My Inquiry
My Account
Texas Instruments LMR14020SQDPRTQ1
- Part No.:
- LMR14020SQDPRTQ1
- Manufacturer:
- Texas Instruments
- Package:
- 10-WDFN Exposed Pad
- Datasheet:
-
LMR14020SQDPRTQ1.pdf
- Description:
- IC REG BUCK ADJ 2A 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,212
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LMR14020SQDPRTQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified 40V input, 2A synchronous step-down DC/DC converter with integrated 90mΩ high-side MOSFET, 40µA quiescent current in sleep mode, adjustable 200kHz–2.5MHz switching frequency, and internal compensation. It delivers stable 0.8V–28V output for battery regulation in start-stop systems.
For engineers reviewing the LMR14020SQDPRTQ1 datasheet, LMR14020SQDPRTQ1 pinout, LMR14020SQDPRTQ1 application, or LMR14020SQDPRTQ1 equivalent, key selection criteria include ultra-low IQ for always-on automotive modules, spread-spectrum EMI reduction, precision enable for power sequencing, thermal shutdown at 170°C, and compatibility with 4V–40V unregulated battery rails.
Technical Context
The LMR14020SQDPRTQ1 implements fixed-frequency peak current mode control with slope compensation to prevent sub-harmonic oscillation above 50% duty cycle. Its internal error amplifier drives a PWM comparator referenced to a 0.75V (±1.5%) feedback voltage, enabling precise output regulation across temperature.
Sleep mode activates below 300mA peak inductor current, clamping COMP voltage at 400mV and reducing IQ to 40µA while maintaining regulation via periodic burst-mode switching. The BOOT capacitor recharge circuit supports up to 97% effective duty cycle during dropout, with automatic low-side switch activation when BOOT–SW falls below 3.2V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 40V - supports direct connection to automotive battery (cold-crank down to 4V, load-dump up to 40V) |
| Output Current | 2A continuous - sufficient for powering ADAS sensors, infotainment SoCs, or body control modules |
| Quiescent Current | 40µA in sleep mode - enables >1-year battery hold-up for parked vehicle applications |
| Switching Frequency | 200kHz–2.5MHz adjustable via RT resistor - allows trade-off between efficiency (low fSW) and size (high fSW) |
| Feedback Reference | 0.750V ±1.5% - sets output accuracy to ±1% with 1% resistors, enabling 3.3V/5V/12V outputs |
| High-Side RDS(on) | 90mΩ typical - reduces conduction loss at 2A, improving full-load efficiency by ~2% vs. 150mΩ alternatives |
| Min. On-Time | 75ns - supports high VIN/VOUT ratios (e.g., 36V→3.3V at 2.2MHz) without pulse-skipping instability |
| Thermal Shutdown | 170°C with 12°C hysteresis - protects against sustained overload in enclosed junction-box environments |
Pinout & Package
LMR14020SQDPRTQ1 is packaged in a 10-pin WSON (DPR) package (4mm × 4mm, 0.5mm pitch) with exposed thermal pad for low RθJC(bot) of 3.1°C/W, enabling 2A operation without external heatsink at TA ≤ 85°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power Input | Bypassed directly to GND with high-frequency ceramic capacitor; path must be shortest possible to minimize EMI and voltage spikes |
| BOOT | Bootstrap Supply | Connects 0.1µF X7R capacitor to SW; supplies gate drive for high-side MOSFET during ON-time |
| SW | Switch Node | Drives external power inductor; requires tight layout to minimize ringing and EMI radiation |
| EN | Enable Control | Precision analog input with 1.2V threshold and 3.6µA hysteresis current - enables system-level UVLO design with resistor dividers |
| RT/SYNC | Frequency Control | Configurable as resistor-set oscillator (200kHz–2.5MHz) or high-impedance clock input (250kHz–2.3MHz) for EMI synchronization |
| FB | Feedback Input | Compares output voltage divider to 0.75V reference; connects directly to VOUT for fixed 5V option |
| SS | Soft-Start | Accepts external capacitor (up to 4.7nF) to program controlled VOUT ramp time and limit inrush current |
| PGOOD | Power-Good Flag | Open-drain output asserting when VOUT is within ±3% of target - requires external 10kΩ–100kΩ pull-up |
| GND | System Ground | Low-impedance return path; connects to PCB ground plane under thermal pad for thermal dissipation |
| Thermal Pad | Heat Sink | Must be soldered to solid copper ground plane; primary thermal path accounting for >85% of heat removal |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - meets automotive cabin and engine-bay thermal requirements |
| Spread-spectrum modulation | Reduces peak EMI amplitude by ±6% frequency dithering - simplifies compliance with CISPR 25 Class 5 limits |
| Internal loop compensation | Eliminates need for external Type-II/III compensation network - cuts BOM count by 3–5 passive components |
| 1µA shutdown current | Extends vehicle battery life during extended parking - critical for telematics and alarm systems |
| Cycle-by-cycle current limit | Protects against short-circuit faults without latch-off - maintains system availability during transient overloads |
| Adjustable UVLO hysteresis | Enables custom brown-in/brown-out thresholds using EN pin dividers - supports robust power sequencing in multi-rail ECUs |
Applications
| Automotive Battery Regulation | ADAS Power Management |
|---|---|
Use Scenario: Regulating 12V battery rail to 3.3V/5V for camera modules, radar processors, and CAN transceivers in Level 2+ ADAS systems. IC Role / Device Role / Timing Role: Primary buck converter supplying clean, low-noise power with fast transient response to handle processor load steps. Use Value: 40µA IQ extends battery runtime during vehicle sleep mode; spread spectrum reduces EMI coupling into sensitive RF receivers. | Use Scenario: Powering vision-based driver monitoring systems (DMS) requiring always-on 3.3V supply with wake-on-event capability. IC Role / Device Role / Timing Role: Always-on regulator maintaining microcontroller RTC and sensor interface in low-power state until IR illumination triggers wake-up. Use Value: 1µA shutdown current prevents parasitic drain; precision enable allows MCU-controlled power gating without external logic. |
| Body Control Module (BCM) | Infotainment System Power |
Use Scenario: Generating 5V for door module microcontrollers, window lift motors, and LED lighting drivers in centralized BCM architectures. IC Role / Device Role / Timing Role: High-reliability power stage handling wide input transients (load dump, cold crank) while delivering 2A peak loads. Use Value: 40V absolute max rating and thermal shutdown protect against automotive electrical faults; 97% duty cycle supports 5V output from 5.5V minimum input. | Use Scenario: Supplying 12V intermediate bus for display backlight drivers and audio amplifiers in head-unit designs. IC Role / Device Role / Timing Role: Efficient pre-regulator stepping down 12V battery to stable 12V bus, reducing heat in downstream LDOs. Use Value: 90mΩ RDS(on) minimizes conduction loss at 2A; adjustable fSW allows optimization for low-audio-noise operation at 400kHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR14030SQDDARQ1 | 3.5A output, HSOIC-8 package, same 4V–40V input and 40µA IQ | Higher current for multi-rail systems; larger DDA package increases board area but improves thermal margin | Select when >2A load margin required; pin-compatible upgrade path with identical control features |
| TPS54240QDGQRQ1 | 3.5A, 40V input, 65µA IQ, external compensation, no spread spectrum | Lacks integrated soft-start and PGOOD; requires external loop compensation components | Choose for cost-sensitive designs where EMI filtering is handled externally and layout space permits extra passives |
Compared with LMR14020SQDPRTQ1, the LMR14030SQDDARQ1 offers higher current in a larger package with identical feature set, while the TPS54240QDGQRQ1 trades integration for flexibility and lower cost but increases design complexity and component count.
Availability
LMR14020SQDPRTQ1 is available at Aetrix Electronics and suitable for automotive battery regulation, ADAS power management, and body control module applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMR14020SQDPRTQ1 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 deep expertise in automotive-grade reliability and functional safety.
The LMR14020SQDPRTQ1 belongs to TI's SIMPLE SWITCHER® automotive power converter family, designed specifically for robust, low-EMI DC/DC conversion in harsh automotive environments where wide input range, ultra-low quiescent current, and AEC-Q100 compliance are mandatory.
FAQ
What is the maximum output voltage supported by the LMR14020SQDPRTQ1?
The LMR14020SQDPRTQ1 supports an adjustable output voltage range of 0.8V to 28V, set by an external resistor divider on the FB pin. Its internal 0.75V reference enables precise regulation; for example, a 5V output is achieved with RFBB = 10kΩ and RFBT = 56.2kΩ. Fixed 5V variants exist (e.g., LMR14020SSQ5DDARQ1), but the LMR14020SQDPRTQ1 itself is adjustable.
Does the LMR14020SQDPRTQ1 support synchronization to an external clock?
Yes, the LMR14020SQDPRTQ1 supports frequency synchronization via its RT/SYNC pin, accepting external clock signals from 250kHz to 2.3MHz. When the pin voltage exceeds the PLL upper threshold (1.7V), the internal oscillator disables and the pin becomes a high-impedance clock input synchronized on falling edges. This feature reduces EMI peaks in noise-sensitive automotive systems.
How does the LMR14020SQDPRTQ1 achieve ultra-low quiescent current?
The LMR14020SQDPRTQ1 achieves 40µA quiescent current in sleep mode by disabling switching when load current drops below ~300mA peak, clamping the internal COMP voltage at 400mV, and powering only essential bias circuits. In shutdown mode (EN < 1.2V), it draws just 1µA by disconnecting all internal regulators - a critical feature for automotive always-on modules like telematics and alarm systems.
What package type and thermal performance does the LMR14020SQDPRTQ1 use?
The LMR14020SQDPRTQ1 uses a 10-pin WSON (DPR) package (4mm × 4mm) with an exposed thermal pad. Its junction-to-board thermal resistance (RθJB) is 13.6°C/W, and junction-to-case (bottom) resistance is 3.1°C/W. With proper PCB copper area under the thermal pad, it sustains 2A continuous output at 85°C ambient without forced airflow.
Can the LMR14020SQDPRTQ1 operate with input voltages below 4V?
No, the LMR14020SQDPRTQ1 has a minimum recommended input voltage of 4V per its Absolute Maximum Ratings and Recommended Operating Conditions. Below 4V, the device may fail to start or regulate properly due to insufficient gate drive voltage for the high-side MOSFET and internal bias circuitry. For sub-4V operation, alternative regulators like the TPS62864-Q1 (2.7V–6V input) should be considered.
LMR14020SQDPRTQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 10-WDFN 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):
- 4V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 28V
- Current - Output:
- 2A
- Frequency - Switching:
- 200kHz ~ 2.5MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-WSON (4x4)
LMR14020SQDPRTQ1 FAQ
1.How can I place an order for LMR14020SQDPRTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR14020SQDPRTQ1 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 LMR14020SQDPRTQ1 reliable?
The price and inventory of LMR14020SQDPRTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR14020SQDPRTQ1 is usually 5 days.
3.What payment methods are accepted for LMR14020SQDPRTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR14020SQDPRTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR14020SQDPRTQ1?
LMR14020SQDPRTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR14020SQDPRTQ1 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 LMR14020SQDPRTQ1?
For technical support, including LMR14020SQDPRTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR14020SQDPRTQ1 requirements.
6.How does Aetrix verify that LMR14020SQDPRTQ1 is sourced from the original manufacturer or authorized distributors?
All LMR14020SQDPRTQ1 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 LMR14020SQDPRTQ1 meets industry standards.
7.What is the process for return or replacement of LMR14020SQDPRTQ1?
All LMR14020SQDPRTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR14020SQDPRTQ1, 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 LMR14020SQDPRTQ1 part is unused and in its original packaging.
Return procedure for LMR14020SQDPRTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMR14020SQDPRTQ1 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
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
