My Inquiry
My Account
Texas Instruments LM2936BMX-3.3
- Part No.:
- LM2936BMX-3.3
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2936BMX-3.3.pdf
- Description:
- IC REG LINEAR 3.3V 50MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,180
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM2936BMX-3.3 from Texas Instruments is a fixed-output 3.3 V ultra-low quiescent current (≤15 μA at 100 μA load) LDO voltage regulator in an 8-pin SOIC package, featuring ±2% initial output tolerance, 200 mV typical dropout at 50 mA, reverse battery protection, and −50 V reverse transient immunity. It serves as a primary power supply for automotive microcontrollers, remote sensors, and always-on telematics modules requiring extended battery life.
For engineers reviewing the LM2936BMX-3.3 datasheet, LM2936BMX-3.3 pinout, LM2936BMX-3.3 application, or LM2936BMX-3.3 equivalent, key selection criteria include shutdown pin functionality, 40 V max operating input voltage, thermal shutdown behavior, and compatibility with low-ESR ceramic output capacitors down to 22 µF.
Technical Context
The LM2936BMX-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, thermal shutdown at ~160°C, and short-circuit current limiting (~120 mA typical).
Unlike standard LDOs, it supports active shutdown via a dedicated logic-level control pin (VIH ≥ 2.0 V, VIL ≤ 0.6 V), reducing quiescent current to ≤30 μA in off-state. Output stability requires a minimum 22 µF ceramic capacitor with ESR ≤ 8 Ω.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V with ±2% initial tolerance - ensures stable MCU core voltage without external feedback. |
| Quiescent Current | ≤15 μA at 100 μA load - enables >10-year battery life in low-power sensor nodes. |
| Dropout Voltage | 200 mV typical at 50 mA - allows regulation from 3.5 V input, critical for aging Li-ion or dual-cell alkaline supplies. |
| Input Voltage Range | 4.0 V to 40 V - supports wide automotive battery transients and industrial 24 V rail operation. |
| Reverse Protection | −50 V transient rating - prevents damage during jump-start or load-dump events in vehicle systems. |
| Shutdown Threshold | VIL ≤ 0.6 V (on), VIH ≥ 2.0 V (off) - compatible with standard CMOS logic without level-shifting. |
| Thermal Shutdown | ~160°C junction temperature - safeguards against sustained overload or poor PCB heatsinking. |
Pinout & Package
LM2936BMX-3.3 is housed in an 8-pin SOIC (Package Drawing D0008A), with exposed pad not present. Thermal performance is optimized using the four ground pins as heat-sinking paths when connected to ≥0.04 in² of 2 oz copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Accepts 4.0–40 V; must be decoupled near pin with ≥1 µF ceramic capacitor. |
| 2 (GND) | Ground reference | One of four GND pins; all must be connected to minimize impedance and improve thermal dissipation. |
| 3 (SHDN) | Active-low shutdown control | Pull ≤0.6 V to enable regulator; ≥2.0 V disables output and reduces IQ to ≤30 μA. |
| 4 (GND) | Ground reference | Second GND pin; electrically identical to Pin 2 and required for SOIC thermal integrity. |
| 5 (GND) | Ground reference | Third GND pin; ties internally to die substrate and aids thermal conduction to PCB. |
| 6 (GND) | Ground reference | Fourth GND pin; completes low-impedance return path for output current and noise filtering. |
| 7 (OUT) | Regulated 3.3 V output | Delivers up to 50 mA; requires ≥22 µF ceramic capacitor with ESR ≤ 8 Ω for stability. |
| 8 (NC) | No connect | Internally unconnected; must remain floating-no routing or soldering permitted. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 15 μA at light load enables multi-year operation on coin-cell or small Li-SOCl₂ batteries. |
| Dedicated shutdown pin | Reduces system standby power by disabling regulator output while preserving configuration state elsewhere. |
| Reverse battery protection | Withstands −50 V transients without external diode, simplifying front-end protection in automotive harnesses. |
| High-voltage input capability | 40 V absolute max input supports 24 V industrial rails and 12 V automotive systems with load-dump margin. |
| Stable with ceramic capacitors | Validated for 22 µF/low-ESR ceramics - eliminates need for costly tantalum or electrolytic output caps. |
Applications
| Automotive Telematics Module | Industrial Remote Sensor Node |
|---|---|
Use Scenario: Always-on GPS/GSM module powered by vehicle battery with ignition-off monitoring. IC Role / Device Role / Timing Role: Primary 3.3 V supply for MCU, GNSS receiver, and cellular modem during sleep mode. Use Value: 15 μA quiescent current limits parasitic drain to <10 µA system-wide, extending battery backup to >3 months. | Use Scenario: Wireless temperature/humidity sensor deployed in unpowered factory zones. IC Role / Device Role / Timing Role: Regulator for ultra-low-power MCU and RF transceiver operating intermittently every 15 minutes. Use Value: Dropout of 200 mV allows full 50 mA output even as primary AA/AAA cells deplete to 3.5 V. |
| Medical Wearable Monitor | Smart Meter Backup Power |
Use Scenario: Continuous ECG patch powered by rechargeable Li-Poly with strict leakage budget. IC Role / Device Role / Timing Role: Stable 3.3 V rail for analog front-end, ADC, and Bluetooth LE radio during measurement bursts. Use Value: ±2% initial tolerance ensures consistent ADC reference accuracy without calibration overhead. | Use Scenario: Non-volatile memory and real-time clock retention during main AC power failure. IC Role / Device Role / Timing Role: Secondary regulator fed from supercapacitor or backup battery to sustain RTC and SRAM. Use Value: Reverse polarity protection prevents damage if backup cell is inserted backward during field maintenance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2936M-3.3/NOPB | No shutdown pin; fixed-enable operation only; same SOIC-8 package and 3.3 V output. | Suitable where system-level enable control is unnecessary or handled externally. | Select when simplified BOM and elimination of SHDN routing outweigh need for software-controlled power gating. |
| TPS76333DBVR | Lower IQ (1.3 μA), but only 16 V max input and no reverse-transient protection; SOT-23-5 package. | Better for space-constrained portable devices with stable low-voltage inputs, not automotive harsh environments. | Choose only if input stays below 16 V and reverse protection is provided upstream; not drop-in compatible. |
Compared with LM2936M-3.3/NOPB, LM2936BMX-3.3 adds programmable shutdown for dynamic power management; compared with TPS76333DBVR, it trades ultra-low IQ for robust 40 V operation and integrated reverse protection essential in automotive designs.
Availability
LM2936BMX-3.3 is available at Aetrix Electronics and suitable for automotive telematics, industrial sensor networks, and medical wearables requiring stable component supply across long product lifecycles and temperature extremes (−40°C to +125°C).
Supply support for LM2936BMX-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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.
The LM2936 product line delivers ultra-low-IQ LDO regulators designed specifically for battery-powered automotive and industrial systems where extended runtime and high-voltage resilience are mandatory.
FAQ
What is the maximum input voltage rating for LM2936BMX-3.3?
The LM2936BMX-3.3 has a maximum operating input voltage of +40 V and can survive transient inputs up to −50 V (reverse polarity) or +60 V (positive surge). Operation above 40 V risks thermal shutdown under load due to safe operating area limits in the internal PNP pass device, so design margins should keep steady-state VIN ≤40 V.
Does LM2936BMX-3.3 require an external capacitor for stability?
Yes, LM2936BMX-3.3 requires a minimum 22 µF ceramic output capacitor with ESR ≤8 Ω for guaranteed stability across temperature and load. The datasheet specifies this value for the SOIC-8 variant; smaller values may cause oscillation, especially with high-frequency loads like RF modems or fast-switching MCUs.
How does the shutdown pin on LM2936BMX-3.3 function?
The SHDN pin (Pin 3) is active-high: applying ≥2.0 V disables the output and reduces quiescent current to ≤30 μA; ≤0.6 V enables regulation. Leaving it open or grounded enables the device. This pin is not 5 V tolerant-input must stay within 0 V to 40 V per datasheet Absolute Maximum Ratings.
Can LM2936BMX-3.3 be used in automotive applications?
Yes, LM2936BMX-3.3 is qualified for −40°C to +125°C operation and includes reverse-battery protection (−50 V), load-dump tolerance (60 V transient), and thermal shutdown-making it suitable for automotive body control modules, telematics units, and infotainment subsystems compliant with ISO 7637-2 and AEC-Q100 stress requirements.
What is the output current capability of LM2936BMX-3.3?
LM2936BMX-3.3 delivers up to 50 mA continuous output current. Actual deliverable current depends on ambient temperature, input voltage, and PCB thermal design: at 25°C ambient and 12 V input, full 50 mA is achievable; at 125°C ambient or 40 V input, output current drops to ~18 mA to avoid thermal shutdown.
LM2936BMX-3.3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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:
- Shutdown
- 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-SOIC
LM2936BMX-3.3 FAQ
1.How can I place an order for LM2936BMX-3.3 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2936BMX-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 LM2936BMX-3.3 reliable?
The price and inventory of LM2936BMX-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 LM2936BMX-3.3 is usually 5 days.
3.What payment methods are accepted for LM2936BMX-3.3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2936BMX-3.3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2936BMX-3.3?
LM2936BMX-3.3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2936BMX-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 LM2936BMX-3.3?
For technical support, including LM2936BMX-3.3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2936BMX-3.3 requirements.
6.How does Aetrix verify that LM2936BMX-3.3 is sourced from the original manufacturer or authorized distributors?
All LM2936BMX-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 LM2936BMX-3.3 meets industry standards.
7.What is the process for return or replacement of LM2936BMX-3.3?
All LM2936BMX-3.3 units undergo pre-shipment inspection (PSI). If there is an issue with LM2936BMX-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 LM2936BMX-3.3 part is unused and in its original packaging.
Return procedure for LM2936BMX-3.3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2936BMX-3.3 Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
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…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
