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Texas Instruments LMR36510ADDAR
- Part No.:
- LMR36510ADDAR
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMR36510ADDAR.pdf
- Description:
- IC REG BUCK ADJ 1A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:25,360
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Product details
Overview
LMR36510ADDAR from Texas Instruments is a synchronous step-down DC/DC converter delivering 1 A output current across a 4.2 V to 65 V input range, featuring peak-current mode control, internal compensation, and integrated high-side/low-side MOSFETs. It supports adjustable output from 1 V to 95% of VIN, operates at 400 kHz, and delivers 90% efficiency at 24 VIN/5 VOUT/1 A - ideal for rugged industrial power supplies in IP cameras and HVAC actuators.
For engineers reviewing the LMR36510ADDAR datasheet, LMR36510ADDAR pinout, LMR36510ADDAR application, or LMR36510ADDAR equivalent, key selection considerations include its 70 V transient tolerance, 26 µA quiescent current in PFM mode, thermal shutdown (170 °C), hiccup short-circuit protection, and compatibility with LMR36520 and LMR33610 for scalable design reuse.
Technical Context
The LMR36510ADDAR uses peak-current mode control with auto-transition between PWM (constant 400 kHz) and PFM (diode-emulation) modes based on load. Its internal loop compensation eliminates external compensation components, while precision enable thresholds (1.157 V rise, 1.231 V fall) support direct VIN connection or programmable UVLO.
It integrates a 5 V internal LDO (VCC pin), open-drain power-good flag with built-in glitch filtering and 4 ms startup delay, and dual current limiting: cycle-by-cycle high-side peak limit (1.6–2.4 A) and valley-based low-side limit (1–1.6 A), plus hiccup mode triggered below 0.4 V FB during hard shorts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.2 V to 65 V - supports wide-VIN industrial rails including 24 V, 36 V, and 48 V systems without pre-regulation. |
| Output Current | 1 A continuous - sufficient for powering microcontrollers, sensors, and analog front-ends in embedded modules. |
| Switching Frequency | 400 kHz ±15% - enables compact magnetics while balancing EMI and efficiency; drops in dropout to maintain regulation. |
| Quiescent Current | 26 µA (PFM mode) - minimizes standby power in always-on applications like security cameras and remote IO. |
| Feedback Reference | 1.000 V ±15 mV - enables precise output voltage setting via resistor divider; defines regulation accuracy under all loads. |
| Thermal Shutdown | 170 °C trip / 158 °C recovery - protects against sustained overload or poor PCB thermal design without latch-off. |
| Transient Tolerance | 70 V input - meets IEC 61000-4-5 surge immunity requirements, reducing need for external TVS clamping. |
Pinout & Package
The LMR36510ADDAR is housed in an 8-pin HSOIC (DDA) package measuring 4.9 mm × 6 mm, with exposed thermal pad for enhanced heat dissipation. The package requires soldering the thermal pad to a dedicated ground plane per TI layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (1) | Power and analog ground reference | Primary return path for high-current switching; must connect to low-impedance ground plane with short, wide traces. |
| VIN (2) | Main input supply input | Accepts 4.2–65 V; requires local ceramic bypass capacitor directly to PGND to suppress high-frequency noise. |
| EN (3) | Enable control input | Logic-level input with precision thresholds (1.157 V rise); connects directly to VIN for always-on operation or to divider for programmable UVLO. |
| PG (4) | Open-drain power-good flag | Signals regulated output status; requires external pull-up; asserts low during startup, fault, or EN deactivation. |
| FB (5) | Feedback voltage sense input | Monitors output via resistor divider; regulates to 1.000 V reference; must not be floated or grounded. |
| VCC (6) | Internal 5 V LDO output | Supplies internal circuitry; can power PG pull-up; requires 1 µF ceramic capacitor to PGND; not for external loads. |
| BOOT (7) | Bootstrap supply for high-side driver | Connects 100 nF capacitor to SW pin; critical for proper high-side MOSFET gate drive and efficiency. |
| SW (8) | Switch node | Connects to power inductor; carries high di/dt; requires minimal trace length and tight loop area with PGND and VIN caps. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power MOSFETs | High-side RDS(on) = 245–465 mΩ and low-side RDS(on) = 165–310 mΩ reduce BOM count and improve thermal performance over discrete solutions. |
| Auto PFM/PWM Mode Switching | Maintains >90% efficiency at full load and extends light-load efficiency via diode emulation - no external mode control required. |
| Internal Compensation | Eliminates external compensation network, simplifying layout and reducing design iterations for stable loop response. |
| 70 V Input Transient Protection | Withstands IEC 61000-4-5 surges without external clamping, lowering system cost and board space in harsh environments. |
| Pin Compatibility Across Family | Shares identical 8-pin DDA footprint with LMR36520 (2 A) and LMR336x0 series (36 V variants), enabling scalable power upgrades. |
Applications
| IP Network Cameras | Analog Security Cameras |
|---|---|
|
Use Scenario: Powering image sensor, ISP, and Ethernet PHY from unregulated 12–48 V PoE or battery-backed rail. IC Role / Device Role / Timing Role: Primary wide-VIN buck regulator providing clean, regulated 3.3 V or 5 V for digital and analog subsystems. Use Value: 26 µA quiescent current extends battery life in backup mode; 70 V transient tolerance handles PoE surge events. |
Use Scenario: Converting 24 V AC/DC or 36 V industrial rail to stable 5 V/12 V for CCD sensor bias and video amplifier stages. IC Role / Device Role / Timing Role: Main DC/DC converter delivering low-noise, ripple-controlled output for analog video signal integrity. Use Value: Internal compensation and fixed 400 kHz frequency simplify EMI filtering; thermal shutdown prevents field failures in enclosed housings. |
| HVAC Valve & Actuator Control | AC Drive & Servo Drive Control Modules |
|
Use Scenario: Supplying MCU, position encoder interface, and H-bridge gate drivers from 24–48 V factory bus. IC Role / Device Role / Timing Role: System power rail generator with robust enable sequencing and power-good signaling for safe actuation startup. Use Value: Precision EN threshold enables reliable brown-out detection; hiccup mode limits energy during motor stall faults. |
Use Scenario: Providing isolated logic supply and auxiliary rails for gate driver ICs, current sensing, and communication interfaces. IC Role / Device Role / Timing Role: Secondary non-isolated buck stage converting main DC bus to 5 V/3.3 V for control electronics. Use Value: 65 V max input supports 48 V nominal bus with margin; 1 A output covers typical control circuit load budgets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR36520ADDAR | Same 65 V input rating but 2 A output current; identical pinout and package; higher RDS(on) due to larger FETs. | Required where peak load exceeds 1 A (e.g., multi-sensor nodes or higher-power actuators). | Select when future-proofing for higher current or designing across multiple power tiers using shared layout. |
| LMR33610ADDAR | 36 V max input, same 1 A output and 8-pin DDA package; lower RDS(on); optimized for ≤36 V systems. | Suitable for 24 V industrial buses or automotive-derived 36 V supplies where 65 V headroom is unnecessary. | Choose for cost-sensitive 24–36 V applications where reduced voltage rating allows tighter parametric control and lower FET losses. |
Compared with LMR36510ADDAR, LMR36520ADDAR offers higher current headroom in the same footprint, while LMR33610ADDAR trades input voltage range for improved efficiency at lower VIN - both preserve layout reuse but target distinct voltage/current operating envelopes.
Availability
LMR36510ADDAR is available at Aetrix Electronics and suitable for IP network cameras, HVAC valve control, and AC drive control modules requiring stable component supply, long-term manufacturability, and consistent electrical performance across production batches.
Supply support for LMR36510ADDAR 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 industrial power conversion.
The LMR36510ADDAR belongs to TI's SIMPLE SWITCHER® family of easy-to-use DC/DC converters, designed specifically for rugged industrial applications demanding wide input range, high efficiency, and minimal external components.
FAQ
What is the maximum input voltage the LMR36510ADDAR can withstand without damage?
The LMR36510ADDAR has an absolute maximum input voltage rating of 70 V, verified per JEDEC stress testing. This transient tolerance enables robust operation in industrial environments subject to IEC 61000-4-5 surges. Continuous operation is rated up to 65 V; exceeding 70 V risks permanent damage even briefly. Always ensure input transient clamping or filtering remains within this limit for LMR36510ADDAR reliability.
Does the LMR36510ADDAR require external compensation components?
No, the LMR36510ADDAR features fully internal compensation, eliminating the need for external Type II or Type III compensation networks. This reduces bill-of-materials count, simplifies PCB layout, and accelerates design validation. The internal loop is optimized for stability with standard output capacitor ESR ranges and common inductor values - confirmed across all operating conditions for LMR36510ADDAR.
How does the power-good (PG) function behave during startup and fault conditions for the LMR36510ADDAR?
The LMR36510ADDAR PG pin is an open-drain output that remains low for ~4 ms after EN assertion, then goes high only when VOUT reaches 93–95% of target. It pulls low during thermal shutdown, current limit, short circuits, or EN deactivation. A built-in glitch filter ignores transients < tPG, ensuring reliable system reset signaling - behavior validated in all LMR36510ADDAR production units.
Can the LMR36510ADDAR operate efficiently at very light loads, such as 1 mA?
Yes, the LMR36510ADDAR automatically enters PFM mode below ~100 mA, achieving >80% efficiency at 1 mA output with 24 V input. Its 26 µA quiescent current and diode-emulation operation minimize input power draw while maintaining regulation - confirmed in TI's typical characteristics curves for LMR36510ADDAR across temperature and input voltage.
Is the LMR36510ADDAR pin-compatible with other members of the SIMPLE SWITCHER® family?
Yes, the LMR36510ADDAR uses an 8-pin HSOIC (DDA) package with identical pinout to LMR36520ADDAR (2 A, 65 V) and LMR33610ADDAR (1 A, 36 V). This enables direct layout reuse across current and voltage variants - a documented design feature of the LMR36510ADDAR family, verified in TI's device comparison table and package drawings.
LMR36510ADDAR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm Width)
- 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):
- 4.2V
- Voltage - Input (Max):
- 65V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 61.75V
- Current - Output:
- 1A
- Frequency - Switching:
- 400kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO PowerPad
LMR36510ADDAR FAQ
1.How can I place an order for LMR36510ADDAR through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR36510ADDAR 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 LMR36510ADDAR reliable?
The price and inventory of LMR36510ADDAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR36510ADDAR is usually 5 days.
3.What payment methods are accepted for LMR36510ADDAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR36510ADDAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR36510ADDAR?
LMR36510ADDAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR36510ADDAR 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 LMR36510ADDAR?
For technical support, including LMR36510ADDAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR36510ADDAR requirements.
6.How does Aetrix verify that LMR36510ADDAR is sourced from the original manufacturer or authorized distributors?
All LMR36510ADDAR 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 LMR36510ADDAR meets industry standards.
7.What is the process for return or replacement of LMR36510ADDAR?
All LMR36510ADDAR units undergo pre-shipment inspection (PSI). If there is an issue with LMR36510ADDAR, 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 LMR36510ADDAR part is unused and in its original packaging.
Return procedure for LMR36510ADDAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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