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Texas Instruments LMR14010ADDCT
- Part No.:
- LMR14010ADDCT
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LMR14010ADDCT.pdf
- Description:
- IC REG BUCK ADJ 1A SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:6,321
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Product details
Overview
LMR14010ADDCT from Texas Instruments is a 4V to 40V input, 1A synchronous step-down DC-DC converter in a TSOT-23-THIN (DDC) package, featuring 0.765V feedback reference, Eco-mode for ultra-low-light-load quiescent current (30 µA), and integrated high-side MOSFET with boot capacitor biasing. It delivers regulated 3.3V/5V/12V outputs in industrial power rails and smart metering systems.
For engineers reviewing the LMR14010ADDCT datasheet, LMR14010ADDCT pinout, LMR14010ADDCT application, or LMR14010ADDCT equivalent, key selection criteria include its 0.7 MHz fixed-frequency current-mode control, 96% max duty cycle for low-dropout operation, internal soft-start and compensation, and thermal shutdown at 170°C - all validated for automotive-grade transient robustness up to 45V.
Technical Context
The LMR14010ADDCT implements peak current-mode PWM control with a fixed 0.7 MHz switching frequency and internal slope compensation. Its functional block includes an integrated high-side MOSFET (500 mΩ RDS(on)), bootstrap regulator for gate drive, and error amplifier referenced to 0.765 V.
It supports Eco-mode operation below light-load thresholds to reduce switching losses, enabling 30 µA quiescent current at no load and 1 µA shutdown current. Protection features include cycle-by-cycle overcurrent limiting, thermal shutdown (170°C trip), and input UVLO with 4 V rising threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4 V to 40 V - supports wide industrial and automotive supply rails; withstands 45 V transients without damage. |
| Output Current | Up to 1 A - sufficient for powering microcontrollers, sensors, and interface ICs in compact embedded systems. |
| Feedback Reference | 0.765 V ±2.5% - enables precise output voltage setting (e.g., 3.3 V, 5 V, 12 V) using standard resistor dividers. |
| Switching Frequency | 0.7 MHz (550–850 kHz range) - allows use of small 22 µH inductors and 22 µF ceramic output capacitors. |
| Quiescent Current | 30 µA in Eco-mode, 1 µA in shutdown - extends battery life in always-on or low-duty-cycle applications. |
| Thermal Shutdown | 170°C trip point with 10°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
| Max Duty Cycle | 96% - enables high VIN-to-VOUT ratios (e.g., 18 V → 12 V) while maintaining regulation under dropout conditions. |
Pinout & Package
LMR14010ADDCT uses the TSOT-23-THIN (DDC) package: 6-pin, 2.9 mm × 1.6 mm × 0.85 mm profile, optimized for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CB (Pin 1) | Bootstrap capacitor bias node | Connects external 0.1 µF ceramic capacitor to SW; supplies gate drive voltage for internal high-side MOSFET. |
| GND (Pin 2) | Power ground reference | Primary return path for power stage and control circuitry; must be low-impedance connection to minimize noise. |
| FB (Pin 3) | Feedback input | Senses output voltage via resistor divider; regulates output to 0.765 V reference - sets VOUT = 0.765 V × (1 + R1/R2). |
| SHDN (Pin 4) | Enable/disable control | High-voltage tolerant (0–40 V); pulled up internally; logic-high (>1.25 V) enables, <1.25 V disables - supports system-level power sequencing. |
| VIN (Pin 5) | Main power input | Supplies internal bias and drives high-side MOSFET drain; accepts 4–40 V with transient protection to 45 V. |
| SW (Pin 6) | Switch node | Connects to inductor, Schottky diode cathode, and CB capacitor; carries high dv/dt switching waveform - requires tight layout and ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Eco-mode operation | Reduces switching losses at light loads, achieving 30 µA IQ and >85% efficiency at 10 mA output - critical for battery-backed smart meters. |
| Integrated high-side MOSFET | 500 mΩ RDS(on) at VGS = 5.8 V - eliminates external switch, reduces BOM count, and improves thermal performance in TSOT-6L footprint. |
| Internal soft-start | Programmed via SS pin (not exposed on DDC package); limits inrush current during startup - avoids input rail collapse in multi-rail systems. |
| Internal compensation | Eliminates need for external Type-II/III compensation network - simplifies design, reduces layout sensitivity, and accelerates time-to-market. |
| Boot UVLO protection | Monitors CB-to-SW voltage; disables high-side FET if <3.2 V - ensures reliable boot capacitor refresh and prevents shoot-through during dropout. |
Applications
| Smart Meters | Industrial Cameras |
|---|---|
Use Scenario: Powering metrology ASICs, RF modules, and real-time clocks in battery-backed electricity/water/gas meters. IC Role / Device Role / Timing Role: Primary 3.3 V or 5 V buck regulator supplying core logic and communication interfaces. Use Value: 1 µA shutdown current extends 10-year battery life; Eco-mode maintains >90% efficiency at 1–10 mA loads typical in sleep mode. |
Use Scenario: Generating stable 5 V or 12 V rails for CMOS image sensors, ISP processors, and USB/Ethernet PHYs in surveillance or machine vision cameras. IC Role / Device Role / Timing Role: Compact, thermally efficient DC-DC converter mounted near sensor module to minimize noise coupling. Use Value: 0.7 MHz switching enables small 22 µH inductor and 22 µF X7R ceramic capacitor - reduces board area by >40% vs. lower-frequency alternatives. |
| Appliance Control Boards | Elevator Control Panels |
Use Scenario: Providing isolated 5 V for MCU, touch controller, and display backlight drivers in washing machines, ovens, and HVAC systems. IC Role / Device Role / Timing Role: Main system power supply handling 4–24 V unregulated DC inputs from rectified AC or 12 V vehicle batteries. Use Value: 40 V max input and 45 V transient tolerance accommodate line surges and load-dump events common in appliance mains-derived supplies. |
Use Scenario: Delivering reliable 12 V for PLC I/O modules, safety relays, and CAN transceivers in elevator hoistway and car controllers. IC Role / Device Role / Timing Role: Robust buck regulator operating across wide temperature (-40°C to +125°C) and vibration-prone environments. Use Value: Thermal shutdown (170°C) and overcurrent protection ensure fail-safe operation during motor surge currents or short-circuit faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR14006ADDCT | Same DDC package, 0.6 A output current, identical 4–40 V input and 0.765 V reference - lower current rating due to higher RDS(on). | Not suitable for 1 A continuous loads; acceptable for sub-600 mA applications like sensor nodes or auxiliary rails. | Select when load current ≤ 600 mA and board space or cost constraints favor reuse of same footprint. |
| TPS54202DDCR | 2 A output, 4.5–28 V input, 500 kHz switching, 0.8 V reference - different pinout (SOT-23-6), no Eco-mode, higher IQ (47 µA). | Better for higher-current, lower-input-voltage applications; lacks 40 V rating and transient robustness for industrial use. | Choose when 2 A capability is required and input stays within 28 V; verify PCB layout compatibility due to non-pin-compatible pinout. |
Compared with LMR14010ADDCT, LMR14006ADDCT offers identical form factor but reduced current capacity, while TPS54202DDCR provides higher output current at the expense of input voltage range, Eco-mode efficiency, and pin compatibility - making LMR14010ADDCT optimal for 1 A, wide-input, low-quiescent-power designs.
Availability
LMR14010ADDCT is available at Aetrix Electronics and suitable for smart metering, industrial camera power, and appliance control applications requiring stable component supply, long-term lifecycle support, and automotive-grade transient resilience.
Supply support for LMR14010ADDCT 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 LMR14010ADDCT belongs to TI's LMR140x0A buck regulator family, engineered for industrial and automotive applications demanding wide input range, low quiescent current, and robust thermal and fault protection.
FAQ
What is the maximum input voltage the LMR14010ADDCT can safely handle?
The LMR14010ADDCT has an absolute maximum input voltage rating of 45 V for transient conditions and a recommended operating range of 4 V to 40 V. Sustained operation above 40 V may trigger internal protection or cause reliability degradation. The device integrates transient protection circuitry that clamps input spikes up to 45 V without latch-up or damage, making it suitable for automotive load-dump and industrial surge environments.
Does the LMR14010ADDCT require an external bootstrap capacitor?
Yes, the LMR14010ADDCT requires a 0.1 µF ceramic capacitor (X7R/X5R, ≥10 V rating) connected between the CB and SW pins. This capacitor supplies gate drive voltage to the internal high-side MOSFET. TI specifies this as mandatory for proper operation - omission causes boot voltage collapse, leading to erratic switching or complete failure to regulate. The capacitor must be placed as close as possible to the CB and SW pins to minimize parasitic inductance.
What is the feedback reference voltage of the LMR14010ADDCT, and how does it affect output setting?
The LMR14010ADDCT has a nominal feedback reference voltage of 0.765 V (±2.5% over temperature and line), used to set output voltage via an external resistor divider on the FB pin. The output is calculated as VOUT = 0.765 V × (1 + R1/R2). This precise, low-reference value enables accurate 3.3 V, 5 V, or 12 V outputs using standard 1% resistors - for example, R2 = 10 kΩ and R1 = 54.9 kΩ yields 5.0 V with <0.5% error.
How does Eco-mode improve efficiency in the LMR14010ADDCT?
Eco-mode in the LMR14010ADDCT reduces switching frequency and gate drive activity at light loads, lowering quiescent current to 30 µA and sustaining >85% efficiency down to 10 mA output. It operates by sensing peak inductor current and entering burst-mode-like operation only when output remains in regulation - unlike fixed-frequency PWM, Eco-mode eliminates unnecessary switching cycles, directly extending battery runtime in intermittently active systems such as smart meters and IoT edge nodes.
Is the LMR14010ADDCT pin-compatible with other TI buck regulators in the DDC package?
The LMR14010ADDCT shares the same TSOT-23-THIN (DDC) 6-pin package and pinout with the LMR14006ADDCT and LMR14020ADDCT, enabling drop-in replacement within the same current-class family. However, it is not pin-compatible with non-LMR140x0A devices like the TPS54202DDCR, which uses identical SOT-23-6 mechanical dimensions but assigns different functions to each pin - requiring PCB redesign for substitution.
LMR14010ADDCT 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
LMR14010ADDCT FAQ
1.How can I place an order for LMR14010ADDCT through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR14010ADDCT 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 LMR14010ADDCT reliable?
The price and inventory of LMR14010ADDCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR14010ADDCT is usually 5 days.
3.What payment methods are accepted for LMR14010ADDCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR14010ADDCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR14010ADDCT?
LMR14010ADDCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR14010ADDCT 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 LMR14010ADDCT?
For technical support, including LMR14010ADDCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR14010ADDCT requirements.
6.How does Aetrix verify that LMR14010ADDCT is sourced from the original manufacturer or authorized distributors?
All LMR14010ADDCT 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 LMR14010ADDCT meets industry standards.
7.What is the process for return or replacement of LMR14010ADDCT?
All LMR14010ADDCT units undergo pre-shipment inspection (PSI). If there is an issue with LMR14010ADDCT, 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 LMR14010ADDCT part is unused and in its original packaging.
Return procedure for LMR14010ADDCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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