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Texas Instruments LMR23630APDRRR
- Part No.:
- LMR23630APDRRR
- Manufacturer:
- Texas Instruments
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LMR23630APDRRR.pdf
- Description:
- IC REG BUCK ADJ 3A 12SON
- Quantity:
- Payment:
- Shipping:
Inventory:3,080
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Product details
Overview
LMR23630APDRRR 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™ thermal pad. It delivers regulated output from 4 V to 36 V input, supports 400-kHz fixed switching frequency, includes integrated PGOOD flag, and operates with 75-µA quiescent current in PFM mode for industrial power conditioning in PLC CPU and HVAC control systems.
For engineers reviewing the LMR23630APDRRR datasheet, LMR23630APDRRR pinout, LMR23630APDRRR application, or LMR23630APDRRR equivalent, key selection considerations include its 400-kHz fixed-frequency operation, integrated power-good output, precision enable input, hiccup-mode short-circuit protection, and thermal performance in the 3.00 mm × 3.00 mm WSON package.
Technical Context
The LMR23630APDRRR employs peak-current-mode control with internal compensation, enabling stable regulation across wide input (4–36 V) and output (1–28 V) ranges without external loop components. Its fixed 400-kHz switching frequency eliminates RT resistor dependency, while the dedicated PGOOD pin provides open-drain power-good signaling with 104–110% overvoltage and 92–96.5% undervoltage thresholds relative to the 1-V reference.
This variant integrates a precision enable input with 1.4–1.7-V rising threshold and 0.4-V hysteresis, supporting system-level power sequencing. Protection architecture includes cycle-by-cycle current limiting (HS limit: 4–6.6 A), thermal shutdown at 162–178°C, and hiccup-mode recovery after 64 cycles of LS current-limit tripping - all implemented within the monolithic IC die.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4 V to 36 V - enables direct regulation from unregulated industrial rails including 24-V DC and automotive battery inputs. |
| Output Current | 3 A continuous - supports mid-power loads such as microcontroller cores, FPGAs, and sensor subsystems without external current boosting. |
| Switching Frequency | Fixed 400 kHz - ensures predictable EMI profile and simplifies filter design; no RT resistor required. |
| Quiescent Current | 75 µA in PFM mode - extends battery life in always-on industrial monitoring nodes. |
| Power-Good Output | Open-drain PGOOD with 150-µs rise deglitch - provides reliable system reset and sequencing signal for downstream logic. |
| Enable Threshold | 1.55 V typical rising threshold with 0.4-V hysteresis - allows clean, noise-immune startup control from MCU GPIO or supervisor ICs. |
| Thermal Shutdown | 170°C typical trip point with 15°C hysteresis - protects against sustained overload or poor PCB thermal design. |
Pinout & Package
LMR23630APDRRR uses a 12-pin WSON (wettable flanks) package measuring 3.00 mm × 3.00 mm with exposed thermal pad (Pin 9). The package supports automated optical inspection (AOI) and improves solder joint reliability in high-reliability applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EN/SYNC | Enable & sync input | Logic-level enable with 1.55-V threshold; also accepts external clock for synchronization (200–2200 kHz). |
| 2 - AGND | Analog ground | Reference for FB, VREF, and internal bias circuits; must be connected to low-noise system ground plane. |
| 3 - VIN | Main power input | Accepts 4–36 V; requires local 10-µF ceramic input capacitor placed near this pin and PGND. |
| 4 - PGND | Power ground | Return path for high-current MOSFETs; must be tied directly to thermal pad and CIN/COUT grounds with minimal trace length. |
| 5 - SW | Switch node | Drives external inductor; connects internally to both HS and LS MOSFETs; requires tight layout to minimize ringing. |
| 6 - BOOT | Bootstrap supply | Supplies gate drive for high-side MOSFET; requires 100-nF or 470-nF ceramic capacitor between BOOT and SW. |
| 7 - VCC | Bias LDO output | Internal 4.1-V LDO output; bypassed with 2.2-µF/16-V capacitor to AGND; no external load permitted. |
| 8 - FB | Feedback input | Senses output voltage via resistor divider; references internal 1-V precision bandgap (±2% over temp). |
| 9 - PAD | Thermal pad | Primary heat dissipation path; must be soldered to large copper pour connected to PGND for RθJB = 16.3°C/W. |
| 10 - PGOOD | Power-good flag | Open-drain output active when VOUT is within ±7% of target; requires 10–100-kΩ pullup to logic rail ≤12 V. |
| 11 - NC | No connect | Not internally bonded; must remain floating per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated PGOOD output | Provides system-level power sequencing and fault detection without external comparators or discrete logic. |
| Fixed 400-kHz switching | Eliminates RT resistor placement and tolerance sensitivity, reducing BOM count and layout complexity. |
| Internal loop compensation | Removes need for external Type II/III compensation network, accelerating design time and improving stability margin. |
| Hiccup-mode short-circuit protection | Shuts down for 5–10 ms after 64 consecutive current-limit events, preventing thermal runaway during sustained faults. |
| Wettable flanks WSON package | Enables automated optical inspection of solder joints, improving manufacturing yield and field reliability in industrial environments. |
Applications
| PLC CPU Power Supply | HVAC Control Module |
|---|---|
Use Scenario: Regulating 24-V DC bus to 3.3-V or 5-V for ARM Cortex-M7 microcontrollers and real-time Ethernet PHYs in programmable logic controllers. IC Role / Device Role / Timing Role: Primary buck regulator delivering 3-A continuous current with tight load regulation (<±1%) and fast transient response to CPU burst loads. Use Value: Enables single-stage conversion from factory 24-V supply, eliminating intermediate 12-V stages and reducing board area by 35% versus discrete solutions. | Use Scenario: Powering temperature sensors, valve drivers, and wireless transceivers in commercial building HVAC controllers operating across –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Main power IC providing regulated 3.3-V output with PGOOD signaling to enable MCU watchdog reset and fault logging upon brownout. Use Value: 75-µA quiescent current and 2-µA shutdown current extend battery backup runtime during AC mains failure by >48 hours. |
| Asset Tracking Unit | Industrial I/O Module |
Use Scenario: Converting 3.6-V Li-SOCl₂ primary battery or 12-V vehicle supply to 1.8-V for ultra-low-power GNSS receivers and NB-IoT modems in remote asset trackers. IC Role / Device Role / Timing Role: Synchronous buck converter operating in PFM mode at microamp loads, maintaining >85% efficiency down to 100-µA output current. Use Value: Minimum 60-ns on-time supports high duty-cycle operation at 3.6-V input → 1.8-V output, enabling full battery utilization without dropout. | Use Scenario: Providing isolated 5-V and ±15-V analog supply rails for 16-bit ADCs and precision op-amps in modular industrial data acquisition systems. IC Role / Device Role / Timing Role: Pre-regulator feeding isolated DC-DC modules; delivers 3-A at 5 V with <10-mV load regulation error over 0–3-A range. Use Value: Integrated current-mode control and thermal protection ensure robust operation during hot-swap insertion and transient overloads in rack-mounted I/O chassis. |
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 package and 3-A rating. | Lacks power-good signaling; requires external circuitry for system sequencing or fault reporting. | Select when frequency tuning (200 kHz–2.2 MHz) is needed and PGOOD is not required. |
| LMR23625ADDA | 2.5-A HSOIC-8 variant with fixed 400-kHz frequency and no PGOOD; different package and lower current rating. | Smaller footprint but lower current capability; lacks PGOOD and has higher RDS(on) (185 mΩ HS vs 160 mΩ). | Select only if board space is constrained and 2.5-A max load suffices; verify thermal margin with RθJA = 42.0°C/W. |
Compared with LMR23630FDRR and LMR23625ADDA, the LMR23630APDRRR uniquely combines fixed-frequency simplicity, integrated PGOOD, and 3-A capability in the thermally optimized WSON-12 package - making it optimal for industrial systems requiring reliable power sequencing and high current density.
Availability
LMR23630APDRRR is available at Aetrix Electronics and suitable for factory automation, building HVAC control, and asset tracking applications requiring stable component supply, long-term industrial lifecycle support, and consistent parametric performance across temperature extremes.
Supply support for LMR23630APDRRR 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 industrial-grade DC-DC conversion.
The LMR23630APDRRR belongs to TI's SIMPLE SWITCHER® family - designed specifically for rugged, easy-to-use power conversion in industrial, factory automation, and building control systems where reliability, thermal performance, and minimal external components are critical.
FAQ
What is the switching frequency configuration of the LMR23630APDRRR?
The LMR23630APDRRR is configured for fixed 400-kHz operation - no external RT resistor is required or supported. This differs from adjustable-frequency variants like LMR23630FDRR. The 400-kHz frequency is factory-trimmed and remains stable across temperature and line variations, simplifying EMI filtering and reducing component count. LMR23630APDRRR does not support frequency adjustment via the RT pin.
Does the LMR23630APDRRR include a power-good output, and how is it used?
Yes, the LMR23630APDRRR includes an open-drain PGOOD pin (Pin 10) that asserts low when output voltage deviates beyond ±7% of the target (e.g., 4.65–5.35 V for a 5-V output). It requires a 10–100-kΩ pullup resistor to a logic rail ≤12 V. This signal enables safe system startup sequencing, MCU reset assertion, and fault logging - eliminating need for external voltage monitors. LMR23630APDRRR's PGOOD is not present in non-"P" variants like LMR23630FDRR.
What thermal performance can be expected from the LMR23630APDRRR in its WSON package?
The LMR23630APDRRR in the 12-pin WSON package achieves RθJA = 41.5°C/W and RθJB = 16.3°C/W when mounted on a 2-layer PCB with 1-in² 2-oz copper thermal pad connected to PGND. With 3-A load at 12-V input and 5-V output, junction temperature rise is ~65°C above ambient - well within the 125°C max operating limit. The exposed thermal pad (Pin 9) must be soldered to a solid ground plane; omitting this reduces thermal performance by >40%.
How does the enable input of the LMR23630APDRRR support power sequencing in industrial systems?
The LMR23630APDRRR's EN/SYNC pin (Pin 1) features a precise 1.55-V typical enable threshold with 0.4-V hysteresis, allowing clean, noise-immune startup control from MCU GPIOs or supervisor ICs. It supports direct connection to VIN for always-on operation or to a sequenced rail for controlled power-up order. Unlike basic enable inputs, this pin also accepts external clock signals (200–2200 kHz) for EMI reduction - a capability retained even in fixed-frequency LMR23630APDRRR.
What protection features are integrated into the LMR23630APDRRR?
The LMR23630APDRRR integrates cycle-by-cycle current limiting (HS peak limit: 4–6.6 A), hiccup-mode short-circuit protection (triggers after 64 current-limit events, then retries every 5–10 ms), thermal shutdown (170°C typical), VIN undervoltage lockout (3.7-V rising threshold), and VCC undervoltage lockout (3.2-V rising threshold). These protections operate autonomously without external components - ensuring robust operation during input transients, output shorts, or thermal overload conditions common in industrial environments.
LMR23630APDRRR 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)
LMR23630APDRRR FAQ
1.How can I place an order for LMR23630APDRRR through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR23630APDRRR 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 LMR23630APDRRR reliable?
The price and inventory of LMR23630APDRRR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR23630APDRRR is usually 5 days.
3.What payment methods are accepted for LMR23630APDRRR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR23630APDRRR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR23630APDRRR?
LMR23630APDRRR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR23630APDRRR 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 LMR23630APDRRR?
For technical support, including LMR23630APDRRR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR23630APDRRR requirements.
6.How does Aetrix verify that LMR23630APDRRR is sourced from the original manufacturer or authorized distributors?
All LMR23630APDRRR 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 LMR23630APDRRR meets industry standards.
7.What is the process for return or replacement of LMR23630APDRRR?
All LMR23630APDRRR units undergo pre-shipment inspection (PSI). If there is an issue with LMR23630APDRRR, 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 LMR23630APDRRR part is unused and in its original packaging.
Return procedure for LMR23630APDRRR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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