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Texas Instruments LMR14010ADDCR
- Part No.:
- LMR14010ADDCR
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LMR14010ADDCR.pdf
- Description:
- IC REG BUCK ADJ 1A SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:8,776
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Product details
Overview
LMR14010ADDCR from Texas Instruments is a 4V to 40V input, 1A synchronous step-down DC/DC converter in TSOT-23-THIN (DDC) package, featuring 0.765V feedback reference, Eco-mode for ultra-low 30µA light-load quiescent current, and integrated high-side MOSFET with boot capacitor biasing. It delivers stable 5V/12V outputs for industrial power rails in smart meters and cameras.
For engineers reviewing the LMR14010ADDCR datasheet, LMR14010ADDCR pinout, LMR14010ADDCR application, or LMR14010ADDCR equivalent, key selection criteria include its 0.7MHz fixed-frequency current-mode control, 96% max duty cycle capability, 1µA shutdown current, thermal shutdown at 170°C, and compatibility with ceramic output capacitors in space-constrained designs.
Technical Context
The LMR14010ADDCR implements peak current-mode PWM control with internal slope compensation and leading-edge blanking, enabling fast transient response and simplified loop compensation. Its constant 0.7MHz switching frequency reduces external component count while minimizing output ripple voltage.
It integrates a bootstrap regulator with CB/SW pin interface for high-side gate drive, supports up to 96% duty cycle via boot UVLO management, and features precision enable (SHDN) with 1.25V threshold and internal pull-up-enabling undervoltage lockout adjustment using external resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 40V - supports wide industrial and automotive supply rails; withstands 45V transients. |
| Output Current | Up to 1A - sufficient for powering microcontrollers, sensors, and interface ICs in embedded systems. |
| Feedback Reference | 0.765V ±2.5% - enables precise output voltage setting (e.g., 5V with R1=54.9kΩ/R2=10kΩ). |
| Switching Frequency | 0.7MHz (550–850kHz range) - allows compact 22µH inductors and 22µF ceramic output capacitors. |
| Quiescent Current | 30µA in Eco-mode - extends battery life in always-on applications like smart meter backup supplies. |
| Shutdown Current | 1µA - ensures minimal leakage during system sleep or standby modes. |
| Thermal Shutdown | 170°C trip point with 10°C hysteresis - protects against sustained overload or poor PCB thermal design. |
Pinout & Package
LMR14010ADDCR uses the TSOT-23-THIN (DDC) package: 6-pin, 2.9mm × 1.6mm × 0.85mm low-profile surface-mount outline with exposed pad for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CB (Pin 1) | Bootstrap bias supply | Connects to SW via 0.1µF ceramic capacitor; provides gate drive voltage for internal high-side MOSFET. |
| GND (Pin 2) | Power ground | Main return path for input, output, and internal circuitry; must be connected to low-impedance PCB ground plane. |
| FB (Pin 3) | Feedback input | Senses output voltage divider; regulates VOUT = 0.765V × (1 + R1/R2); requires stable RC filter if remote sensing used. |
| SHDN (Pin 4) | Enable/disable control | High-voltage tolerant (≤40V); pulled high internally; <1.25V disables regulator and drops IQ to 1µA. |
| VIN (Pin 5) | Main power input | Supplies internal bias and drives high-side MOSFET drain; requires local 2.2µF X5R/X7R ceramic decoupling. |
| SW (Pin 6) | Switch node | Connects to inductor, Schottky diode cathode, and CB capacitor; carries high dv/dt; requires tight layout to minimize EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Eco-mode operation | Reduces switching losses at light loads, achieving 30µA IQ and >85% efficiency at 10mA output. |
| Integrated boot diode & refresh FET | Eliminates external bootstrap diode; enables reliable high-duty-cycle operation without external charge pump. |
| Internal soft-start | Prevents inrush current during startup by gradually ramping COMP voltage; eliminates need for external SS capacitor. |
| Pulse-by-pulse overcurrent protection | Clamps COMP voltage to limit peak switch current to ~1.5A; prevents inductor saturation during short-circuit events. |
| Thermal shutdown with hysteresis | Halts switching at 170°C junction temperature and resumes only after cooling to ~160°C - avoids thermal cycling instability. |
Applications
| Smart Meters | Industrial Cameras |
|---|---|
Use Scenario: Powering metrology ASICs, RF modules, and real-time clocks in battery-backed utility meters operating across 9–36V DC rails. IC Role / Device Role / Timing Role: Primary buck regulator delivering regulated 3.3V/5V from wide-input unregulated supply; manages load transients during wireless transmission bursts. Use Value: 1µA shutdown current preserves lithium-thionyl chloride battery life for >10 years; Eco-mode maintains >90% efficiency at 10mA sensor bias current. |
Use Scenario: Providing clean 5V rail for CMOS image sensors and ISP processors in IP surveillance cameras powered from 12V PoE or 24V industrial bus. IC Role / Device Role / Timing Role: Point-of-load converter with fast load-step response (<50µs recovery) to handle sensor frame-rate switching and LED flash pulses. Use Value: 0.7MHz fixed frequency avoids AM radio band interference; integrated compensation reduces BOM count by two external components vs. controller-based solutions. |
| Appliances Control Boards | Elevators & Escalators |
Use Scenario: Generating 5V/12V for MCU, display drivers, and communication interfaces in washing machines, ovens, and HVAC controllers exposed to 12–36V battery or rectified AC supplies. IC Role / Device Role / Timing Role: Main system power IC with robust input transient tolerance (45V) and thermal fault resilience in enclosed, high-ambient-temperature enclosures. Use Value: 102°C/W θJA enables full 1A output without heatsink in 4-layer PCBs; SHDN pin allows coordinated power sequencing with main system controller. |
Use Scenario: Supplying logic rails for safety-rated PLC I/O modules and position encoder interfaces in elevator control cabinets fed from 24–48V DC distribution buses. IC Role / Device Role / Timing Role: Isolated auxiliary supply stage converting noisy bus voltage to stable low-noise 5V for microcontroller and CAN transceiver operation. Use Value: Low dropout capability (96% duty cycle) sustains regulation during brownout conditions; internal soft-start prevents nuisance tripping of upstream fuses during cold start. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR14020ADDCR | 2A output current rating; identical 4–40V input, 0.765V FB, and DDC package footprint. | Supports higher-power peripherals (e.g., motor drivers, multi-sensor nodes) without layout change. | Select when future-proofing for >1A peak loads or parallel operation is anticipated. |
| TPS54202DDCR | 2A output, 4.5–28V input, 580kHz–2MHz adjustable frequency, but requires external bootstrap diode and compensation. | Better suited for noise-sensitive applications requiring frequency dithering or EMI reduction via spread spectrum. | Choose when design flexibility (frequency tuning, external loop control) outweighs BOM simplicity. |
Compared with LMR14010ADDCR, LMR14020ADDCR offers headroom for current growth in same footprint, while TPS54202DDCR trades integration for configurability-neither is pin-compatible, but both share SOT-23-THIN mounting and similar thermal profiles.
Availability
LMR14010ADDCR is available at Aetrix Electronics and suitable for smart metering, industrial camera power, and appliance control board designs requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for LMR14010ADDCR 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 technologies, with decades of expertise in high-reliability DC/DC conversion.
The LMR140x family targets cost-sensitive, space-constrained industrial and automotive applications needing wide-input, high-efficiency buck regulation without external compensation or bootstrap diodes.
FAQ
What is the maximum duty cycle supported by the LMR14010ADDCR?
The LMR14010ADDCR supports up to 96% maximum duty cycle, enabled by its boot UVLO circuit and internal refresh FET. This allows operation with very small VIN–VOUT differentials-critical for maintaining regulation during input brownouts in 12V or 24V industrial systems. The device monitors CB-to-SW voltage and disables the high-side MOSFET if it falls below 3.2V to allow capacitor recharge.
Does the LMR14010ADDCR require an external bootstrap diode?
No, the LMR14010ADDCR does not require an external bootstrap diode. It integrates a boot regulator with internal refresh FET and clamping circuitry, eliminating the need for discrete diodes typically required in external bootstrap configurations. This reduces BOM count, improves reliability, and simplifies layout-especially beneficial in compact TSOT-23-THIN implementations.
How does Eco-mode improve light-load efficiency in the LMR14010ADDCR?
Eco-mode in the LMR14010ADDCR reduces switching and gate-drive losses at light loads by entering burst-mode operation when output current drops below a threshold determined by VIN, VOUT, and inductor value. This lowers quiescent current to 30µA and maintains >85% efficiency at 10mA load-extending battery life in always-on applications such as smart meter backup supplies.
What thermal metrics apply to the LMR14010ADDCR in its DDC package?
The LMR14010ADDCR in the TSOT-23-THIN (DDC) package has a junction-to-ambient thermal resistance (RθJA) of 102°C/W under JEDEC-standard 3"×3" 4-layer PCB conditions. Its junction-to-case (top) resistance is 36.9°C/W, and ψJB (junction-to-board) is 28.4°C/W-guiding thermal pad design, via placement, and copper area allocation for 1A continuous operation without derating.
Can the LMR14010ADDCR be used with ceramic output capacitors only?
Yes, the LMR14010ADDCR is fully compatible with ceramic-only output capacitor designs. Its internal compensation and current-mode architecture stabilize operation with low-ESR ceramics (e.g., 22µF X5R/X7R), eliminating the need for tantalum or aluminum electrolytics. Typical designs use 22µF output capacitance with ≤680mΩ effective series resistance to meet 1% ripple and transient response specs.
LMR14010ADDCR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- 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):
- 0.765V
- Voltage - Output (Max):
- 40V
- Current - Output:
- 1A
- Frequency - Switching:
- 550kHz ~ 850kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-THIN
LMR14010ADDCR FAQ
1.How can I place an order for LMR14010ADDCR through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR14010ADDCR 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 LMR14010ADDCR reliable?
The price and inventory of LMR14010ADDCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR14010ADDCR is usually 5 days.
3.What payment methods are accepted for LMR14010ADDCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR14010ADDCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR14010ADDCR?
LMR14010ADDCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR14010ADDCR 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 LMR14010ADDCR?
For technical support, including LMR14010ADDCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR14010ADDCR requirements.
6.How does Aetrix verify that LMR14010ADDCR is sourced from the original manufacturer or authorized distributors?
All LMR14010ADDCR 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 LMR14010ADDCR meets industry standards.
7.What is the process for return or replacement of LMR14010ADDCR?
All LMR14010ADDCR units undergo pre-shipment inspection (PSI). If there is an issue with LMR14010ADDCR, 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 LMR14010ADDCR part is unused and in its original packaging.
Return procedure for LMR14010ADDCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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