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Texas Instruments LMR23610ADDAR
- Part No.:
- LMR23610ADDAR
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMR23610ADDAR.pdf
- Description:
- IC REG BUCK ADJ 1A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:3,794
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Product details
Overview
LMR23610ADDAR from Texas Instruments is a 36-V, 1-A synchronous step-down DC/DC converter in an 8-pin HSOIC package with PowerPAD™. It delivers regulated output from 4 V to 36 V input, supports PFM mode for 75 µA quiescent current, features internal compensation, and integrates high- and low-side MOSFETs (RDS(on) = 185 mΩ / 105 mΩ) for industrial power conditioning in PLCs and HVAC controllers.
For engineers reviewing the LMR23610ADDAR datasheet, LMR23610ADDAR pinout, LMR23610ADDAR application, or LMR23610ADDAR equivalent, key selection considerations include its 400-kHz fixed-frequency peak-current-mode control, 60-ns minimum on-time, VIN UVLO thresholds (3.3 V rising / 2.9 V falling), thermal shutdown at 170°C, and synchronization capability up to 2.2 MHz - all critical for wide-input battery- and line-powered systems.
Technical Context
The LMR23610ADDAR employs fixed-frequency peak-current-mode control with internal loop compensation, enabling stable regulation across ceramic capacitor types without external compensation components. Its dual-MOSFET architecture supports continuous 1-A output with cycle-by-cycle current limiting (HS limit: 2.6 A typ, LS limit: 2.1 A typ) and hiccup-mode short-circuit protection.
It operates in PWM mode under normal load and transitions to PFM mode below ~100 mA to maintain >85% efficiency at 100 µA load. Frequency synchronization (200 kHz–2.2 MHz) and programmable enable threshold (1.55 V typ, 0.4 V hysteresis) support precise system power sequencing and EMI control in noise-sensitive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4 V to 36 V - supports direct connection to 12 V/24 V industrial rails and automotive batteries with transient tolerance up to 42 V. |
| Output Current | 1 A continuous - sufficient for powering microcontrollers, sensors, and I/O peripherals in factory automation nodes. |
| Switching Frequency | 400 kHz default, syncable 200 kHz–2.2 MHz - enables layout optimization and EMI filtering while maintaining >90% efficiency at full load. |
| Quiescent Current | 75 µA in PFM mode - extends runtime in always-on battery-backed systems such as smart meters and remote telemetry. |
| UVLO Threshold | 3.3 V (rising), 2.9 V (falling) - ensures clean startup/shutdown during brownout conditions in unregulated 5 V or 3.3 V auxiliary rails. |
| Thermal Shutdown | 170°C with 15°C hysteresis - protects against sustained overload or poor PCB heatsinking in enclosed enclosures. |
| Min On-Time | 60 ns - enables high-duty-cycle operation down to 1.2 V output at 36 V input without frequency foldback. |
Pinout & Package
Package: 8-pin HSOIC (DDA) with exposed thermal pad (4.89 mm × 3.90 mm); designed for high-power density and thermal reliability via PCB copper pour under the PowerPAD™.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switch node | Connects to inductor; carries high di/dt switching current - requires short, low-inductance trace to minimize EMI and voltage spikes. |
| 2 BOOT | Bootstrap supply | Drives high-side gate; requires 470-nF ceramic capacitor between BOOT and SW for reliable NMOS turn-on. |
| 3 VCC | Bias LDO output | Internal 4.1-V LDO output; must be bypassed with 2.2-µF/16-V ceramic cap to AGND/PAD - no external loading permitted. |
| 4 FB | Voltage feedback input | Monitors resistive divider (VREF = 1.0 V ±2%) - sets output voltage; sensitive to noise; requires tight routing near AGND. |
| 5 EN/SYNC | Enable & sync input | Dual-function: logic-level enable (1.55 V threshold) or AC-coupled sync signal (2.8 V min amplitude, 100 ns min pulse width). |
| 6 AGND | Analog ground | Reference for FB, EN, and internal references - must connect directly to PGND and thermal pad with low-impedance path. |
| 7 VIN | Main input supply | Accepts 4–36 V; requires local 10-µF ceramic input capacitor placed close to VIN and PGND pins. |
| 8 PGND | Power ground | Low-side FET source return; connects internally to thermal pad - forms primary current return path for high di/dt loops. |
| Pad | Thermal ground | Exposed die attach pad; must be soldered to large PCB copper area tied to PGND/AGND for thermal dissipation (RθJA = 42°C/W). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous rectification | Eliminates external Schottky diode; reduces conduction loss by >30% vs. asynchronous buck at 1 A, improving full-load efficiency to >92%. |
| Internal compensation | Removes need for external Type-II/III compensation network - cuts BOM count by ≥3 components and simplifies layout validation. |
| Soft-start into prebiased output | Prevents reverse current flow when powering up into existing VOUT bias (e.g., hot-swap or backup rail scenarios), avoiding damage to downstream circuitry. |
| Precision enable input | 1.55 V threshold with 0.4 V hysteresis enables accurate system-level UVLO using resistor dividers - critical for battery discharge management in portable equipment. |
| Hiccup-mode short-circuit protection | Trips after 64 consecutive current-limit cycles, then retries every 5 ms - limits average power dissipation during fault, preventing thermal runaway. |
Applications
| Industrial PLC Power Supply | GSM/GPRS Module Regulation |
|---|---|
Use Scenario: Powers ARM Cortex-M7 CPU, CAN transceiver, and analog I/O in DIN-rail mounted programmable logic controllers operating from 24 V DC field bus. IC Role / Device Role / Timing Role: Primary 3.3 V/1 A point-of-load regulator; provides stable rail during motor switching transients and ESD events per IEC 61000-4-2/4-4. Use Value: 75 µA quiescent current maintains low standby power; 400-kHz switching allows compact 22 µH inductor and 47 µF ×2 output capacitance. | Use Scenario: Supplies 5 V/1 A to cellular modem, GPS receiver, and SIM interface in fleet telematics units powered by vehicle battery (9–16 V nominal, up to 36 V load dump). IC Role / Device Role / Timing Role: Wide-VIN buck converter with hiccup-mode protection; handles cold-crank (4.5 V) and load-dump (36 V) events without latch-off. Use Value: 60 ns min on-time sustains regulation down to 4 V input; thermal shutdown prevents failure during extended parking-mode operation. |
| Smart Grid Sensor Node | Building HVAC Controller |
Use Scenario: Powers ultra-low-power MCU, RF transceiver, and environmental sensors in battery-operated AMI endpoint devices deployed in utility substations. IC Role / Device Role / Timing Role: Always-on power manager; enters PFM mode at <100 µA load to extend 3.6 V Li-SOCl₂ battery life beyond 10 years. Use Value: 2 µA shutdown current (VEN = 0 V) enables deep sleep; precision enable allows wake-up via external interrupt without leakage-induced false triggers. | Use Scenario: Regulates 5 V for microcontroller, relay drivers, and temperature/humidity sensor in wall-mounted HVAC thermostats powered from 24 VAC transformer with bridge rectifier. IC Role / Device Role / Timing Role: Input-capacitor tolerant buck converter; withstands 100 Vpk rectified ripple and 120 Hz line-frequency dips without dropout. Use Value: Internal LDO (VCC = 4.1 V) supplies gate drivers independently of output rail; frequency sync eliminates beat frequencies with other SMPS in multi-rail systems. |
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 |
|---|---|---|---|
| LMR23625ADDAR | 2.5-A output, identical 8-pin HSOIC package and pinout, same 4–36 V input range and 400-kHz base frequency. | Higher current capability for systems scaling to dual-core MCUs or additional peripheral rails. | Select when future-proofing for higher load or sharing PCB layout with 2.5-A variant family members. |
| TPS54331DR | 3-A output, SOIC-8 package, 3.5–28 V input, 570-kHz fixed frequency, no PFM mode - higher IQ (145 µA) and no sync capability. | Lacks light-load efficiency optimization and external clock sync; suited for cost-sensitive non-battery applications. | Choose only if 3-A output is required and PFM/sync features are unnecessary; verify thermal performance at 1 A due to higher RDS(on). |
Compared with LMR23610ADDAR, the LMR23625ADDAR offers seamless current scalability in the same footprint, while the TPS54331DR trades light-load efficiency and flexibility for higher peak current - making LMR23610ADDAR optimal for battery-backed or EMI-constrained designs requiring 1-A output.
Availability
LMR23610ADDAR is available at Aetrix Electronics and suitable for industrial PLCs, GSM/GPRS telemetry modules, and smart grid sensor nodes requiring stable component supply across long production lifecycles and varying input voltage conditions.
Supply support for LMR23610ADDAR 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 decades of expertise in high-reliability industrial and automotive power solutions.
The LMR23610ADDAR belongs to TI's SIMPLE SWITCHER® family of easy-to-use DC/DC regulators, engineered specifically for robust, low-component-count power conversion in harsh industrial environments where wide input range and thermal resilience are mandatory.
FAQ
What is the maximum input voltage rating for the LMR23610ADDAR?
The LMR23610ADDAR has an absolute maximum input voltage rating of 42 V, though its recommended operating range is 4 V to 36 V. This 42-V rating accommodates transient overvoltages such as automotive load dump events. Operation above 36 V is not guaranteed for regulation or thermal performance, and prolonged exposure may trigger thermal shutdown or reduce lifetime reliability.
Does the LMR23610ADDAR require external compensation components?
No, the LMR23610ADDAR features fully internal compensation, eliminating the need for external Type-II or Type-III compensation networks. This reduces BOM count and layout complexity. However, a feed-forward capacitor (CFF) across the top feedback resistor is recommended for improved transient response when using all-ceramic output capacitors.
Can the LMR23610ADDAR operate with a 3.3-V output and 12-V input?
Yes, the LMR23610ADDAR supports 3.3-V output with 12-V input using a standard resistor divider on the FB pin (VREF = 1.0 V). Efficiency exceeds 90% at 1-A load under these conditions, as confirmed in Figure 2 of the datasheet. The device maintains regulation across line and load variations with ±1% output accuracy over temperature.
How does the EN/SYNC pin function in synchronization mode for the LMR23610ADDAR?
In sync mode, the EN/SYNC pin accepts an AC-coupled external clock signal (200 kHz–2.2 MHz) with ≥2.8 V peak-to-peak amplitude and ≥100 ns minimum ON/OFF time. A 1-nF coupling capacitor and 100-kΩ Thevenin impedance (e.g., RENT//RENB) are recommended. The internal oscillator locks to the external clock edge, enabling EMI reduction through frequency alignment in multi-rail systems.
What thermal management practices are required for reliable operation of the LMR23610ADDAR?
Reliable thermal operation of the LMR23610ADDAR requires soldering the exposed PowerPAD™ to a minimum 200 mm² copper area connected to PGND/AGND. Use ≥4 thermal vias (0.3-mm diameter) under the pad. With this layout, the device achieves RθJA = 42°C/W. At 1-A load and 25°C ambient, junction temperature rise is ~42°C - staying well below the 125°C max operating limit.
LMR23610ADDAR 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):
- 4.5V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 28V
- 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
LMR23610ADDAR FAQ
1.How can I place an order for LMR23610ADDAR through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR23610ADDAR 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 LMR23610ADDAR reliable?
The price and inventory of LMR23610ADDAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR23610ADDAR is usually 5 days.
3.What payment methods are accepted for LMR23610ADDAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR23610ADDAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR23610ADDAR?
LMR23610ADDAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR23610ADDAR 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 LMR23610ADDAR?
For technical support, including LMR23610ADDAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR23610ADDAR requirements.
6.How does Aetrix verify that LMR23610ADDAR is sourced from the original manufacturer or authorized distributors?
All LMR23610ADDAR 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 LMR23610ADDAR meets industry standards.
7.What is the process for return or replacement of LMR23610ADDAR?
All LMR23610ADDAR units undergo pre-shipment inspection (PSI). If there is an issue with LMR23610ADDAR, 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 LMR23610ADDAR part is unused and in its original packaging.
Return procedure for LMR23610ADDAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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