - extends battery life in always-on automotive modules (e.g., body control units). |
| Feedback Reference | 1.000 V ±20 mV over -40 °C to +125 °C - ensures stable output regulation across full automotive temperature range. |
| Thermal Shutdown | 162–178 °C with 15 °C hysteresis - protects die during overload or poor PCB thermal design without premature shutdown. |
| UVLO Threshold | Rising: 3.3–3.9 V, Hysteresis: 0.4 V - prevents erratic startup during battery brownout while ensuring reliable turn-on above nominal 12 V. |
Pinout & Package
LMR23610AQDDARQ1 is housed in an 8-pin HSOIC package (4.9 mm × 3.9 mm) with exposed thermal pad (Pin 9) for enhanced heat dissipation. The package supports surface-mount reflow and requires thermal vias to inner ground planes for optimal junction temperature management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (1) | Switch node | Connects to inductor; carries high di/dt switching current - requires short, low-inductance trace and Kelvin return path. |
| BOOT (2) | Bootstrap supply | Drives high-side MOSFET gate; requires 100 nF ceramic capacitor between BOOT and SW for proper gate voltage generation. |
| VCC (3) | Internal LDO output | Supplies bias for control circuitry; must be bypassed with ≥2.2 µF/16 V ceramic cap to AGND - no external load permitted. |
| FB (4) | Feedback input | Senses output voltage divider; 1.0 V reference sets VOUT = 1.0 × (1 + RFBT/RFBB) - use 1% resistors for <1% output error. |
| EN/SYNC (5) | Enable & sync input | Logic-high (>1.55 V) enables regulator; AC-coupled external clock synchronizes switching - dual-function pin reduces BOM count. |
| AGND (6) | Analog ground | Reference for FB, EN, and internal references - must connect to clean ground plane separate from PGND until single-point tie. |
| VIN (7) | Main input supply | Accepts 4–36 V; requires local 10 µF ceramic input capacitor placed near pin with low-ESR and short loop to PGND. |
| PGND (8) | Power ground | Return path for low-side FET and input/output capacitors - connects internally to power MOSFET sources; ties to thermal pad. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for -40 °C to +125 °C ambient operation - meets automotive reliability and stress-test requirements without derating. |
| Integrated synchronous MOSFETs | 185 mΩ HS / 105 mΩ LS RDS(on) - eliminates external rectifier, improves efficiency by ~5% vs. asynchronous designs at 1 A. |
| Internal compensation | No external compensation network required - reduces solution size, simplifies layout, and guarantees stability with common output capacitors. |
| Soft-start into pre-biased output | Prevents reverse current flow when powering up into existing VOUT - essential for hot-swap and multi-rail sequencing applications. |
| Hiccup-mode short-circuit protection | Enters 5 ms retry cycle after 64 consecutive current-limit events - limits power dissipation during sustained fault without latch-off. |
Applications
| Automotive Body Control Module | Industrial PLC I/O Power |
|---|---|
Use Scenario: Powers MCU, CAN transceiver, and sensor interface circuits in door module or lighting controller with 12 V battery input subject to load dump and cold crank. IC Role / Device Role / Timing Role: Primary 5 V or 3.3 V point-of-load regulator delivering regulated rail with fast transient response and low quiescent current. Use Value: 75 µA IQ enables >10-year battery standby life; 36 V max input withstands ISO 7637-2 pulse 5a (76 V); AEC-Q100 qualification ensures field reliability. | Use Scenario: Supplies isolated analog front-end and digital logic in programmable logic controller rack with 24 V DC industrial bus. IC Role / Device Role / Timing Role: Wide-input buck converter generating stable 5 V rail for FPGA configuration, ADC drivers, and communication peripherals. Use Value: 4–36 V input covers 24 V ±20% tolerance and brownout conditions; 400 kHz switching allows compact 22 µH inductor; hiccup protection avoids system shutdown during sensor short. |
| Telecom Remote Radio Unit | Automotive ADAS Camera Power |
Use Scenario: Provides 3.3 V power to RF front-end and baseband processor in outdoor small-cell radio powered from 48 V PoE-derived supply. IC Role / Device Role / Timing Role: Intermediate step-down stage converting 12 V intermediate rail to low-noise 3.3 V for sensitive RF circuitry. Use Value: PFM mode maintains >85% efficiency at 10 mA sleep current; SYNC pin enables alignment with system clock to reduce beat frequencies. | Use Scenario: Powers image sensor, ISP, and serializer in rear-view or surround-view camera with strict EMI and thermal constraints in confined housing. IC Role / Device Role / Timing Role: Compact, thermally efficient 5 V regulator mounted directly on camera PCB with minimal external components. Use Value: HSOIC-8 with PowerPAD enables ≤40 °C/W θJA with 2 oz copper; 60 ns min on-time supports 5 V out from 6.5 V min input during cold crank. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR23615AQDDARQ1 | 1.5 A output current, identical pinout and features - higher current headroom with same footprint and layout. | Required where peak load exceeds 1 A (e.g., multi-sensor nodes) but thermal margin is constrained. | Select when future-proofing for higher current or when operating near LMR23610AQDDARQ1's 1 A thermal limit at high ambient. |
| TPS543320RTWR | 3 A output, 2.2 V–18 V input, 2.2 MHz switching, integrated MOSFETs - higher frequency enables smaller magnetics but narrower VIN range. | Better suited for space-constrained 12 V systems where 36 V input is unnecessary and EMI filtering is critical. | Choose for high-density 12 V applications needing >1 A, faster transient response, or tighter output ripple - not drop-in due to different pinout and control scheme. |
Compared with LMR23610AQDDARQ1, the LMR23615AQDDARQ1 offers seamless upgrade path with identical layout and qualification, while the TPS543320RTWR trades automotive input range for higher frequency and current in non-automotive 12 V designs - neither is pin-compatible, but both address adjacent design constraints.
Availability
LMR23610AQDDARQ1 is available at Aetrix Electronics and suitable for automotive battery regulation, industrial PLC power supplies, telecom remote radio units, and ADAS camera subsystems requiring stable component supply with full AEC-Q100 traceability.
Supply support for LMR23610AQDDARQ1 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 designing analog ICs, embedded processors, and connectivity solutions for automotive, industrial, and communications markets.
The LMR23610AQDDARQ1 belongs to TI's SIMPLE SWITCHER® automotive-grade DC-DC converter family, engineered specifically for robust, easy-to-use power conversion in harsh environments where reliability, thermal performance, and qualification compliance are mandatory.
FAQ
What is the maximum input voltage rating for the LMR23610AQDDARQ1?
The LMR23610AQDDARQ1 has an absolute maximum input voltage rating of 42 V, with recommended operating range from 4 V to 36 V. This 36 V upper limit ensures reliable operation under automotive load-dump conditions per ISO 7637-2, while the 42 V absolute rating provides margin against transient spikes. Operation beyond 36 V may trigger internal protection or degrade long-term reliability, so design margins should keep steady-state VIN ≤36 V.
Does the LMR23610AQDDARQ1 require external compensation components?
No, the LMR23610AQDDARQ1 features fully internal compensation, eliminating the need for external Type II or Type III compensation networks. This simplifies design, reduces BOM count, and guarantees stability across its full operating range with standard ceramic or mixed-output capacitors. A feed-forward capacitor (CFF) across the top feedback resistor is optional and recommended only to improve transient response in high-performance applications.
Can the LMR23610AQDDARQ1 synchronize to an external clock, and what are the valid frequency ranges?
Yes, the LMR23610AQDDARQ1 can synchronize its switching frequency to an external clock applied to the EN/SYNC pin via AC coupling. Valid synchronization frequencies span 200 kHz to 2.2 MHz, with minimum pulse width of 100 ns and amplitude exceeding 2.8 V peak-to-peak. This capability enables EMI reduction through frequency dithering or alignment with system clocks in noise-sensitive applications like ADAS or audio subsystems.
What is the purpose of the thermal pad (Pin 9) on the LMR23610AQDDARQ1 HSOIC package?
The thermal pad (Pin 9) on the LMR23610AQDDARQ1 is a low-impedance connection to AGND and serves as the primary heat dissipation path from the die to the PCB. It must be soldered to a dedicated thermal land connected via multiple vias to internal ground planes. Proper thermal pad implementation reduces junction-to-board thermal resistance (RθJB) to 23.4 °C/W, enabling 1 A continuous operation at +85 °C ambient without derating - omitting or undersizing this pad risks thermal shutdown or accelerated aging.
How does the LMR23610AQDDARQ1 handle short-circuit conditions on the output?
The LMR23610AQDDARQ1 responds to output short-circuit with hiccup-mode protection: after 64 consecutive cycles of valley current limit detection, it shuts down for 5 ms before attempting restart. This limits average power dissipation to safe levels, prevents thermal runaway, and avoids permanent latch-off. During normal operation, cycle-by-cycle peak current limiting (1.4–2.6 A) provides immediate overcurrent response without affecting regulation - making it suitable for applications with intermittent faults like sensor wiring shorts.
LMR23610AQDDARQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm Width)
- 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):
- 36V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 28V
- Current - Output:
- 1A
- Frequency - Switching:
- 400kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO PowerPad
LMR23610AQDDARQ1 FAQ
1.How can I place an order for LMR23610AQDDARQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR23610AQDDARQ1 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 LMR23610AQDDARQ1 reliable?
The price and inventory of LMR23610AQDDARQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR23610AQDDARQ1 is usually 5 days.
3.What payment methods are accepted for LMR23610AQDDARQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR23610AQDDARQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR23610AQDDARQ1?
LMR23610AQDDARQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR23610AQDDARQ1 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 LMR23610AQDDARQ1?
For technical support, including LMR23610AQDDARQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR23610AQDDARQ1 requirements.
6.How does Aetrix verify that LMR23610AQDDARQ1 is sourced from the original manufacturer or authorized distributors?
All LMR23610AQDDARQ1 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 LMR23610AQDDARQ1 meets industry standards.
7.What is the process for return or replacement of LMR23610AQDDARQ1?
All LMR23610AQDDARQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR23610AQDDARQ1, 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 LMR23610AQDDARQ1 part is unused and in its original packaging.
Return procedure for LMR23610AQDDARQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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