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Texas Instruments LMR23625CFQDDARQ1
- Part No.:
- LMR23625CFQDDARQ1
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMR23625CFQDDARQ1.pdf
- Description:
- IC REG BUCK ADJ 2.5A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:2,696
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Product details
Overview
LMR23625CFQDDARQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified 36-V, 2.5-A synchronous step-down DC-DC converter in HSOIC-8 package, featuring 4–36 V input range, fixed 2.1-MHz switching frequency, FPWM mode option for constant-frequency operation, and internal compensation. It delivers stable 5-V or 3.3-V output for automotive infotainment power rails.
For engineers reviewing the LMR23625CFQDDARQ1 datasheet, LMR23625CFQDDARQ1 pinout, LMR23625CFQDDARQ1 application, or LMR23625CFQDDARQ1 equivalent, key selection considerations include its FPWM-only operation (no PFM), 60-ns minimum on-time, 75-μA no-load quiescent current, and compatibility with 2.2-μH inductors and ceramic output capacitors in space-constrained automotive modules.
Technical Context
The LMR23625CFQDDARQ1 implements fixed-frequency peak-current-mode control with internal loop compensation, eliminating external compensation components. Its FPWM-only operation ensures constant 2.1-MHz switching across all load conditions, enabling predictable EMI filtering and tight output voltage regulation under dynamic loads.
It integrates high-side and low-side NMOS power switches (185 mΩ / 105 mΩ typical RDS(on)), supports soft-start into prebiased outputs, and includes cycle-by-cycle current limiting, hiccup-mode short-circuit protection, and thermal shutdown at 170°C. The EN/SYNC pin enables both precision enable control and external clock synchronization from 200 kHz to 2.2 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4 V to 36 V - supports direct connection to automotive battery (9–16 V nominal) with cold-crank margin down to 4 V. |
| Output Current | 2.5 A continuous - sufficient to power dual-core MCU, display interface, and USB PHY in head-unit applications. |
| Switching Frequency | Fixed 2.1 MHz (±15%) - enables use of small 2.2-μH inductors and reduces audible noise in cabin environments. |
| Quiescent Current | 75 μA in no-load FPWM mode - maintains low standby power without requiring external bias supply. |
| Min. On-Time | 60 ns - supports high-duty-cycle operation (e.g., 5 V out from 8 V in) without pulse-skipping artifacts. |
| Feedback Reference | 1.0 V ±2% over –40°C to +125°C - enables accurate resistor-divider-based output setting with <±1% total VOUT error. |
| Thermal Shutdown | 170°C threshold with 15°C hysteresis - protects against sustained overload in sealed enclosures without external thermal monitoring. |
Pinout & Package
LMR23625CFQDDARQ1 is packaged in an 8-pin HSOIC (DDA) with 4.90 mm × 3.90 mm body size and exposed thermal pad. The package supports >2.5-A continuous operation with RθJA = 42.0°C/W and requires PCB copper pour connected to PGND and PAD for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switch node | Connects to inductor; carries high di/dt switching current - must be routed with minimal loop area to reduce EMI. |
| BOOT | Bootstrap supply | Requires 470-nF ceramic capacitor to SW; enables high-side MOSFET gate drive above VIN. |
| VCC | Bias LDO output | Supplies internal circuitry; bypass with 2.2-μF/16-V ceramic to AGND - never load externally. |
| FB | Feedback input | Monitors output via resistor divider; 1-V reference enables precise VOUT setting (e.g., 5 V with 499-kΩ/100-kΩ). |
| EN/SYNC | Enable & sync input | Active-high enable (1.55 V threshold); also accepts AC-coupled sync pulses (200–2200 kHz) for system clock alignment. |
| AGND | Analog ground | Reference for FB, EN, and internal circuits - connect to clean system ground plane, separate from PGND if possible. |
| VIN | Main input supply | Accepts 4–36 V; requires local 10-μF ceramic input capacitor near pin to suppress high-frequency ripple. |
| PGND | Power ground | Internal connection to low-side FET source - tie directly to CIN, COUT, and thermal pad with short, wide trace. |
Key Features
| Feature | Design Value |
|---|---|
| FPWM-only operation | Eliminates light-load frequency variation - ensures consistent EMI signature and avoids audio-band switching in sensitive cabin electronics. |
| Integrated synchronous MOSFETs | Reduces external component count by two; 185/105 mΩ RDS(on) enables >90% efficiency at 1-A load with 12-V input. |
| Internal compensation | Removes need for external Type-II/III compensation network - simplifies layout and accelerates design validation. |
| Soft-start into prebiased output | Prevents reverse current flow when powering up partially charged rails - critical for hot-plug USB charging ports. |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation with HBM ±2000 V and CDM ±1000 V - meets automotive reliability requirements. |
Applications
| Automotive Cluster Power Supply | USB-C Charging Module |
|---|---|
Use Scenario: Powers TFT-LCD driver ICs, microcontroller, and CAN transceiver in digital instrument clusters. IC Role / Device Role / Timing Role: Primary 5-V buck regulator delivering 2.5-A peak current with fast transient response to backlight dimming events. Use Value: Fixed 2.1-MHz switching enables compact 2.2-μH inductor placement near cluster ECU; FPWM mode prevents audible noise during quiet driving conditions. | Use Scenario: Generates stable 5-V bus for USB-C PD sink applications in rear-seat entertainment systems. IC Role / Device Role / Timing Role: Secondary buck stage regulating from 12-V vehicle bus to USB-compliant 5-V output with tight ±1% regulation. Use Value: 1-V feedback reference and internal compensation ensure <±1% output error across temperature; EN/SYNC allows synchronization to system SoC clock. |
| Head-Up Display (HUD) Core Supply | Telematics Control Unit (TCU) PMIC Stage |
Use Scenario: Supplies 3.3-V logic rail for DMD controller and video decoder in HUD projection units. IC Role / Device Role / Timing Role: High-efficiency synchronous buck converting 12-V battery to low-noise 3.3-V domain with <10-mV ripple in FPWM mode. Use Value: 60-ns minimum on-time supports 3.3-V output from 8-V minimum input during cold-crank; integrated MOSFETs eliminate external diode losses. | Use Scenario: Provides regulated 5-V supply to LTE modem, GNSS receiver, and secure element in automotive TCU modules. IC Role / Device Role / Timing Role: Input-stage buck converter accepting wide 4–36-V automotive input and delivering clean 5-V rail with hiccup-mode short-circuit protection. Use Value: Thermal shutdown at 170°C and cycle-by-cycle current limit protect against antenna fault-induced overloads; AEC-Q100 qualification ensures field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR23625CQDDARQ1 | No FPWM mode; operates in PFM at light load - higher light-load efficiency but variable switching frequency. | Suitable for always-on modules where ultra-low standby current (<10 μA) is prioritized over EMI predictability. | Select LMR23625CQDDARQ1 only if PFM's variable frequency is acceptable and lowest possible IQ is required. |
| LMR23615CFQDDARQ1 | 1.5-A output rating; identical FPWM mode, pinout, and feature set - smaller current capability with same footprint. | Applicable where peak load current remains ≤1.5 A, enabling cost reduction without layout change. | Choose LMR23615CFQDDARQ1 for lower-power telematics nodes or sensor hubs where full 2.5-A headroom is unnecessary. |
Compared with LMR23625CQDDARQ1, the LMR23625CFQDDARQ1 trades light-load efficiency for EMI control via FPWM; compared with LMR23615CFQDDARQ1, it provides 67% higher current capacity in identical SOIC-8 packaging - enabling single-design scalability across tiered automotive platforms.
Availability
LMR23625CFQDDARQ1 is available at Aetrix Electronics and suitable for automotive infotainment, USB charging, and off-battery power conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMR23625CFQDDARQ1 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 specializing in analog, embedded processing, and power management technologies, with deep expertise in automotive-grade IC design and manufacturing.
The LMR23625CFQDDARQ1 belongs to TI's SIMPLE SWITCHER® automotive DC-DC converter family, engineered specifically for robust, low-EMI power conversion in harsh automotive environments - emphasizing AEC-Q100 compliance, thermal resilience, and simplified system integration.
FAQ
What is the switching frequency tolerance of the LMR23625CFQDDARQ1?
The LMR23625CFQDDARQ1 operates at a nominal 2.1-MHz switching frequency with ±15% tolerance across temperature, input voltage, and load conditions. This fixed frequency is factory-trimmed and does not require external timing components. The tolerance ensures predictable EMI filter design while maintaining regulation accuracy within automotive operating ranges.
Does the LMR23625CFQDDARQ1 support power-good signaling?
No, the LMR23625CFQDDARQ1 does not include a PGOOD pin. That function is available only on the WSON-package variant LMR23625CFPQDRRRQ1. The LMR23625CFQDDARQ1 uses an 8-pin HSOIC package without PGOOD; system-level power monitoring must be implemented externally using the FB pin or dedicated supervisor ICs.
Can the LMR23625CFQDDARQ1 be synchronized to an external clock?
Yes, the LMR23625CFQDDARQ1 supports external clock synchronization via its EN/SYNC pin. An AC-coupled positive pulse (≥2.8 V peak-to-peak, ≥100 ns pulse width) can synchronize the internal oscillator from 200 kHz to 2.2 MHz. This enables EMI reduction through frequency dithering or alignment with system SoC clocks in automotive domain controllers.
What is the maximum recommended output capacitance for the LMR23625CFQDDARQ1?
The LMR23625CFQDDARQ1 supports up to 470 μF total output capacitance with ceramic or polymer types. TI's reference designs use 47 μF × 2 in parallel for optimal ESR/ESL balance. Exceeding 470 μF may delay soft-start and increase inrush current stress on the internal MOSFETs during startup, especially into prebiased loads.
How does the LMR23625CFQDDARQ1 handle short-circuit conditions?
The LMR23625CFQDDARQ1 employs hiccup-mode short-circuit protection: upon detecting valley current limit violation for 64 consecutive cycles, it shuts down for 5 ms (HSOIC package), then retries. This limits average power dissipation during sustained shorts, preventing thermal runaway while allowing automatic recovery once the fault clears - critical for unattended automotive modules.
LMR23625CFQDDARQ1 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:
- 2.5A
- Frequency - Switching:
- 2.1MHz
- 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
LMR23625CFQDDARQ1 FAQ
1.How can I place an order for LMR23625CFQDDARQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR23625CFQDDARQ1 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 LMR23625CFQDDARQ1 reliable?
The price and inventory of LMR23625CFQDDARQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR23625CFQDDARQ1 is usually 5 days.
3.What payment methods are accepted for LMR23625CFQDDARQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR23625CFQDDARQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR23625CFQDDARQ1?
LMR23625CFQDDARQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR23625CFQDDARQ1 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 LMR23625CFQDDARQ1?
For technical support, including LMR23625CFQDDARQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR23625CFQDDARQ1 requirements.
6.How does Aetrix verify that LMR23625CFQDDARQ1 is sourced from the original manufacturer or authorized distributors?
All LMR23625CFQDDARQ1 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 LMR23625CFQDDARQ1 meets industry standards.
7.What is the process for return or replacement of LMR23625CFQDDARQ1?
All LMR23625CFQDDARQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR23625CFQDDARQ1, 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 LMR23625CFQDDARQ1 part is unused and in its original packaging.
Return procedure for LMR23625CFQDDARQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMR23625CFQDDARQ1 Tags
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