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Texas Instruments LM61495QRPHRQ1
- Part No.:
- LM61495QRPHRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 16-PowerVFQFN
- Datasheet:
-
LM61495QRPHRQ1.pdf
- Description:
- IC REG BUCK ADJ 10A 16VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:9,622
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Product details
Overview
LM61495QRPHRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous buck converter delivering up to 10 A output current, operating from 3 V to 36 V input, with adjustable or fixed output (1 V to 95% VIN), and optimized for low EMI in infotainment and ADAS power rails.
For engineers reviewing the LM61495QRPHRQ1 datasheet, LM61495QRPHRQ1 pinout, LM61495QRPHRQ1 application, or LM61495QRPHRQ1 equivalent, key selection criteria include its 2.2 MHz/400 kHz selectable switching frequency, 5 µA auto-mode quiescent current, 4.5 mm × 3.5 mm wettable-flank QFN package, RESET output with filtered delayed release, and pin-configurable spread spectrum for CISPR 25 Class 5 compliance.
Technical Context
The LM61495QRPHRQ1 implements a current-mode control architecture with integrated high-side (21 mΩ typ) and low-side (13 mΩ typ) MOSFETs, supporting fixed-frequency PWM, PFM light-load operation, and external synchronization via SYNC/MODE pin. Its dual-random spread spectrum (±4% typical) combines triangular and pseudorandom modulation to suppress peak emissions without increasing output ripple.
Thermal performance is enhanced by dual-side cooling capability-pin-to-pin compatible with LM61480T-Q1 and LM61495T-Q1-and a 21.6°C/W θJA measured on the LM61495RPHEVM. The device features built-in soft-start, thermal shutdown (158°C trip), UVLO (3.7 V start-up), and hiccup-mode overcurrent protection with 14–20 A short-circuit high-side current limit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 10 A continuous - supports high-power automotive loads like display backlight drivers and radar SoCs without external current boosting. |
| Input Voltage Range | 3 V to 36 V - handles cold-crank (down to 3 V post-startup) and load-dump transients up to 42 V for 100 ms. |
| Switching Frequency | 200 kHz to 2.2 MHz (adjustable via RT pin) or fixed 400 kHz / 2.2 MHz - enables layout optimization above/below AM band and minimizes filter size. |
| Quiescent Current | 5 µA in auto mode - extends battery life in always-on vehicle modules such as telematics and domain controllers. |
| EMI Features | Pin-configurable spread spectrum + adjustable SW rise time + symmetrical low-inductance pinout - achieves CISPR 25 Class 5 compliance without shielding. |
| Package | 16-pin VQFN-HR (RPH), 4.5 mm × 3.5 mm with wettable flanks - enables automated optical inspection and dual-side PCB cooling. |
| RESET Output | Open-drain with 1.2–3.75 ms filtered delay and ±2.5% hysteresis - provides reliable system power-good signaling without external RC networks. |
Pinout & Package
LM61495QRPHRQ1 uses a 4.5 mm × 3.5 mm, 16-pin VQFN-HR (RPH) package with wettable flanks for solder-joint inspection and dual-side thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1, VIN2 | Power input terminals | Dual high-current inputs reduce loop inductance and improve EMI; must be low-impedance connected and bypassed separately to PGND1/PGND2. |
| PGND1, PGND2 | Power ground terminals | Separate low-side MOSFET return paths; require direct, low-inductance connection to VIN bypass capacitors and system ground plane. |
| SW | Switch node | Connects to output inductor; voltage swings from near-GND to VIN; critical for EMI layout and thermal path to exposed pad. |
| FB | Feedback input | Senses regulated output voltage; connects to resistor divider tap (adjustable) or internal reference (fixed versions); 1 V nominal reference. |
| EN | Enable input | Logic-level enable with 1.263 V threshold and 0.5 V hysteresis; supports precision UVLO configuration when tied to VIN through resistor divider. |
| RESET | Open-drain power-good output | Asserts low during fault or EN=low; includes internal filtering and 1.2–3.75 ms release delay; requires external pull-up for logic-level interface. |
| RT | Frequency setting input | Resistor-to-GND sets fSW from 200 kHz–2.2 MHz; connect to VCC for 400 kHz, GND for 2.2 MHz; no floating allowed. |
| SPSP | Spread spectrum control | Connect to VCC or resistor-to-GND to enable tone-corrected spread spectrum; GND disables modulation; prevents floating. |
| SYNC/MODE | Operation mode selector | Selects Auto (PFM/PWM), FPWM, or external sync; rising-edge triggered; internal 100 kΩ pulldown ensures defined state. |
| BIAS | Bias supply input | Accepts 3.3–12 V external bias or ties to output for improved efficiency; reduces internal LDO losses vs. VCC-only operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Rated for –40°C to +125°C ambient operation - validated for under-hood and cockpit applications with full parametric spec across junction range. |
| Dual-random spread spectrum (DRSS) | ±4% frequency hopping with tone correction - reduces peak EMI by >10 dB while maintaining <0.5% output ripple increase. |
| Adjustable SW node rise time | Controlled via RBOOT (0–100 Ω) between SW and CBOOT - allows fine-tuning of EMI vs. efficiency trade-off without changing layout. |
| Auto-mode light-load operation | Transitions seamlessly between FPWM and PFM - delivers 5 µA IQ at no load while maintaining tight output regulation and fast transient response. |
| Integrated protection suite | Includes hiccup-mode OCP (14–20 A HS limit), thermal shutdown (158°C), UVLO (3.7 V), and output overvoltage lockout - eliminates need for discrete protection ICs. |
Applications
| Automotive Infotainment Power Supply | Instrument Cluster DC-DC Stage |
|---|---|
|
Use Scenario: Powers SoC, GPU, and display interfaces in head-unit systems requiring clean, stable 5 V or 3.3 V rails amid engine noise and load dumps. IC Role / Device Role: Primary buck regulator stepping down 12 V battery to 5 V/3.3 V with ultra-low EMI to avoid audio interference and display artifacts. Use Value: CISPR 25 Class 5 compliance eliminates shielded inductors and metal cans; 10 A rating supports future-proof multi-core processor upgrades. |
Use Scenario: Supplies microcontroller, CAN transceivers, and TFT LCD backlight in digital instrument clusters where space and thermal density are constrained. IC Role / Device Role: High-density buck converter delivering 5 V @ 6 A with integrated soft-start and RESET for safe boot sequencing. Use Value: 4.5 mm × 3.5 mm wettable-flank QFN enables compact two-layer PCB design; dual-side cooling maintains <125°C junction temp at full load. |
| ADAS Radar Module Power | Domain Controller Core Rail |
|
Use Scenario: Provides low-noise 1.8 V or 1.2 V core supply for 77 GHz radar MMICs and DSPs, where switching noise directly impacts signal-to-noise ratio. IC Role / Device Role: Adjustable-output buck converter with precise 1 V FB reference and <±1.5% output accuracy across temperature and load. Use Value: Pin-selectable 2.2 MHz operation places switching harmonics outside critical RF bands; spread spectrum further suppresses narrowband peaks. |
Use Scenario: Generates 1.1 V or 1.8 V core voltage for automotive domain controllers (e.g., zonal gateways), requiring high efficiency at partial load and robust fault handling. IC Role / Device Role: High-efficiency, functional-safety-capable buck regulator with RESET output and thermal derating support for ASIL-B system integration. Use Value: Built-in RESET with programmable delay replaces external supervisor IC; functional safety documentation aids ISO 26262 FMEDA analysis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480QRPHRQ1 | 8 A rated, identical pinout and feature set; lower current limit (11.5–15.6 A HS OCP) and higher RDS-ON (24 mΩ HS). | Suitable for lower-power infotainment or body-control modules where 10 A headroom is unnecessary. | Select when cost-sensitive designs tolerate reduced current margin and accept slightly lower efficiency at full load. |
| LM62460QRPHRQ1 | 6 A rated, same package and control architecture; lower thermal limits (θJA = 24.5°C/W on EVM) and reduced spread spectrum depth. | Targeted at entry-level ADAS cameras or HVAC controllers with modest power budgets and relaxed EMI requirements. | Choose for space-constrained applications needing proven LM6x4xx architecture but not requiring 10 A capability or Class 5 EMI performance. |
Compared with LM61480QRPHRQ1 and LM62460QRPHRQ1, the LM61495QRPHRQ1 delivers 25% higher output current and superior EMI suppression - making it the optimal choice for next-generation automotive compute platforms demanding both power density and electromagnetic robustness.
Availability
LM61495QRPHRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS sensor modules, and digital instrument cluster designs requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant traceability.
Supply support for LM61495QRPHRQ1 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 deep expertise in automotive-grade power management ICs.
The LM6x4xx-Q1 product line was designed specifically for high-reliability automotive power conversion - emphasizing low EMI, functional safety readiness, wide input range, and thermal resilience in cramped under-dash environments.
FAQ
What is the maximum continuous output current supported by the LM61495QRPHRQ1?
The LM61495QRPHRQ1 supports up to 10 A continuous output current under recommended operating conditions (TA ≤ 125°C, proper PCB layout, and adequate airflow). Its short-circuit high-side current limit is specified from 14 A to 20 A, and thermal shutdown activates at 158°C to protect against sustained overload. Derating is required above 85°C ambient per the thermal characteristics table in the datasheet.
Does the LM61495QRPHRQ1 support adjustable output voltage, and what is the minimum output voltage it can regulate?
Yes, the LM61495QRPHRQ1 supports adjustable output voltage via the FB pin using an external resistor divider. The minimum regulated output voltage is 1 V, corresponding to its internal 1 V feedback reference. The maximum output is 95% of the input voltage, enabling configurations such as 12 V out from 12.6 V input in boost-derived architectures.
How does the RESET output of the LM61495QRPHRQ1 behave during startup and fault conditions?
The LM61495QRPHRQ1 RESET output is an open-drain signal that remains low until the output reaches 94–96.5% of the target voltage and remains valid for ≥1.2 ms. It asserts low again if FB falls below 92–94% (UV) or rises above 110–114% (OV). During EN = low or thermal shutdown, RESET is actively pulled low with <0.4 V VOL at 1 mA pull-up.
Can the LM61495QRPHRQ1 be synchronized to an external clock, and what are the timing requirements?
Yes, the LM61495QRPHRQ1 supports external synchronization via the SYNC/MODE pin. A clean CMOS-level clock with ≥100 ns pulse width (high or low) and frequency between 200 kHz and 2.2 MHz can be applied. Internal locking occurs within 4.3 ms when RT is set to 39.2 kΩ; the device maintains synchronization even if the external clock is intermittently disabled.
What package type and thermal metrics apply to the LM61495QRPHRQ1, and how is thermal performance validated?
The LM61495QRPHRQ1 uses a 16-pin VQFN-HR (RPH) package measuring 4.5 mm × 3.5 mm with wettable flanks. Its thermal performance is characterized with θJA = 21.6°C/W on the LM61495RPHEVM evaluation module and θJB = 12.2°C/W to the PCB. Dual-side cooling is enabled by pin-to-pin compatibility with LM61480T-Q1/LM61495T-Q1, allowing thermal pads on both top and bottom layers.
LM61495QRPHRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-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):
- 3V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 34.2V
- Current - Output:
- 10A
- Frequency - Switching:
- 200kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 16-VQFN-HR (4.5x3.5)
LM61495QRPHRQ1 FAQ
1.How can I place an order for LM61495QRPHRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM61495QRPHRQ1 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 LM61495QRPHRQ1 reliable?
The price and inventory of LM61495QRPHRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM61495QRPHRQ1 is usually 5 days.
3.What payment methods are accepted for LM61495QRPHRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM61495QRPHRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM61495QRPHRQ1?
LM61495QRPHRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM61495QRPHRQ1 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 LM61495QRPHRQ1?
For technical support, including LM61495QRPHRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM61495QRPHRQ1 requirements.
6.How does Aetrix verify that LM61495QRPHRQ1 is sourced from the original manufacturer or authorized distributors?
All LM61495QRPHRQ1 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 LM61495QRPHRQ1 meets industry standards.
7.What is the process for return or replacement of LM61495QRPHRQ1?
All LM61495QRPHRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM61495QRPHRQ1, 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 LM61495QRPHRQ1 part is unused and in its original packaging.
Return procedure for LM61495QRPHRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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