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Texas Instruments LM53625MQURNLRQ1
- Part No.:
- LM53625MQURNLRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 22-PowerVFQFN
- Datasheet:
-
LM53625MQURNLRQ1.pdf
- Description:
- IC REG BUCK ADJ 2.5A 22VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
LM53625MQURNLRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous buck DC-DC converter delivering up to 2.5 A at 36 V input, 2.1 MHz fixed switching frequency, ±1% output voltage accuracy over –40°C to +125°C, and 15 µA quiescent current (typical) with 3.3-V output - used in telematics power rails requiring low EMI and high reliability.
For engineers reviewing the LM53625MQURNLRQ1 datasheet, LM53625MQURNLRQ1 pinout, LM53625MQURNLRQ1 application, or LM53625MQURNLRQ1 equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade thermal and EMI performance, and real-world alternative selection guidance for safety-critical 12-V/24-V vehicle systems.
Technical Context
The LM53625MQURNLRQ1 implements peak-current-mode control with adaptive frequency spreading to maintain regulation down to 300-mV dropout at 3.5 A while preserving 2.1-MHz operation above 3.55-V input. Its HotRod QFN package minimizes parasitic inductance, reducing switch-node ringing and radiated EMI without external filters.
It integrates internal compensation, soft-start, thermal shutdown, UVLO, and a filtered open-drain RESET output with 3-ms release timer and ±3% hysteresis. The adjustable-output variant uses a 1-V reference (±0.5% over temperature) and supports external synchronization between 1.9–2.3 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2.5 A continuous; supports automotive instrumentation cluster loads with transient headroom up to 6.5-A peak high-side limit. |
| Input Voltage Range | 3.55 V to 36 V; withstands 42-V transients ≤500 ms, easing surge protection in 12-V/24-V battery systems. |
| Switching Frequency | 2.1 MHz nominal; stays above AM band (0.53–1.71 MHz) to minimize input filter size and cost. |
| Quiescent Current | 15 µA typical at no load (3.3-V output); enables always-on telematics modules without auxiliary LDO. |
| Output Accuracy | ±1% over –40°C to +125°C junction; ensures stable MCU/SOC supply across full automotive ambient range. |
| Package | VQFN-HR (22-pin), 5.0 mm × 4.0 mm, non-wettable flanks; optimized for automated optical inspection (AOI) in high-reliability PCB assembly. |
| RESET Function | Open-drain output with built-in 12–45 µs glitch filter and 2–4 ms activation delay; replaces discrete supervisor ICs in head unit power sequencing. |
Pinout & Package
VQFN-HR (22-pin) package, 5.0 mm × 4.0 mm body, 0.6-mm pin pitch, non-wettable flanks - designed for AOI-compatible solder joint inspection without X-ray.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Internal 3.1-V LDO output | Supplies internal control circuitry; requires 4.7-µF capacitor to AGND for stability. |
| CBOOT | Bootstrap capacitor node | Connects 470-nF capacitor to SW; enables high-side MOSFET gate drive during each switching cycle. |
| SYNC | External clock input | Accepts 1.9–2.3 MHz system clock (rising-edge triggered); synchronizes switching to avoid beat frequencies. |
| PVIN1 / PVIN2 | Main power inputs | Dual VIN pins reduce trace inductance; must be shorted together on PCB near input capacitors. |
| SW | Switch node | Connects directly to power inductor; high dv/dt node requiring tight layout to minimize EMI. |
| PGND1 / PGND2 | Power ground terminals | Eight dedicated PGND pins lower ground loop inductance; must tie to AGND at single point. |
| FB | Feedback input | Monitors output via resistor divider; sets adjustable output using internal 1-V reference. |
| EN | Enable control | Active-high logic input; 1.7–2.0 V threshold with 0.5 V hysteresis; supports direct connection to VIN. |
| RESET | Open-drain fault flag | Asserts low on UVLO, thermal shutdown, or EN deactivation; requires external pull-up resistor. |
| FPWM | Forced PWM mode select | High = fixed 2.1-MHz operation; low = automatic light-load PFM mode; must not float. |
| BIAS | Auxiliary bias supply input | Connects to output rail; improves efficiency by powering internal circuits from regulated output. |
| AVIN | Analog supply input | Tied to PVIN on PCB; supplies analog circuitry including error amplifier and reference. |
Key Features
| Feature | Design Value |
|---|---|
| Spread-spectrum modulation | ±3% frequency dithering reduces peak EMI amplitude by >10 dB, enabling compliance with CISPR 25 Class 5. |
| Integrated RESET with filtering | On-chip 12–45 µs glitch filter and 2–4 ms release timer eliminate need for external RC network or supervisor IC. |
| HotRod QFN package | Flip-chip construction lowers parasitic inductance by >50% vs standard QFN, minimizing switch-node overshoot and layout sensitivity. |
| Low dropout capability | Maintains regulation with only 300-mV VIN–VOUT differential at 3.5 A, supporting cold-crank operation down to 6 V input. |
| Pin-selectable FPWM mode | Single logic-level input disables light-load PFM, ensuring constant 2.1-MHz switching for noise-sensitive audio or radar subsystems. |
Applications
| Telematics Control Unit | Automotive Head Unit |
|---|---|
|
Use Scenario: Powers LTE modem, GNSS receiver, and CAN interface in connected car gateway modules operating continuously with battery backup. IC Role / Device Role / Timing Role: Primary 3.3-V/5-V buck regulator supplying SoC core and I/O rails; provides synchronized RESET for safe boot sequence. Use Value: 15-µA quiescent current extends battery life during sleep; spread spectrum meets OEM EMI limits without ferrite beads. |
Use Scenario: Delivers clean 3.3-V supply to infotainment processor and display controller in dash-mounted multimedia systems. IC Role / Device Role / Timing Role: High-efficiency step-down converter with FPWM mode enabled to prevent audible switching noise in audio amplifiers. Use Value: 2.1-MHz operation allows use of 1-µH inductors and 22-µF ceramic output caps, shrinking total solution size by 40% vs 500-kHz alternatives. |
| Instrument Cluster Display | ADAS Camera Power Module |
|
Use Scenario: Supplies 5-V rail to TFT LCD driver and microcontroller in digital instrument clusters exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Automotive-grade buck regulator with ±1% output accuracy and 150°C max junction rating for under-hood proximity. Use Value: AEC-Q100 Grade 1 qualification and 125°C ambient operation ensure reliability across all vehicle climates without derating. |
Use Scenario: Provides isolated 3.3-V supply to image sensor and ISP in rear-view or surround-view camera modules mounted externally. IC Role / Device Role / Timing Role: Input-transient-tolerant buck converter handling 42-V load-dump events; RESET signal triggers camera re-initialization after fault recovery. Use Value: 36-V max input with 42-V transient rating eliminates need for upstream TVS diodes, reducing BOM count and board space. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM53635MQURNLRQ1 | 3.5-A rated output (vs 2.5 A), higher peak current limits (4.5–7.5 A), identical pinout and features. | Required where sustained >2.5-A load current or higher short-circuit robustness is needed (e.g., multi-rail ADAS ECUs). | Select when higher output current headroom is required; drop-in replacement with same layout and firmware. |
| TPS543620RTWR | 3.5-A, 36-V, 2.1-MHz buck with integrated FETs but no spread spectrum; 12-pin WQFN vs 22-pin VQFN; no RESET output. | Suitable for cost-sensitive industrial applications where EMI filtering is handled externally and supervisor function is omitted. | Choose if RESET and EMI reduction are non-critical; requires PCB redesign due to different pin count and layout. |
Compared with LM53635MQURNLRQ1, the LM53625MQURNLRQ1 offers matched footprint and feature set at lower current rating - ideal for space-constrained telematics modules. Versus TPS543620RTWR, it delivers superior automotive qualification, integrated RESET, and proven spread-spectrum EMI suppression without layout changes.
Availability
LM53625MQURNLRQ1 is available at Aetrix Electronics and suitable for telematics control units, automotive head units, and instrument cluster displays requiring stable component supply, AEC-Q100 compliance, and long-term automotive lifecycle support.
Supply support for LM53625MQURNLRQ1 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 power management expertise and ISO/TS 16949-certified manufacturing.
The LM536xx-Q1 product line targets high-reliability automotive power conversion, delivering compact, low-EMI, AEC-Q100-compliant DC-DC solutions for infotainment, ADAS, and body electronics.
FAQ
What is the maximum input voltage transient tolerance for LM53625MQURNLRQ1?
The LM53625MQURNLRQ1 sustains 42-V input transients for up to 500 ms at ≤0.01% duty cycle, per its absolute maximum ratings. This enables direct connection to 12-V/24-V automotive batteries without external TVS clamping in most load-dump scenarios - a key design advantage confirmed in TI's SNVSAA7B datasheet Section 7.1.
Does LM53625MQURNLRQ1 support adjustable output voltage?
Yes, LM53625MQURNLRQ1 is the adjustable-output variant of the LM53625-Q1 family, featuring a precision 1.0-V internal reference (±0.5% over temperature) and FB pin for external resistor-divider configuration. Output can be set from 3.3 V to 10 V, as specified in Section 7.5 (VREF) and Section 7.6 of the datasheet.
What package type does LM53625MQURNLRQ1 use, and does it have wettable flanks?
LM53625MQURNLRQ1 uses the VQFN-HR (22-pin) package, 5.0 mm × 4.0 mm, with non-wettable flanks - explicitly confirmed in Table 5-1 of the datasheet. This variant supports automated optical inspection (AOI) without requiring X-ray, distinguishing it from wettable-flank versions like LM53625MQRNLRQ1.
How does the spread-spectrum feature work in LM53625MQURNLRQ1?
LM53625MQURNLRQ1 applies ±3% frequency dithering centered at 2.1 MHz (FSW-SS = 1.81 MHz min), modulated at 9 Hz (FPSS), to reduce peak radiated emissions. This occurs automatically as off-time approaches minimum - not user-configurable - and is validated in Figure 7-2 and Section 8.5 of the datasheet.
Is LM53625MQURNLRQ1 pin-compatible with LM53635-Q1 devices?
Yes, LM53625MQURNLRQ1 and LM53635-Q1 share identical VQFN-HR (22-pin) footprints, pin assignments, and functional pin definitions - confirmed in Section 6 (Pin Configuration) and Table 5-1/5-2. The only differences are output current rating (2.5 A vs 3.5 A) and corresponding current-limit thresholds.
LM53625MQURNLRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 22-PowerVFQFN
- 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):
- 3.9V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- 10V
- Current - Output:
- 2.5A
- Frequency - Switching:
- 2.1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 22-VQFN-HR (5x4)
LM53625MQURNLRQ1 FAQ
1.How can I place an order for LM53625MQURNLRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM53625MQURNLRQ1 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 LM53625MQURNLRQ1 reliable?
The price and inventory of LM53625MQURNLRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM53625MQURNLRQ1 is usually 5 days.
3.What payment methods are accepted for LM53625MQURNLRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM53625MQURNLRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM53625MQURNLRQ1?
LM53625MQURNLRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM53625MQURNLRQ1 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 LM53625MQURNLRQ1?
For technical support, including LM53625MQURNLRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM53625MQURNLRQ1 requirements.
6.How does Aetrix verify that LM53625MQURNLRQ1 is sourced from the original manufacturer or authorized distributors?
All LM53625MQURNLRQ1 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 LM53625MQURNLRQ1 meets industry standards.
7.What is the process for return or replacement of LM53625MQURNLRQ1?
All LM53625MQURNLRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM53625MQURNLRQ1, 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 LM53625MQURNLRQ1 part is unused and in its original packaging.
Return procedure for LM53625MQURNLRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM53625MQURNLRQ1 Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
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