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Texas Instruments LMR23625CFPQDRRRQ1
- Part No.:
- LMR23625CFPQDRRRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LMR23625CFPQDRRRQ1.pdf
- Description:
- IC REG BUCK ADJ 2.5A 12SON
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LMR23625CFPQDRRRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified 36-V, 2.5-A synchronous step-down DC-DC converter in a 12-pin WSON wettable flank package with power-good (PGOOD) output and forced PWM (FPWM) mode. It delivers 2.5-A continuous output current, operates from 4 V to 36 V input, features fixed 2.1-MHz switching frequency, and supports synchronization to external clocks up to 2.2 MHz. It is used in automotive infotainment clusters and USB charging systems requiring high reliability and low-light-load ripple.
For engineers reviewing the LMR23625CFPQDRRRQ1 datasheet, LMR23625CFPQDRRRQ1 pinout, LMR23625CFPQDRRRQ1 application, or LMR23625CFPQDRRRQ1 equivalent, key selection considerations include its integrated PGOOD flag, FPWM operation for constant-frequency regulation, 60-ns minimum on-time, internal compensation, and automotive-grade thermal shutdown at 170°C.
Technical Context
The LMR23625CFPQDRRRQ1 employs fixed-frequency peak-current-mode control with internal loop compensation, eliminating external compensation components. Its architecture integrates high-side and low-side NMOS switches with RDS(on) of 160 mΩ and 95 mΩ respectively, enabling efficient CCM/DCM operation across 4–36 V input.
It supports dual operating modes: PFM for ultra-low 75-μA quiescent current at no load, and FPWM for tight output regulation and EMI-controlled fixed-frequency operation. The EN/SYNC pin enables both precision enable control and external clock synchronization (200 kHz–2.2 MHz), while the open-drain PGOOD pin provides ±3% output voltage monitoring with deglitching delays of 150 μs (rise) and 18 μs (fall).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4 V to 36 V - supports direct connection to automotive battery rails including cold-crank (4.5 V) and load-dump (36 V) conditions. |
| Output Current | 2.5 A continuous - sufficient for powering SoCs, display drivers, and USB PD controllers without external current boosting. |
| Switching Frequency | Fixed 2.1 MHz (±15%) - enables compact magnetics and reduces EMI filtering requirements in space-constrained automotive modules. |
| Quiescent Current | 75 μA in PFM mode - extends battery runtime in always-on vehicle subsystems such as telematics and ADAS sensors. |
| Power-Good Accuracy | ±3% window (92–110% of VREF) - ensures reliable system-level power sequencing and fault detection in safety-critical ECUs. |
| Min. On-Time | 60 ns - supports high-duty-cycle operation down to VOUT/VIN ≈ 0.14 at 2.1 MHz, enabling 3.3-V output from 24-V input without frequency foldback. |
| Thermal Shutdown | 170°C threshold with 15°C hysteresis - protects against sustained overload or poor PCB thermal design in enclosed automotive enclosures. |
Pinout & Package
Package: 12-pin WSON (DRR) with wettable flanks and exposed thermal pad (3.00 mm × 3.00 mm body). Designed for automated optical inspection (AOI) and enhanced thermal performance via PCB copper pour under the PAD.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 SW | Switch node | High-frequency switching output connected to inductor; requires short, low-inductance layout to minimize EMI and voltage spikes. |
| 3 BOOT | Bootstrap supply | Drives high-side gate; requires 470-nF ceramic capacitor between BOOT and SW for reliable high-side FET turn-on. |
| 4 VCC | Internal LDO output | 4.1-V bias rail for control circuitry; must be bypassed with ≥2.2-μF ceramic cap to AGND/PAD - no external loading permitted. |
| 5 FB | Voltage feedback input | Connects to resistor divider tap; 1-V internal reference enables precise VOUT setting (e.g., 3.3 V, 5 V) with 1% resistors. |
| 6 PGOOD | Open-drain power-good flag | Asserts low when VOUT is within ±3% of target; requires 10–100-kΩ pullup to logic rail ≤12 V for system monitoring. |
| 7, 8 AGND | Analog ground reference | Reference for internal references and comparators; must be connected to clean system ground plane, separate from PGND if possible. |
| 9, 10 VIN | Main input supply | Accepts 4–36 V; requires local 10-μF ceramic input capacitor placed near pins 9/10 with minimal trace inductance. |
| 12 PGND | Power ground return | Low-side FET source connection; ties directly to CIN, COUT, and thermal PAD - forms primary high-current return path. |
| 13 PAD | Thermal & ground plane | Exposed die attach pad; must be soldered to ≥200 mm² copper pour for thermal dissipation and low-impedance PGND connection. |
| 11 NC | No connect | Not internally bonded; must remain unconnected and unpopulated on PCB. |
| 8 EN/SYNC | Enable & sync input | Dual-function pin: logic-high (>1.55 V) enables regulator; AC-coupled external clock (200 kHz–2.2 MHz) synchronizes switching frequency. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation with HBM ±2500 V and CDM ±750 V ESD robustness - meets automotive electronics reliability standards. |
| Integrated PGOOD with deglitching | 150-μs rise / 18-μs fall deglitching prevents false triggers during transient load steps - enables deterministic power sequencing in multi-rail systems. |
| FPWM mode option | Eliminates frequency dithering at light loads, maintaining constant 2.1-MHz operation for predictable EMI profile and tight output regulation (<±1% line/load). |
| Internal compensation | Removes need for external Type II/III compensation network - reduces BOM count, layout area, and design iteration time for stable 2.5-A buck designs. |
| Soft-start into prebiased output | Prevents reverse current flow when enabling into an already-biased rail - essential for hot-swap and power-domain sequencing in complex automotive ECUs. |
Applications
| Automotive Instrument Cluster | USB-C Charging Module |
|---|---|
Use Scenario: Powering TFT-LCD display, microcontroller, and CAN transceiver in digital dashboard with 12-V battery input and strict EMI limits. IC Role / Device Role / Timing Role: Primary 5-V/2.5-A power rail generator with PGOOD signaling to MCU for safe boot sequence and fault reporting. Use Value: 2.1-MHz fixed frequency avoids AM-band interference; FPWM mode ensures stable VOUT during display backlight dimming transients. | Use Scenario: Generating regulated 5-V/2.5-A output from 12–24-V vehicle bus for USB-C PD sink applications in center console. IC Role / Device Role / Timing Role: Synchronous buck converter with soft-start into prebiased load, enabling seamless handoff from legacy 5-V supplies during firmware updates. Use Value: 60-ns min on-time supports 5-V output from 24-V input at full duty cycle; PGOOD confirms rail readiness before enabling USB controller. |
| ADAS Camera Power Supply | Telematics Control Unit (TCU) |
Use Scenario: Providing clean, low-noise 3.3-V supply to image sensor and ISP in rear-view camera module exposed to engine bay temperatures. IC Role / Device Role / Timing Role: High-efficiency step-down regulator with PFM mode for standby current <100 μA and FPWM for active imaging bursts. Use Value: 75-μA quiescent current extends parking-mode battery life; thermal shutdown at 170°C prevents latch-up in sealed housings. | Use Scenario: Powering LTE modem, GNSS receiver, and microcontroller in cellular-connected TCU with frequent deep-sleep cycles. IC Role / Device Role / Timing Role: Always-on buck converter with precision enable control and system UVLO via EN/SYNC resistor divider. Use Value: EN pin undervoltage lockout (3.3–3.9 V rising threshold) prevents brownout operation during battery sag; internal soft-start avoids inrush into large modem input capacitance. |
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 | 8-pin HSOIC package, no PGOOD, PFM-only (no FPWM), higher RDS(on) (185/105 mΩ) | Lacks power-good signaling and forced PWM mode - unsuitable for systems requiring deterministic timing or rail monitoring. | Select when cost-sensitive industrial applications do not require automotive-grade PGOOD or EMI-controlled FPWM operation. |
| LMR23630CFPQDRRRQ1 | Same 12-pin WSON package, 3-A output rating, identical FPWM/PGOOD features, slightly higher IQ (85 μA) | Higher current capability enables future-proofing or parallel use; same footprint allows drop-in upgrade where 2.5-A margin is insufficient. | Choose when design requires >2.5-A headroom or anticipates higher downstream loads without PCB redesign. |
Compared with LMR23625CQDDARQ1, the LMR23625CFPQDRRRQ1 adds critical automotive functions (PGOOD, FPWM, wettable flanks) at minor cost premium; versus LMR23630CFPQDRRRQ1, it offers optimal BOM efficiency for verified 2.5-A loads without overdesign.
Availability
LMR23625CFPQDRRRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, USB charging, and ADAS camera power supply applications requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for LMR23625CFPQDRRRQ1 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 automotive qualification expertise and broad manufacturing scale.
The LMR23625CFPQDRRRQ1 belongs to TI's SIMPLE SWITCHER® automotive DC-DC converter family, designed specifically for reliable, low-EMI power conversion in harsh-temperature vehicle environments - emphasizing ease-of-use, internal compensation, and AEC-Q100 compliance from outset.
FAQ
What is the maximum input voltage rating for the LMR23625CFPQDRRRQ1?
The LMR23625CFPQDRRRQ1 has an absolute maximum input voltage rating of 42 V, but its recommended operating input range is 4 V to 36 V. This 36-V upper limit accommodates automotive load-dump transients per ISO 7637-2, ensuring robust operation in 24-V commercial vehicle systems and 12-V passenger cars with worst-case battery fluctuations. Exceeding 36 V continuously may trigger overvoltage protection or degrade long-term reliability.
Does the LMR23625CFPQDRRRQ1 support output voltage adjustment?
Yes, the LMR23625CFPQDRRRQ1 supports adjustable output voltage via an external resistor divider connected to the FB pin. It uses an internal 1-V precision reference, so VOUT = 1 V × (1 + RFBT/RFBB). TI recommends 1% tolerance, low-TC resistors with RFBT between 10 kΩ and 100 kΩ. For example, 3.3-V output requires RFBT = 230 kΩ and RFBB = 100 kΩ. The LMR23625CFPQDRRRQ1 does not support dynamic voltage scaling or I²C programming.
How does the PGOOD function operate on the LMR23625CFPQDRRRQ1?
The PGOOD pin on the LMR23625CFPQDRRRQ1 is an open-drain output that pulls low when the regulated output voltage falls outside a ±3% window around the target (e.g., 4.85–5.15 V for 5-V output). It features 150-μs rise and 18-μs fall deglitching to reject noise-induced false triggers. A 10–100-kΩ pullup resistor to a logic rail ≤12 V is required. PGOOD assertion confirms stable regulation after soft-start and remains active during normal operation of the LMR23625CFPQDRRRQ1.
Can the LMR23625CFPQDRRRQ1 synchronize to an external clock?
Yes, the LMR23625CFPQDRRRQ1 can synchronize its 2.1-MHz internal oscillator to an external clock applied to the EN/SYNC pin via AC coupling. The external signal must have 2.8–5.5 V peak-to-peak amplitude, minimum 100-ns ON/OFF times, and frequency between 200 kHz and 2.2 MHz. A 1-nF capacitor and 100-kΩ Thevenin impedance network is recommended. This capability enables EMI reduction through frequency dithering or alignment with system clocks in the LMR23625CFPQDRRRQ1 design.
What thermal management provisions does the LMR23625CFPQDRRRQ1 include?
The LMR23625CFPQDRRRQ1 incorporates thermal shutdown at 170°C (±8°C) with 15°C hysteresis, plus junction temperature monitoring via thermal metrics including RθJA = 41.5°C/W and RθJC(bot) = 16.3°C/W. Its 12-pin WSON package features an exposed thermal PAD that must be soldered to ≥200 mm² of inner-layer copper pour for effective heat dissipation. Layout guidelines require short, wide traces for VIN, PGND, and SW, and mandatory 2.2-μF ceramic bypass on VCC referenced to the PAD. These provisions ensure reliable 2.5-A operation at +125°C ambient in automotive under-hood applications using the LMR23625CFPQDRRRQ1.
LMR23625CFPQDRRRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 12-WFDFN Exposed Pad
- 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, Wettable Flank
- Supplier Device Package:
- 12-SON (3x3)
LMR23625CFPQDRRRQ1 FAQ
1.How can I place an order for LMR23625CFPQDRRRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR23625CFPQDRRRQ1 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 LMR23625CFPQDRRRQ1 reliable?
The price and inventory of LMR23625CFPQDRRRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR23625CFPQDRRRQ1 is usually 5 days.
3.What payment methods are accepted for LMR23625CFPQDRRRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR23625CFPQDRRRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR23625CFPQDRRRQ1?
LMR23625CFPQDRRRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR23625CFPQDRRRQ1 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 LMR23625CFPQDRRRQ1?
For technical support, including LMR23625CFPQDRRRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR23625CFPQDRRRQ1 requirements.
6.How does Aetrix verify that LMR23625CFPQDRRRQ1 is sourced from the original manufacturer or authorized distributors?
All LMR23625CFPQDRRRQ1 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 LMR23625CFPQDRRRQ1 meets industry standards.
7.What is the process for return or replacement of LMR23625CFPQDRRRQ1?
All LMR23625CFPQDRRRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR23625CFPQDRRRQ1, 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 LMR23625CFPQDRRRQ1 part is unused and in its original packaging.
Return procedure for LMR23625CFPQDRRRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMR23625CFPQDRRRQ1 Tags
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