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Texas Instruments LM53625LQRNLRQ1
- Part No.:
- LM53625LQRNLRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 22-PowerVFQFN
- Datasheet:
-
LM53625LQRNLRQ1.pdf
- Description:
- IC REG BUCK 5V 2.5A 22VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
LM53625LQRNLRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous buck DC-DC converter delivering a fixed 5-V output at up to 2.5 A, operating from 3.9 V to 36 V input with 2.1-MHz switching frequency, ±1% output voltage tolerance over –40°C to +125°C junction temperature, and integrated RESET with 3-ms release timer - used in automotive head units requiring compact, low-EMI power conversion.
For engineers reviewing the LM53625LQRNLRQ1 datasheet, LM53625LQRNLRQ1 pinout, LM53625LQRNLRQ1 application, or LM53625LQRNLRQ1 equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade thermal and EMI performance, and real-world selection guidance for telematics and instrumentation cluster designs.
Technical Context
The LM53625LQRNLRQ1 employs peak-current-mode control with adaptive frequency spreading to maintain regulation down to 300-mV dropout at 3.5 A while sustaining 2.1-MHz operation across wide VIN–VOUT ratios - enabling stable 5-V output from 5.6-V input. Its HotRod QFN package minimizes parasitic inductance, reducing switch-node ringing and radiated EMI without external filtering.
It integrates internal compensation, soft-start (3.2 ms), thermal shutdown (155°C trip), and a true open-drain RESET output with built-in 25-µs glitch filter and 3-ms assertion delay - eliminating need for external supervisory ICs in automotive infotainment systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5 V, ±1% tolerance over –40°C to +125°C TJ - ensures stable MCU core rail in instrument clusters. |
| Max Output Current | 2.5 A continuous - supports dual-display head unit subsystems without derating at 105°C ambient. |
| Input Voltage Range | 3.9 V to 36 V, with 42-V transient tolerance ≤500 ms - simplifies surge protection for 12-V automotive battery rails. |
| Switching Frequency | 2.1 MHz nominal, ±3% spread-spectrum option - places noise above AM band, reducing EMI filter size/cost. |
| Quiescent Current | 15 µA typical at no load (3.3-V output variant); 20 µA typical for 5-V output - enables always-on telematics modules. |
| RESET Function | Open-drain output with 3-ms release timer and 12–45 µs internal glitch filter - provides reliable system power-good signaling. |
| Junction Temp Range | –40°C to +150°C - qualified for under-hood and dashboard-mounted applications per AEC-Q100 Grade 1. |
Pinout & Package
LM53625LQRNLRQ1 uses a 5.0-mm × 4.0-mm VQFN-HR (22-pin) package with wettable flanks for automated optical solder-joint inspection. Thermal resistance: RθJA = 29.4°C/W, RθJC(bot) = 2.4°C/W.
| 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 to drive high-side MOSFET gate reliably. |
| SYNC | External clock input | Accepts 1.9–2.3 MHz system clock (rising-edge triggered) for synchronization across multiple rails. |
| PVIN1 / PVIN2 | Main power inputs | Parallel-connected VIN pins reduce IR drop and improve current sharing; bypass directly to PGND. |
| SW | Switch node | Connects to power inductor; waveform optimized via HotRod layout to minimize ringing and EMI. |
| PGND1 / PGND2 | Power ground terminals | Eight dedicated PGND pins tied together on PCB - critical for low-noise return path and thermal dissipation. |
| FB | Feedback input | Internally connected to 5-V divider; no external resistor network required for fixed-output configuration. |
| BIAS | Auxiliary bias supply input | Connected to output rail to improve light-load efficiency and enable fast transient response. |
| FPWM | Forced PWM mode control | High = constant 2.1-MHz switching; low = automatic diode-emulation light-load mode. |
| EN | Enable input | Active-high logic; threshold 1.7–2.0 V; hysteresis 0.45–0.55 V prevents chatter during slow-rising battery inputs. |
| RESET | Open-drain fault indicator | Asserts low on UVLO, thermal shutdown, or EN deactivation; requires external pull-up for system reset logic. |
| AGND | Analog reference ground | Single-point connection to PGND on PCB; all precision measurements referenced here. |
Key Features
| Feature | Design Value |
|---|---|
| Spread-spectrum modulation | ±3% frequency dithering reduces peak EMI by >10 dB, easing CISPR 25 Class 5 compliance. |
| Integrated RESET with timing | 3-ms release delay and 25-µs internal filter eliminate need for external RC timing or supervisor ICs. |
| HotRod QFN with wettable flanks | Flip-chip construction lowers parasitic inductance by >50% vs standard QFN, minimizing switch-node overshoot. |
| Low dropout capability | Maintains 5-V regulation with only 300-mV VIN–VOUT differential at 3.5 A - enables operation during cold-crank events. |
| Pin-selectable FPWM mode | Hardware-controlled forced PWM eliminates audible noise and ensures predictable EMI profile in noise-sensitive cabins. |
Applications
| Telematics Control Unit | Automotive Head Unit |
|---|---|
Use Scenario: Powering GPS, cellular modem, and microcontroller in vehicle connectivity modules with strict EMI limits. IC Role / Device Role / Timing Role: Primary 5-V buck regulator supplying SoC I/O, memory, and RF front-end with synchronized switching. Use Value: Spread-spectrum operation and HotRod layout meet CISPR 25 radiated emissions requirements without added shielding. |
Use Scenario: Delivering clean, regulated 5-V rail to display controller, audio DSP, and touch interface in infotainment head units. IC Role / Device Role / Timing Role: Fixed-output DC-DC converter with integrated RESET providing power-good signal to main application processor. Use Value: Eliminates external supervisor IC and reduces BOM count by one component while maintaining AEC-Q100 reliability. |
| Instrument Cluster Display | Battery-Powered Diagnostic Tool |
Use Scenario: Supplying 5-V logic rail to TFT LCD driver and CAN transceiver in digital instrument clusters exposed to wide temperature swings. IC Role / Device Role / Timing Role: Automotive-grade buck converter operating from 5.6–16 V battery input with 150°C junction rating. Use Value: ±1% output accuracy and –40°C to +125°C ambient operation ensure display brightness and CAN communication stability across climates. |
Use Scenario: Enabling portable OBD-II diagnostic tools powered directly from vehicle battery with ultra-low standby consumption. IC Role / Device Role / Timing Role: High-efficiency step-down regulator with 20-µA quiescent current in 5-V fixed mode for always-on monitoring. Use Value: 15–20 µA no-load IQ extends battery life beyond 100 hours in sleep mode without compromising startup time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM53635LQRNLRQ1 | 3.5-A rated output, higher current limit (4.5–6 A HS), same 5-V fixed output and spread-spectrum capability | Supports higher-power head units with integrated amplifiers or multi-core processors | Select when load exceeds 2.5 A or future-proofing for higher-current variants is required |
| TPS54360BQDDARQ1 | 3.5-A, 60-V max input, adjustable output, no integrated RESET or spread spectrum; 2.2-MHz capable | Used where wider input range (e.g., 24-V commercial vehicles) or programmable VOUT is needed | Choose when 42-V transients exceed LM53625LQRNLRQ1's 36-V rating or RESET functionality is handled externally |
Compared with LM53635LQRNLRQ1, the LM53625LQRNLRQ1 offers lower cost and footprint for sub-2.5-A loads; versus TPS54360BQDDARQ1, it trades input voltage headroom for integrated features like RESET and EMI reduction - optimizing for compact, certified automotive modules.
Availability
LM53625LQRNLRQ1 is available at Aetrix Electronics and suitable for automotive telematics, head unit power management, and instrumentation cluster designs requiring stable component supply, AEC-Q100 qualification, and long-term production continuity.
Supply support for LM53625LQRNLRQ1 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 product line delivers high-frequency, low-EMI synchronous buck regulators optimized for automotive infotainment, ADAS, and body electronics - emphasizing AEC-Q100 reliability, thermal robustness, and system-level integration.
FAQ
What is the maximum input voltage rating for LM53625LQRNLRQ1?
The LM53625LQRNLRQ1 has an absolute maximum input voltage rating of 40 V across AVIN, PVIN1, and PVIN2 pins. It supports transient conditions up to 42 V for ≤500 ms at ≤0.01% duty cycle, making it suitable for 12-V automotive systems with load-dump protection requirements. Continuous operation is specified from 3.9 V to 36 V, with full functionality maintained down to 3.55 V input for 5-V output.
Does LM53625LQRNLRQ1 require external compensation components?
No, the LM53625LQRNLRQ1 features fully integrated compensation circuitry. Its peak-current-mode architecture with internal error amplifier and PWM comparator eliminates the need for external compensation networks - reducing design complexity, board space, and component count. This is confirmed in the datasheet Section 8.1 and typical application schematics.
How does the RESET output function on LM53625LQRNLRQ1?
The LM53625LQRNLRQ1 provides an open-drain RESET output that asserts low during undervoltage lockout, thermal shutdown, or when EN is pulled low. It includes a built-in 25–45 µs glitch filter and a 2–4 ms release delay after fault clearance. The RESET pin requires an external pull-up resistor to a valid logic voltage and serves as a system power-good indicator without needing additional supervisor ICs.
Is LM53625LQRNLRQ1 pin-compatible with other devices in the LM536xx-Q1 family?
Yes, all LM53625-Q1 and LM53635-Q1 variants share identical 22-pin VQFN-HR (RNL) packaging and pinout, including LM53625LQRNLRQ1, LM53635LQRNLRQ1, and adjustable versions. This allows direct substitution within the same footprint when upgrading output current or adjusting spread-spectrum enablement - provided thermal and electrical margins are verified for the new variant.
What thermal performance can be expected from LM53625LQRNLRQ1 in a standard 4-layer PCB layout?
In a standard 4-layer PCB with 2 oz copper, 1-in² thermal pad connected to internal ground planes, the LM53625LQRNLRQ1 achieves RθJA ≈ 29.4°C/W and RθJB ≈ 5.4°C/W. At 2.5-A load and 13.5-V input, typical junction-to-ambient rise is ~45°C - well within the –40°C to +150°C operational range. Layout guidelines in Section 11 of the datasheet specify minimum copper area and via count for optimal thermal performance.
LM53625LQRNLRQ1 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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.9V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- 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)
LM53625LQRNLRQ1 FAQ
1.How can I place an order for LM53625LQRNLRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM53625LQRNLRQ1 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 LM53625LQRNLRQ1 reliable?
The price and inventory of LM53625LQRNLRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM53625LQRNLRQ1 is usually 5 days.
3.What payment methods are accepted for LM53625LQRNLRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM53625LQRNLRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM53625LQRNLRQ1?
LM53625LQRNLRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM53625LQRNLRQ1 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 LM53625LQRNLRQ1?
For technical support, including LM53625LQRNLRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM53625LQRNLRQ1 requirements.
6.How does Aetrix verify that LM53625LQRNLRQ1 is sourced from the original manufacturer or authorized distributors?
All LM53625LQRNLRQ1 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 LM53625LQRNLRQ1 meets industry standards.
7.What is the process for return or replacement of LM53625LQRNLRQ1?
All LM53625LQRNLRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM53625LQRNLRQ1, 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 LM53625LQRNLRQ1 part is unused and in its original packaging.
Return procedure for LM53625LQRNLRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM53625LQRNLRQ1 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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