My Inquiry
My Account
Texas Instruments LMR23630AFDDAR
- Part No.:
- LMR23630AFDDAR
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMR23630AFDDAR.pdf
- Description:
- IC REG BUCK ADJ 3A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:3,517
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LMR23630AFDDAR from Texas Instruments is a 36-V, 3-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 and forced PWM modes, features internal compensation, 400-kHz fixed switching frequency, and 75-μA quiescent current-ideal for industrial PLC CPU power rails and HVAC control subsystems.
For engineers reviewing the LMR23630AFDDAR datasheet, LMR23630AFDDAR pinout, LMR23630AFDDAR application, or LMR23630AFDDAR equivalent, key selection criteria include input voltage range (4–36 V), continuous output current (3 A), thermal performance (RθJA = 42.0°C/W), enable threshold (1.4–1.7 V), and feedback reference (1.0 V ±1.5%).
Technical Context
The LMR23630AFDDAR employs peak-current-mode control with internal loop compensation, eliminating external compensation components. Its fixed 400-kHz switching frequency enables predictable EMI filtering and stable light-load regulation in FPWM mode.
It integrates high-side and low-side NMOS FETs (RDS(on) = 185 mΩ / 105 mΩ), supports soft-start into prebiased loads, and includes precision enable with 0.4-V wake-up threshold and 0.4-V hysteresis-enabling robust system power sequencing in factory automation environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4 V to 36 V - supports wide-input industrial supplies including 24-V rail and battery-backed systems. |
| Output Current | 3 A continuous - sufficient for powering microcontrollers, I/O drivers, and sensor interfaces in PLC modules. |
| Switching Frequency | Fixed 400 kHz - enables compact magnetics design and deterministic EMI profile without external RT resistor. |
| Quiescent Current | 75 μA in PFM mode - extends battery life in asset-tracking devices operating intermittently. |
| Feedback Reference | 1.0 V ±1.5% over –40°C to +125°C - ensures tight output regulation across industrial temperature range. |
| Enable Threshold | 1.4–1.7 V rising, 0.4 V hysteresis - allows direct connection to 3.3-V logic or resistive UVLO programming. |
| Thermal Shutdown | 162–178°C with 15°C hysteresis - protects against sustained overload in enclosed enclosures. |
Pinout & Package
LMR23630AFDDAR uses an 8-pin HSOIC (4.89 mm × 3.90 mm) package with exposed PowerPAD™ thermal pad for enhanced heat dissipation. The package is RoHS-compliant and designed for surface-mount reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switch node | Connects to inductor; carries high di/dt switching current - requires short, low-inductance PCB trace. |
| 2 BOOT | Bootstrap supply | Drives high-side gate; requires 100 nF ceramic capacitor between BOOT and SW for reliable operation. |
| 3 VCC | Internal bias LDO output | Supplies internal circuitry; must be bypassed with 2.2-μF/16-V capacitor to AGND - no external load allowed. |
| 4 FB | Feedback input | Senses output via resistor divider; 1-V reference enables precise VOUT setting (e.g., 3.3 V or 5 V). |
| 5 EN/SYNC | Enable & sync input | Active-high enable with 1.55-V typical threshold; also accepts external clock for synchronization (200–2200 kHz). |
| 6 AGND | Analog ground | Reference for FB, EN, and internal circuits - must connect to clean ground plane separate from PGND. |
| 7 VIN | Main input supply | Accepts 4–36 V; requires local 10-μF ceramic input capacitor placed near pin for stability. |
| 8 PGND | Power ground | Low-side MOSFET source return; connects to CIN, COUT, and PowerPAD™ - forms high-current return path. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous rectification | Eliminates external Schottky diode - reduces conduction loss and improves efficiency at full load. |
| Internal compensation | Removes need for external Type-II/III compensation network - simplifies layout and accelerates design cycle. |
| PFM and forced PWM modes | Enables >90% efficiency at light load (PFM) and <15-mV ripple at 3.3-V/1-A output (FPWM) - adaptable to dynamic load profiles. |
| Soft start into prebiased load | Prevents output voltage overshoot when powering up partially charged rails - critical for hot-swap and redundant supply designs. |
| Hiccup-mode short-circuit protection | Limiting fault duration to ~5 ms (HSOIC) before retry - prevents thermal runaway during sustained output shorts. |
Applications
| PLC CPU Power Supply | HVAC Control Module |
|---|---|
|
Use Scenario: Powers ARM Cortex-M7-based CPU and peripheral I/O in modular programmable logic controllers. IC Role / Device Role / Timing Role: Primary 3.3-V/3-A buck regulator delivering stable core voltage under variable load transients. Use Value: 75-μA quiescent current minimizes standby power draw; 400-kHz fixed frequency simplifies EMI filter design for CE compliance. |
Use Scenario: Supplies 5-V rail for temperature sensors, relay drivers, and CAN transceivers in building management systems. IC Role / Device Role / Timing Role: Wide-input step-down regulator handling 24-V nominal supply with brownout tolerance down to 4 V. Use Value: Precision enable input (1.55-V threshold) interfaces directly with 3.3-V microcontroller GPIO for controlled power-up sequencing. |
| Industrial Asset Tracker | Factory Automation I/O Hub |
|
Use Scenario: Powers GPS module, cellular modem, and MCU in battery-operated equipment monitoring tools. IC Role / Device Role / Timing Role: High-efficiency DC-DC converter enabling multi-year battery life via PFM mode at microamp loads. Use Value: 2-μA shutdown current extends shelf life; hiccup-mode protection prevents battery drain during field wiring faults. |
Use Scenario: Generates isolated 3.3-V and 5-V rails for digital I/O expansion cards in industrial PC-based control systems. IC Role / Device Role / Timing Role: Compact, thermally robust buck stage supporting high-density board layouts with minimal heatsinking. Use Value: PowerPAD™ package achieves 42.0°C/W junction-to-ambient thermal resistance - sustains 3-A output at 70°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR23630ADDA | Same HSOIC-8 package and 400-kHz fixed frequency, but lacks FPWM mode - operates only in PFM. | No forced PWM option; unsuitable where low-light-load ripple is required (e.g., analog sensor front-ends). | Select LMR23630ADDA only if PFM-only operation suffices and FPWM is not needed for noise-sensitive loads. |
| LMR23625ADDA | Pin-compatible 2.5-A variant with identical footprint, 400-kHz frequency, and FPWM support - lower current rating. | Lower max output current limits use in 3-A applications; suitable for cost-optimized 2-A designs with same layout. | Choose LMR23625ADDA when 2.5-A output is sufficient and BOM cost reduction is prioritized over headroom. |
Compared with LMR23630AFDDAR, LMR23630ADDA trades FPWM capability for simpler control, while LMR23625ADDA offers identical functionality at reduced current capacity-both retain pin compatibility but require validation of thermal margin and ripple performance in final design.
Availability
LMR23630AFDDAR is available at Aetrix Electronics and suitable for factory automation systems, HVAC control modules, and industrial asset trackers requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LMR23630AFDDAR 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 and embedded processing technologies, with decades of expertise in power management ICs for industrial, automotive, and communications markets.
The LMR23630AFDDAR belongs to TI's SIMPLE SWITCHER® family of easy-to-use DC-DC converters, engineered specifically for rugged industrial applications demanding wide input range, high reliability, and minimal external components.
FAQ
What is the maximum input voltage rating for the LMR23630AFDDAR?
The LMR23630AFDDAR has an absolute maximum input voltage rating of 42 V, with recommended operating input range from 4 V to 36 V. Exceeding 36 V continuously may trigger undervoltage lockout or reduce reliability; operation above 42 V risks permanent damage per datasheet Section 7.1.
Does the LMR23630AFDDAR require external compensation components?
No, the LMR23630AFDDAR features fully internal loop compensation. This eliminates the need for external Type-II or Type-III compensation networks, reducing bill-of-materials count and simplifying PCB layout - a key advantage confirmed in Section 8.3.1 and Table 7-5 of the datasheet.
Can the LMR23630AFDDAR synchronize to an external clock signal?
Yes, the LMR23630AFDDAR supports frequency synchronization via its EN/SYNC pin. An AC-coupled external clock signal (200–2200 kHz, 2.8–5.5 V amplitude) can be injected to align switching edges - detailed in Section 7.7 and Figure 8-2 of the official datasheet.
What is the thermal resistance (RθJA) of the LMR23630AFDDAR in its HSOIC package?
The LMR23630AFDDAR in the 8-pin HSOIC package has a junction-to-ambient thermal resistance (RθJA) of 42.0°C/W, measured under standard JEDEC JESD51-7 conditions. This value assumes a 2-layer PCB with 1-in² copper area and is critical for calculating maximum allowable power dissipation at target ambient temperatures.
How does the LMR23630AFDDAR handle short-circuit conditions?
The LMR23630AFDDAR responds to output short circuits with hiccup-mode protection: after six consecutive current-limit cycles (NOC = 64), it shuts down for 5 ms (HSOIC) before attempting restart. This prevents thermal runaway while maintaining self-recovery - specified in Section 7.6 and Section 8.3.5 of the datasheet.
LMR23630AFDDAR 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):
- 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
- Supplier Device Package:
- 8-SO PowerPad
LMR23630AFDDAR FAQ
1.How can I place an order for LMR23630AFDDAR through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR23630AFDDAR 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 LMR23630AFDDAR reliable?
The price and inventory of LMR23630AFDDAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR23630AFDDAR is usually 5 days.
3.What payment methods are accepted for LMR23630AFDDAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR23630AFDDAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR23630AFDDAR?
LMR23630AFDDAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR23630AFDDAR 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 LMR23630AFDDAR?
For technical support, including LMR23630AFDDAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR23630AFDDAR requirements.
6.How does Aetrix verify that LMR23630AFDDAR is sourced from the original manufacturer or authorized distributors?
All LMR23630AFDDAR 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 LMR23630AFDDAR meets industry standards.
7.What is the process for return or replacement of LMR23630AFDDAR?
All LMR23630AFDDAR units undergo pre-shipment inspection (PSI). If there is an issue with LMR23630AFDDAR, 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 LMR23630AFDDAR part is unused and in its original packaging.
Return procedure for LMR23630AFDDAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMR23630AFDDAR Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
