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Texas Instruments LMR23630APDRRT
- Part No.:
- LMR23630APDRRT
- Manufacturer:
- Texas Instruments
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LMR23630APDRRT.pdf
- Description:
- IC REG BUCK ADJ 3A 12SON
- Quantity:
- Payment:
- Shipping:
Inventory:993
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Product details
Overview
LMR23630APDRRT from Texas Instruments is a 36-V, 3-A synchronous step-down DC-DC converter in a 12-pin WSON package with wettable flanks and PowerPAD™. It delivers regulated output from 4 V to 36 V input, supports 400-kHz fixed switching frequency, integrates power MOSFETs (RDS(on) = 160 mΩ HS / 95 mΩ LS), and features precision enable, PGOOD flag, and hiccup-mode short-circuit protection. It is used in factory automation PLC CPU power supplies.
For engineers reviewing the LMR23630APDRRT datasheet, LMR23630APDRRT pinout, LMR23630APDRRT application, or LMR23630APDRRT equivalent, key selection considerations include its 400-kHz fixed-frequency operation, integrated PGOOD output, 75-µA no-load quiescent current in PFM mode, thermal shutdown at 170°C, and compatibility with 1% feedback resistors for precise VOUT setting.
Technical Context
The LMR23630APDRRT employs peak-current-mode control with internal compensation, eliminating external loop components. Its fixed 400-kHz switching frequency enables predictable EMI filtering and stable light-load regulation without frequency dithering.
This variant includes a dedicated open-drain PGOOD pin (Pin 6) with 92–96.5% VREF undervoltage/overvoltage thresholds and 1.5% hysteresis, and uses a precision 1.0-V reference (±2% over –40°C to +125°C) for accurate output voltage setting via external resistor divider.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4 V to 36 V - supports wide industrial input sources including 24-V rails and unregulated battery-derived supplies. |
| Output Current | 3 A continuous - sufficient for powering FPGA I/O banks, microcontroller cores, or industrial sensor interfaces. |
| Switching Frequency | Fixed 400 kHz - enables compact magnetics design and consistent EMI profile without RT resistor or sync clock. |
| Quiescent Current | 75 µA in PFM mode - extends runtime in always-on battery-powered asset tracking nodes. |
| PGOOD Function | Dedicated open-drain output with 150-µs rise deglitch - provides system-level power sequencing confirmation for downstream logic. |
| Thermal Protection | 170°C shutdown with 15°C hysteresis - prevents damage during sustained overload or poor PCB thermal layout. |
| Reference Voltage | 1.0 V ±2% over temperature - ensures ≤1% output error when using 1% FB resistors across full operating range. |
Pinout & Package
LMR23630APDRRT is housed in a 12-pin WSON (3.0 mm × 3.0 mm) package with wettable flanks and exposed thermal pad (Pin 9). The package supports automated optical inspection (AOI) and improves solder joint reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | SW | Switch node - connects directly to power inductor; carries high di/dt; requires low-inductance layout to minimize ringing. |
| 2 | BOOT | Bootstrap supply - powers high-side gate driver; requires 100-nF ceramic capacitor between BOOT and SW. |
| 3 | VCC | Internal LDO output - supplies bias for control circuitry; must be bypassed with 2.2-µF/16-V capacitor to AGND. |
| 4 | FB | Feedback input - senses output voltage via resistor divider; high-impedance analog node sensitive to noise coupling. |
| 5 | EN/SYNC | Enable and sync input - rising threshold 1.55 V; also accepts external clock for synchronization (200–2200 kHz). |
| 6 | PGOOD | Power-good flag - open-drain output active high when VOUT is within ±3.5% of target; requires external pullup. |
| 7 | AGND | Analog ground - reference for FB, EN/SYNC, and internal references; must connect to clean ground plane. |
| 8 | VIN | Main input supply - accepts 4–36 V; requires local 10-µF ceramic input capacitor near VIN and PGND pins. |
| 10 | PGND | Power ground - return path for high-current switches; must tie directly to CIN, COUT, and thermal pad. |
| 9 | Thermal Pad | Exposed die attach pad - primary heat dissipation path; must be soldered to ≥2 cm² copper pour on PCB layer 2. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous FETs | Eliminates external rectifier losses; achieves >90% efficiency at 1 A with 12-V input and 5-V output. |
| Internal compensation | Reduces BOM count by removing external Type II/III compensation network; simplifies layout and validation. |
| Soft-start into prebiased load | Prevents reverse current flow when enabling into an already-biased rail - critical for hot-swap and redundant supply systems. |
| Hiccup-mode short-circuit protection | Limits average power during output fault; automatically recovers after 5-ms (WSON) or 10-ms (HSOIC) delay. |
| Precision enable input | 1.55-V threshold with 0.4-V hysteresis enables clean power sequencing without external voltage supervisors. |
Applications
| PLC CPU Power Supply | HVAC Control Module |
|---|---|
|
Use Scenario: Powers ARM Cortex-M7 core and peripherals in modular programmable logic controller backplane slots. IC Role / Device Role / Timing Role: Primary 3.3-V/3-A buck regulator delivering stable core voltage under dynamic load steps up to 2 A/µs. Use Value: 75-µA PFM quiescent current minimizes standby loss; PGOOD confirms rail readiness before firmware boot. |
Use Scenario: Supplies 5-V logic and sensor interface circuitry in wall-mounted HVAC zone controllers. IC Role / Device Role / Timing Role: Wide-input buck converter accepting 12–30 V DC from building power bus. Use Value: 4-V minimum input supports brownout operation down to 12-V nominal bus; hiccup protection handles relay coil flyback faults. |
| Industrial Asset Tracker | Factory Automation I/O Module |
|
Use Scenario: Powers GPS/GNSS receiver, cellular modem, and MCU in battery-backed wireless asset monitors. IC Role / Device Role / Timing Role: Efficient step-down regulator converting 3.6–4.2 V Li-ion to 3.3 V for ultra-low-power sleep states. Use Value: 2-µA shutdown current extends multi-year battery life; soft-start prevents inrush-induced brownout during wake-up. |
Use Scenario: Generates isolated 5-V and 3.3-V rails for digital I/O expansion cards in industrial PC-based control systems. IC Role / Device Role / Timing Role: Non-isolated primary regulator feeding downstream isolated DC-DC converters. Use Value: Fixed 400-kHz frequency simplifies EMI filter design; thermal pad enables conduction cooling in dense card stacks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR23630FDRR | Adjustable frequency (RT pin); no PGOOD; same WSON-12 package and 3-A rating. | Suitable where frequency tuning or synchronization is required instead of power-good monitoring. | Select LMR23630FDRR only if board layout accommodates RT resistor and PGOOD is not needed for system sequencing. |
| LMR23625ADDA | 2.5-A rating in 8-pin HSOIC; fixed 400-kHz; no PGOOD; higher RDS(on) (185/105 mΩ). | Used in cost-sensitive, lower-current designs where smaller solution size is less critical than BOM cost. | Choose LMR23625ADDA only if 2.5-A output suffices and HSOIC thermal performance meets requirements. |
Compared with LMR23630FDRR and LMR23625ADDA, the LMR23630APDRRT uniquely combines fixed 400-kHz operation, 3-A capability, and integrated PGOOD in a thermally enhanced WSON package-making it optimal for space-constrained industrial systems requiring verified power-rail status.
Availability
LMR23630APDRRT is available at Aetrix Electronics and suitable for factory automation PLC CPU power supplies, HVAC control modules, and industrial asset trackers requiring stable component supply, long-term manufacturability, and automotive-grade reliability screening.
Supply support for LMR23630APDRRT 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 designing analog ICs, embedded processors, and power management solutions for industrial, automotive, and communications markets.
The LMR23630APDRRT belongs to TI's SIMPLE SWITCHER® family of easy-to-use DC-DC regulators, engineered specifically for rugged industrial environments requiring wide input range, high reliability, and minimal external components.
FAQ
What is the switching frequency configuration of the LMR23630APDRRT?
The LMR23630APDRRT is a fixed-frequency variant operating at 400 kHz by default. Unlike adjustable versions (e.g., LMR23630FDRR), it does not require an external RT resistor and lacks frequency programming capability. This simplifies design and ensures consistent EMI behavior across production units. The LMR23630APDRRT maintains this frequency across its full input and load range unless forced into PFM mode at very light loads.
Does the LMR23630APDRRT support power-good signaling?
Yes, the LMR23630APDRRT includes a dedicated open-drain PGOOD pin (Pin 6) that asserts high when output voltage is within ±3.5% of the target setpoint. It features 150-µs rise deglitch and 18-µs fall deglitch to reject transient noise. A 10-kΩ to 100-kΩ pullup resistor to a logic rail ≤12 V is required. This function is absent in non-APD variants like LMR23630FDRR or LMR23625ADDA.
What is the minimum input voltage required for the LMR23630APDRRT to regulate?
The LMR23630APDRRT begins regulation at 4 V input, with a typical UVLO rising threshold of 3.7 V and falling threshold of 2.9 V. Below 4 V, the device remains in shutdown and draws only 2–4 µA. This 4-V minimum enables reliable operation from partially discharged 5-V USB or 12-V battery systems, unlike many 5-V-input-only buck regulators.
How does the LMR23630APDRRT handle short-circuit conditions?
The LMR23630APDRRT responds to output short circuits with hiccup-mode protection: it limits peak inductor current, shuts down for 10 ms (WSON package), then attempts restart. This cycle repeats until the fault clears. Unlike constant-current limiting, hiccup mode prevents thermal runaway and allows safe operation without heatsinking-even under sustained shorts-making it suitable for unattended industrial deployments.
Can the LMR23630APDRRT be synchronized to an external clock?
No, the LMR23630APDRRT does not support external clock synchronization. Its EN/SYNC pin functions solely as a precision enable input (1.55-V threshold) and cannot accept SYNC signals. Synchronization capability is reserved for variants with "F" or "R" suffixes (e.g., LMR23630FDRR), which feature dedicated RT or SYNC functionality. Using the LMR23630APDRRT in noise-sensitive systems avoids potential jitter from external clock injection.
LMR23630APDRRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 12-WFDFN 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):
- 36V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 28V
- Current - Output:
- 3A
- Frequency - Switching:
- 400kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 12-SON (3x3)
LMR23630APDRRT FAQ
1.How can I place an order for LMR23630APDRRT through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR23630APDRRT 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 LMR23630APDRRT reliable?
The price and inventory of LMR23630APDRRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR23630APDRRT is usually 5 days.
3.What payment methods are accepted for LMR23630APDRRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR23630APDRRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR23630APDRRT?
LMR23630APDRRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR23630APDRRT 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 LMR23630APDRRT?
For technical support, including LMR23630APDRRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR23630APDRRT requirements.
6.How does Aetrix verify that LMR23630APDRRT is sourced from the original manufacturer or authorized distributors?
All LMR23630APDRRT 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 LMR23630APDRRT meets industry standards.
7.What is the process for return or replacement of LMR23630APDRRT?
All LMR23630APDRRT units undergo pre-shipment inspection (PSI). If there is an issue with LMR23630APDRRT, 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 LMR23630APDRRT part is unused and in its original packaging.
Return procedure for LMR23630APDRRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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