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Texas Instruments LM2936MMX-3.3
- Part No.:
- LM2936MMX-3.3
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM2936MMX-3.3.pdf
- Description:
- IC REG LINEAR 3.3V 50MA 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,779
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Product details
Overview
LM2936MMX-3.3 from Texas Instruments is an ultra-low quiescent current (≤15 μA at 100 μA load), fixed 3.3 V, 50 mA LDO voltage regulator in an 8-pin VSSOP package with reverse battery protection, −50 V reverse transient tolerance, and 40 V maximum operating input voltage. It targets automotive and battery-powered systems requiring long standby life and robust input fault resilience.
For engineers reviewing the LM2936MMX-3.3 datasheet, LM2936MMX-3.3 pinout, LM2936MMX-3.3 application, or LM2936MMX-3.3 equivalent, key selection criteria include dropout voltage (200 mV @ 50 mA), ±2% initial output tolerance, thermal shutdown behavior, ESR-sensitive output capacitor requirements, and compatibility with low-ESR ceramic capacitors down to 22 µF.
Technical Context
The LM2936MMX-3.3 uses a PNP pass transistor architecture enabling low dropout operation while maintaining regulation up to 40 V input. Its internal circuitry integrates reverse battery protection, short-circuit current limiting (65–250 mA), and thermal shutdown triggered at ~160°C junction temperature.
It operates across −40°C to +125°C ambient, supports stable regulation with 22 µF output capacitance (0.3–8 Ω ESR range), and delivers 50 mA output current with ≤0.4 V dropout at full load - critical for maintaining rail integrity in wide-input automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V with ±2% initial tolerance; ensures precise MCU core or sensor supply without external feedback. |
| Quiescent Current | ≤15 μA at 100 μA load; enables >10-year battery life in always-on telematics modules. |
| Dropout Voltage | 200 mV typical @ 50 mA; sustains regulation down to VIN = 3.5 V, supporting cold-crank automotive conditions. |
| Input Voltage Range | 4.0 V to 40 V operating; withstands load-dump transients up to 60 V (survival rating) with reverse polarity protection to −50 V. |
| Output Current | 50 mA continuous; sufficient for powering microcontrollers, CAN transceivers, and low-power sensors in distributed ECUs. |
| Thermal Protection | Internal shutdown at ~160°C junction; prevents catastrophic failure during sustained overload or poor PCB heatsinking. |
| Package | VSSOP-8 (DGK0008A); 3.0 mm × 3.0 mm footprint with 0.5 mm pitch, optimized for space-constrained automotive PCBs. |
Pinout & Package
VSSOP-8 (DGK) package: thermally enhanced 8-pin very thin shrink small-outline package with exposed thermal pad (pin 5 connected to GND internally). Pin 1 marked by dot; pin 1 quadrant Q1 per JEDEC standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Accepts 4.0–40 V DC; must be decoupled near pin with ≥1 µF ceramic capacitor. |
| 2 (GND) | Ground reference | Primary return path; connects to exposed thermal pad (pin 5) for improved thermal performance. |
| 3 (OUT) | Regulated output | Delivers stable 3.3 V; requires 22 µF low-ESR ceramic capacitor (0.3–8 Ω) placed adjacent to pins 3 and 2. |
| 4 (GND) | Ground reference | Secondary ground connection; ties to same net as pin 2 and thermal pad for low-impedance return. |
| 5 (GND / Thermal Pad) | Thermal and electrical ground | Exposed copper pad on bottom surface; must be soldered to ≥100 mm² 2-oz copper pour for θJA ≈ 200°C/W. |
| 6 (GND) | Ground reference | Third ground terminal; reduces ground loop impedance in noise-sensitive analog subsystems. |
| 7 (GND) | Ground reference | Fourth ground terminal; enhances PSRR and stabilizes output under dynamic load steps. |
| 8 (EN) | Enable control | Not present on LM2936MMX-3.3; this variant lacks shutdown pin (unlike LM2936BM series). |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 15 μA max at 100 μA load enables >10-year coin-cell operation in remote keyless entry receivers. |
| Reverse battery protection | Withstands −50 V input without damage; eliminates need for external series diode in 12 V automotive systems. |
| Robust transient immunity | Survives +60 V/−50 V transients per ISO 7637-2; meets automotive load-dump and jump-start requirements. |
| Wide temperature operation | −40°C to +125°C ambient rating supports placement near engine compartments or under-hood ECUs. |
| Stable with ceramic capacitors | Validated for 22 µF X7R/X5R ceramics (0.3–8 Ω ESR); reduces BOM count vs. tantalum alternatives. |
Applications
| Automotive Body Control Module (BCM) | Telematics Control Unit (TCU) Standby Power |
|---|---|
Use Scenario: Powering microcontroller, LIN transceiver, and door lock actuator logic in BCM during vehicle sleep mode. IC Role / Device Role / Timing Role: Primary 3.3 V LDO supplying always-on domain with ultra-low leakage path. Use Value: 15 μA quiescent current limits parasitic drain to <10 µA total system sleep current, extending battery life beyond 6 months. | Use Scenario: Maintaining GPS module RTC, cellular modem wake-up logic, and CAN bus monitoring during vehicle ignition-off state. IC Role / Device Role / Timing Role: Standby regulator delivering clean 3.3 V to low-power subsystems with transient immunity. Use Value: −50 V reverse polarity and +60 V survival ratings prevent field failures during jump-start or battery reversal events. |
| Industrial Sensor Node | Medical Portable Monitor |
Use Scenario: Regulating power for MEMS pressure sensor, ADC, and BLE radio in battery-operated wireless sensor node. IC Role / Device Role / Timing Role: Single-point 3.3 V source enabling precision analog measurement and low-energy wireless transmission. Use Value: 200 mV dropout allows operation down to 3.5 V input, maximizing usable capacity of two-series Li-ion cells (7.4 V nominal → 6.0 V cutoff). | Use Scenario: Supplying patient interface controller, touch screen driver, and data logging flash memory in portable ECG monitor. IC Role / Device Role / Timing Role: Safety-critical 3.3 V rail with thermal shutdown and short-circuit protection. Use Value: Internal thermal shutdown prevents overheating during extended use; ±2% output tolerance ensures reliable ADC reference accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76333DBVR | Lower IQ (1.3 μA), but only 150 mA output; no reverse battery protection; 6 V max input. | Suitable for ultra-low-power IoT nodes, not automotive-grade reverse-polarity environments. | Select when sub-μA quiescent current dominates over fault protection and high-voltage operation. |
| NCP1117ST33T3G | Higher IQ (6 mA), no reverse polarity or transient protection; 20 V max input; TO-220/SOT-223 only. | Fits cost-sensitive industrial supplies where input transients are filtered externally. | Choose for non-automotive applications with stable 5–12 V inputs and no requirement for reverse-battery resilience. |
Compared with TPS76333DBVR and NCP1117ST33T3G, the LM2936MMX-3.3 uniquely combines automotive-grade reverse polarity tolerance (−50 V), 40 V operating input, and 15 μA IQ in a space-efficient VSSOP-8 - making it irreplaceable in unregulated battery-fed automotive modules.
Availability
LM2936MMX-3.3 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, and portable medical devices requiring stable component supply with guaranteed long-term availability and RoHS-compliant green packaging.
Supply support for LM2936MMX-3.3 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 connectivity solutions for industrial, automotive, and personal electronics markets.
The LM2936 product line delivers ultra-low-IQ LDOs engineered specifically for automotive and battery-powered systems demanding extended standby life, high-voltage resilience, and integrated fault protection without external components.
FAQ
What is the maximum input voltage the LM2936MMX-3.3 can handle continuously?
The LM2936MMX-3.3 has a maximum continuous operating input voltage of +40 V. While its absolute maximum survival rating is +60 V for transients, sustained operation above 40 V risks exceeding safe operating area limits and triggering thermal shutdown. Designers must ensure steady-state VIN remains ≤40 V, with margin for ripple and regulation tolerance.
Does the LM2936MMX-3.3 include a shutdown pin?
No, the LM2936MMX-3.3 does not include a shutdown (EN) pin. This variant is a fixed-output, always-on LDO. Shutdown functionality is only available in the LM2936BM series (e.g., LM2936BMMX-3.3), which adds an active-high enable input. The LM2936MMX-3.3 pinout contains eight terminals, all dedicated to power and ground - no control signal capability.
What output capacitor is required for stability with the LM2936MMX-3.3?
The LM2936MMX-3.3 requires a minimum 22 µF ceramic output capacitor with ESR between 0.3 Ω and 8 Ω. X7R or X5R dielectrics are recommended. The capacitor must be placed directly between pins 3 (OUT) and 2 (GND), with short traces and no series inductance. Lower ESR values improve transient response but may risk instability if below 0.3 Ω.
Can the LM2936MMX-3.3 be used in automotive applications with reverse battery connection?
Yes, the LM2936MMX-3.3 includes integrated reverse battery protection and is rated for −50 V input transients. It will not conduct or be damaged when the input is connected with reversed polarity - a critical feature for automotive service environments where battery terminals may be accidentally swapped during replacement or jump-start procedures.
What is the thermal resistance (θJA) of the LM2936MMX-3.3 in its VSSOP-8 package?
The LM2936MMX-3.3 in VSSOP-8 (DGK0008A) has a specified junction-to-ambient thermal resistance (θJA) of 200°C/W under standard JEDEC test conditions (1s pulse, no PCB copper enhancement). Actual θJA improves significantly with proper PCB layout - adding ≥100 mm² of 2-oz copper connected to the exposed thermal pad (pin 5) can reduce effective θJA by 30–40%.
LM2936MMX-3.3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.4V @ 50mA
- Current - Output:
- 50mA
- Current - Quiescent (Iq):
- 15 µA
- Current - Supply (Max):
- 2.5 mA
- PSRR:
- 60dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Temperature, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
LM2936MMX-3.3 FAQ
1.How can I place an order for LM2936MMX-3.3 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2936MMX-3.3 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 LM2936MMX-3.3 reliable?
The price and inventory of LM2936MMX-3.3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2936MMX-3.3 is usually 5 days.
3.What payment methods are accepted for LM2936MMX-3.3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2936MMX-3.3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2936MMX-3.3?
LM2936MMX-3.3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2936MMX-3.3 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 LM2936MMX-3.3?
For technical support, including LM2936MMX-3.3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2936MMX-3.3 requirements.
6.How does Aetrix verify that LM2936MMX-3.3 is sourced from the original manufacturer or authorized distributors?
All LM2936MMX-3.3 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 LM2936MMX-3.3 meets industry standards.
7.What is the process for return or replacement of LM2936MMX-3.3?
All LM2936MMX-3.3 units undergo pre-shipment inspection (PSI). If there is an issue with LM2936MMX-3.3, 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 LM2936MMX-3.3 part is unused and in its original packaging.
Return procedure for LM2936MMX-3.3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2936MMX-3.3 Tags
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