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Texas Instruments LMR23625CFQDDAQ1
- Part No.:
- LMR23625CFQDDAQ1
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMR23625CFQDDAQ1.pdf
- Description:
- IC REG BUCK ADJ 2.5A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:1,105
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Product details
Overview
LMR23625CFQDDAQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified 36-V, 2.5-A synchronous step-down DC-DC converter in an 8-pin HSOIC package, featuring fixed 2.1-MHz switching frequency, 75-μA quiescent current in PFM mode, integrated high- and low-side MOSFETs (185 mΩ/105 mΩ), and FPWM mode support for constant-frequency operation. It delivers stable 5-V or 3.3-V output in automotive infotainment power rails.
For engineers reviewing the LMR23625CFQDDAQ1 datasheet, LMR23625CFQDDAQ1 pinout, LMR23625CFQDDAQ1 application, or LMR23625CFQDDAQ1 equivalent, key selection criteria include input voltage range (4–36 V), light-load efficiency mode (PFM/FPWM), EN/SYNC dual-function pin behavior, thermal performance (RθJA = 42.0°C/W), and automotive-grade reliability (–40°C to +125°C ambient).
Technical Context
The LMR23625CFQDDAQ1 employs peak-current-mode control with internal compensation, eliminating external loop components. Its 60-ns minimum on-time enables high duty-cycle operation down to 1.2-V output at 36-V input, while FPWM mode ensures fixed 2.1-MHz switching regardless of load.
It integrates a precision 1-V reference (±2% over temperature), supports soft-start into prebiased loads, and features hiccup-mode short-circuit protection triggered after 64 cycles of valley current limit violation. The EN/SYNC pin provides both enable control and external clock synchronization (200 kHz–2.2 MHz) via AC coupling.
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) and industrial 24-V rails without pre-regulation. |
| Output Current | 2.5 A continuous - sufficient for powering USB charging ports, display controllers, or MCU subsystems in clusters. |
| Switching Frequency | Fixed 2.1 MHz (typ) - enables compact magnetics and EMI filtering; synchronizable to external clock for system-level noise management. |
| Quiescent Current | 75 μA in PFM mode - extends battery runtime in always-on automotive modules like telematics or body control units. |
| High-Side RDS(on) | 185 mΩ (HSOIC) - limits conduction loss at full load; combined with 105-mΩ low-side FET, enables >90% efficiency at 1-A load with 12-V input. |
| UVLO Threshold | Rising: 3.7 V (typ), hysteresis: 0.4 V - prevents erratic startup during cold cranking when battery dips below 6 V. |
| Thermal Resistance | RθJA = 42.0°C/W (HSOIC) - requires minimal copper area for thermal relief in space-constrained head unit PCBs. |
Pinout & Package
Package: 8-pin HSOIC (DDA), body size 4.90 mm × 3.90 mm, PowerPAD™ exposed thermal pad (Pin 9, connected to PGND).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switch node | Connects to power inductor; carries high di/dt switching current - requires short, low-inductance trace to minimize EMI and voltage spikes. |
| BOOT | Bootstrap supply | Drives high-side gate; requires 470-nF ceramic capacitor between BOOT and SW to sustain gate drive above VIN during HS conduction. |
| VCC | Bias LDO output | Internal 4.1-V supply for control circuitry; must be bypassed with 2.2-μF ceramic cap to AGND - no external loading permitted. |
| FB | Feedback input | Monitors output via resistor divider; 1-V reference enables precise VOUT setting (e.g., 5 V with RFBT = 499 kΩ, RFBB = 100 kΩ). |
| EN/SYNC | Enable & sync input | Dual-function pin: logic-high (>1.55 V) enables regulation; AC-coupled external clock (200 kHz–2.2 MHz) forces synchronization. |
| AGND | Analog ground | Reference for FB, EN, and internal references; must be star-connected to PGND at single point to avoid noise coupling. |
| VIN | Main input supply | Accepts 4–36 V; requires local 10-μF ceramic input capacitor near pin to suppress ripple and transients. |
| PGND | Power ground | Low-side FET source return; connects internally to exposed PAD - must be tied to large ground plane for thermal and EMI performance. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation, HBM ±2000 V, CDM ±1000 V - meets automotive functional safety baseline requirements. |
| Integrated synchronous rectification | Eliminates external Schottky diode; reduces conduction loss by ~30% vs. asynchronous design at 2-A load, improving thermal margin. |
| Internal compensation | Removes need for external Type II/III compensation network - simplifies layout and reduces BOM count by ≥3 passive components. |
| Soft-start into prebiased load | Prevents output overshoot when powering circuits with stored charge (e.g., downstream LDOs or capacitive displays), avoiding latch-up or damage. |
| Output short-circuit protection | Hiccup mode activates after 64 consecutive valley current limit trips - limits average power dissipation during fault, enabling safe auto-recovery. |
Applications
| Automotive Instrument Cluster Power | USB-C Charging Port Supply |
|---|---|
Use Scenario: Powers TFT-LCD display, microcontroller, and CAN transceiver in digital dashboard under cold-crank (6 V) and load-dump (36 V) conditions. IC Role / Device Role / Timing Role: Primary 5-V buck regulator delivering 2.5-A peak current; operates in FPWM mode to maintain tight output regulation during CAN bus activity-induced load transients. Use Value: Fixed 2.1-MHz switching avoids audible noise in cabin; 75-μA quiescent current minimizes parasitic drain during vehicle sleep mode. | Use Scenario: Supplies 5-V/2.4-A USB Power Delivery (PD) sink port in center console, supporting simultaneous charging of smartphones and tablets. IC Role / Device Role / Timing Role: Secondary buck stage stepping down 12-V vehicle bus to regulated 5 V; uses EN/SYNC pin to align switching edges with system clock, reducing conducted EMI in shared PCB layers. Use Value: Integrated 185-mΩ/105-mΩ MOSFETs achieve >92% efficiency at 2-A load, limiting thermal rise in confined enclosure without heatsink. |
| Heads-Up Display (HUD) Backlight Driver | Telematics Control Unit (TCU) Core Rail |
Use Scenario: Generates stable 3.3-V rail for HUD projector ASIC and LED driver IC, operating continuously during driving with rapid ambient temperature swings. IC Role / Device Role / Timing Role: Fixed-output 3.3-V regulator with PFM mode enabled - maintains >85% efficiency at 100-mA standby current while suppressing switching noise that could interfere with optical sensors. Use Value: 60-ns minimum on-time supports 3.3-V output even at max input (36 V), enabling single-stage conversion without intermediate 5-V stage. | Use Scenario: Provides 1.2-V core supply for LTE modem SoC in TCU, requiring clean, low-noise power during cellular transmission bursts. IC Role / Device Role / Timing Role: Synchronous buck converter with internal soft-start and precision enable - sequences power after baseband processor initialization, preventing brownout during boot. Use Value: Internal 1-V reference (±2% over temp) ensures <±1% output deviation across –40°C to +125°C, meeting SoC voltage tolerance specs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR23625CQDDARQ1 | No FPWM mode; only PFM operation at light load - higher light-load ripple, no external sync capability. | Suitable for cost-sensitive non-EMI-critical applications where constant frequency is not required. | Select when FPWM and sync features are unnecessary and BOM cost reduction is prioritized over EMI control. |
| LMR23615CFQDDAQ1 | 1.5-A output rating, identical pinout and feature set - lower current capability but same thermal footprint and control architecture. | Applicable where peak load current is ≤1.5 A, e.g., smaller infotainment modules or gateway ECUs. | Choose for lower-power variants in same platform to reduce component count and simplify layout reuse. |
Compared with LMR23625CQDDARQ1, the LMR23625CFQDDAQ1 adds FPWM and sync functionality at identical price and package, making it preferable for noise-sensitive designs; versus LMR23615CFQDDAQ1, it provides 67% higher current capacity without changing PCB layout, enabling scalable power delivery across product tiers.
Availability
LMR23625CFQDDAQ1 is available at Aetrix Electronics and suitable for automotive infotainment systems, USB charging solutions, and telematics control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMR23625CFQDDAQ1 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 and embedded processing technologies, with decades of automotive-grade power management innovation.
The LMR23625CFQDDAQ1 belongs to TI's SIMPLE SWITCHER® automotive DC-DC converter family, designed specifically for robust, easy-to-deploy power solutions in harsh-temperature vehicle environments where reliability and qualification compliance are mandatory.
FAQ
What is the maximum input voltage rating for the LMR23625CFQDDAQ1?
The LMR23625CFQDDAQ1 has an absolute maximum input voltage rating of 42 V, with recommended operating range from 4 V to 36 V. This allows direct connection to automotive batteries during load-dump events (up to 36 V) while maintaining safe margin against transient overvoltage. Operation beyond 36 V is not recommended for sustained use per datasheet specifications.
Does the LMR23625CFQDDAQ1 support output voltage adjustment?
Yes, the LMR23625CFQDDAQ1 supports adjustable output voltage via an external resistor divider connected to the FB pin. With a precision 1-V internal reference (±2% over temperature), typical configurations include 3.3 V (RFBT = 237 kΩ, RFBB = 100 kΩ) or 5 V (RFBT = 499 kΩ, RFBB = 100 kΩ). TI recommends 1% tolerance, low-TC resistors for stable regulation.
How does the EN/SYNC pin function in the LMR23625CFQDDAQ1?
The EN/SYNC pin on the LMR23625CFQDDAQ1 serves dual roles: as a precision enable input (1.55 V threshold, 0.4 V hysteresis) and as a synchronization interface. When used for sync, an AC-coupled external clock (200 kHz–2.2 MHz, >2.8 Vpp) forces the internal oscillator to lock, enabling deterministic EMI reduction. No additional components are needed beyond a 1-nF coupling capacitor.
What thermal performance can be expected from the LMR23625CFQDDAQ1 in HSOIC package?
The LMR23625CFQDDAQ1 in 8-pin HSOIC (DDA) package has a junction-to-ambient thermal resistance (RθJA) of 42.0°C/W. With 2.5-A load at 12-V input and 5-V output, typical power dissipation is ~1.2 W, resulting in ~50°C junction rise above ambient. Proper use of the exposed PowerPAD™ and 2-in² copper pour reduces this by up to 15°C in real-world layouts.
Is the LMR23625CFQDDAQ1 pin-compatible with other devices in the LMR236xx-Q1 family?
Yes, the LMR23625CFQDDAQ1 shares identical 8-pin HSOIC (DDA) pinout with LMR23610CQDDARQ1, LMR23615CQDDARQ1, and LMR23630CQDDARQ1. This enables direct substitution within the same PCB footprint when scaling output current from 1 A to 3 A, preserving layout integrity and reducing redesign effort across vehicle platforms.
LMR23625CFQDDAQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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):
- 1.024V
- 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
LMR23625CFQDDAQ1 FAQ
1.How can I place an order for LMR23625CFQDDAQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR23625CFQDDAQ1 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 LMR23625CFQDDAQ1 reliable?
The price and inventory of LMR23625CFQDDAQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR23625CFQDDAQ1 is usually 5 days.
3.What payment methods are accepted for LMR23625CFQDDAQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR23625CFQDDAQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR23625CFQDDAQ1?
LMR23625CFQDDAQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR23625CFQDDAQ1 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 LMR23625CFQDDAQ1?
For technical support, including LMR23625CFQDDAQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR23625CFQDDAQ1 requirements.
6.How does Aetrix verify that LMR23625CFQDDAQ1 is sourced from the original manufacturer or authorized distributors?
All LMR23625CFQDDAQ1 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 LMR23625CFQDDAQ1 meets industry standards.
7.What is the process for return or replacement of LMR23625CFQDDAQ1?
All LMR23625CFQDDAQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR23625CFQDDAQ1, 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 LMR23625CFQDDAQ1 part is unused and in its original packaging.
Return procedure for LMR23625CFQDDAQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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