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Texas Instruments LM53625MQRNLRQ1
- Part No.:
- LM53625MQRNLRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 22-PowerVFQFN
- Datasheet:
-
LM53625MQRNLRQ1.pdf
- Description:
- IC REG BUCK ADJ 2.5A 22VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,197
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Product details
Overview
LM53625MQRNLRQ1 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 (–40°C to 125°C), and 15-µA quiescent current at no load with 3.3-V output - used in telematics power rails requiring low EMI and spread-spectrum operation.
For engineers reviewing the LM53625MQRNLRQ1 datasheet, LM53625MQRNLRQ1 pinout, LM53625MQRNLRQ1 application, or LM53625MQRNLRQ1 equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade thermal and ESD specs, and real-world design implications for head unit and instrumentation cluster power supplies.
Technical Context
The LM53625MQRNLRQ1 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 across wide VIN/VOUT ratios - enabling 18 V → 3.3 V conversion without external compensation. Its HotRod QFN package with wettable flanks minimizes parasitic inductance, reducing switch-node ringing and radiated EMI.
It integrates a true open-drain RESET output with internal 3-ms release timer and glitch filtering (12–45 µs), eliminating need for external supervisory ICs; FPWM pin enables forced PWM mode to suppress light-load frequency variation, and SYNC input supports system-level clock synchronization between 1.9 MHz and 2.3 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.9 V to 36 V (with 42-V transient tolerance ≤500 ms); enables direct battery connection in 12-V/24-V automotive systems. |
| Output Current | 2.5 A continuous (LM53625-Q1 variant); supports instrument cluster microcontrollers and display drivers without derating at 105°C ambient. |
| Switching Frequency | 2.1 MHz nominal (±3% spread-spectrum option); places fundamental switching above AM band to reduce input filter size and cost. |
| Quiescent Current | 15 µA typical at no load (3.3-V output); eliminates need for backup LDO in always-on telematics modules. |
| Output Accuracy | ±1% over –40°C to +125°C junction temperature; ensures stable ADC reference and sensor biasing across full automotive ambient range. |
| Dropout Voltage | 0.6 V at 3.5 A and 105°C TA; maintains regulation during cold-crank transients where input dips near output level. |
| RESET Delay | 3-ms release timer after startup; provides clean, debounced power-good signal for MCU boot sequencing without external RC network. |
Pinout & Package
LM53625MQRNLRQ1 uses a 5.0-mm × 4.0-mm VQFN-HR (RNL) package with 22 pins and wettable flanks for automated optical solder-joint inspection.
| 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 and noise rejection. |
| CBOOT | Bootstrap capacitor node | Connects 470-nF ceramic capacitor to SW; critical for high-side MOSFET gate drive integrity during duty cycles >80%. |
| SYNC | External clock synchronization input | Accepts 1.9–2.3 MHz system clock (rising-edge triggered); enables EMI reduction via multi-converter phase alignment. |
| PVIN1 / PVIN2 | Main power input terminals | Dual high-current VIN pins reduce PCB trace inductance; must be shorted directly on board with low-inductance layout. |
| SW | Switch node | Connects to power inductor; high di/dt node requiring minimized loop area to suppress EMI and voltage overshoot. |
| PGND1 / PGND2 | Power ground terminals (8 total) | Low-inductance return paths for internal MOSFETs; must be tied together and connected to AGND at single point to avoid ground bounce. |
| FB | Feedback input | For adjustable version: connects to resistor divider; sets output via 1.0-V internal reference (±0.5% over temp). |
| EN | Enable control input | Active-high logic; threshold 1.7–2.0 V rising; hysteresis 0.45–0.55 V prevents chatter during slow-rising supply ramps. |
| RESET | Open-drain reset flag | Asserts low during fault or EN=low; internal 3-ms timer ensures clean release; sink capability ≥1 mA at 0.4 V. |
| FPWM | Forced PWM mode control | High = fixed 2.1-MHz operation; low = automatic light-load PFM/diode emulation; prevents audible switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Spread-spectrum modulation | ±3% frequency dithering reduces peak EMI by >10 dB; enabled by default in LM53625MQRNLRQ1 ('M' suffix denotes spread-spectrum support). |
| Integrated RESET with filtering | Built-in 3-ms release timer and 12–45 µs glitch filter eliminate external supervisor IC and RC network - saving 3 mm² PCB area and BOM cost. |
| HotRod QFN with wettable flanks | Flip-chip construction lowers parasitic inductance by >50% vs standard QFN; enables cleaner switch-node waveforms and <100 mV overshoot at 3.5-A load step. |
| Ultra-low quiescent current | 15 µA typical at no load (3.3-V output); sustains >10-year battery life in always-on vehicle tracking modules without auxiliary LDO. |
| Wide-input transient tolerance | Withstands 42-V transients ≤500 ms per ISO 7637-2 Pulse 5a; simplifies front-end TVS selection and reduces system-level surge protection complexity. |
Applications
| Telematics Power Supply | Head Unit Core Rail |
|---|---|
Use Scenario: Powering LTE modem, GNSS receiver, and CAN interface in automotive telematics control unit (TCU) with always-on requirement and cold-crank resilience. IC Role / Device Role / Timing Role: Primary 3.3-V/2.5-A buck regulator supplying digital baseband and RF subsystems; operates in forced PWM mode during data transmission bursts. Use Value: 15-µA IQ extends backup battery life; spread spectrum meets CISPR 25 Class 5 radiated emissions limits without added shielding. |
Use Scenario: Generating stable 5-V rail for infotainment SoC, touch controller, and audio codec in premium vehicle head unit with high ambient temperature exposure. IC Role / Device Role / Timing Role: Main system power converter with SYNC input locked to SoC clock domain to minimize beat-frequency interference in audio band. Use Value: ±1% output accuracy ensures consistent ADC sampling and sensor calibration; 0.6-V dropout maintains regulation during 6-V cold-crank events. |
| Instrumentation Cluster Display | ADAS Camera Module Supply |
Use Scenario: Delivering 3.3-V/2.5-A power to TFT-LCD driver, microcontroller, and backlight LED controller in digital instrument cluster operating at –40°C to +125°C. IC Role / Device Role / Timing Role: High-reliability buck regulator with AEC-Q100 Grade 1 qualification and 150°C junction rating; RESET output monitors health of entire cluster subsystem. Use Value: Wettable-flank VQFN enables AOI-based solder-joint verification; built-in thermal shutdown (155–175°C) prevents latch-up under prolonged overtemperature. |
Use Scenario: Providing clean, low-noise 5-V supply to image sensor and ISP in rear-view or surround-view camera module exposed to engine bay heat and vibration. IC Role / Device Role / Timing Role: EMI-optimized buck converter with minimized switch-node ringing; CBOOT/SW layout optimized per TI's RNL footprint guidelines. Use Value: Low EMI and 2.1-MHz switching prevent switching artifacts in analog video path; 42-V transient tolerance handles load-dump surges without shutdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM536253QRNLRQ1 | Fixed 3.3-V output; no spread-spectrum; same 2.5-A rating and VQFN package. | Used where EMI requirements are less stringent and output voltage is fixed; eliminates FB resistor divider. | Select when system does not require spread-spectrum EMI reduction and 3.3-V output suffices without adjustment. |
| LM53635MQRNLRQ1 | 3.5-A output current; identical spread-spectrum, SYNC, RESET, and package; higher current limit (IL-HS = 4.5–6 A). | Suitable for higher-power ADAS ECUs or radar modules needing >2.5 A at 5 V or 3.3 V. | Choose when load current exceeds 2.5 A or future-proofing for higher-power derivatives is required. |
Compared with LM536253QRNLRQ1, LM53625MQRNLRQ1 trades fixed-output simplicity for EMI mitigation; compared with LM53635MQRNLRQ1, it offers lower cost and thermal margin for 2.5-A applications without sacrificing spread-spectrum or automotive qualification.
Availability
LM53625MQRNLRQ1 is available at Aetrix Electronics and suitable for automotive telematics, head unit, and instrumentation cluster designs requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for LM53625MQRNLRQ1 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 automotive-grade power management ICs with decades of automotive qualification expertise.
The LM53625-Q1 belongs to TI's automotive-qualified DC-DC buck converter family, designed specifically for demanding 12-V/24-V vehicle subsystems requiring low EMI, high efficiency, and robust thermal performance across –40°C to +150°C junction temperatures.
FAQ
What is the maximum input voltage transient tolerance for LM53625MQRNLRQ1?
The LM53625MQRNLRQ1 withstands 42-V input transients for durations ≤500 ms at a duty cycle ≤0.01%, complying with ISO 7637-2 Pulse 5a for automotive load-dump protection - enabling simplified front-end protection without oversized TVS diodes.
Does LM53625MQRNLRQ1 support adjustable output voltage?
Yes, LM53625MQRNLRQ1 is the adjustable-output variant ('A' in device comparison table); it uses an internal 1.0-V reference and FB pin to set output from 3.3 V to 10 V via external resistor divider - unlike fixed-output versions such as LM536253QRNLRQ1 (3.3 V) or LM536255QRNLRQ1 (5 V).
What package type and dimensions does LM53625MQRNLRQ1 use?
LM53625MQRNLRQ1 uses the VQFN-HR (RNL) package: 5.0 mm × 4.0 mm body size, 22-pin configuration, with wettable flanks for automated optical inspection - distinct from non-wettable variants like LM53625MQURNLRQ1.
How does the RESET function operate in LM53625MQRNLRQ1?
The LM53625MQRNLRQ1 provides an open-drain RESET output that goes low during EN deactivation, output undervoltage, or thermal shutdown; it features a built-in 3-ms release timer and 12–45 µs glitch filter - eliminating need for external RC timing networks or supervisors.
Is LM53625MQRNLRQ1 pin-compatible with other LM53625-Q1 variants?
Yes, all LM53625-Q1 variants including LM53625MQRNLRQ1 share identical VQFN-HR (RNL) 22-pin pinout and footprint - enabling drop-in replacement across fixed/adjustable, spread-spectrum/no-spread-spectrum, and wettable/non-wettable flank options without PCB redesign.
LM53625MQRNLRQ1 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 ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 22-VQFN-HR (5x4)
LM53625MQRNLRQ1 FAQ
1.How can I place an order for LM53625MQRNLRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM53625MQRNLRQ1 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 LM53625MQRNLRQ1 reliable?
The price and inventory of LM53625MQRNLRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM53625MQRNLRQ1 is usually 5 days.
3.What payment methods are accepted for LM53625MQRNLRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM53625MQRNLRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM53625MQRNLRQ1?
LM53625MQRNLRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM53625MQRNLRQ1 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 LM53625MQRNLRQ1?
For technical support, including LM53625MQRNLRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM53625MQRNLRQ1 requirements.
6.How does Aetrix verify that LM53625MQRNLRQ1 is sourced from the original manufacturer or authorized distributors?
All LM53625MQRNLRQ1 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 LM53625MQRNLRQ1 meets industry standards.
7.What is the process for return or replacement of LM53625MQRNLRQ1?
All LM53625MQRNLRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM53625MQRNLRQ1, 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 LM53625MQRNLRQ1 part is unused and in its original packaging.
Return procedure for LM53625MQRNLRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM53625MQRNLRQ1 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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